Re: [ap-gto] 1600 GTO + AP portable pier vibration dampening?


Jun 25, 1999

 


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

#24 Jun 25, 1999

Ok, here is a question for the group. I just ordered a 10" Meade SCT OTA and the proper AP mounting plates . I plan on using the 600 GTO mount with this scope.

Now will I have a problem or is there anything I should be aware of when going thru the polar alignment process????

Also someone in the group uses a C11 and a C 9.25 with the AP mount...any problems that are different when you use your refractors.????

Thanks for the comments.

Howard Lazarus





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

#25 Jun 26, 1999

I'd be interested, also. I haven't tried my C-11 on the mount yet (Losmandy

plates), but will post a note when I have done so. We lost two critical

employees at work, so I probably won't have time to mess with it until after

July 12.





Regards,

Paul Gustafson

> -----Original Message-----

> From: lazhow@... [mailto:lazhow@...]

> Sent: Friday, June 25, 1999 8:09 PM

> To: ap-gto@egroups.com

> Subject: [ap-gto] AP 600 GTO MOUNT with Meade 10" SCT

>

>

> Ok, here is a question for the group. I just ordered a 10" Meade

> SCT OTA and the proper AP mounting plates . I plan on using the

> 600 GTO mount with this scope.

> Now will I have a problem or is there anything I should be aware

> of when going thru the polar alignment process????

> Also someone in the group uses a C11 and a C 9.25 with the AP

> mount...any problems that are different when you use your refractors.????

> Thanks for the comments.

> Howard Lazarus

>

>

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

#103 Aug 11, 1999

Hi all -



I have a 600 GTO with the wooden tripod on order with AP (not due until spring,

unfortunately). Initially I will use my Traveler on this (I know the 600 is

overkill), but I plan to eventually acquire an SCT -- of course I might just

succumb and buy one ahead of the 600's arrival.



I do have a quick question for the group. What have you experienced in the way

of SCT capacity for the 600 GTO, particularly when doing any kind of imaging? I

am assuming that an 8" will be fine; will the 600 work with the Celestron 9

1/2"? Is a larger SCT out of the question?



Also, for visual work how large an SCT would be workable?



Thanks for any input and best regards,



Paul Schroeder



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

#104 Aug 11, 1999

Paul_Schroeder@... wrote:

> Hi all -

>

> I have a 600 GTO with the wooden tripod on order with AP (not due until spring,

> unfortunately). Initially I will use my Traveler on this (I know the 600 is

> overkill), but I plan to eventually acquire an SCT -- of course I might just

> succumb and buy one ahead of the 600's arrival.

>

> I do have a quick question for the group. What have you experienced in the way

> of SCT capacity for the 600 GTO, particularly when doing any kind of imaging? I



Hi,



I currently image with a C11 on an AP600 mount. It is workable with three counter-

weights and a dovetail plate, but I've ordered an AP900 for greater stability. A big



reason for this is that I use a fairly heavy camera (ST7) and a very heavy flip

mirror

(Van Slyke Slider).



For visualy, I think it's great, but I do recommend getting three counterweights.



Bob Kuberek



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

#105 Aug 11, 1999

I have a 600 GTO with the wooden tripod on order with AP (not due until

>spring,

>unfortunately). Initially I will use my Traveler on this (I know the 600 is

>overkill), but I plan to eventually acquire an SCT -- of course I might just

>succumb and buy one ahead of the 600's arrival.

>

>I do have a quick question for the group. What have you experienced in

>the way

>of SCT capacity for the 600 GTO, particularly when doing any kind of

>imaging? I

>am assuming that an 8" will be fine; will the 600 work with the Celestron 9

>1/2"? Is a larger SCT out of the question?

>

>Also, for visual work how large an SCT would be workable?

>

>Thanks for any input and best regards,

>

>Paul Schroeder







Hi Paul,



Put your 600 on one of A-P's portable piers, and you'll greatly increase

it's load capacity concerning small tremors - as with photography. It's not

so much that it can hold more weight with the pier, it's that the vibration

is significantly diminished, as well as an increase in wind resistance.

People have put a C9.25 on a 400 mount on a pier succesfully for

photographic purposes - a C11 on a 600/pier should be fine, and more

portable than a 900.



Clear Skies,



John







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

#106 Aug 11, 1999

John Mensick wrote:

>

> Hi Paul,

>

> Put your 600 on one of A-P's portable piers, and you'll greatly increase

> it's load capacity concerning small tremors - as with photography. It's not

> so much that it can hold more weight with the pier, it's that the vibration

> is significantly diminished, as well as an increase in wind resistance.

> People have put a C9.25 on a 400 mount on a pier succesfully for

> photographic purposes - a C11 on a 600/pier should be fine, and more

> portable than a 900.



Just to clarify my earlier response, the C11 works fine on the AP600. However,

it doesn't quite balance in DEC with all my imaging stuff hanging off the back.

The

pier is a great idea, though.



Bob Kuberek



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

#107 Aug 12, 1999

Hi Paul;



Ofcourse not always possible, I have a astro pier which does make a big difference.

Using a AP 600 mount I have the AP 130mm and also the Meade 10". I use the special

dovetail plate supplied by AP and the sliding plate supplied by Losmandy all of

which you can get directly from AP.

The wood tripod will not give you the results you may seek in the future and would

consider AP 6" 48" pier...easy to setup but not as pretty as the wood tripod...or if

you have a spot that you can use frequently nothing would beat the permanent astro

pier.

LASTLY, AP SERVICE IS OUTSTANDING..CALL MARJ OR CHRISTINE, TELL THEM YOUR PLAN AND

THEY WILL GUIDE YOU. IF THEY FEEL THE AP 600 WILL NOT HANDLE YOUR NEEDS YOU CAN BE

ASSURED THE HONEST AND CORRECT ANSWERS WILL BE SUPPLIED TO YOU.

Have fun and hope you get you setup shortly...it only took 8 months for me to get my

600.

Howard Lazarus



Paul_Schroeder@... wrote:

> Hi all -

>

> I have a 600 GTO with the wooden tripod on order with AP (not due until spring,

> unfortunately). Initially I will use my Traveler on this (I know the 600 is

> overkill), but I plan to eventually acquire an SCT -- of course I might just

> succumb and buy one ahead of the 600's arrival.

>

> I do have a quick question for the group. What have you experienced in the way

> of SCT capacity for the 600 GTO, particularly when doing any kind of imaging? I

> am assuming that an 8" will be fine; will the 600 work with the Celestron 9

> 1/2"? Is a larger SCT out of the question?

>

> Also, for visual work how large an SCT would be workable?

>

> Thanks for any input and best regards,

>

> Paul Schroeder

>

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

#111 Aug 15, 1999

Or, attach the 600 mount ring to a Losmady semi-pier and tripod

for the G11.



Rich



>Hi Paul,

>

>Put your 600 on one of A-P's portable piers, and you'll greatly increase

>it's load capacity concerning small tremors - as with photography. It's not

>so much that it can hold more weight with the pier, it's that the vibration

>is significantly diminished, as well as an increase in wind resistance.

>People have put a C9.25 on a 400 mount on a pier succesfully for

>photographic purposes - a C11 on a 600/pier should be fine, and more

>portable than a 900.

>

>Clear Skies,

>

>John

>

>

>

>

>

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

#307 Feb 29 6:27 PM

While waiting for our Biblical sequence of rain

storms to pass here in the San Francisco Bay area I've

taken to idle speculations...



Anyone care to speculate why the 600 series mount is

is rated to carry a SCT size of 10 inches max where as

the Losmandy G11, which is not that much different in

size, routinely carries C14's ?



Lets limit the discussion to visual applications only.



*sigh* back to polishing my counter weights...



-Doug



USPS: Douglas W. Forehand INTERNET: dwf@...

Sun Microsystems Inc. VOICE: (408) 774-8015

901 San Antonio Road, MS USUN02-101 FAX: (408) 774-2098

Palo Alto, California 94303-4900



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

#308 Feb 29 6:52 PM

"Douglas W. Forehand" wrote: >

> Anyone care to speculate why the 600 series mount is

> is rated to carry a SCT size of 10 inches max where as

> the Losmandy G11, which is not that much different in

> size, routinely carries C14's ?

>

> Lets limit the discussion to visual applications only.



Hi Doug:



Here are the specs, although it is hard to compare since two

manufacturers may rate their mounts differently.



Eq. Head wt..Rating



Losmandy GM-8.21#..30# ?8" SCT

AP 400..21#..? 8" SCT

AP 600..27#..? 10" SCT

Losmandy G-11.36#..60#

AP 900..40#..70#

AP 1200..91#..140#

HGM 200..97#..150#



The G-11 is a pretty hefty mount, closer to the 900 in size.



Derek







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

#310 Feb 29 10:46 PM

A C14 on a G11 mount is quite stable for visual use.



Rich



>Hi everyone;

>

>I think that ratings such as this are to be taken with the proverbial

>grain of salt. They are really just guidelines. People differ in the

>priorities they assign to minimizing weight and cost on the one hand,

>versus greater stability on the other. Manufacturers rarely state the

>criteria they use in their ratings. One European manufacturer goes

>assigning weight capacities for different telescope weight and tube

>length combinations. Company 7 sells the Losmandy G-11/Celestron 11 as

>a combined package and suggests a C-11 is the maximum this mount can

>handle effectively. They say this combination may be on light side for

>Astro-photography. Nonetheless, many people have taken great images

>with this setup. I used to own a Losmandy GM-100, which was the G-11's

>predecessor. Even though the GM-100 was more robust than the current

>G-11, I think a C-14 would have been too much for it.

>

>doug.forehan-@...> wrote:

>

>original article:www.egroups.com/group/ap-gto/?start=307

>> Anyone care to speculate why the 600 series mount is

>> is rated to carry a SCT size of 10 inches max where as

>> the Losmandy G11, which is not that much different in

>> size, routinely carries C14's ?

>>

>

>

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

#312 Mar 1, 2000

No way, the 900 GTO is much much larger then the G11. I have owned both

mounts and I would put the G11 at the 600E size, Definatly not in the same

league as the 900 gto. I have owner both mounts and have used the same size

scope on them and the 900 is significantly more stable and load capacity and

in every way more then the G11....though the 600E and the G11 (while I would

lean on the 600E greater) is a much more reasonable comparison.



charles

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

From: Derek Wong dawong@...>

To: ap-gto@egroups.com>

Sent: Tuesday, February 29, 2000 9:52 PM

Subject: [ap-gto] Re: 600 GTO payload capacity





> "Douglas W. Forehand" wrote:

> >

> > Anyone care to speculate why the 600 series mount is

> > is rated to carry a SCT size of 10 inches max where as

> > the Losmandy G11, which is not that much different in

> > size, routinely carries C14's ?

> >

> > Lets limit the discussion to visual applications only.

>

> Hi Doug:

>

> Here are the specs, although it is hard to compare since two

> manufacturers may rate their mounts differently.

>

> Eq. Head wt. Rating

>

> Losmandy GM-8 21# 30# ?8" SCT

> AP 400 21# ? 8" SCT

> AP 600 27# ? 10" SCT

> Losmandy G-11 36# 60#

> AP 900 40# 70#

> AP 1200 91# 140#

> HGM 200 97# 150#

>

> The G-11 is a pretty hefty mount, closer to the 900 in size.

>

> Derek

>

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

#313 Mar 1, 2000

Hi Charles,



I like the 900GTO too, I bought one. But the G11 is

amazingly stable even with a C14. Maybe it has more

to do with the Losmandy semi-pier and tripod.



Rich



>No way, the 900 GTO is much much larger then the G11. I have owned both

>mounts and I would put the G11 at the 600E size, Definatly not in the same

>league as the 900 gto. I have owner both mounts and have used the same size

>scope on them and the 900 is significantly more stable and load capacity

and >in every way more then the G11....though the 600E and the G11 (while I

would >lean on the 600E greater) is a much more reasonable comparison.

>

> charles

>

>----- Original Message -----

>From: Derek Wong dawong@...>

>To: ap-gto@egroups.com>

>Sent: Tuesday, February 29, 2000 9:52 PM

>Subject: [ap-gto] Re: 600 GTO payload capacity

>

>

>> "Douglas W. Forehand" wrote:

>> >

>> > Anyone care to speculate why the 600 series mount is

>> > is rated to carry a SCT size of 10 inches max where as

>> > the Losmandy G11, which is not that much different in

>> > size, routinely carries C14's ?

>> >

>> > Lets limit the discussion to visual applications only.

>>

>> Hi Doug:

>>

>> Here are the specs, although it is hard to compare since two

>> manufacturers may rate their mounts differently.

>>

>> Eq. Head wt. Rating

>>

>> Losmandy GM-8 21# 30# ?8" SCT

>> AP 400 21# ? 8" SCT

>> AP 600 27# ? 10" SCT

>> Losmandy G-11 36# 60#

>> AP 900 40# 70#

>> AP 1200 91# 140#

>> HGM 200 97# 150#

>>

>> The G-11 is a pretty hefty mount, closer to the 900 in size.

>>

>> Derek

>>

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>>

>

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

#314 Mar 1, 2000

Date: Tue, 29 Feb 2000 23:52:34 -0800

> From: "Steve Leikind" sleikind@...>

>

> I think this is a matter of personal preference. My experience has

> been that a G-11 is adequate with a Meade 12" SCT OTA provided there is

> no wind. However, in light to moderate wind, there is too much

> vibration for my taste. On the other hand, if I used this combination

> in an observatory sheltered from wind -- maybe.

>

> "rich n." rnap-@...> wrote:

>

> > A C14 on a G11 mount is quite stable for visual use.

> >

>



So does anyone believe there is cause for concern about the long

term reliability of the motors and bearings in either the G11

or the AP600GTO when loaded with the mass of a C14 + counterweights ?



-Doug



USPS: Douglas W. Forehand INTERNET: dwf@...

Sun Microsystems Inc. VOICE: (408) 774-8015

901 San Antonio Road, MS USUN02-101 FAX: (408) 774-2098

Palo Alto, California 94303-4900



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

#315 Mar 1, 2000

>

>> > A C14 on a G11 mount is quite stable for visual use.

>> >

>>

>

>So does anyone believe there is cause for concern about the long

>term reliability of the motors and bearings in either the G11

>or the AP600GTO when loaded with the mass of a C14 + counterweights ?

>

>-Doug





Why push a very nice, not inexpensive, mount like

the AP600GTO by loading it down with a C14?



Once when I wanted to compare my old AP 152mm f/9

StarFire to my new AP 155mm f/9 EDT StarFire, I mounted

the older StarFire on Celestron SP mount. With extra weights

and careful balancing the SP motors drove the big OTA

very nicely.



Apparently the G11 is designed to take a heavy load. It is

also relatively inexpensive. If I couldn't afford one of the larger

AP mounts I would feel much better taking a chance with the

less expensive G11.



Rich



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

#316 Mar 1, 2000

From: "Rich N." rnapo@...>

> Date: Wed, 1 Mar 2000 14:50:49 -0800

>

> >>

> >> > A C14 on a G11 mount is quite stable for visual use.

> >> >

> >>

> >

> >So does anyone believe there is cause for concern about the long

> >term reliability of the motors and bearings in either the G11

> >or the AP600GTO when loaded with the mass of a C14 + counterweights ?

> >

>

>

> Why push a very nice, not inexpensive, mount like

> the AP600GTO by loading it down with a C14?



I agree.

As far as me and my 600GTO are concerned its an academic question.

>

> Apparently the G11 is designed to take a heavy load.



That is my understanding as well. However being an engineer I'm

interested in what design features Losmandy optimized (bearings,

high torque motors,...). So far all I've heard leads me to the

conclusion that there really isn't a significant difference between

the CAPABILITIES of the mounts; just their specs.

> It is also relatively inexpensive. If I couldn't afford one of the

> larger AP mounts I would feel much better taking a chance with the

> less expensive G11.



Although the GOTO G11 is none too cheap at $3595.



-Doug



USPS: Douglas W. Forehand INTERNET: dwf@...

Sun Microsystems Inc. VOICE: (408) 774-8015

901 San Antonio Road, MS USUN02-101 FAX: (408) 774-2098

Palo Alto, California 94303-4900



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

#317 Mar 1, 2000

> From: "Rich N." rnapo@...>

>> Date: Wed, 1 Mar 2000 14:50:49 -0800

>>

>> >>

>> >> > A C14 on a G11 mount is quite stable for visual use.

>> >> >

>> >>

>> >

>> >So does anyone believe there is cause for concern about the long

>> >term reliability of the motors and bearings in either the G11

>> >or the AP600GTO when loaded with the mass of a C14 + counterweights ?

>> >

>>

>>

>> Why push a very nice, not inexpensive, mount like

>> the AP600GTO by loading it down with a C14?

>

>I agree.

>As far as me and my 600GTO are concerned its an academic question.

>

>>

>> Apparently the G11 is designed to take a heavy load.

>

>That is my understanding as well. However being an engineer I'm

>interested in what design features Losmandy optimized (bearings,

>high torque motors,...). So far all I've heard leads me to the

>conclusion that there really isn't a significant difference between

>the CAPABILITIES of the mounts; just their specs.



Not true. The only load specs for 600 say it will take certain sized

OTAs. The Cas rating is 10". The G11 is/was sold with C14s.

A C14 is quite a bit more of a load than a 10" Meade SCT.

>> It is also relatively inexpensive. If I couldn't afford one of the

>> larger AP mounts I would feel much better taking a chance with the

>> less expensive G11.

>

>Although the GOTO G11 is none too cheap at $3595.





Ok, for the GOTO model, but I have virtually zero interest in GOTO.

The standard G11 can be purchased for about $2k USD.



Rich



>

>-Doug







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

#3499 Sep 16, 2001

Would someone please measure their counter weight shaft on either the

400 or 600 GTO mounts and tell me what is the diameter of the shaft?

I would like to use some AP counter weights on a different brand of

mount, if they will fit.

Thanks,

Rex Repich

repichr@...



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

#3500 Sep 16, 2001

1.125"



-- In ap-gto@y..., repichr@e... wrote: > Would someone please measure their counter weight shaft on either

the > 400 or 600 GTO mounts and tell me what is the diameter of the shaft?

> I would like to use some AP counter weights on a different brand of

> mount, if they will fit.

> Thanks,

> Rex Repich

> repichr@e...



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

#3501 Sep 16, 2001

My 400QMD's shaft appears to be 1 1/8" in diameter.





From: Rex Repich > Would someone please measure their counter weight shaft on either the

> 400 or 600 GTO mounts and tell me what is the diameter of the shaft?

> I would like to use some AP counter weights on a different brand of

> mount, if they will fit.



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

#4643 Mar 22, 2002

What is considered to be and acceptable amount of residual periodic

error after autoguiding? My current setup consists of an AP 130 mm

f/6 EDFS, AP 600 GTO, and a ST7E camera in the self guide mode. I am

relatively new to astrophotography and my best efforts result in a

peak-to-peak periodic error of 1 pixel. This one pixel error

corresponds to approximately 3.5 asec. I have the mount adjusted for

no backlash, a guide speed of 1x, and an aggresiveness factor of 7.

The camera software is CCDSoft v5.



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

#4644 Mar 22, 2002

In a message dated 3/22/2002 1:08:59 PM Pacific Standard Time,

dgbarar@... writes:



> What is considered to be and acceptable amount of residual periodic

> error after autoguiding? My current setup consists of an AP 130 mm

> f/6 EDFS, AP 600 GTO, and a ST7E camera in the self guide mode. I am

> relatively new to astrophotography and my best efforts result in a

> peak-to-peak periodic error of 1 pixel.



1 pixel is doing quite good. Are you getting 1 pixel in both axes? Does it

occur in only in RA? Is this 1 pixel a true periodic error, or is it a random

error caused by atmospheric motion. What is your guider integration time?



Roland Christen





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



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

#4645 Mar 22, 2002

I obtain a 1 pixel error (3.1 asec) in the RA axis and a 0.5 pixel

error (1.8 asec) in the declination axis. The 1 pixel error is true

periodic error and not the result of random fluctuations from

atmospheric turbulance. I have used integration times for the guide

exposure of between 4 and 6 seconds.



Don Barar

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

> In a message dated 3/22/2002 1:08:59 PM Pacific Standard Time,

> dgbarar@e... writes:

>

>

> > What is considered to be and acceptable amount of residual

periodic

> > error after autoguiding? My current setup consists of an AP 130

mm

> > f/6 EDFS, AP 600 GTO, and a ST7E camera in the self guide mode.

I am

> > relatively new to astrophotography and my best efforts result in

a

> > peak-to-peak periodic error of 1 pixel.

>

> 1 pixel is doing quite good. Are you getting 1 pixel in both axes?

Does it

> occur in only in RA? Is this 1 pixel a true periodic error, or is

it a random

> error caused by atmospheric motion. What is your guider integration

time?

>

> Roland Christen

>

>

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



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

#4646 Mar 22, 2002

In a message dated 3/22/2002 2:58:51 PM Pacific Standard Time,

dgbarar@... writes:



> have used integration times for the guide

> exposure of between 4 and 6 seconds



Try cutting this down to 2 seconds and increase the agressiveness, or

decrease the RA parameter numbers. If you have a true periodic error of 10-12

arc seconds, then in any 6 second period, your maximum drift will be 1 arc

sec or less. Try taking a 6 second unguided exposure to see what your star

elongation is in arc seconds or in pixels. Are you sure you are not seeing RA

drift due to polar misalignment? If you are seeing true uncorrected periodic

error, you can see it in your guider log. You can also see whether it's

really caused by RA drift, which can be many times worse than periodic error.

In any case, if the guide parameters are set correctly, then periodic error

can be guided out totally.



By the way, are you using Maxim to control your guiding? Are you entering the

declination in the guide parameters?



Roland Christen







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



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

#4647 Mar 22, 2002

I will attempt reducing exposure time to 2 seconds and increasing the

aggressiveness/reduce RA parmaeters time this evening if weather permits.

Additionally, I will look at the error in pixels of an unguided 6 second

exposure. In response to your other queries:



I do not believe that I have significant drift do to polar misalignment as I

have drift polar aligned with the ST7E camera and CCDOPs until the I got a

flat line in the Dec Axis. I am assuming that I would recognize non-polar

alignment in the RA by the sinusoidal curve gently falling/rising over time.

Is this correct? In any case, the sinusoidal curve for my non-autoguided

track logs does not appear to rise/fall over time.



I am using CCDSoft version 5 to autoguide and collect data.



All autoguide logs and information that I have provided are based on stars

along the celestial equator. If I attempt to image away from the celestial

equator, I recalibrate first and place the declination coordinates in

appropriate place in the software.



Your previous EMail indicated that with a mount that had 12 asec of periodic

error a six second exposure would result in 1 asec of drift. My 600 GTO has

an error period of 10 minutes with 11 asec peak-to-peak error. If the

peak-to-peak error occured over 5 minutes (1/2 of a full cycle) I calculate

a six second error of 0.22 asec. Is this correct?



Don Barar



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

From: chris1011@...>

To: ap-gto@yahoogroups.com>

Sent: Friday, March 22, 2002 4:15 PM

Subject: Re: [ap-gto] Re: Periodic Error on 600 GTO





> In a message dated 3/22/2002 2:58:51 PM Pacific Standard Time,

> dgbarar@... writes:

>

>

> > have used integration times for the guide

> > exposure of between 4 and 6 seconds

>

> Try cutting this down to 2 seconds and increase the agressiveness, or

> decrease the RA parameter numbers. If you have a true periodic error of

10-12

> arc seconds, then in any 6 second period, your maximum drift will be 1 arc

> sec or less. Try taking a 6 second unguided exposure to see what your star

> elongation is in arc seconds or in pixels. Are you sure you are not seeing

RA

> drift due to polar misalignment? If you are seeing true uncorrected

periodic

> error, you can see it in your guider log. You can also see whether it's

> really caused by RA drift, which can be many times worse than periodic

error.

> In any case, if the guide parameters are set correctly, then periodic

error

> can be guided out totally.

>

> By the way, are you using Maxim to control your guiding? Are you entering

the

> declination in the guide parameters?

>

> 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/

>

>

>







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

#4982 May 28, 2002

Hi All

I have a question about capacity. Is anyone out there using a 600 GTO with a 155mm. I would like to hear and comments on photographic stability of the mount and scope combo. I have a chance to buy a new 600GTO and have made my deposit for a 900GTO but will not receive it till Jan~. Also I would like to have opinions on how much counter weight I would need. The other scopes I would use are a 8" Schmidt Camera 18 lbs., 102mm Starfire and a 10 S.C. OTA all with a 80mm guide scope and rings about 8 lbs.. The mount would be used mostly in an Observatory if I can ever get it built, But I would like to have the portability of the 600.

Thanks

Douglas Schmutz

www.infowest.com/personal/s/schmutz/





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



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

#4984 May 29, 2002

Doug,



I would suggest that you stay with the 900 mount. I

had a 600e from the last production run and I too got

called for a 900. It was a tough decision but, I let

the 600e go. Since it appears that you are into

photography, and larger and more stable mount would be

a better choice. Just a note: I have had my 155EDF w/

80mm guidescope on the 600e and thats really pushing

it. The mount worked flawlessly, however, a windy day

would be a problem.



As for setup, I found that setup time for the 600e and

my 1200 was nearly the same in my case (everything has

to goes in the truck in a specific order) if that has

any bearing on your decision.



I'll post an image of 891 taken with the 155edf 80mm

guidescope and 600e, so you can see how well it

tracked.



Tim



--- Douglas Schmutz schmutz@...> wrote: > Hi All

> I have a question about capacity. Is anyone out

> there using a 600 GTO with a 155mm. I would like to

> hear and comments on photographic stability of the

> mount and scope combo. I have a chance to buy a new

> 600GTO and have made my deposit for a 900GTO but

> will not receive it till Jan~. Also I would like to

> have opinions on how much counter weight I would

> need. The other scopes I would use are a 8" Schmidt

> Camera 18 lbs., 102mm Starfire and a 10 S.C. OTA all

> with a 80mm guide scope and rings about 8 lbs.. The

> mount would be used mostly in an Observatory if I

> can ever get it built, But I would like to have the

> portability of the 600.

> Thanks

> Douglas Schmutz

> www.infowest.com/personal/s/schmutz/

>

>

> [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/

>

>







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

Do You Yahoo!?

Yahoo! - Official partner of 2002 FIFA World Cup

fifaworldcup.yahoo.com



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

#4986 May 29, 2002

FWIW, I think you'll be happier (and have more future scope options)

with the 900GTO. Also, the 900 is very portable..not an issue.



Randy Nulman

--- In ap-gto@y..., "Douglas Schmutz" schmutz@i...> wrote:

> Hi All

> I have a question about capacity. Is anyone out there using a 600

GTO with a 155mm. I would like to hear and comments on photographic

stability of the mount and scope combo. I have a chance to buy a new

600GTO and have made my deposit for a 900GTO but will not receive it

till Jan~. Also I would like to have opinions on how much counter

weight I would need. The other scopes I would use are a 8" Schmidt

Camera 18 lbs., 102mm Starfire and a 10 S.C. OTA all with a 80mm

guide scope and rings about 8 lbs.. The mount would be used mostly in

an Observatory if I can ever get it built, But I would like to have

the portability of the 600.

> Thanks

> Douglas Schmutz

> www.infowest.com/personal/s/schmutz/

>

>

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



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

#4987 May 29, 2002

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

From: "randy_nulman" rjnulman@...>

> Also, the 900 is very portable..not an issue.

>

> Randy Nulman





Hi Randy!



Oye vey... Depends on your definition of _very_ _portable_... LOL!



I schlep my 900GTO all over the place, but two large mount pieces (in a

Pelican 1650 case), a separate counterweight shaft, 8x60 pier, pier legs, 18

inch mounting plate, screws, two 18 pound counterweights and 14 pounder,

controller, motor cords, power cord, hex wrenches, yada yada yada. LOL!



I love my 900GTO but _very_ portable? I'd say "sort of transportable". :)



Clear Skies!

Jeff "Short fat and dumpy" G.



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

#4989 May 29, 2002

Go with the 900GTO. I had a 600EGTO and now have a 900GTO. The 600 was about

right for a 130mm f/6 and guidescope for film imaging. I also used it with a

Takahashi TSC 225 for visual and planetary imaging.



The 600 is very much like the Takahashi EM200 design. The Dec and RA unit

stay together, but hinge. The 900 comes apart with a very easy-to-use

dovetail system. As a result, I feel the 600 is not much more portable than

the 900. Its awkwardness takes away some of the advantage of its smaller

size. The main difference is that some of the other parts are smaller. The

counterweights are smaller, and the counterweight shaft is smaller. The

pieces of the pier are smaller, but it is just as much work to assemble as

the 900 pier. The 900 is much more stable than the 600.



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 05/28/02 7:35 PM Douglas Schmutz wrote:



> Hi All

> I have a question about capacity. Is anyone out there using a 600 GTO with a

> 155mm. I would like to hear and comments on photographic stability of the

> mount and scope combo. I have a chance to buy a new 600GTO and have made my

> deposit for a 900GTO but will not receive it till Jan~. Also I would like to

> have opinions on how much counter weight I would need. The other scopes I

> would use are a 8" Schmidt Camera 18 lbs., 102mm Starfire and a 10 S.C. OTA

> all with a 80mm guide scope and rings about 8 lbs.. The mount would be used

> mostly in an Observatory if I can ever get it built, But I would like to have

> the portability of the 600.

> Thanks

> Douglas Schmutz

> www.infowest.com/personal/s/schmutz/







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

#4990 May 29, 2002

Good point Jeff! I was just thinking of the mount..not all the

other "goodies" that need to be schlepedg>! (I assumed these other

things would also need to be transported with a 600GTO as well)



The 900 mount itself is not too bad to handle (even for me!)



Regards,

Randy Nulman ("short, skinny & weak!)

--- In ap-gto@y..., "Jeffrey D. Gortatowsky" indanapt@y...> wrote:

>

> ----- Original Message -----

> From: "randy_nulman" rjnulman@w...>

> > Also, the 900 is very portable..not an issue.

> >

> > Randy Nulman

>

>

> Hi Randy!

>

> Oye vey... Depends on your definition of _very_ _portable_... LOL!

>

> I schlep my 900GTO all over the place, but two large mount pieces

(in a

> Pelican 1650 case), a separate counterweight shaft, 8x60 pier, pier

legs, 18

> inch mounting plate, screws, two 18 pound counterweights and 14

pounder,

> controller, motor cords, power cord, hex wrenches, yada yada yada.

LOL!

>

> I love my 900GTO but _very_ portable? I'd say "sort of

transportable". :)

>

> Clear Skies!

> Jeff "Short fat and dumpy" G.



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

#4991 May 29, 2002

Thanks to all who responded. I am going to wait for the 900. I have been

packing around a 12" lx200 for the last 3 years and haven't had a problem

with the weight so I am sure the diff. between the 900/600 won't be a

problem. Now I just have to wait for my 155 to be ready. Thanks again for

the opinions.

Douglas Schmutz

www.infowest.com/personal/s/schmutz/ ----- Original Message -----

From: Robin Casady rcasady@...>

To: ap-gto@yahoogroups.com>

Sent: Wednesday, May 29, 2002 12:43 PM

Subject: Re: [ap-gto] 600 GTO





> Go with the 900GTO. I had a 600EGTO and now have a 900GTO. The 600 was

about

> right for a 130mm f/6 and guidescope for film imaging. I also used it with

a

> Takahashi TSC 225 for visual and planetary imaging.

>

> The 600 is very much like the Takahashi EM200 design. The Dec and RA unit

> stay together, but hinge. The 900 comes apart with a very easy-to-use

> dovetail system. As a result, I feel the 600 is not much more portable

than

> the 900. Its awkwardness takes away some of the advantage of its smaller

> size. The main difference is that some of the other parts are smaller. The

> counterweights are smaller, and the counterweight shaft is smaller. The

> pieces of the pier are smaller, but it is just as much work to assemble as

> the 900 pier. The 900 is much more stable than the 600.

>

> 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 05/28/02 7:35 PM Douglas Schmutz wrote:

>

> > Hi All

> > I have a question about capacity. Is anyone out there using a 600 GTO

with a

> > 155mm. I would like to hear and comments on photographic stability of

the

> > mount and scope combo. I have a chance to buy a new 600GTO and have

made my

> > deposit for a 900GTO but will not receive it till Jan~. Also I would

like to

> > have opinions on how much counter weight I would need. The other scopes

I

> > would use are a 8" Schmidt Camera 18 lbs., 102mm Starfire and a 10 S.C.

OTA

> > all with a 80mm guide scope and rings about 8 lbs.. The mount would be

used

> > mostly in an Observatory if I can ever get it built, But I would like to

have

> > the portability of the 600.

> > Thanks

> > Douglas Schmutz

> > www.infowest.com/personal/s/schmutz/

>

>

> 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/

>

>

>

>



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

#5264 Jul 6, 2002

Hi, anyone have C9.25 or similar size/weight cassegrain on an AP600

GTO mount? I'm on the wait list for an AP600 GTO and want to do

DSOs as well as planetary but consider the AP600 about the limit of

portability for me... So I'm looking for OTA recommendations.

Thanks in advance ...



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

#5265 Jul 6, 2002

I've been flip flopping on a C9.25 and a C8. I'm leaning toward

the C8 because the point of my choice is aperture for the least

weight and trouble.



Rich





>Hi, anyone have C9.25 or similar size/weight cassegrain on an AP600

>GTO mount? I'm on the wait list for an AP600 GTO and want to do

>DSOs as well as planetary but consider the AP600 about the limit of

>portability for me... So I'm looking for OTA recommendations.

>Thanks in advance ...

>

>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/







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

#5266 Jul 6, 2002

Hi Rich, if I were going to think about a C8, I'd give the Intes 703 a hard

look. I have a 503 and the optics are definitely a cut above.

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

From: "Rich N." rnapo@...>

To: ap-gto@yahoogroups.com>

Sent: Saturday, July 06, 2002 11:22 PM

Subject: Re: [ap-gto] Celestron C9.25 on AP600 GTO





> I've been flip flopping on a C9.25 and a C8. I'm leaning toward

> the C8 because the point of my choice is aperture for the least

> weight and trouble.

>

> Rich

>

>

>

> >Hi, anyone have C9.25 or similar size/weight cassegrain on an AP600

> >GTO mount? I'm on the wait list for an AP600 GTO and want to do

> >DSOs as well as planetary but consider the AP600 about the limit of

> >portability for me... So I'm looking for OTA recommendations.

> >Thanks in advance ...

> >

> >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/

>

>

>



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

#5267 Jul 6, 2002

I'm not a Celestron owner, but it was my understanding that the 9.25 was

considerably better than the 8 because its optical design differs

significantly. IIRC, a slower primary resulted in a flatter field for

imaging was the reason. I've looked through both, and the 9.25 was clearly

the winner visually.

Bert



Bert Katzung

katzung1@...

www.astronomy-images.com

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

From: "Rich N." rnapo@...>

To: ap-gto@yahoogroups.com>

Sent: Saturday, July 06, 2002 10:22 PM

Subject: Re: [ap-gto] Celestron C9.25 on AP600 GTO





> I've been flip flopping on a C9.25 and a C8. I'm leaning toward

> the C8 because the point of my choice is aperture for the least

> weight and trouble.

>

> Rich

>

>

>

> >Hi, anyone have C9.25 or similar size/weight cassegrain on an AP600

> >GTO mount? I'm on the wait list for an AP600 GTO and want to do

> >DSOs as well as planetary but consider the AP600 about the limit of

> >portability for me... So I'm looking for OTA recommendations.

> >Thanks in advance ...

> >

> >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/

>

>

>



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

#5268 Jul 6, 2002

Hi Chuck,



I wanted the SCT mostly for DSOs. I'm not sure any difference

between a 703 and a C8 would be practical. But, it's an interesting

option.



Several C8s I've seen give very nice images, if the C8 is

well collimated.



Rich



>Hi Rich, if I were going to think about a C8, I'd give the Intes 703 a

hard >look. I have a 503 and the optics are definitely a cut above.

>

>----- Original Message -----

>From: "Rich N." rnapo@...>

>Sent: Saturday, July 06, 2002 11:22 PM

>Subject: Re: [ap-gto] Celestron C9.25 on AP600 GTO

>

>> I've been flip flopping on a C9.25 and a C8. I'm leaning toward

>> the C8 because the point of my choice is aperture for the least

>> weight and trouble.

>>

>> Rich

>>

>>

>>

>> >Hi, anyone have C9.25 or similar size/weight cassegrain on an AP600

>> >GTO mount? I'm on the wait list for an AP600 GTO and want to do

>> >DSOs as well as planetary but consider the AP600 about the limit of

>> >portability for me... So I'm looking for OTA recommendations.

>> >Thanks in advance ...

>> >

>> >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/



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

#5269 Jul 6, 2002

Hi Bert,



I've heard the C9.25 is very good. I've looked through a couple

of them but not side by side with a C8 and not at a time when I

had a good reference for the seeing.



I would be getting the SCT mostly for deep sky objects. I don't

think the quality of the optics are all that important for a mini light

bucket.



I'm haven't convinced myself that the extra weight and bulk of the

C9.25 is worth it to me. If this was my only OTA, I would go with the

C9.25.



Thanks,

Rich



>I'm not a Celestron owner, but it was my understanding that the 9.25 was

>considerably better than the 8 because its optical design differs

>significantly. IIRC, a slower primary resulted in a flatter field for

>imaging was the reason. I've looked through both, and the 9.25 was clearly

>the winner visually.

>Bert

>

>Bert Katzung

>katzung1@...

>www.astronomy-images.com

>

>----- Original Message -----

>From: "Rich N." rnapo@...>

>Sent: Saturday, July 06, 2002 10:22 PM

>Subject: Re: [ap-gto] Celestron C9.25 on AP600 GTO

>

>> I've been flip flopping on a C9.25 and a C8. I'm leaning toward

>> the C8 because the point of my choice is aperture for the least

>> weight and trouble.

>>

>> Rich

>>

>>

>>

>> >Hi, anyone have C9.25 or similar size/weight cassegrain on an AP600

>> >GTO mount? I'm on the wait list for an AP600 GTO and want to do

>> >DSOs as well as planetary but consider the AP600 about the limit of

>> >portability for me... So I'm looking for OTA recommendations.

>> >Thanks in advance ...

>> >

>> >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/







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

#5271 Jul 7, 2002

I had an Ultima 9.25. I loved the C9.25 OTA but the fork/OTA combination

was too heavy for me. Also, I wanted GOTO. I'm sure you'll be happy

whichever you choose. One of the really nice things about the AP600, you

get GOTO and can swap OTAs when you want to! Clear skies

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

From: "Rich N." rnapo@...>

To: ap-gto@yahoogroups.com>

Sent: Sunday, July 07, 2002 12:44 AM

Subject: Re: [ap-gto] Celestron C9.25 on AP600 GTO





> Hi Chuck,

>

> I wanted the SCT mostly for DSOs. I'm not sure any difference

> between a 703 and a C8 would be practical. But, it's an interesting

> option.

>

> Several C8s I've seen give very nice images, if the C8 is

> well collimated.

>

> Rich

>

>

> >Hi Rich, if I were going to think about a C8, I'd give the Intes 703 a

> hard

> >look. I have a 503 and the optics are definitely a cut above.

> >

> >----- Original Message -----

> >From: "Rich N." rnapo@...>

> >Sent: Saturday, July 06, 2002 11:22 PM

> >Subject: Re: [ap-gto] Celestron C9.25 on AP600 GTO

> >

> >> I've been flip flopping on a C9.25 and a C8. I'm leaning toward

> >> the C8 because the point of my choice is aperture for the least

> >> weight and trouble.

> >>

> >> Rich

> >>

> >>

> >>

> >> >Hi, anyone have C9.25 or similar size/weight cassegrain on an AP600

> >> >GTO mount? I'm on the wait list for an AP600 GTO and want to do

> >> >DSOs as well as planetary but consider the AP600 about the limit of

> >> >portability for me... So I'm looking for OTA recommendations.

> >> >Thanks in advance ...

> >> >

> >> >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/

>

>

>



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

#5272 Jul 7, 2002

cscappaticci wrote:

> Hi, anyone have C9.25 or similar size/weight cassegrain

> on an AP600 GTO mount? I'm on the wait list for an AP600

> GTO and want to do DSOs as well as planetary but consider

> the AP600 about the limit of portability for me... So I'm

> looking for OTA recommendations.



Hi Chuck,



Others here have already given you some great OTA suggestions. I

want to re-assure you of the capacity of AP600.



I attend many public observing sessions and go 'n shows and, while

some may cringe at this, often bring a 600GTO to use with my 8" Mak-

Newt. There have been no problems with its ability to handle it, and

truuuust me... that's no small load (shown on the 900):



astro-nut.com/MNCoolpix2a.JPG



Ready to roll:



astro-nut.com/makpack.jpg



Paul



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

#5273 Jul 7, 2002

Thanks Paul, I guess I'll just wait to get "notified". Thanks everyone for

all of the help...

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

From: "paulhyndman" paul@...>

To: ap-gto@yahoogroups.com>

Sent: Sunday, July 07, 2002 8:25 AM

Subject: [ap-gto] Re: Celestron C9.25 on AP600 GTO





> cscappaticci wrote:

>

> > Hi, anyone have C9.25 or similar size/weight cassegrain

> > on an AP600 GTO mount? I'm on the wait list for an AP600

> > GTO and want to do DSOs as well as planetary but consider

> > the AP600 about the limit of portability for me... So I'm

> > looking for OTA recommendations.

>

> Hi Chuck,

>

> Others here have already given you some great OTA suggestions. I

> want to re-assure you of the capacity of AP600.

>

> I attend many public observing sessions and go 'n shows and, while

> some may cringe at this, often bring a 600GTO to use with my 8" Mak-

> Newt. There have been no problems with its ability to handle it, and

> truuuust me... that's no small load (shown on the 900):

>

> astro-nut.com/MNCoolpix2a.JPG

>

> Ready to roll:

>

> astro-nut.com/makpack.jpg

>

> Paul

>

>

> 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/

>

>

>







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

#5276 Jul 7, 2002

WOW! There's a lot more room in the CLK than I had envisioned! Rear

seats fold down I take it?



A great car that I lust after immensely!



Alas, with 3 kids and one in a car seat yet, my wife won't let me buy a

2 door until they are all grown up.



Mark

On Sunday, July 7, 2002, at 09:25 AM, paulhyndman wrote:



> cscappaticci wrote:

>

>> Hi, anyone have C9.25 or similar size/weight cassegrain

>> on an AP600 GTO mount? I'm on the wait list for an AP600

>> GTO and want to do DSOs as well as planetary but consider

>> the AP600 about the limit of portability for me... So I'm

>> looking for OTA recommendations.

>

> Hi Chuck,

>

> Others here have already given you some great OTA suggestions. I

> want to re-assure you of the capacity of AP600.

>

> I attend many public observing sessions and go 'n shows and, while

> some may cringe at this, often bring a 600GTO to use with my 8" Mak-

> Newt. There have been no problems with its ability to handle it, and

> truuuust me... that's no small load (shown on the 900):

>

> astro-nut.com/MNCoolpix2a.JPG

>

> Ready to roll:

>

> astro-nut.com/makpack.jpg

>

> Paul

>

>

> 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/

>

>

>



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

#5277 Jul 7, 2002

I have the 9.25" on an 600E Goto. The mount can handle this load with

an ST-7E CCD inserted. You will need a Losmandy bar and special AP

dovetail plate. I also recommend if using a CCD the sliding weight

assembly (two 2.5lb weights - I use one) from Losmandy to balance the

scope. I have two 9lb and one 6lb counterweights. It takes a bit to

get the right balance point but it all works. The mount is on the

wooden tripod - a pier would be a bit better I think. It is a portable

setup and I do astrometry with it. The 9.25 optics are very good. I

have a C8 OTA and the weight difference versus aperture can't compete.

Go with the 9.25".



Chris. Spratt

MPC Site #642 (Oak Bay, Victoria)

--- In ap-gto@y..., "cscappaticci" cscappaticci@m...> wrote:

> Hi, anyone have C9.25 or similar size/weight cassegrain on an AP600

> GTO mount? I'm on the wait list for an AP600 GTO and want to do

> DSOs as well as planetary but consider the AP600 about the limit of

> portability for me... So I'm looking for OTA recommendations.

> Thanks in advance ...



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

#5295 Jul 8, 2002

I used to have a 600EGTO that I used with a Takahashi TSC 225 (9" SCT). It

was good for visual in most situations. The TSC has a rather long aluminum

dew sheild and a 15 mph wind would be a problem. The C9.25 is slightly

larger than the TSC.



BTW, I did a side-by-side with a friend's C9.25 once. Only on globular

clusters did the C9.25 come close to the TSC for visual.



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 07/06/02 10:15 PM cscappaticci wrote:



> Hi, anyone have C9.25 or similar size/weight cassegrain on an AP600

> GTO mount? I'm on the wait list for an AP600 GTO and want to do

> DSOs as well as planetary but consider the AP600 about the limit of

> portability for me... So I'm looking for OTA recommendations.

> Thanks in advance ...



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

#8234 Aug 9, 2003

Dear 600 GTO owners,



recently the RA motor of my mount stalled, and could not be revitalized.

It's obviously defective. Roland told me to upgrade to the new stronger

motors, which are in production now. Because of different gear ratios

they require another controller chip.

If anybody has upgraded to the new motors, please contact me privately.

I would like to get some information on this issue in order to find out

if it's worth doing so.

Thank you,



Joachim Frings



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

#9688 Feb 17 8:19 PM

Does anyone have an idea how long the waiting list is for the 600 GTO? I've been on the list since March 2001.

Will there be a run of these this year?



Thanks



Mike





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



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

#12517 Apr 5, 2005

I'm looking at purchasing a used 600 gto with the ash tripod with software version

3.09. Is this version relatively bug free and will this mount be steady enough when

used with my SV105 and a SV80 as a guide scope with a STV autoguider and a

Canon 20D on the SV105. I have a Losmandy G11 with an Argo Navisat the present

time and am looking to get into a go to mount. Also how steep is the learning curve

to get used to the AP Go To controls. Any input from experienced AP users would

be great.



Thanks,

Mitch



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

#12518 Apr 6, 2005

It should be fine with a 105 and 80 guide scope. The 600 can handle a

130mm f/6 & guides cope for imaging.



The learning curve is not steep. If you've never used GOTO before, it

is a good idea to read the manual carefully, but it isn't difficult.

You do have to be carefully polar aligned, but that is required for

imaging anyway. Just curious, why did you decide not to add Gemini to

your G11?



Regards,

Robin

Astro Accessories from RobinCasady.com

www.robincasady.com/Astro

On Apr 05, 2005, at 5:58 PM, Mitch wrote:



> I'm looking at purchasing a used 600 gto with the ash tripod with

> software version

> 3.09. Is this version relatively bug free and will this mount be

> steady enough when

> used with my SV105 and a SV80 as a guide scope with a STV autoguider

> and a

> Canon 20D on the SV105. I have a Losmandy G11 with an Argo Navisat the

> present

> time and am looking to get into a go to mount. Also how steep is the

> learning curve

> to get used to the AP Go To controls. Any input from experienced AP

> users would

> be great.

>

> Thanks,

> Mitch







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

#12523 Apr 6, 2005

Mitch:



I have an AP600E GTO mount that I use with my AP130EDFS and ST10XME/CFW8A. The guiding with this setup is excellent. The tools that AP provides for polar alignment work extremly well. I find the meridain delay feature to to align adjust the altitude outstanding. With my old ST7E camera, I always was able to place the object on the chip once the mount was aligned.



Don



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

From: Mitch Gorsenmut@...>

Sent: Apr 6, 2005 8:58 AM

To: ap-gto@yahoogroups.com

Subject: [ap-gto] Is the 600 gto big enough?









I'm looking at purchasing a used 600 gto with the ash tripod with software version

3.09. Is this version relatively bug free and will this mount be steady enough when

used with my SV105 and a SV80 as a guide scope with a STV autoguider and a

Canon 20D on the SV105. I have a Losmandy G11 with an Argo Navisat the present

time and am looking to get into a go to mount. Also how steep is the learning curve

to get used to the AP Go To controls. Any input from experienced AP users would

be great.



Thanks,

Mitch

















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

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

Yahoo! Groups Links



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

#13268 Jul 25, 2005

Marj or Roland,



I recollect that you were thinking about redesigning and doing a run

of the A-P 600 GTO later this fall.



Is that still in the cards? or am I all wet?



Thanks,

Craig



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

#13270 Jul 26, 2005

In a message dated 7/26/2005 12:03:19 AM Central Daylight Time,

scopehead@... writes:



> I recollect that you were thinking about redesigning and doing a run

> of the A-P 600 GTO later this fall.

>



It's still in process.



Roland Christen





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



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

#24202 Feb 27 3:50 PM

Hello



I have a 600 GTO that is about 10 years old. I have used it very little

because I got a 900 GTO right after the 600.

I had the 600 out this week for the first time in a year or so and it

is very stiff in RA and the yellow light comes on and it stops tracking

(although I still hear some motor sounds). It was about 25F. The

problem comes and goes. I have a fully charged battery and the load is

balanced. It is stiff even with the clutch disengaged and hard to

determine balance. It is a lot better when inside and warm so I am

guessing it has stiff lubricants. Can I fix this at home or must I send

the unit in for repair. Is there another explanation for the drag?



Dale



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

#24209 Mar 1, 2009

Dale --



Think of the RA axis as having 3 pieces: the fixed piece (with the motor and worm), the worm wheel, and the part that carries the telescope. The motor only sees motion between the fixed part and the worm wheel, while the clutch controls the motion between the worm wheel and the part that carries the DEC axis and telescope.



None of this is to say that you don't have stiff lubricants; just that stiff movement with the clutch loose is not measuring the stiffness of the lubricants between the worm and the worm wheel (but rather that between the worm wheel and the part that carries the DEC axis and telescope).



Cheers,

-- Jeff.





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

Sent: Friday, February 27, 2009 11:51 PM

To: ap-gto@yahoogroups.com

Subject: [ap-gto] 600 GTO stalling





Hello



I have a 600 GTO that is about 10 years old. I have used it very little

because I got a 900 GTO right after the 600.

I had the 600 out this week for the first time in a year or so and it

is very stiff in RA and the yellow light comes on and it stops tracking

(although I still hear some motor sounds). It was about 25F. The

problem comes and goes. I have a fully charged battery and the load is

balanced. It is stiff even with the clutch disengaged and hard to

determine balance. It is a lot better when inside and warm so I am

guessing it has stiff lubricants. Can I fix this at home or must I send

the unit in for repair. Is there another explanation for the drag?



Dale







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



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

#24232 Mar 2, 2009

In a message dated 2/27/2009 5:51:11 PM Central Standard Time,

direland@... writes:



> I had the 600 out this week for the first time in a year or so and it

> is very stiff in RA and the yellow light comes on and it stops tracking

> (although I still hear some motor sounds). It was about 25F. The

> problem comes and goes. I have a fully charged battery and the load is

> balanced. It is stiff even with the clutch disengaged and hard to

> determine balance. It is a lot better when inside and warm so I am

> guessing it has stiff lubricants. Can I fix this at home or must I send

> the unit in for repair. Is there another explanation for the drag?

>



Being stiff with the clutch loose and having it stall are two different

issues. The clutch looseness or tightness has nothing to do with the load on the

motor.



If you want to have the mount checked out and overhauled, please contract

Christine at AP for a return number.



Rolando





**************

A Good Credit Score is 700 or Above. See yours in just 2

easy steps!

(pr.atwola.com/promoclk/100126575x1219957551x1201325337/aol?redir= ---Links-Are-Forbidden--- portions of this message have been removed]







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

#24233 Mar 2, 2009

In a message dated 3/1/2009 10:14:39 AM Central Standard Time,

direland@... writes:



> Yes I understand but there must be some lubricants in the bearings. I don't

> see any dampen adjustment like the 900 has but the effect is the same.

>



There are no damping adjustments on the 900 in the GTO versions.



Rolando





**************

A Good Credit Score is 700 or Above. See yours in just 2

easy steps!

(pr.atwola.com/promoclk/100126575x1219957551x1201325337/aol?redir= ---Links-Are-Forbidden--- portions of this message have been removed]



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

#36187 Apr 25, 2012

Here is more information regarding the new 1600GTO,including some comparisons to the 1200 GTO. We hope to introduce many of you to this newest addition to our lineup at NEAIC and NEAF. See you there.



* Use the clutches to balance your scope, then you can lock down it down .if you want (using bolts) for a permanent setup.

* Clutches .are same design as Mach1 and 3600 - no clutch plugs

* Gear mesh procedure is fast and accurate.

* Larger Dec. Axis .and beefier side plates allow more weight capacity and is more.resistant to wind load..

* Larger Dec. gearwheel provides more precise guiding in Dec.

* 2" Diameter opening for internal cabling..

* Meridian delay feature allows you to image up to six hours past the meridian..

* Uses same counterweights, mounting plates, piers and power supplies as the 1200 GTO.

* Robust Swiss DC servo motor drive uses the same motor/motor encoder as the larger 3600GTO mount. These motors have proven their reliability in the extreme Antarctic environment where they operate 24/7 for an entire winter season..

* The servo drive system includes the GTOCP3 Control Box and Keypad; .both with proven reliability in the field. .

* Breaks down into manageable components, allowing it.to be transportable..

* Modular design philosophy allows you to purchase the basic mount initially, then add other options as needed: polar scope (if you are portable), RA And Dec. Absolute Encoders (for tracking precision, limits and homing), or just the RA Absolute Encoder if tracking .is your only concern.



Control your 1600GTO (or any of our .GTO mounts) using the Keypad, computer or your mobile device.

* The Keypad (included) is a fully-functional hand- held computer..

* Astro-Physics Command Center (APCC) is a PC-based interface offering advanced control options including 3D modeling of telescope position, editable horizon limits, meridian delay settings, dual-model pointing and tracking rate correction even with the telescope in.the counterweight UP position

* Planetarium programs that use our fully-supported ASCOM driver. Note:.for optimal control using TheSky, we recommend controlling .through our ASCOM driver

* Mobile devices such as iPhone and iPad can use the SkySafari app to control the mount through the SkyFi WI-Fi - to - serial adapter..

* Mac Planetarium programs

* Write your own software..



Thank you for reading this far,

Marj Christen



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

#36195 Apr 25, 2012

Hi Marj,



Thanks for the additional information, can't wait to see it in person this

weekend. Will you have pricing established by show time?



Thanks

Dean







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

From: marjchristen

Sent: Wednesday, April 25, 2012 12:46 PM

To: ap-gto@yahoogroups.com

Subject: [ap-gto] 1600 GTO - more information





Here is more information regarding the new 1600GTO,including some

comparisons to the 1200 GTO. We hope to introduce many of you to this newest

addition to our lineup at NEAIC and NEAF. See you there.



* Use the clutches to balance your scope, then you can lock down it down if

you want (using bolts) for a permanent setup.

* Clutches are same design as Mach1 and 3600 - no clutch plugs

* Gear mesh procedure is fast and accurate.

* Larger Dec. Axis and beefier side plates allow more weight capacity and

is more resistant to wind load.

* Larger Dec. gearwheel provides more precise guiding in Dec.

* 2" Diameter opening for internal cabling.

* Meridian delay feature allows you to image up to six hours past the

meridian.

* Uses same counterweights, mounting plates, piers and power supplies as the

1200 GTO.

* Robust Swiss DC servo motor drive uses the same motor/motor encoder as the

larger 3600GTO mount. These motors have proven their reliability in the

extreme Antarctic environment where they operate 24/7 for an entire winter

season.

* The servo drive system includes the GTOCP3 Control Box and Keypad; both

with proven reliability in the field.

* Breaks down into manageable components, allowing it to be transportable.

* Modular design philosophy allows you to purchase the basic mount

initially, then add other options as needed: polar scope (if you are

portable), RA And Dec. Absolute Encoders (for tracking precision, limits and

homing), or just the RA Absolute Encoder if tracking is your only concern.



Control your 1600GTO (or any of our GTO mounts) using the Keypad, computer

or your mobile device.

* The Keypad (included) is a fully-functional hand- held computer.

* Astro-Physics Command Center (APCC) is a PC-based interface offering

advanced control options including 3D modeling of telescope position,

editable horizon limits, meridian delay settings, dual-model pointing and

tracking rate correction even with the telescope in the counterweight UP

position

* Planetarium programs that use our fully-supported ASCOM driver. Note: for

optimal control using TheSky, we recommend controlling through our ASCOM

driver

* Mobile devices such as iPhone and iPad can use the SkySafari app to

control the mount through the SkyFi WI-Fi - to - serial adapter.

* Mac Planetarium programs

* Write your own software.



Thank you for reading this far,

Marj Christen







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



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

see groups.yahoo.com/group/ap-gtoYahoo! Groups Links







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

#36196 Apr 25, 2012

Thanks a lot for these information.



Any chance the new polar scope can be used on the AP1200 ?



Best



Christian Viladrich



Le 25/04/2012 16:46, marjchristen a .crit : > Here is more information regarding the new 1600GTO,including some comparisons to the 1200 GTO. We hope to introduce many of you to this newest addition to our lineup at NEAIC and NEAF. See you there.

>

> * Use the clutches to balance your scope, then you can lock down it down if you want (using bolts) for a permanent setup.

> * Clutches are same design as Mach1 and 3600 - no clutch plugs

> * Gear mesh procedure is fast and accurate.

> * Larger Dec. Axis and beefier side plates allow more weight capacity and is more resistant to wind load.

> * Larger Dec. gearwheel provides more precise guiding in Dec.

> * 2" Diameter opening for internal cabling.

> * Meridian delay feature allows you to image up to six hours past the meridian.

> * Uses same counterweights, mounting plates, piers and power supplies as the 1200 GTO.

> * Robust Swiss DC servo motor drive uses the same motor/motor encoder as the larger 3600GTO mount. These motors have proven their reliability in the extreme Antarctic environment where they operate 24/7 for an entire winter season.

> * The servo drive system includes the GTOCP3 Control Box and Keypad; both with proven reliability in the field.

> * Breaks down into manageable components, allowing it to be transportable.

> * Modular design philosophy allows you to purchase the basic mount initially, then add other options as needed: polar scope (if you are portable), RA And Dec. Absolute Encoders (for tracking precision, limits and homing), or just the RA Absolute Encoder if tracking is your only concern.

>

> Control your 1600GTO (or any of our GTO mounts) using the Keypad, computer or your mobile device.

> * The Keypad (included) is a fully-functional hand- held computer.

> * Astro-Physics Command Center (APCC) is a PC-based interface offering advanced control options including 3D modeling of telescope position, editable horizon limits, meridian delay settings, dual-model pointing and tracking rate correction even with the telescope in the counterweight UP position

> * Planetarium programs that use our fully-supported ASCOM driver. Note: for optimal control using TheSky, we recommend controlling through our ASCOM driver

> * Mobile devices such as iPhone and iPad can use the SkySafari app to control the mount through the SkyFi WI-Fi - to - serial adapter.

> * Mac Planetarium programs

> * Write your own software.

>

> Thank you for reading this far,

> Marj Christen

>

>

>

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

>

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

> see groups.yahoo.com/group/ap-gtoYahoo! Groups Links

>

>

>



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

#39070 Dec 28, 2012

Hello group,



A collegue of mine just acquired an AP600E GTO CP1.





We wonder how to connect it to a PC..is it like with the CP3? (I own an AP 900 GTO CP3)



- does the Ascom driver V2 works also together with the CP1 ? or should we use an older ascom driver?



- should we set the GTO in a special mode in order it waits for the PC messages to synchronise ?



thanks for you help





Olivier



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



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

#39073 Dec 29, 2012

You can use the older GTOCP1 based mount with the new ASCOM AP V2 driver. Be sure to load the latest version - 5.05.10. It will recognize the older control box and work with it accordingly. Connect it in the same manner as the GTOCP3 with a straight-through serial cable.



You don't need to do anything differently from the GTOCP3 with one minor exception. That is when guiding. Although you can still use the ASCOM AP V2 driver for guiding, you will not have the precise timed move commands that are available in the GTOCP3. You therefore might prefer to keep the guider settings on "Relays" and use the guider port instead of using "Telescope" , and thus the driver, in your guiding software. Both should work, but you lose the big advantage of the timed moves because of the older control box.



Mag. 7 Skies!



Howard Hedlund

Astro-Physics, Inc.

Phone: 815-282-1513

www.astro-physics.comwww.astro-physics.com/>

Please include this e-mail with your response.



P Consider the environment before printing this e-mail.





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

Sent: Friday, December 28, 2012 7:37 PM

To: ap-gto@yahoogroups.com

Subject: [ap-gto] Ascom with AP600 GTO CP1 ?







Hello group,



A collegue of mine just acquired an AP600E GTO CP1.



We wonder how to connect it to a PC..is it like with the CP3? (I own an AP 900 GTO CP3)



- does the Ascom driver V2 works also together with the CP1 ? or should we use an older ascom driver?



- should we set the GTO in a special mode in order it waits for the PC messages to synchronise ?



thanks for you help



Olivier



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







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







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

#58544 Sep 24, 2017

Hello all,

Not sure if this is a question for this forum. Please let me know if I need to ask this elsewhere.

I am using AP portable pier with 1600 GTO mount. The setup is in my backyard and it sits on a concrete deck in side a dome observatory. Every time the dome rotates, I can clearly see the vibration in the eyepiece and it is pretty significant. Given that I cannot use soft ground or isolated permanent pier, is there a solution that allows me to reduce the impact of this vibration? I guess I need to have some material that is rigid enough to support the weight of 1600 with a 16 inch setup while still providing dampening properties. Any ideas or solutions?

RegardsHemant



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

#58550 Sep 24, 2017

Probably the best solution is to work on the dome azimuthrotation system to remove the rough movement and/or slow the dome down using aspeed controller compatible with your azimuth motor.����-Christopher EricksonObservatoryengineerSummit KineticsWaikoloa, HI 96738www.summitkinetics.com

��



From: ap-gto@yahoogroups.com[mailto:ap-gto@yahoogroups.com] Sent: Sunday, September 24, 2017 7:38AMTo: ap-gto@yahoogroups.comSubject: [ap-gto] 1600 GTO +AP portable pier vibration dampening?



Hello all,

Not sure if this is a question for this forum. Please let me know if I needto ask this elsewhere.

I am using AP portable pier with 1600 GTO mount. The setup is in mybackyard and it sits on a concrete deck in side a dome observatory. Every timethe dome rotates, I can clearly see the vibration in the eyepiece and it ispretty significant. Given that I cannot use soft ground or isolated permanentpier, is there a solution that allows me to reduce the impact of this vibration?I guess I need to have some material that is rigid enough to support the weightof 1600 with a 16 inch setup while still providing dampening properties. Anyideas or solutions?

RegardsHemant



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

#58570 Sep 25, 2017

Not sure if this is a question for this forum. Please let me know if I needto ask this elsewhere.

I am using AP portable pier with 1600 GTO mount. The setup is in mybackyard and it sits on a concrete deck in side a dome observatory. Everytime the dome rotates, I can clearly see the vibration in the eyepiece andit is pretty significant. Given that I cannot use soft ground or isolatedpermanent pier, is there a solution that allows me to reduce the impact ofthis vibration? I guess I need to have some material that is rigid enoughto support the weight of 1600 with a 16 inch setup while still providingdampening properties. Any ideas or solutions?

RegardsHemet



Since the dome mounting is coupled to the concrete��base which ��the scope sits on, isolation may be difficult.

Remounting the dome track on rubber blocks might work, but before investing so much effort, it may be worth trying vibration��absorbent pads under the pier feet.

I purchased ��some for my 10. AP pier and my Eagle pier from:

tripodpads.com/shop/

I have used these on a concrete balcony to minimise vibration and I believe they helped. They are also good on soft ground, but that.s not your issue.

Not very costly so might be worth a go.

Regards,

Len.



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

#58574 Sep 25, 2017

Hi,�������� Don.t know what you can do,since you realized that thedome and the concrete pier induce vibrations to the non-isolated pier.�������� I would suggest you investigate .industrial typevibration pads. . as are used for machine lathes and other heavy machines toprevent THEM from transmitting vibration to the floor. You should find manysuppliers if you Google.�������� Basically these are layers of cork and hard�� rubbersandwiches. They come in all sizes . large pads or small squares to place undermachine feet. I think this will solve your problem, or at least diminish itquite a bit.�������� Otherwise, the only other solution is software control .where your imaging script can send a command to the some control, to turn offrotation at the start of a subframe�� exposure, and turn it back on betweenthem, so the dome can catch up and reposition itself. Hopefully, your domeopening is wide enough to give you a clear shot for the length of time of thesub.s exposure. Perhaps a really smart dome control program would allow enteringa slit .offset. position, so you would then have almost the full width of thedome slit opening, for the sky to drift from one side to the other, doublingyour normal exposure time.�������� You may also . given these circumstances - might want toconsider a thick padded carpet, so walking around during an exposure doesn.tcause you to add your own vibration. Those thick .interlocking puzzle piecetype. tiles they make for kids play rooms, seems like a good, simple to installor replace, and colourful option.��Just a thought,Joe��From: LenFulham lfulham@... [ap-gto]Sent: Monday, September 25, 2017 7:04 AMTo: ap-gto@yahoogroups.comSubject: [ap-gto] Re: 1600 GTO + AP portable pier vibrationdampening?



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

#58578 Sep 25, 2017

?��smile.amazon.com/gp/product/B001M5PZMU/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

Chris



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

#58589 Sep 25, 2017

You can try using vibration damping pads under the 3 feet. In my observatory I have two isolated pads that are 4ft x 4ft x 6 ft deep, which are not connected to the concrete floor of the observatory. There is a 1 inch gap that is filled with an absorbent material that prevents the pads from being affected by vibrations in the concrete floor.



Rolando







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

From: Hemant Hariyani hemanthariyani@... [ap-gto] ap-gto@yahoogroups.com>

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

Sent: Sun, Sep 24, 2017 12:37 pm

Subject: [ap-gto] 1600 GTO + AP portable pier vibration dampening?





Hello all,

Not sure if this is a question for this forum. Please let me know if I need to ask this elsewhere.

I am using AP portable pier with 1600 GTO mount. The setup is in my backyard and it sits on a concrete deck in side a dome observatory. Every time the dome rotates, I can clearly see the vibration in the eyepiece and it is pretty significant. Given that I cannot use soft ground or isolated permanent pier, is there a solution that allows me to reduce the impact of this vibration? I guess I need to have some material that is rigid enough to support the weight of 1600 with a 16 inch setup while still providing dampening properties. Any ideas or solutions?

RegardsHemant







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

#58592 Sep 25, 2017

Chris,�������� I wonder if there is a motor�� .kick setting. onsuch dome control software, to overcome its static load. If that could belessened, so that the drives ramp up rather than slam into motion, those smalljogs may not be so disturbing.��Joe��From: 'Christopher Erickson'christopher.k.erickson@... [ap-gto]Sent: Sunday, September 24, 2017 3:52 PMTo: ap-gto@yahoogroups.comSubject: RE: [ap-gto] 1600 GTO + AP portable pier vibrationdampening?



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

#58607 Sep 25, 2017

Hello Everyone,

Thank you so much for your valuable feedback. I will try all these options out:.- work on possibility of "smoothing" the motor out.- Get pads for tripod - industrial or tripod pads. Thanks a lot for links!.- rubber flooring and rubber pad under the observatory...- sw control for isolating exposures from dome rotation

These are all great suggestions and I really appreciate all of your help. I will try these out and hopefully a combination of this will reduce the vibration.

RegardsHemant



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