Re: Tracking issues with an AP600e Goto


Mar 27, 2000

 


----------------------------

#460 Mar 27, 2000

Hi all:



My new 600E GOTO arrived this morning! I then spent the pm reading the

instructions and then phoning Christine at AP for an answer to a very

stupid question on my part. Don't ask - it was really, really

stupid!!!! But she is a very nice lady to talk to. And very

understanding.



Now for a clear night!



I think that a pier will be on the list next. Are they making more any

time soon I wonder?



Chris. Spratt



----------------------------

#461 Mar 27, 2000

Hi all:

>

>My new 600E GOTO arrived this morning! I then spent the pm reading the

>instructions and then phoning Christine at AP for an answer to a very

>stupid question on my part. Don't ask - it was really, really

>stupid!!!! But she is a very nice lady to talk to. And very

>understanding.





Congratulations!



I'm glad Christine could get away from making a

big pot of focuser grease to answer your question. ;-)



Rich





>

>Now for a clear night!

>

>I think that a pier will be on the list next. Are they making more any

>time soon I wonder?

>

>Chris. Spratt

>

>

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----------------------------

#522 Apr 11, 2000

Anyone know what the tip polarity is on the DC power cable? Is the tip

center negative or positive?



----------------------------

#536 Apr 12, 2000

Positive

Marjorie Christen

Astro-Physics



-----Original Message-----

From:.Chris Spratt [mailto:cspratt@...]

Sent:.Tuesday, April 11, 2000 1:27 PM

To:.ap-gto@egroups.com;

Subject:.[ap-gto] DC power cable for AP600E Goto



Anyone know what the tip polarity is on the DC power cable? Is the tip

center negative or positive?





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----------------------------

#610 May 15, 2000

Just out of curiousity I'm wondering how long others have managed a

typical unguided CCD exposure. I've managed 4 minutes once at F/5.0

but most of the time despite good "drift aligning" I can only get 2

minutes most nights. 90 seconds being the norm. Am I expecting too

much for a portable tripod setup which I take down each night?

The old AP 400 QMD was just as accurate when trying to do CCD work. I

was hoping the 600E would be an improvment.



Training the PEC dosen't seem to help.



I'm using an old C8 and was wondering if "mirror shift" may be the

main culprit.



Comments anyone?



----------------------------

#611 May 15, 2000

At that focal length I get 2 min. unguided about 50% of the time with the

AP600, so your performance sounds consistent with my experience.



However, if I use the autoguider to train the PEC, I can get better.



Bob Kuberek





Chris Spratt wrote:

> Just out of curiousity I'm wondering how long others have managed a

> typical unguided CCD exposure. I've managed 4 minutes once at F/5.0

> but most of the time despite good "drift aligning" I can only get 2

> minutes most nights. 90 seconds being the norm. Am I expecting too



----------------------------

#1171 Jul 22, 2000

Previous messages posted to this group have been about the carrying

capacity of the AP400 GOTO mounts - whether or not a 10" Meade OTA

and similar OTAs would be too much for this mount.



I have the AP600E Goto and I know that the 11" OTA Celestron would be

overweight for this mount for phtographic or CCD work (Roland told me

that).



Ron W. indicated that the 9.25" OTA was just about the limit for his

AP600E (last year's model) and he had to get the motors reset by

Roland's people. (Sort of the gist of the problem anyway).



So my question is the 9.25" still to large for the AP600E Goto as it

would be placing too much of a torque load on the mount when a CCD

etc

are added?



Right now my 600E carries my C8 OTA, Pixcel 237 CCD, a bar with rings

to hold my Orion 80mm short focal length refractor and a 12"

long sonotube extension on the OTA for a light-shield. In the fall

the

CCD will be an SBIG 7E which is a bit heavier than the Pixcel 237.



The 600E sits on the AP wooden tripod and I can manage to get about a

two minute unguided exposure. I know I have an orthonogality problem

but have yet to solve that problem entirely. With luck the 7E will

help with guiding.



Will the 9.25" work this way as a replacment for the 8"?



----------------------------

#1191 Jul 24, 2000

Previous messages posted to this group have been about the carrying

capacity of the AP400 GOTO mounts - whether or not a 10" Meade OTA

and similar OTAs would be too much for this mount.



I have the AP600E Goto and I know that the 11" OTA Celestron would be

overweight for this mount for phtographic or CCD work (Roland told me

that).



Ron W. indicated that the 9.25" OTA was just about the limit for his

AP600E (last year's model) and he had to get the motors reset by

Roland's people. (Sort of the gist of the problem anyway).



So my question is the 9.25" still to large for the AP600E Goto as it

would be placing too much of a torque load on the mount when a CCD

etc are added?



Right now my 600E carries my C8 OTA, Pixcel 237 CCD, a bar with rings

to hold my Orion 80mm short focal length refractor and a 12"

long sonotube extension on the OTA for a light-shield. In the fall

the CCD will be an SBIG 7E which is a bit heavier than the Pixcel 237.



The 600E sits on the AP wooden tripod and I can manage to get about a

two minute unguided exposure. I know I have an orthonogality problem

but have yet to solve that problem entirely. With luck the 7E will

help with guiding.



Will the 9.25" work this way as a replacment for the 8"?







----------------------------

#1558 Nov 4, 2000

Will the 10" F/9 (32 lbs) Ritchey-Chretian OTA from RC Optics be too

much for the AP600E Goto?



What is the largest OTA the AP600E Goto can handle (CCD and

photographic work)?



----------------------------

#1559 Nov 4, 2000

Will the 10" F/9 (32 lbs) Ritchey-Chretian OTA from RC Optics be too

> much for the AP600E Goto?



IMHO, that would not be a workable combination. I have an AP 600E GTO and I use

my 130 mm f/6 with an JMI NGF-S, and a ST-8e and CFW-8 and that is about all the

load (about 24 lbs.) that I would put on the AP 600E GTO... but that is for

astro-imaging.



The 10" RC from RCOS weighs 32 lbs. "naked." Add a few lbs. for mounting

plates, oculars, etc, and your up over 35 lbs. That's a lot of weight for the

600E GTO. Forget astro-imaging with that. Will it work for visual? I'm not

sure, but why would one want a telescope that is optimized for imaging as a

visual-only instrument?

> What is the largest OTA the AP600E Goto can handle (CCD and

> photographic work)?



You might get away with a six inch refractor if it wasn't too heavy (that leaves

out some of the TAK models, for sure). With the 155 mm Starfire, it might work,

but that would be pushing it a bit. An 8" SCT or a 5" refractor would be a

better match for the 600E GTO. Of the two, the refractor is much easier to use

for astro-imaging... less headaches too... and more fun.



Larry

--



kldenmark@...

home.att.net/~kldenmark/towardinfinity



----------------------------

#1560 Nov 5, 2000

I currently have 32 pound OTA plus finder, 2" diagonal, TV grenade eyepieces

on my AP 600EGTO and the mount does not have any trouble.



Peter in Manhattan



----------------------------

#1569 Nov 6, 2000

In a message dated 11/4/00 9:27:58 PM Central Standard Time,

cspratt@... writes:



< Will the 10" F/9 (32 lbs) Ritchey-Chretian OTA from RC Optics be too

much for the AP600E Goto?>>



Too big, in my opinion for CCD, OK for visual.

>> What is the largest OTA the AP600E Goto can handle (CCD and

photographic work)?>>



9.25" Celestron.



Roland Christen

>>



----------------------------

#2935 Jul 4, 2001

My AP600 GOTO has, over time, developed a slight excess backlash in

RA. I've tried all settings (0-9)at 12x but nothing really works to

remove it all.



Is there an "easy" check/adjustment? (I'm a mechanical "klutz").



I also live on west coast with different time zone from AP and I also

work week days. So if I have to call with mount in front of me I'll

have to wait until the next weekday off (month or so). So I was

thinking that there may be a possiblity of some illustrated

instructions being posted on the web site to help with this situation.



----------------------------

#2947 Jul 4, 2001

cspratt



Sounds like the worm gear might be loose on its shaft -- but better to wait

for Roland's diagnosis and recommendation for treatment.



Joe *Doc* Ewing

Conroe, Texas



----------------------------

#2950 Jul 5, 2001

In a message dated 7/4/2001 1:33:40 PM Pacific Daylight Time,

cspratt@... writes:



> My AP600 GOTO has, over time, developed a slight excess backlash in

> RA. I've tried all settings (0-9)at 12x but nothing really works to

> remove it all.

>

>



Mechanical backlash can be removed by putting the worm into full mesh with

the worm gear. This is done by loosening the 2 Allen heas screws that hold

the worm assembly on the mount, and gently pushing the assembly into mesh

with light finger pressure, and then retightening the 2 Allen head screws. If

you call our number early in the morning before you go to work, and ask for

Wally, he will be able to walk you thru the adjustment. It is not that hard

to do.



Roland Christen





[Non-text portions of this message have been removed]



----------------------------

#2951 Jul 5, 2001

In a message dated 7/4/2001 8:54:11 PM Pacific Daylight Time,

JosephGEwing@... writes:



> Sounds like the worm gear might be loose on its shaft



The worm gear does not ride on a shaft. It is integral with the shaft, in

other words, worm and shaft are one piece.



Roland Christen





[Non-text portions of this message have been removed]



----------------------------

#2952 Jul 5, 2001

Are these allen headed screws metric? If so size?

> Mechanical backlash can be removed by putting the worm into full

mesh with > the worm gear. This is done by loosening the 2 Allen heas screws

that hold > the worm assembly on the mount, and gently pushing the assembly

into mesh > with light finger pressure, and then retightening the 2 Allen head

screws. If > you call our number early in the morning before you go to work, and

ask for > Wally, he will be able to walk you thru the adjustment. It is not

that hard > to do.

>

> Roland Christen

>

>

> [Non-text portions of this message have been removed]



----------------------------

#2955 Jul 5, 2001

In a message dated 7/5/2001 1:16:16 PM Pacific Daylight Time,

cspratt@... writes:



> Are these allen headed screws metric? If so size?

>

>



They are 1/4-20, but a metric will fit also. Can you see them on your mount?



Roland Christen





[Non-text portions of this message have been removed]







----------------------------

#2959 Jul 5, 2001

Only ones I can see are either side of the declination lock knob. Look

to be right size. I assume when these are removed the top lifts off.

I haven't done this though as I've no idea what will drop out etc:!

I still think some illustrations on web page (Technical area) may

help.



Chris. Spratt

--- In ap-gto@y..., chris1011@a... wrote:

> In a message dated 7/5/2001 1:16:16 PM Pacific Daylight Time,

> cspratt@i... writes:

>

>

> > Are these allen headed screws metric? If so size?

> >

> >

>

> They are 1/4-20, but a metric will fit also. Can you see them on

your mount?

>

> Roland Christen

>

>

> [Non-text portions of this message have been removed]



----------------------------

#3386 Sep 1, 2001

Saturday, September 1, 2001

Dear Fellow AP mount users,

I was wondering if anyone could please help me with my 600E GoTo Mount

with a tracking problem I'm having. I am using the AP 130 telescope with the

mount.

I polar aligned in the daytime with the sun and the park positions. I

polar aligned with the sun today more than 10 times over the course of more

than 4 hours. I got to the point that I could slew to Venus and have it dead

center with a 22mm Nagler T4. I then went back to the sun and it was also dead

center in the eyepiece.

The problem is -- after Venus is acquired it constantly drifts out of the

field of view and I have to continually correct with the arrow keys. If I go

back and request slew to Venus, Venus is again dead center, but immediately

begins to drift out of the vield of view at my lowest power of 35x. I balance

the mount with 2 9# weights and balance seems to be OK. Does anyone have any

ideas of what I am doing wrong? I tried with Sol. and Side. tracking from

the main menu without any improvement.

Also, the Recalc function doesn't seem to work for me. After RA selected,

and #9 selected - the program doesn't let me out of this screen. I tried

pressing RA again (that got me into the screen), but nothing happened. The

only way I could get out was to push Menu. Am I doing something wrong? This

recalc also doesn't help at all with the tracking problem I'm having. Am I

doing something wrong, or overlooking something? Or is there another problem

that might be causing my mount's inability to track Venus or the Sun??? If

I'm doing something stupid or not doing something I should be doing please

please excuse my lack of experience.

Thank you for any help or suggestions you might give me.

Sincerely, Richard Lapides in California

eMail: Lapides.Family@...



----------------------------

#3389 Sep 1, 2001

In a message dated 9/1/2001 4:04:35 PM Pacific Daylight Time,

lapides.family@... writes:



> .

> The problem is -- after Venus is acquired it constantly drifts out of

> the

> field of view and I have to continually correct with the arrow keys. If I go

> back and request slew to Venus, Venus is again dead center, but immediately

> begins to drift out of the vield of view at my lowest power of 35x



Both Venus and the Moon do drift in the eyepiece at high powers because they

do not have the same motions as the stars or the sun. During certain portions

of the orbit, Venus does travel quite rapidly against the background stars.

There is no one fixed rate that will allow you to track these objects. When I

image the Moon at high powers, I actually offset my alt and az axes so that

the Moon will stay still for a period of time. Ideally, one would like to

dial in a variable rate for both axes that will slowly follow all such

objects. We are considering such a system for the future. At this time it

cannot be done.



If the object drifts out at low powers, then you probably have not reached

polar alignment, although the fact that you can get it back each time seems

to indicate that the object is moving rapidly in its orbit at this time. Have

you tried tracking the sun? Does it also drift out?



Roland Christen





[Non-text portions of this message have been removed]



----------------------------

#3390 Sep 1, 2001

In a message dated 9/1/2001 4:04:35 PM Pacific Daylight Time,

lapides.family@... writes:



> Or is there another problem

> that might be causing my mount's inability to track Venus or the Sun???



Another thought, are your clutches tight? If the RA axis is not tight, and

you have too much counterweight for the scope's weight (i.e. not in balance),

then the clutch might be slipping. Another thing to check, is it tracking in

Southern or northern hemisphere?



Roland Christen





[Non-text portions of this message have been removed]



----------------------------

#3392 Sep 1, 2001

Saturday, September 1, 2001

Dear Roland,

Thank you for your quick reply. Last week Wally helped me adjust my backlash.

He tested this out with me after the adjustment by using the direction buttons

when he was finished and everything seemed OK and worked properly, but they may

have been tightened down to snugly (?) The arrow buttons do work properly. Does

this indicate that the clutches are adjusted properly?

I tried using only one 9# weight at the very end of the counterweight bar,

but that was not enough weight. I use the heavy Naglers and the heavy 2" 4x

TeleVue Barlow along with the AP finder scope. In order to make enough room for

the leveler, I put one 9# weight at the top of the counter-weight bar and the

other 9# one near the bottom of the bar. Marj suggested this to me. Previously

both 9# weights were about in the center of the bar, but this didn't alllow room

for the level. I was trying to put level on top of the 2 weights, but because

the diameters were slightly different the level would slope. I also tried putting

on the top of just one weight.

I just rememnbered that I did receive the message "Motor Stall". I than

tried slewing to another object and mount worked as did the directional buttons,

so I forgot about this "Motor Stall" message. I also checked the connections and

plugs and they seemed to be OK.

For Venus tracking I was using my lowest power eyepiece (22mm or about 35x).

For tracking the sun I was also using this same 22x. Both Venus and the Sun

immediately began to drift at 35x after they were acquired. I guessed that the

motors were working properly since when I went to Venus it was dead on for the

3 times I tried it. If the clutches were slipping, I guessed it wouldn't return

to the correct position each time - would it? As a matter of fact, each time

Venus went out of the field of view I used the go to Venus command to skew back

to Venus and it did return to dead center of the eyepiece.

The same problem with the sun, but drifting was slower since the diameter is

so much larger. The sun went completely out of the 35x field of view within 8-10

minutes or so. Venus was only able to stay in the field of view for about 2

minutes at 35x. You said that Venus does drift at high powers, but I used a lower

35x power. Even at 8x looking at Venus in the AP Right-Angle finder you can

visually see it traveling down the field of view in the finder scope. Venus

remains in the field of view much longer in the finder scope of course.

Any ideas? Do you think the recalibration problem I desccribed before might

be causing the problem ?. Is there a problem with the recalibration routine

based on my comments ? T hank you again for any help, or suggestions?

Sincerely, Richard Lapides in California











chris1011@... wrote:

> In a message dated 9/1/2001 4:04:35 PM Pacific Daylight Time,

> lapides.family@... writes:

>

> > Or is there another problem

> > that might be causing my mount's inability to track Venus or the Sun???

>

> Another thought, are your clutches tight? If the RA axis is not tight, and

> you have too much counterweight for the scope's weight (i.e. not in balance),

> then the clutch might be slipping. Another thing to check, is it tracking in

> Southern or northern hemisphere?

>

> Roland Christen

>

> [Non-text portions of this message have been removed]

>

> To UNSUBSCRIBE, or for general information on the ap-gto list

> see groups.yahoo.com/group/ap-gto

>

> Your use of Yahoo! Groups is subject to docs.yahoo.com/info/terms/







----------------------------

#3393 Sep 1, 2001

Saturday, Sept. 1, 2001

Dear Roland,

I just did a test on my 600E mount. After the sun is acquired, it begins to

drift and looking at the cross hairs in the 8x50 AP right-angle finder scope, the

sun drifts from the dead center of the eyepiece to the outside perimeter of the

disk in 5 minutes. Issuing the command goto the sun brings the sun back into dead

center of the eyepiece and at the center of the finder cross-hairs. In a visual

inspection, it looked like to me that only the Right-Ascension axis moved to get

the sun back to the center of the eyepiece. Does this help in diagnosising the

problem?

Thanks Again, Richard Lapides in California







chris1011@... wrote:

> In a message dated 9/1/2001 4:04:35 PM Pacific Daylight Time,

> lapides.family@... writes:

>

> > Or is there another problem

> > that might be causing my mount's inability to track Venus or the Sun???

>

> Another thought, are your clutches tight? If the RA axis is not tight, and

> you have too much counterweight for the scope's weight (i.e. not in balance),

> then the clutch might be slipping. Another thing to check, is it tracking in

> Southern or northern hemisphere?

>

> Roland Christen

>

> [Non-text portions of this message have been removed]

>

> To UNSUBSCRIBE, or for general information on the ap-gto list

> see groups.yahoo.com/group/ap-gto

>

> Your use of Yahoo! Groups is subject to docs.yahoo.com/info/terms/



----------------------------

#3394 Sep 1, 2001

How well is the scope balanced with everything that your are using for

viewing, eyepieces, finder scope, etc.?



The drift of the Sun is in what direction? Does it follow the RA buttons

direction, or the Dec buttons?



Regards,

Robin



Astro Accessories by Robin Casady

Stainless Steel Weights & Dovetail Saddles

www.CarmelCoast.com/Astro/sales.html



Casady & Greene, Inc.

www.casadyg.com





On 9/1/01 5:15 PM lapides.family@... wrote:



> Saturday, September 1, 2001

> Dear Roland,

> Thank you for your quick reply. Last week Wally helped me adjust my

> backlash.

> He tested this out with me after the adjustment by using the direction buttons

> when he was finished and everything seemed OK and worked properly, but they

> may

> have been tightened down to snugly (?) The arrow buttons do work properly.

> Does

> this indicate that the clutches are adjusted properly?

> I tried using only one 9# weight at the very end of the counterweight bar,

> but that was not enough weight. I use the heavy Naglers and the heavy 2" 4x

> TeleVue Barlow along with the AP finder scope. In order to make enough room

> for

> the leveler, I put one 9# weight at the top of the counter-weight bar and the

> other 9# one near the bottom of the bar. Marj suggested this to me. Previously

> both 9# weights were about in the center of the bar, but this didn't alllow

> room

> for the level. I was trying to put level on top of the 2 weights, but because

> the diameters were slightly different the level would slope. I also tried

> putting

> on the top of just one weight.

> I just rememnbered that I did receive the message "Motor Stall". I than

> tried slewing to another object and mount worked as did the directional

> buttons,

> so I forgot about this "Motor Stall" message. I also checked the connections

> and

> plugs and they seemed to be OK.

> For Venus tracking I was using my lowest power eyepiece (22mm or about 35x).

> For tracking the sun I was also using this same 22x. Both Venus and the Sun

> immediately began to drift at 35x after they were acquired. I guessed that the

> motors were working properly since when I went to Venus it was dead on for the

> 3 times I tried it. If the clutches were slipping, I guessed it wouldn't

> return

> to the correct position each time - would it? As a matter of fact, each time

> Venus went out of the field of view I used the go to Venus command to skew

> back

> to Venus and it did return to dead center of the eyepiece.

> The same problem with the sun, but drifting was slower since the diameter is

> so much larger. The sun went completely out of the 35x field of view within

> 8-10

> minutes or so. Venus was only able to stay in the field of view for about 2

> minutes at 35x. You said that Venus does drift at high powers, but I used a

> lower

> 35x power. Even at 8x looking at Venus in the AP Right-Angle finder you can

> visually see it traveling down the field of view in the finder scope. Venus

> remains in the field of view much longer in the finder scope of course.

> Any ideas? Do you think the recalibration problem I desccribed before might

> be causing the problem ?. Is there a problem with the recalibration routine

> based on my comments ? T hank you again for any help, or suggestions?

> Sincerely, Richard Lapides in California

>

>

>

>

>

> chris1011@... wrote:

>

>> In a message dated 9/1/2001 4:04:35 PM Pacific Daylight Time,

>> lapides.family@... writes:

>>

>>> Or is there another problem

>>> that might be causing my mount's inability to track Venus or the Sun???

>>

>> Another thought, are your clutches tight? If the RA axis is not tight, and

>> you have too much counterweight for the scope's weight (i.e. not in balance),

>> then the clutch might be slipping. Another thing to check, is it tracking in

>> Southern or northern hemisphere?

>>

>> Roland Christen

>>

>> [Non-text portions of this message have been removed]

>>

>> To UNSUBSCRIBE, or for general information on the ap-gto list

>> see groups.yahoo.com/group/ap-gto

>>

>> Your use of Yahoo! Groups is subject to docs.yahoo.com/info/terms/

>

>

>

> To UNSUBSCRIBE, or for general information on the ap-gto list

> see groups.yahoo.com/group/ap-gto

>

> Your use of Yahoo! Groups is subject to docs.yahoo.com/info/terms/

>

>







----------------------------

#3395 Sep 1, 2001

Hi Robin,

The sun drifts only down on the Right Ascencion axis only. There seems to be no

tracking on the RA axis. I balanced and everything seems OK. This RA problem seems

curious since all the directional buttons work. Also, when sun drifts out of field

of view in 5 minutes, I have to issue the "Go To the sun" command and the sun

returns to dead center of the finder and telescope. After I issue the command the RA

axis moves to the correct location. Except -- the suns then immediately begins to

drift out of the field of view again. It seems like the problem is with the RA

axis. What do you think? Do you have any ideas of what I can do to get tracking on

the RA axis?

Thank You for any comments or suggestions you might give to me.

Sincerely, Richard Lapides in California











Robin Casady wrote:

> How well is the scope balanced with everything that your are using for

> viewing, eyepieces, finder scope, etc.?

>

> The drift of the Sun is in what direction? Does it follow the RA buttons

> direction, or the Dec buttons?

>

> Regards,

> Robin

>

> Astro Accessories by Robin Casady

> Stainless Steel Weights & Dovetail Saddles

> www.CarmelCoast.com/Astro/sales.html

>

> Casady & Greene, Inc.

> www.casadyg.com

>

> On 9/1/01 5:15 PM lapides.family@... wrote:

>

> > Saturday, September 1, 2001

> > Dear Roland,

> > Thank you for your quick reply. Last week Wally helped me adjust my

> > backlash.

> > He tested this out with me after the adjustment by using the direction buttons

> > when he was finished and everything seemed OK and worked properly, but they

> > may

> > have been tightened down to snugly (?) The arrow buttons do work properly.

> > Does

> > this indicate that the clutches are adjusted properly?

> > I tried using only one 9# weight at the very end of the counterweight bar,

> > but that was not enough weight. I use the heavy Naglers and the heavy 2" 4x

> > TeleVue Barlow along with the AP finder scope. In order to make enough room

> > for

> > the leveler, I put one 9# weight at the top of the counter-weight bar and the

> > other 9# one near the bottom of the bar. Marj suggested this to me. Previously

> > both 9# weights were about in the center of the bar, but this didn't alllow

> > room

> > for the level. I was trying to put level on top of the 2 weights, but because

> > the diameters were slightly different the level would slope. I also tried

> > putting

> > on the top of just one weight.

> > I just rememnbered that I did receive the message "Motor Stall". I than

> > tried slewing to another object and mount worked as did the directional

> > buttons,

> > so I forgot about this "Motor Stall" message. I also checked the connections

> > and

> > plugs and they seemed to be OK.

> > For Venus tracking I was using my lowest power eyepiece (22mm or about 35x).

> > For tracking the sun I was also using this same 22x. Both Venus and the Sun

> > immediately began to drift at 35x after they were acquired. I guessed that the

> > motors were working properly since when I went to Venus it was dead on for the

> > 3 times I tried it. If the clutches were slipping, I guessed it wouldn't

> > return

> > to the correct position each time - would it? As a matter of fact, each time

> > Venus went out of the field of view I used the go to Venus command to skew

> > back

> > to Venus and it did return to dead center of the eyepiece.

> > The same problem with the sun, but drifting was slower since the diameter is

> > so much larger. The sun went completely out of the 35x field of view within

> > 8-10

> > minutes or so. Venus was only able to stay in the field of view for about 2

> > minutes at 35x. You said that Venus does drift at high powers, but I used a

> > lower

> > 35x power. Even at 8x looking at Venus in the AP Right-Angle finder you can

> > visually see it traveling down the field of view in the finder scope. Venus

> > remains in the field of view much longer in the finder scope of course.

> > Any ideas? Do you think the recalibration problem I desccribed before might

> > be causing the problem ?. Is there a problem with the recalibration routine

> > based on my comments ? T hank you again for any help, or suggestions?

> > Sincerely, Richard Lapides in California

> >

> >

> >

> >

> >

> > chris1011@... wrote:

> >

> >> In a message dated 9/1/2001 4:04:35 PM Pacific Daylight Time,

> >> lapides.family@... writes:

> >>

> >>> Or is there another problem

> >>> that might be causing my mount's inability to track Venus or the Sun???

> >>

> >> Another thought, are your clutches tight? If the RA axis is not tight, and

> >> you have too much counterweight for the scope's weight (i.e. not in balance),

> >> then the clutch might be slipping. Another thing to check, is it tracking in

> >> Southern or northern hemisphere?

> >>

> >> Roland Christen

> >>

> >> [Non-text portions of this message have been removed]

> >>

> >> To UNSUBSCRIBE, or for general information on the ap-gto list

> >> see groups.yahoo.com/group/ap-gto

> >>

> >> Your use of Yahoo! Groups is subject to docs.yahoo.com/info/terms/

> >

> >

> >

> > To UNSUBSCRIBE, or for general information on the ap-gto list

> > see groups.yahoo.com/group/ap-gto

> >

> > Your use of Yahoo! Groups is subject to docs.yahoo.com/info/terms/

> >

> >

>

> To UNSUBSCRIBE, or for general information on the ap-gto list

> see groups.yahoo.com/group/ap-gto

>

> Your use of Yahoo! Groups is subject to docs.yahoo.com/info/terms/







----------------------------

#3396 Sep 1, 2001

What tracking rate is the mount set on? You might try changing to Solar,

Lunar, etc. to see if there is any difference.



Regards,

Robin



Astro Accessories by Robin Casady

Stainless Steel Weights & Dovetail Saddles

www.CarmelCoast.com/Astro/sales.html



Casady & Greene, Inc.

www.casadyg.com





On 9/1/01 6:39 PM lapides.family@... wrote:



> Hi Robin,

> The sun drifts only down on the Right Ascencion axis only. There seems to be

> no

> tracking on the RA axis. I balanced and everything seems OK. This RA problem

> seems

> curious since all the directional buttons work. Also, when sun drifts out of

> field

> of view in 5 minutes, I have to issue the "Go To the sun" command and the sun

> returns to dead center of the finder and telescope. After I issue the command

> the RA

> axis moves to the correct location. Except -- the suns then immediately begins

> to

> drift out of the field of view again. It seems like the problem is with the

> RA

> axis. What do you think? Do you have any ideas of what I can do to get

> tracking on

> the RA axis?

> Thank You for any comments or suggestions you might give to me.

> Sincerely, Richard Lapides in California

>

>

>

>

>

> Robin Casady wrote:

>

>> How well is the scope balanced with everything that your are using for

>> viewing, eyepieces, finder scope, etc.?

>>

>> The drift of the Sun is in what direction? Does it follow the RA buttons

>> direction, or the Dec buttons?

>>

>> Regards,

>> Robin

>>

>> Astro Accessories by Robin Casady

>> Stainless Steel Weights & Dovetail Saddles

>> www.CarmelCoast.com/Astro/sales.html

>>

>> Casady & Greene, Inc.

>> www.casadyg.com

>>

>> On 9/1/01 5:15 PM lapides.family@... wrote:

>>

>>> Saturday, September 1, 2001

>>> Dear Roland,

>>> Thank you for your quick reply. Last week Wally helped me adjust my

>>> backlash.

>>> He tested this out with me after the adjustment by using the direction

>>> buttons

>>> when he was finished and everything seemed OK and worked properly, but they

>>> may

>>> have been tightened down to snugly (?) The arrow buttons do work properly.

>>> Does

>>> this indicate that the clutches are adjusted properly?

>>> I tried using only one 9# weight at the very end of the counterweight bar,

>>> but that was not enough weight. I use the heavy Naglers and the heavy 2" 4x

>>> TeleVue Barlow along with the AP finder scope. In order to make enough room

>>> for

>>> the leveler, I put one 9# weight at the top of the counter-weight bar and

>>> the

>>> other 9# one near the bottom of the bar. Marj suggested this to me.

>>> Previously

>>> both 9# weights were about in the center of the bar, but this didn't alllow

>>> room

>>> for the level. I was trying to put level on top of the 2 weights, but

>>> because

>>> the diameters were slightly different the level would slope. I also tried

>>> putting

>>> on the top of just one weight.

>>> I just rememnbered that I did receive the message "Motor Stall". I than

>>> tried slewing to another object and mount worked as did the directional

>>> buttons,

>>> so I forgot about this "Motor Stall" message. I also checked the connections

>>> and

>>> plugs and they seemed to be OK.

>>> For Venus tracking I was using my lowest power eyepiece (22mm or about

>>> 35x).

>>> For tracking the sun I was also using this same 22x. Both Venus and the Sun

>>> immediately began to drift at 35x after they were acquired. I guessed that

>>> the

>>> motors were working properly since when I went to Venus it was dead on for

>>> the

>>> 3 times I tried it. If the clutches were slipping, I guessed it wouldn't

>>> return

>>> to the correct position each time - would it? As a matter of fact, each

>>> time

>>> Venus went out of the field of view I used the go to Venus command to skew

>>> back

>>> to Venus and it did return to dead center of the eyepiece.

>>> The same problem with the sun, but drifting was slower since the diameter

>>> is

>>> so much larger. The sun went completely out of the 35x field of view within

>>> 8-10

>>> minutes or so. Venus was only able to stay in the field of view for about 2

>>> minutes at 35x. You said that Venus does drift at high powers, but I used a

>>> lower

>>> 35x power. Even at 8x looking at Venus in the AP Right-Angle finder you can

>>> visually see it traveling down the field of view in the finder scope. Venus

>>> remains in the field of view much longer in the finder scope of course.

>>> Any ideas? Do you think the recalibration problem I desccribed before

>>> might

>>> be causing the problem ?. Is there a problem with the recalibration

>>> routine

>>> based on my comments ? T hank you again for any help, or suggestions?

>>> Sincerely, Richard Lapides in California

>>>

>>>

>>>

>>>

>>>

>>> chris1011@... wrote:

>>>

>>>> In a message dated 9/1/2001 4:04:35 PM Pacific Daylight Time,

>>>> lapides.family@... writes:

>>>>

>>>>> Or is there another problem

>>>>> that might be causing my mount's inability to track Venus or the Sun???

>>>>

>>>> Another thought, are your clutches tight? If the RA axis is not tight, and

>>>> you have too much counterweight for the scope's weight (i.e. not in

>>>> balance),

>>>> then the clutch might be slipping. Another thing to check, is it tracking

>>>> in

>>>> Southern or northern hemisphere?

>>>>

>>>> Roland Christen

>>>>

>>>> [Non-text portions of this message have been removed]

>>>>

>>>> To UNSUBSCRIBE, or for general information on the ap-gto list

>>>> see groups.yahoo.com/group/ap-gto

>>>>

>>>> Your use of Yahoo! Groups is subject to docs.yahoo.com/info/terms/

>>>

>>>

>>>

>>> To UNSUBSCRIBE, or for general information on the ap-gto list

>>> see groups.yahoo.com/group/ap-gto

>>>

>>> Your use of Yahoo! Groups is subject to docs.yahoo.com/info/terms/

>>>

>>>

>>

>> To UNSUBSCRIBE, or for general information on the ap-gto list

>> see groups.yahoo.com/group/ap-gto

>>

>> Your use of Yahoo! Groups is subject to docs.yahoo.com/info/terms/

>

>

>

> To UNSUBSCRIBE, or for general information on the ap-gto list

> see groups.yahoo.com/group/ap-gto

>

> Your use of Yahoo! Groups is subject to docs.yahoo.com/info/terms/

>

>







----------------------------

#3397 Sep 1, 2001

Robin, I did try changing to Sol. and Side. rates but this had no effect, and the

RA axis continues to not tract even though all four of the directional buttons all

work. Also, the initial go to commands works and brings the object into dead-center

of the eyepiece, when the drifting in the RA begins immediately. It seems like this

a real mystery to me. I don't think I understand the inner workings of the mount to

have any idea of what's going on that is wrong.

Thanks for any thoughts you might have.

Sincerely, Richard Lapides in California









Robin Casady wrote:

> What tracking rate is the mount set on? You might try changing to Solar,

> Lunar, etc. to see if there is any difference.

>

> Regards,

> Robin

>

> Astro Accessories by Robin Casady

> Stainless Steel Weights & Dovetail Saddles

> www.CarmelCoast.com/Astro/sales.html

>

> Casady & Greene, Inc.

> www.casadyg.com

>

> On 9/1/01 6:39 PM lapides.family@... wrote:

>

> > Hi Robin,

> > The sun drifts only down on the Right Ascencion axis only. There seems to be

> > no

> > tracking on the RA axis. I balanced and everything seems OK. This RA problem

> > seems

> > curious since all the directional buttons work. Also, when sun drifts out of

> > field

> > of view in 5 minutes, I have to issue the "Go To the sun" command and the sun

> > returns to dead center of the finder and telescope. After I issue the command

> > the RA

> > axis moves to the correct location. Except -- the suns then immediately begins

> > to

> > drift out of the field of view again. It seems like the problem is with the

> > RA

> > axis. What do you think? Do you have any ideas of what I can do to get

> > tracking on

> > the RA axis?

> > Thank You for any comments or suggestions you might give to me.

> > Sincerely, Richard Lapides in California

> >

> >

> >

> >

> >

> > Robin Casady wrote:

> >

> >> How well is the scope balanced with everything that your are using for

> >> viewing, eyepieces, finder scope, etc.?

> >>

> >> The drift of the Sun is in what direction? Does it follow the RA buttons

> >> direction, or the Dec buttons?

> >>

> >> Regards,

> >> Robin

> >>

> >> Astro Accessories by Robin Casady

> >> Stainless Steel Weights & Dovetail Saddles

> >> www.CarmelCoast.com/Astro/sales.html

> >>

> >> Casady & Greene, Inc.

> >> www.casadyg.com

> >>

> >> On 9/1/01 5:15 PM lapides.family@... wrote:

> >>

> >>> Saturday, September 1, 2001

> >>> Dear Roland,

> >>> Thank you for your quick reply. Last week Wally helped me adjust my

> >>> backlash.

> >>> He tested this out with me after the adjustment by using the direction

> >>> buttons

> >>> when he was finished and everything seemed OK and worked properly, but they

> >>> may

> >>> have been tightened down to snugly (?) The arrow buttons do work properly.

> >>> Does

> >>> this indicate that the clutches are adjusted properly?

> >>> I tried using only one 9# weight at the very end of the counterweight bar,

> >>> but that was not enough weight. I use the heavy Naglers and the heavy 2" 4x

> >>> TeleVue Barlow along with the AP finder scope. In order to make enough room

> >>> for

> >>> the leveler, I put one 9# weight at the top of the counter-weight bar and

> >>> the

> >>> other 9# one near the bottom of the bar. Marj suggested this to me.

> >>> Previously

> >>> both 9# weights were about in the center of the bar, but this didn't alllow

> >>> room

> >>> for the level. I was trying to put level on top of the 2 weights, but

> >>> because

> >>> the diameters were slightly different the level would slope. I also tried

> >>> putting

> >>> on the top of just one weight.

> >>> I just rememnbered that I did receive the message "Motor Stall". I than

> >>> tried slewing to another object and mount worked as did the directional

> >>> buttons,

> >>> so I forgot about this "Motor Stall" message. I also checked the connections

> >>> and

> >>> plugs and they seemed to be OK.

> >>> For Venus tracking I was using my lowest power eyepiece (22mm or about

> >>> 35x).

> >>> For tracking the sun I was also using this same 22x. Both Venus and the Sun

> >>> immediately began to drift at 35x after they were acquired. I guessed that

> >>> the

> >>> motors were working properly since when I went to Venus it was dead on for

> >>> the

> >>> 3 times I tried it. If the clutches were slipping, I guessed it wouldn't

> >>> return

> >>> to the correct position each time - would it? As a matter of fact, each

> >>> time

> >>> Venus went out of the field of view I used the go to Venus command to skew

> >>> back

> >>> to Venus and it did return to dead center of the eyepiece.

> >>> The same problem with the sun, but drifting was slower since the diameter

> >>> is

> >>> so much larger. The sun went completely out of the 35x field of view within

> >>> 8-10

> >>> minutes or so. Venus was only able to stay in the field of view for about 2

> >>> minutes at 35x. You said that Venus does drift at high powers, but I used a

> >>> lower

> >>> 35x power. Even at 8x looking at Venus in the AP Right-Angle finder you can

> >>> visually see it traveling down the field of view in the finder scope. Venus

> >>> remains in the field of view much longer in the finder scope of course.

> >>> Any ideas? Do you think the recalibration problem I desccribed before

> >>> might

> >>> be causing the problem ?. Is there a problem with the recalibration

> >>> routine

> >>> based on my comments ? T hank you again for any help, or suggestions?

> >>> Sincerely, Richard Lapides in California

> >>>

> >>>

> >>>

> >>>

> >>>

> >>> chris1011@... wrote:

> >>>

> >>>> In a message dated 9/1/2001 4:04:35 PM Pacific Daylight Time,

> >>>> lapides.family@... writes:

> >>>>

> >>>>> Or is there another problem

> >>>>> that might be causing my mount's inability to track Venus or the Sun???

> >>>>

> >>>> Another thought, are your clutches tight? If the RA axis is not tight, and

> >>>> you have too much counterweight for the scope's weight (i.e. not in

> >>>> balance),

> >>>> then the clutch might be slipping. Another thing to check, is it tracking

> >>>> in

> >>>> Southern or northern hemisphere?

> >>>>

> >>>> Roland Christen

> >>>>

> >>>> [Non-text portions of this message have been removed]

> >>>>

> >>>> To UNSUBSCRIBE, or for general information on the ap-gto list

> >>>> see groups.yahoo.com/group/ap-gto

> >>>>

> >>>> Your use of Yahoo! Groups is subject to docs.yahoo.com/info/terms/

> >>>

> >>>

> >>>

> >>> To UNSUBSCRIBE, or for general information on the ap-gto list

> >>> see groups.yahoo.com/group/ap-gto

> >>>

> >>> Your use of Yahoo! Groups is subject to docs.yahoo.com/info/terms/

> >>>

> >>>

> >>

> >> To UNSUBSCRIBE, or for general information on the ap-gto list

> >> see groups.yahoo.com/group/ap-gto

> >>

> >> Your use of Yahoo! Groups is subject to docs.yahoo.com/info/terms/

> >

> >

> >

> > To UNSUBSCRIBE, or for general information on the ap-gto list

> > see groups.yahoo.com/group/ap-gto

> >

> > Your use of Yahoo! Groups is subject to docs.yahoo.com/info/terms/

> >

> >

>

> To UNSUBSCRIBE, or for general information on the ap-gto list

> see groups.yahoo.com/group/ap-gto

>

> Your use of Yahoo! Groups is subject to docs.yahoo.com/info/terms/







----------------------------

#3398 Sep 1, 2001

The buttons work at all speeds? That really is strange. If it were a

mechanical problem I wouldn't expect the buttons to work at slow speeds. Got

to be software, got to be software, got to...



You did check the N/S switch on the box as Roland suggested? You might flip

it south and back again, and/or try it set to south.



Regards,

Robin



Astro Accessories by Robin Casady

Stainless Steel Weights & Dovetail Saddles

www.CarmelCoast.com/Astro/sales.html



Casady & Greene, Inc.

www.casadyg.com





On 9/1/01 7:07 PM lapides.family@... wrote:



> Robin, I did try changing to Sol. and Side. rates but this had no effect, and

> the

> RA axis continues to not tract even though all four of the directional

> buttons all

> work. Also, the initial go to commands works and brings the object into

> dead-center

> of the eyepiece, when the drifting in the RA begins immediately. It seems like

> this

> a real mystery to me. I don't think I understand the inner workings of the

> mount to

> have any idea of what's going on that is wrong.

> Thanks for any thoughts you might have.

> Sincerely, Richard Lapides in California

>

>

>

>

> Robin Casady wrote:

>

>> What tracking rate is the mount set on? You might try changing to Solar,

>> Lunar, etc. to see if there is any difference.

>>

>> Regards,

>> Robin

>>

>> Astro Accessories by Robin Casady

>> Stainless Steel Weights & Dovetail Saddles

>> www.CarmelCoast.com/Astro/sales.html

>>

>> Casady & Greene, Inc.

>> www.casadyg.com

>>

>> On 9/1/01 6:39 PM lapides.family@... wrote:

>>

>>> Hi Robin,

>>> The sun drifts only down on the Right Ascencion axis only. There seems to

>>> be

>>> no

>>> tracking on the RA axis. I balanced and everything seems OK. This RA

>>> problem

>>> seems

>>> curious since all the directional buttons work. Also, when sun drifts out

>>> of

>>> field

>>> of view in 5 minutes, I have to issue the "Go To the sun" command and the

>>> sun

>>> returns to dead center of the finder and telescope. After I issue the

>>> command

>>> the RA

>>> axis moves to the correct location. Except -- the suns then immediately

>>> begins

>>> to

>>> drift out of the field of view again. It seems like the problem is with the

>>> RA

>>> axis. What do you think? Do you have any ideas of what I can do to get

>>> tracking on

>>> the RA axis?

>>> Thank You for any comments or suggestions you might give to me.

>>> Sincerely, Richard Lapides in California

>>>

>>>

>>>

>>>

>>>

>>> Robin Casady wrote:

>>>

>>>> How well is the scope balanced with everything that your are using for

>>>> viewing, eyepieces, finder scope, etc.?

>>>>

>>>> The drift of the Sun is in what direction? Does it follow the RA buttons

>>>> direction, or the Dec buttons?

>>>>

>>>> Regards,

>>>> Robin

>>>>

>>>> Astro Accessories by Robin Casady

>>>> Stainless Steel Weights & Dovetail Saddles

>>>> www.CarmelCoast.com/Astro/sales.html

>>>>

>>>> Casady & Greene, Inc.

>>>> www.casadyg.com

>>>>

>>>> On 9/1/01 5:15 PM lapides.family@... wrote:

>>>>

>>>>> Saturday, September 1, 2001

>>>>> Dear Roland,

>>>>> Thank you for your quick reply. Last week Wally helped me adjust my

>>>>> backlash.

>>>>> He tested this out with me after the adjustment by using the direction

>>>>> buttons

>>>>> when he was finished and everything seemed OK and worked properly, but

>>>>> they

>>>>> may

>>>>> have been tightened down to snugly (?) The arrow buttons do work

>>>>> properly.

>>>>> Does

>>>>> this indicate that the clutches are adjusted properly?

>>>>> I tried using only one 9# weight at the very end of the counterweight

>>>>> bar,

>>>>> but that was not enough weight. I use the heavy Naglers and the heavy 2"

>>>>> 4x

>>>>> TeleVue Barlow along with the AP finder scope. In order to make enough

>>>>> room

>>>>> for

>>>>> the leveler, I put one 9# weight at the top of the counter-weight bar and

>>>>> the

>>>>> other 9# one near the bottom of the bar. Marj suggested this to me.

>>>>> Previously

>>>>> both 9# weights were about in the center of the bar, but this didn't

>>>>> alllow

>>>>> room

>>>>> for the level. I was trying to put level on top of the 2 weights, but

>>>>> because

>>>>> the diameters were slightly different the level would slope. I also tried

>>>>> putting

>>>>> on the top of just one weight.

>>>>> I just rememnbered that I did receive the message "Motor Stall". I

>>>>> than

>>>>> tried slewing to another object and mount worked as did the directional

>>>>> buttons,

>>>>> so I forgot about this "Motor Stall" message. I also checked the

>>>>> connections

>>>>> and

>>>>> plugs and they seemed to be OK.

>>>>> For Venus tracking I was using my lowest power eyepiece (22mm or about

>>>>> 35x).

>>>>> For tracking the sun I was also using this same 22x. Both Venus and the

>>>>> Sun

>>>>> immediately began to drift at 35x after they were acquired. I guessed that

>>>>> the

>>>>> motors were working properly since when I went to Venus it was dead on for

>>>>> the

>>>>> 3 times I tried it. If the clutches were slipping, I guessed it wouldn't

>>>>> return

>>>>> to the correct position each time - would it? As a matter of fact, each

>>>>> time

>>>>> Venus went out of the field of view I used the go to Venus command to skew

>>>>> back

>>>>> to Venus and it did return to dead center of the eyepiece.

>>>>> The same problem with the sun, but drifting was slower since the

>>>>> diameter

>>>>> is

>>>>> so much larger. The sun went completely out of the 35x field of view

>>>>> within

>>>>> 8-10

>>>>> minutes or so. Venus was only able to stay in the field of view for about

>>>>> 2

>>>>> minutes at 35x. You said that Venus does drift at high powers, but I used

>>>>> a

>>>>> lower

>>>>> 35x power. Even at 8x looking at Venus in the AP Right-Angle finder you

>>>>> can

>>>>> visually see it traveling down the field of view in the finder scope.

>>>>> Venus

>>>>> remains in the field of view much longer in the finder scope of course.

>>>>> Any ideas? Do you think the recalibration problem I desccribed before

>>>>> might

>>>>> be causing the problem ?. Is there a problem with the recalibration

>>>>> routine

>>>>> based on my comments ? T hank you again for any help, or suggestions?

>>>>> Sincerely, Richard Lapides in California

>>>>>

>>>>>

>>>>>

>>>>>

>>>>>

>>>>> chris1011@... wrote:

>>>>>

>>>>>> In a message dated 9/1/2001 4:04:35 PM Pacific Daylight Time,

>>>>>> lapides.family@... writes:

>>>>>>

>>>>>>> Or is there another problem

>>>>>>> that might be causing my mount's inability to track Venus or the Sun???

>>>>>>

>>>>>> Another thought, are your clutches tight? If the RA axis is not tight,

>>>>>> and

>>>>>> you have too much counterweight for the scope's weight (i.e. not in

>>>>>> balance),

>>>>>> then the clutch might be slipping. Another thing to check, is it tracking

>>>>>> in

>>>>>> Southern or northern hemisphere?

>>>>>>

>>>>>> Roland Christen

>>>>>>

>>>>>> [Non-text portions of this message have been removed]

>>>>>>

>>>>>> To UNSUBSCRIBE, or for general information on the ap-gto list

>>>>>> see groups.yahoo.com/group/ap-gto

>>>>>>

>>>>>> Your use of Yahoo! Groups is subject to docs.yahoo.com/info/terms/

>>>>>

>>>>>

>>>>>

>>>>> To UNSUBSCRIBE, or for general information on the ap-gto list

>>>>> see groups.yahoo.com/group/ap-gto

>>>>>

>>>>> Your use of Yahoo! Groups is subject to docs.yahoo.com/info/terms/

>>>>>

>>>>>

>>>>

>>>> To UNSUBSCRIBE, or for general information on the ap-gto list

>>>> see groups.yahoo.com/group/ap-gto

>>>>

>>>> Your use of Yahoo! Groups is subject to docs.yahoo.com/info/terms/

>>>

>>>

>>>

>>> To UNSUBSCRIBE, or for general information on the ap-gto list

>>> see groups.yahoo.com/group/ap-gto

>>>

>>> Your use of Yahoo! Groups is subject to docs.yahoo.com/info/terms/

>>>

>>>

>>

>> To UNSUBSCRIBE, or for general information on the ap-gto list

>> see groups.yahoo.com/group/ap-gto

>>

>> Your use of Yahoo! Groups is subject to docs.yahoo.com/info/terms/

>

>

>

> To UNSUBSCRIBE, or for general information on the ap-gto list

> see groups.yahoo.com/group/ap-gto

>

> Your use of Yahoo! Groups is subject to docs.yahoo.com/info/terms/

>

>







----------------------------

#4345 Feb 16 1:51 PM

My 2 year old 600E GOTO mount has developed a small "stalling

problem".



When fully loaded with 9.25" SCT and ST-7E CCD with focal reducer and

losmandy plate plus sliding plate counterweight the 600E sometimes

"stalls" at certain position angles. When this happens the scope is

pointing at a fairly high angle (not straight up) and near the

merdian. The yellow light comes on and the CCD images are trailed. Yet

the "Status" button indicates everything is working normally (no

statement of a "stalled motor"). I can slew to another region of the

sky and the red light pops on and the scope has not "lost" its

position (not very much anyway).



I've checked the scope's balance on the mount and it is good. The

scope slews fine and the motors don't sound any different from when I

first got the mount. I can get a 90 second unguided shot 80% of the

time and the mount is fine when not pointing at these higher angles.



I have to set the mount and scope up and take down for every observing

session.



Will lubricating the gears help? And how does one do this?



Not a big deal but inquiring minds want to know.



Chris. Spratt

642



----------------------------

#4346 Feb 16 2:25 PM

Has anything changed recently ?





cspratt2001 wrote: >

> My 2 year old 600E GOTO mount has developed a small "stalling

> problem".

>

> When fully loaded with 9.25" SCT and ST-7E CCD with focal reducer and

> losmandy plate plus sliding plate counterweight the 600E sometimes

> "stalls" at certain position angles. When this happens the scope is

> pointing at a fairly high angle (not straight up) and near the

> merdian. The yellow light comes on and the CCD images are trailed. Yet

> the "Status" button indicates everything is working normally (no

> statement of a "stalled motor"). I can slew to another region of the

> sky and the red light pops on and the scope has not "lost" its

> position (not very much anyway).

>

> I've checked the scope's balance on the mount and it is good. The

> scope slews fine and the motors don't sound any different from when I

> first got the mount. I can get a 90 second unguided shot 80% of the

> time and the mount is fine when not pointing at these higher angles.

>

> I have to set the mount and scope up and take down for every observing

> session.

>

> Will lubricating the gears help? And how does one do this?

>

> Not a big deal but inquiring minds want to know.

>

> Chris. Spratt

> 642

>

> To UNSUBSCRIBE, or for general information on the ap-gto list

> see groups.yahoo.com/group/ap-gto

>

> Your use of Yahoo! Groups is subject to docs.yahoo.com/info/terms/



----------------------------

#4347 Feb 16 2:44 PM

The weather :-) (Second use of scope this month!!!!)

--- In ap-gto@y..., "Lawrence D. Lopez" lopez@m...> wrote:

> Has anything changed recently ?

>

>

> cspratt2001 wrote:

> >

> > My 2 year old 600E GOTO mount has developed a small "stalling

> > problem".

> >

> > When fully loaded with 9.25" SCT and ST-7E CCD with focal reducer

and

> > losmandy plate plus sliding plate counterweight the 600E sometimes

> > "stalls" at certain position angles. When this happens the scope

is

> > pointing at a fairly high angle (not straight up) and near the

> > merdian. The yellow light comes on and the CCD images are trailed.

Yet

> > the "Status" button indicates everything is working normally (no

> > statement of a "stalled motor"). I can slew to another region of

the

> > sky and the red light pops on and the scope has not "lost" its

> > position (not very much anyway).

> >

> > I've checked the scope's balance on the mount and it is good. The

> > scope slews fine and the motors don't sound any different from

when I

> > first got the mount. I can get a 90 second unguided shot 80% of

the

> > time and the mount is fine when not pointing at these higher

angles.

> >

> > I have to set the mount and scope up and take down for every

observing

> > session.

> >

> > Will lubricating the gears help? And how does one do this?

> >

> > Not a big deal but inquiring minds want to know.

> >

> > Chris. Spratt

> > 642

> >

> > To UNSUBSCRIBE, or for general information on the ap-gto list

> > see groups.yahoo.com/group/ap-gto

> >

> > Your use of Yahoo! Groups is subject to

docs.yahoo.com/info/terms/



----------------------------

#4360 Feb 18 10:04 AM

In a message dated 2/16/2002 1:58:55 PM Pacific Standard Time,

cspratt@... writes:



> When fully loaded with 9.25" SCT and ST-7E CCD with focal reducer and

> losmandy plate plus sliding plate counterweight the 600E sometimes

> "stalls" at certain position angles



The RA motor has a built-in current limit circuit to prevent motor winding

burnout. The current is limited to approx. 1 amp, and when that is exceeded,

the servo drive will shut that motor off. Position error will not be lost,

but tracking will cease. The primary cause is too much load on the motor,

which can be the result of overtightening the worm mesh, aggravated by

excessive weight on the mount. Try backing off the RA worm mesh a tiny bit to

see if that clears up the problem. Don't worry about a tiny bit of backlash

in RA, since this does not in any way affect the tracking or guiding accuracy

of the mount.



Roland Christen





[Non-text portions of this message have been removed]







----------------------------

#26260 Nov 20, 2009

I have just bought a 600E in pristine condition and I have a few questions.

How is the accuracy of the RA drive train? I haven't been able to find any references to this.

What would be the best way to get decent GOTO when you are in the field?

I understand that there is no modeling capabilities but would the polar scope alignment be good enough? If not, would getting tpoint allow quick set up?

I used to image with a 5" f/8 Starfire on a G11, and usually the polar alignment scope allowed 45 minutes guided shots with no field rotation. It was not goto though.



One other thing, is there a way to search here? It seems any search will only display the first page of results.



Thanks!



----------------------------

#26284 Nov 23, 2009

Nobody know?



--- In ap-gto@yahoogroups.com, "tomb1818" tomb1818@...> wrote:

>

> I have just bought a 600E in pristine condition and I have a few questions.

> How is the accuracy of the RA drive train? I haven't been able to find any references to this.

> What would be the best way to get decent GOTO when you are in the field?

> I understand that there is no modeling capabilities but would the polar scope alignment be good enough? If not, would getting tpoint allow quick set up?

> I used to image with a 5" f/8 Starfire on a G11, and usually the polar alignment scope allowed 45 minutes guided shots with no field rotation. It was not goto though.

>

> One other thing, is there a way to search here? It seems any search will only display the first page of results.

>

> Thanks!

>



----------------------------

#26304 Nov 24, 2009

Hi Jeff,

Do you just set it up with the polar scope and start using it? Or do you do a 2 star alignment?



Thanks

--- In ap-gto@yahoogroups.com, Jeff Young jey@...> wrote:

>

> Tom --

>

> Well, I don't image, so I can't answer many of your questions. But I do use GoTo, and aligning via the polar scope works fine for that.

>

> -- Jeff.

>

>

> From: ap-gto@yahoogroups.com [mailto:ap-gto@yahoogroups.com] On Behalf Of tomb1818

> Sent: Tuesday, November 24, 2009 3:22 AM

> To: ap-gto@yahoogroups.com

> Subject: [ap-gto] Re: "New" AP 600E Gotocp2

>

>

>

> Nobody know?

>

> --- In ap-gto@yahoogroups.commailto:ap-gto%40yahoogroups.com>, "tomb1818" tomb1818@> wrote:

> >

> > I have just bought a 600E in pristine condition and I have a few questions.

> > How is the accuracy of the RA drive train? I haven't been able to find any references to this.

> > What would be the best way to get decent GOTO when you are in the field?

> > I understand that there is no modeling capabilities but would the polar scope alignment be good enough? If not, would getting tpoint allow quick set up?

> > I used to image with a 5" f/8 Starfire on a G11, and usually the polar alignment scope allowed 45 minutes guided shots with no field rotation. It was not goto though.

> >

> > One other thing, is there a way to search here? It seems any search will only display the first page of results.

> >

> > Thanks!

> >

>

>

>

> [Non-text portions of this message have been removed]

>



----------------------------

#26319 Nov 27, 2009

Tom --



If I'm viewing the planets (and only need tracking), I don't even bother to align it. I just make sure Polaris is somewhere in the polar scope's field.



For deepsky (where I'm using GoTo), I just align it with the polarscope. Then I put it in Park position 1 (with a cheap and cheerful bubble level), GoTo a bright star, and do a rcal on it.



-- Jeff.





From: ap-gto@yahoogroups.com [mailto:ap-gto@yahoogroups.com] On Behalf Of tomb1818

Sent: Wednesday, November 25, 2009 3:21 AM

To: ap-gto@yahoogroups.com

Subject: [ap-gto] Re: "New" AP 600E Gotocp2







Hi Jeff,

Do you just set it up with the polar scope and start using it? Or do you do a 2 star alignment?



Thanks

--- In ap-gto@yahoogroups.commailto:ap-gto%40yahoogroups.com>, Jeff Young jey@...> wrote:

>

> Tom --

>

> Well, I don't image, so I can't answer many of your questions. But I do use GoTo, and aligning via the polar scope works fine for that.

>

> -- Jeff.

>

>

> From: ap-gto@yahoogroups.commailto:ap-gto%40yahoogroups.com> [mailto:ap-gto@yahoogroups.commailto:ap-gto%40yahoogroups.com>] On Behalf Of tomb1818

> Sent: Tuesday, November 24, 2009 3:22 AM

> To: ap-gto@yahoogroups.commailto:ap-gto%40yahoogroups.com>

> Subject: [ap-gto] Re: "New" AP 600E Gotocp2

>

>

>

> Nobody know?

>

> --- In ap-gto@yahoogroups.commailto:ap-gto%40yahoogroups.com>mailto:ap-gto%40yahoogroups.com>, "tomb1818" tomb1818@> wrote:

> >

> > I have just bought a 600E in pristine condition and I have a few questions.

> > How is the accuracy of the RA drive train? I haven't been able to find any references to this.

> > What would be the best way to get decent GOTO when you are in the field?

> > I understand that there is no modeling capabilities but would the polar scope alignment be good enough? If not, would getting tpoint allow quick set up?

> > I used to image with a 5" f/8 Starfire on a G11, and usually the polar alignment scope allowed 45 minutes guided shots with no field rotation. It was not goto though.

> >

> > One other thing, is there a way to search here? It seems any search will only display the first page of results.

> >

> > Thanks!

> >

>

>

>

> [Non-text portions of this message have been removed]

>







[Non-text portions of this message have been removed]







----------------------------

#26326 Nov 27, 2009

That's sort of what I thought.

I guess many of the people here need sub-minute pointing accuracy...but who can blame them! They bought the best after all!



I guess though, ultimately, I will need to get the alignment quite good. I plan on imaging with a STL11000 and a fsq106. Quite wide field, and the exposures will be pretty long in h alpha. Thus I will need to keep the rotation pretty low.



--- In ap-gto@yahoogroups.com, Jeff Young jey@...> wrote:

>

> Tom --

>

> If I'm viewing the planets (and only need tracking), I don't even bother to align it. I just make sure Polaris is somewhere in the polar scope's field.

>

> For deepsky (where I'm using GoTo), I just align it with the polarscope. Then I put it in Park position 1 (with a cheap and cheerful bubble level), GoTo a bright star, and do a rcal on it.

>

> -- Jeff.

>

>

> From: ap-gto@yahoogroups.com [mailto:ap-gto@yahoogroups.com] On Behalf Of tomb1818

> Sent: Wednesday, November 25, 2009 3:21 AM

> To: ap-gto@yahoogroups.com

> Subject: [ap-gto] Re: "New" AP 600E Gotocp2

>

>

>

> Hi Jeff,

> Do you just set it up with the polar scope and start using it? Or do you do a 2 star alignment?

>

> Thanks

>

> --- In ap-gto@yahoogroups.commailto:ap-gto%40yahoogroups.com>, Jeff Young jey@> wrote:

> >

> > Tom --

> >

> > Well, I don't image, so I can't answer many of your questions. But I do use GoTo, and aligning via the polar scope works fine for that.

> >

> > -- Jeff.

> >

> >

> > From: ap-gto@yahoogroups.commailto:ap-gto%40yahoogroups.com> [mailto:ap-gto@yahoogroups.commailto:ap-gto%40yahoogroups.com>] On Behalf Of tomb1818

> > Sent: Tuesday, November 24, 2009 3:22 AM

> > To: ap-gto@yahoogroups.commailto:ap-gto%40yahoogroups.com>

> > Subject: [ap-gto] Re: "New" AP 600E Gotocp2

> >

> >

> >

> > Nobody know?

> >

> > --- In ap-gto@yahoogroups.commailto:ap-gto%40yahoogroups.com>mailto:ap-gto%40yahoogroups.com>, "tomb1818" tomb1818@> wrote:

> > >

> > > I have just bought a 600E in pristine condition and I have a few questions.

> > > How is the accuracy of the RA drive train? I haven't been able to find any references to this.

> > > What would be the best way to get decent GOTO when you are in the field?

> > > I understand that there is no modeling capabilities but would the polar scope alignment be good enough? If not, would getting tpoint allow quick set up?

> > > I used to image with a 5" f/8 Starfire on a G11, and usually the polar alignment scope allowed 45 minutes guided shots with no field rotation. It was not goto though.

> > >

> > > One other thing, is there a way to search here? It seems any search will only display the first page of results.

> > >

> > > Thanks!

> > >

> >

> >

> >

> > [Non-text portions of this message have been removed]

> >

>

>

>

> [Non-text portions of this message have been removed]

>



----------------------------

#49539 Nov 16, 2015

Hi,After a long pause I am now back into using my scope. ��One reason is that I have a permanent installation on a nice pier so setup is instantaneous. ��So I am now in the process of adjusting everything for imaging.This is the setup:AP600e GOTO on a Paramount MX permanent pier (Solid!).Takahashi FSQ106��Sbig STL11000 camera

The above gives 3.6 arcsec / pixel on the camera. ��Should be easy...��The mount is only polar aligned with a polar scope for the moment but can give 5 minute unguided exposures with little field rotation or opbvious tracking errors.

So I did a 15 minute image with the scope on the west of the meridian pointing east and the RMS tracking error was 0.16 pixels. ��Seeing was the best I ever saw that night.I slew the scope further to the south and tried again. ��Try as I could, I could not get the mount to calibrate at all. ��It seemed that corrections were large and when the correction stopped, the next image actually showed that the stars were still moving.This is using CCDSoft and a guiding rate of 1x.So I'm not sure what is going on here.The scope is balanced but I really can't tell if it is or not since it can take quite a movement of the weights to actually make it look unbalanced. ��Now I have heard that a scope should be balanced so that when the counterweight is on the east of the meridian then that side should be heavier.But what happens when you then image on the other side of the meridian??? Does one need to adjust the weights to make the scope heavier then?So please help out a newbie here. ��Thanks, Tom��



----------------------------

#49541 Nov 16, 2015

I slew the scope further to the south and tried again. ��Try as I could, I could not get the mount to calibrate at all. ��It seemed that corrections were large and when the correction stopped, the next image actually showed that the stars were still moving.

��Not sure what��this means. I would assume that you did a calibration run in CCDsoft, which should have applied to everywhere else in the sky. Not really a need for another calibration run when going to different parts of the sky.��So, to clarify, the mount kept moving after a calibration run? Or did it keep moving after a slew to the new position, or did it keep moving after a correction signal via CCDsoft? And which axis kept moving? Can you tell which direction it was moving - to the East or to the West or N-S?��Rolando��-----Original Message-----

From: tom_b@... [ap-gto] ap-gto@yahoogroups.com>

To: ap-gto ap-gto@yahoogroups.com>

Sent: Mon, Nov 16, 2015 2:32 pm

Subject: [ap-gto] Tracking issues with an AP600e Goto





Hi,After a long pause I am now back into using my scope. ��One reason is that I have a permanent installation on a nice pier so setup is instantaneous. ��So I am now in the process of adjusting everything for imaging.This is the setup:AP600e GOTO on a Paramount MX permanent pier (Solid!).Takahashi FSQ106��Sbig STL11000 camera



The above gives 3.6 arcsec / pixel on the camera. ��Should be easy...��The mount is only polar aligned with a polar scope for the moment but can give 5 minute unguided exposures with little field rotation or opbvious tracking errors.



So I did a 15 minute image with the scope on the west of the meridian pointing east and the RMS tracking error was 0.16 pixels. ��Seeing was the best I ever saw that night.I slew the scope further to the south and tried again. ��Try as I could, I could not get the mount to calibrate at all. ��It seemed that corrections were large and when the correction stopped, the next image actually showed that the stars were still moving.This is using CCDSoft and a guiding rate of 1x.So I'm not sure what is going on here.The scope is balanced but I really can't tell if it is or not since it can take quite a movement of the weights to actually make it look unbalanced. ��Now I have heard that a scope should be balanced so that when the counterweight is on the east of the meridian then that side should be heavier.But what happens when you then image on the other side of the meridian??? Does one need to adjust the weights to make the scope heavier then?So please help out a newbie here. ��Thanks, Tom��







----------------------------

#49544 Nov 16, 2015

Hi,Nope, can't move it at all with the clutches engaged.



----------------------------

#49545 Nov 16, 2015

Hi,Yes, I did a calibration run in CCDSoft. ��The first one I did was fantastic, the star moved just perfectly in both directions and then the tracking was great.The second time I did one, was where everything seemed to become unstable. ��I kept getting errors but when the next exposure was taken, the stars all were trails. ��I think they were in the DEC but I can't say for sure.I am going to try again tonight.On the other hand, now that I think of it, I was running Microsofts Worldwide telescope the second time and it was tracking the mount. ��Perhaps there is something there...you cannot slew in that application unless you turn tracking off. ��Maybe there is some interaction there that is causing what I am seeing. I'll try again tonight with just CCDSoft.Just a question, can this mount track through the meridian?Thanks, Tom



----------------------------

#49547 Nov 16, 2015

External software can interfere with proper tracking and guiding. Especially if it tells the mount to turn off tracking. ��Here's a hint: once you have a good calibration run, don't do it again. If the scope focal length did not change and if the camera is placed in the same orientation, then you never ever need to do another calibration run. All that the cal run does is inform the guiding software how far and in which direction the star moves when move commands are given. It does not depend on whether it is Thursday or it is warm out or what year it is. Or even if you have good or not so good polar alignment. None of these affect the actual calibration numbers one bit - as long as the scope and camera orientation has not been changed significantly.��And finally, yes all our mounts that run with the CP controllers will guide or track thru the meridian. The keypad allows you to choose the meridian flip point, so you can start on the wrong side and continue tracking all the way to the western horizon. Just make sure that the scope will clear the pier when on the wrong side.��Rolando����-----Original Message-----

From: tom_b@... [ap-gto] ap-gto@yahoogroups.com>

To: ap-gto ap-gto@yahoogroups.com>

Sent: Mon, Nov 16, 2015 3:33 pm

Subject: Re: [ap-gto] Tracking issues with an AP600e Goto





Hi,Yes, I did a calibration run in CCDSoft. ��The first one I did was fantastic, the star moved just perfectly in both directions and then the tracking was great.The second time I did one, was where everything seemed to become unstable. ��I kept getting errors but when the next exposure was taken, the stars all were trails. ��I think they were in the DEC but I can't say for sure.I am going to try again tonight.On the other hand, now that I think of it, I was running Microsofts Worldwide telescope the second time and it was tracking the mount. ��Perhaps there is something there...you cannot slew in that application unless you turn tracking off. ��Maybe there is some interaction there that is causing what I am seeing. I'll try again tonight with just CCDSoft.Just a question, can this mount track through the meridian?Thanks, Tom



----------------------------

#49552 Nov 17, 2015

Now, I can reproduce this manually. ��In the autoguide screen of CCDSoft there are the N,S,W,E buttons to move the scope. If I press on the E button and take an image, the mount is still moving. ��At this point if I do "Take image" again, it is still moving! and again! ��Then it stops.

��This happens only if you have set the button rate at 12x. It will not happen at 1x. Check your button rate. Some external software is setting the guide rate at 12x. The keypad does not reflect this since it does not communicate with the outside software that is changing your button rate. Remove all external software except your guiding software until you can figure out what is happening.��Rolando��-----Original Message-----

From: tom_b@... [ap-gto] ap-gto@yahoogroups.com>

To: ap-gto ap-gto@yahoogroups.com>

Sent: Tue, Nov 17, 2015 8:19 am

Subject: Re: [ap-gto] Tracking issues with an AP600e Goto





Hi,So I spent some quality time with the mount last night...The first thing I did is to try the autotracking. ��I couldn't ask for better performance. ��In CCDSoft, the error reported was 0.2 pixels max over a 20 minute guided exposure. ��So I figured this must have been a software issue.Next I ran pempro to do a polar alignment. ��That took the better part of 4 hours..It seemed that I either overshot one axis or the other. ��After struggling with this it seems that the best I could do was a drift over 5 minutes of 40 arcsec in azimuth and 15 arcsec in altitude (yes arcseconds). ��This seems to allow me to do a 10 minute unguided shot without a problem.I then did a pempro ��PE analysis on the mount. ��The results were spectacular, and error of 1.8 / 1.1 arcseconds. ��This was reproducable.However, I then wanted to start using the mount for an image. ��So I slewed to an object and tried to turn on autoguiding. ��Well it picked up the star fine but after the first correction the star was gone.So I did a recalibration and it was now impossible to recalibrate the software. ��What happened was this: The N, S, W movements were perfect. ��The star image afterwards showed that it moved perfectly in the initial move and the return. ��The E movement was another story!When CCDSoft takes an image after moving, the stars are long trails. ��It seems that in the E direction the mount keeps moving after the correction is sent.Now, I can reproduce this manually. ��In the autoguide screen of CCDSoft there are the N,S,W,E buttons to move the scope. If I press on the E button and take an image, the mount is still moving. ��At this point if I do "Take image" again, it is still moving! and again! ��Then it stops.So it seems like the mount is getting the command to move and it is then taking 8 seconds or so to complete it, and we are talking a small amount of movement.Now get this. ��I went and slewed the scope around randomly for about a minute and then tried to calibrate again. ��This time it was perfect! ��So for the next 40 minute all was well, then I went to bed.So, where do I go from here?Thanks







----------------------------

#49554 Nov 17, 2015

Hi,I made it ��point last night that only CCDSoft and the AP V2 ascom driver were running. ��SO the first autoguiding run was fantastic.��However, the error seemed to happen after PEMPRO was active, even though it was shut down. ��Perhaps Pempro set the rate at something and then it was not reset by CCDSoft?Can I rule out a mechanical issue? ��Since it is only in one direction, would not a mechanical issue affect both directions?Thanks, Tom



----------------------------

#49555 Nov 17, 2015

It is definitely not a mechanical issue. When you are troubleshooting an error in the system, make it as simple as possible at first. Then start layering other software until the problem surfaces. ��Whenever I am guiding, I make sure that I don't have any other software in the loop that is sending instructions to the mount. I try to keep things as simple as possible. I'm not sure why PEMPro would have sent any commands to the mount but it is possible for external software to override CCDSoft commands, so I would close down any software that is not needed for autoguiding.��Rolando����-----Original Message-----

From: tom_b@... [ap-gto] ap-gto@yahoogroups.com>

To: ap-gto ap-gto@yahoogroups.com>

Sent: Tue, Nov 17, 2015 11:25 am

Subject: Re: [ap-gto] Tracking issues with an AP600e Goto





Hi,I made it ��point last night that only CCDSoft and the AP V2 ascom driver were running. ��SO the first autoguiding run was fantastic.��However, the error seemed to happen after PEMPRO was active, even though it was shut down. ��Perhaps Pempro set the rate at something and then it was not reset by CCDSoft?Can I rule out a mechanical issue? ��Since it is only in one direction, would not a mechanical issue affect both directions?Thanks, Tom



----------------------------

#49556 Nov 17, 2015

Hi, Ok will do so tonight....another nice evening over here. ��I asked Ray about the pempro issue on an unrelated thread at CCDWare. ��It was closed but I did not disconnect from the camera or mount.If I see an issue, I'll try and enable logging to track this down.Thanks for your help and for a really excellent example of an AP600e!Tom



----------------------------

#50169 Jan 4, 2016

Oh, I should mention, I had the problem before where it seemed that the motors did not stop after a calibration but it was +15C at the time.



----------------------------

#50178 Jan 5, 2016

Hi

"I was imaging the horse head andit is as if Alnitak was the north pole and everything else was revolvingaround it!. "

That would indicate you were severlymisaligned on the pole and guided on a star close to Alnitak. What youdescribe is classic field rotation.

CS

Pawel Lancucki



----------------------------

#50187 Jan 5, 2016

Ha, was a late night....the camera which has a rotator, was caught on frozen cables and rotating!



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