Re: [ap-gto] Re: 1200GTO Ra Cable catches on Ra clutch knob


Oct 27, 2002

 


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

#5904 Oct 27, 2002

Hi, On a very few occasions I have had the Ra cable catch on Ra clutch

knobs while making long slews where the mount switches from East to

west. Fortunatly I only hand tighten the clutches so the cable did not

self destruct. This has made me a little nervous and I have to check

the mount during long slews to make shure it dosn't snag (a real

nusance). I do drape the cable as instructed in the manual but it

seems to want to lay aginst the Ra housing and the 'X' shaped clutch

knobs with their flat ends really grabs the cable if it catches it

just right. Maybe I'm routing the cable incorrectly (I route it

around the west side after it passes through the clip).I am

considering beveling 2/3s of the ends of the knobs about 30 degrees to

allow the cable to easily flip off the knobs. If I do this will it

void warranty? Are there any other suggestions or solutions.





Thanks

Jim



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

#5906 Oct 27, 2002

Hi Jim:

I think I know what you mean but isn't it the Dec cable (the long one)? I

have worried about my dec cable because it lies near or over one of the

clutch knobs when I'm near the zenith. Thus far it has never caught and I

keep my clutch knobs quite (hand) tight. If yours is catching, would a piece

of tape over the knob and bridging down to the housing prevent the cable

from hooking itself under the edge? Not elegant but easy to try out.... I

have thought about doing it myself, just in case.

Bert



Bert Katzung

katzung1@...

www.astronomy-images.com

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

From: "jnomura2001" jnomura@...>

To: ap-gto@yahoogroups.com>

Sent: Sunday, October 27, 2002 10:57 AM

Subject: [ap-gto] 1200GTO Ra Cable catches on Ra clutch knob





> Hi, On a very few occasions I have had the Ra cable catch on Ra clutch

> knobs while making long slews where the mount switches from East to

> west. Fortunatly I only hand tighten the clutches so the cable did not

> self destruct. This has made me a little nervous and I have to check

> the mount during long slews to make shure it dosn't snag (a real

> nusance). I do drape the cable as instructed in the manual but it

> seems to want to lay aginst the Ra housing and the 'X' shaped clutch

> knobs with their flat ends really grabs the cable if it catches it

> just right. Maybe I'm routing the cable incorrectly (I route it

> around the west side after it passes through the clip).I am

> considering beveling 2/3s of the ends of the knobs about 30 degrees to

> allow the cable to easily flip off the knobs. If I do this will it

> void warranty? Are there any other suggestions or solutions.

>

>

> Thanks

> Jim

>

>

> 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/

>

>

>



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

#5907 Oct 27, 2002

In a message dated 10/27/02 12:58:19 PM, jnomura@... writes:



< Hi, On a very few occasions I have had the Ra cable catch on Ra clutch

knobs while making long slews where the mount switches from East to

west. Fortunatly I only hand tighten the clutches so the cable did not

self destruct. This has made me a little nervous and I have to check

the mount during long slews to make shure it dosn't snag (a real

nusance). I do drape the cable as instructed in the manual but it

seems to want to lay aginst the Ra housing and the 'X' shaped clutch

knobs with their flat ends really grabs the cable if it catches it

just right. Maybe I'm routing the cable incorrectly (I route it

around the west side after it passes through the clip).I am

considering beveling 2/3s of the ends of the knobs about 30 degrees to

allow the cable to easily flip off the knobs. If I do this will it

void warranty? Are there any other suggestions or solutions.





Thanks

Jim >>



Jim:

I have found this 'cable catching' to be a real problem my AP1200GTO as well.

It is the only weak point I've found on these mounts.

While the 'X' shaped axis tightening knobs work well for their job, they tend

to catch the DEC cable and I've had to stop several slewing procedures due to

this.

I've had too many other problems to 'iron out' to find a solution to this

problem, so I would welcome what others have done.



Kent Kirkley



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

#5908 Oct 27, 2002

Jim,



I ran into this problem when I overslept while doing some long exposure

imaging. When I awoke, I ran out to the scope and found it had gone well

past the meridian and the DEC cable was caught between the RA knob and

housing; the mount almost broke the cable! I don't remember whether I

caught it just in time or whether the motors stalled or the clutch slipped,

but one thing is certain and that is the mount can apply a lot of force to

a "hung up" cable! Well, I inspected the cable and there were no broken

wires but the insulation was partly ripped off. As a temporary fix, I

wrapped a 2 inch section of cable with silicone tape (it sticks to itself

and is weather resistant). While checking the "repaired" cable, I noticed

that the 1/2" diameter thick section of the cable (where the silicone tape

was wrapped) no longer caught on the RA knob. This may be a clunky solution

but it seems to work well. Of course, it won't solve the problem of the

mount choking itself on its cables if allowed to go too far! I now set a

loud alarm clock to prevent similar mishaps :)



Richard









At 06:57 PM 10/27/2002 +0000, you wrote: >Hi, On a very few occasions I have had the Ra cable catch on Ra clutch

>knobs while making long slews where the mount switches from East to

>west. Fortunatly I only hand tighten the clutches so the cable did not

>self destruct. This has made me a little nervous and I have to check

>the mount during long slews to make shure it dosn't snag (a real

>nusance). I do drape the cable as instructed in the manual but it

>seems to want to lay aginst the Ra housing and the 'X' shaped clutch

>knobs with their flat ends really grabs the cable if it catches it

>just right. Maybe I'm routing the cable incorrectly (I route it

>around the west side after it passes through the clip).I am

>considering beveling 2/3s of the ends of the knobs about 30 degrees to

>allow the cable to easily flip off the knobs. If I do this will it

>void warranty? Are there any other suggestions or solutions.

>

>

>Thanks

>Jim

>

>

>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/







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

#5909 Oct 27, 2002

Your correct - it is the long cable.

A good thought. A plactic cap or tape would probably work.

Jim

--- In ap-gto@y..., "Bert Katzung" katzung1@a...> wrote:

> Hi Jim:

> I think I know what you mean but isn't it the Dec cable (the long

one)? I

> have worried about my dec cable because it lies near or over one of

the

> clutch knobs when I'm near the zenith. Thus far it has never caught

and I

> keep my clutch knobs quite (hand) tight. If yours is catching, would

a piece

> of tape over the knob and bridging down to the housing prevent the

cable

> from hooking itself under the edge? Not elegant but easy to try

out.... I

> have thought about doing it myself, just in case.

> Bert

>

> Bert Katzung

> katzung1@a...

> www.astronomy-images.com

>

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

> From: "jnomura2001" jnomura@p...>

> To: ap-gto@y...>

> Sent: Sunday, October 27, 2002 10:57 AM

> Subject: [ap-gto] 1200GTO Ra Cable catches on Ra clutch knob

>

>

> > Hi, On a very few occasions I have had the Ra cable catch on Ra

clutch

> > knobs while making long slews where the mount switches from East

to

> > west. Fortunatly I only hand tighten the clutches so the cable did

not

> > self destruct. This has made me a little nervous and I have to

check

> > the mount during long slews to make shure it dosn't snag (a real

> > nusance). I do drape the cable as instructed in the manual but it

> > seems to want to lay aginst the Ra housing and the 'X' shaped

clutch

> > knobs with their flat ends really grabs the cable if it catches it

> > just right. Maybe I'm routing the cable incorrectly (I route it

> > around the west side after it passes through the clip).I am

> > considering beveling 2/3s of the ends of the knobs about 30

degrees to

> > allow the cable to easily flip off the knobs. If I do this will it

> > void warranty? Are there any other suggestions or solutions.

> >

> >

> > Thanks

> > Jim

> >

> >

> > 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/

> >

> >

> >



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

#5912 Oct 27, 2002

My 1200GTO's DEC cable also tends to get caught in one of the RA

clutch knobs.



I've been tempted to add a short cylindrical piece of plastic over

the cable. The increased diameter should make the cable too fat to

get caught in the clutch knob.



I was thinking about trying the plastic spiral stuff that Radio Shack

used to sell to bundle wires together. Other potentially useful

materials include some of the relatively large diameter plastic

tubing (perhaps sold by Small Parts, Inc., Florida). Pipe insulation

might slso do the trick (I'm not sure if any of this product is the

right size though).



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

#5913 Oct 28, 2002

In a message dated 10/27/2002 12:58:11 PM Central Standard Time,

jnomura@... writes:



> Hi, On a very few occasions I have had the Ra cable catch on Ra clutch

> knobs while making long slews where the mount switches from East to

> west



One solution would be for us to machine a rounded knob with or without the X

portion for the thumb. We could make these available to users of all our

mounts. I will experiment with some different shapes to see which would work

best and let you know the results.



Roland Christen





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



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

#5914 Oct 28, 2002

I would second this as it takes some clever positioning of all cables to

avoid problems and the clutch knob is a prime catch point. One uses the

Allen wrench for tightening anyhow an a round/flush design would be great.



Ludwig



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

From: chris1011@... [mailto:chris1011@...]

Sent: Monday, October 28, 2002 9:59 AMI would second this

To: ap-gto@yahoogroups.com

Subject: Re: [ap-gto] 1200GTO Ra Cable catches on Ra clutch knob





In a message dated 10/27/2002 12:58:11 PM Central Standard Time,

jnomura@... writes:



> Hi, On a very few occasions I have had the Ra cable catch on Ra clutch

> knobs while making long slews where the mount switches from East to

> west



One solution would be for us to machine a rounded knob with or without the X



portion for the thumb. We could make these available to users of all our

mounts. I will experiment with some different shapes to see which would work



best and let you know the results.



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/







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

#5915 Oct 28, 2002

One solution would be for us to machine a rounded knob with or

> without the X portion for the thumb.



I strongly agree with this idea, I've had it happen to me. Perhaps a

slightly larger in diameter knob with thumb cutouts and more taper to

the edge. So that the edge of the knob is less that 50% of the

thickness of the cable. This would give room to tighten it with your

fingers and would allow the cable to slide over the knob.



Scott Hogsten



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

#5919 Oct 29, 2002

Add me to the notification list when you come up with one. I have

managed to get the cable caught twice but noticed it both times well

before it became an issue.



Rick.

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

> In a message dated 10/27/2002 12:58:11 PM Central Standard Time,

> jnomura@p... writes:

>

>

> > Hi, On a very few occasions I have had the Ra cable catch on Ra

clutch

> > knobs while making long slews where the mount switches from East

to

> > west

>

> One solution would be for us to machine a rounded knob with or

without the X

> portion for the thumb. We could make these available to users of

all our

> mounts. I will experiment with some different shapes to see which

would work

> best and let you know the results.

>

> Roland Christen

>

>

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



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

#5920 Oct 29, 2002

I had it catch a few times, also. One trick I have

used is to place the dew heater power cord in between

the mount and Dec cable, this helps keep it away 99%

of the time in my case.



Tim



--- observe_m13 JunkMailGoesHere@...> wrote: > Add me to the notification list when you come up

> with one. I have

> managed to get the cable caught twice but noticed it

> both times well

> before it became an issue.

>

> Rick.

>

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

> > In a message dated 10/27/2002 12:58:11 PM Central

> Standard Time,

> > jnomura@p... writes:

> >

> >

> > > Hi, On a very few occasions I have had the Ra

> cable catch on Ra

> clutch

> > > knobs while making long slews where the mount

> switches from East

> to

> > > west

> >

> > One solution would be for us to machine a rounded

> knob with or

> without the X

> > portion for the thumb. We could make these

> available to users of

> all our

> > mounts. I will experiment with some different

> shapes to see which

> would work

> > best and let you know the results.

> >

> > 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/

>

>





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

#5927 Oct 29, 2002

HI All,



I have just upladed 3 images showing how the Dec cable can be held in place

to prevent it from snagging. The modification consists of adding a cable

support up underneath the Dec area and replacing the two clutch knobs with a

special internal set screw. In the case of these images, I attached a cable

support to the Dec housing with some cable ties. The cable support is open

ended so that you can remove the cable when taking the mount down. The clutch

set screws are stainless steel 5/16-24 x 5/8" long with their ends machined

flat so they don't splay out the clutch plugs when pressure is applied.

Unfortunately, it will not be easy to produce a domed plug with thumb cutouts

in the manner that we are making them now. Therefore the internal set screw

is an inexpensive alternative.



I will be designing a small bracket to attch the cable support, and we will

be making a kit available with all the parts necessary to impliment this

change. I have tested this configuration all over the sky and the cable will

not snag on anything.



The only thing remaining is the possibility that the mount will tangle the

cable if allowed to run continuously at the sidereal rate. For this, one

could use a timer attached to the 110 volt input of your 12 volt power

supply, set to turn off at some wee hour in case you leave the scope running.

If you are using battery power, you would have to rig up a relay that will

open when the timer goes off. Another possibility is to attach a microswitch

to the bottom rear of the Polar axis housing. If you unscrew the 3.6"

diameter metal cover, you will find a retaining nut underneath with a number

of holes drilled. You can insert a small screw in one of the two holes that

can be used to activate the contacts of the microswitch. If you then wire the

12 volt power in series with the normally closed contacts of the switch, the

mount will shut down once the polar axis rotation has progressed to the point

where the switch is activated.



If there are some of you who would like a more elegant machined assembly with

switch built in, perhaps we can machine some for the two mounts. Let me know

what your thoughts are.



Roland Christen







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

#5928 Oct 29, 2002

I like the peace of mind a 'machined assembly with switch built in' would

provide, and if it's offered I'll get it. But since having a timer would be

nice for ending imaging runs at various times, it could solve both these

predicaments.



I'll likely be on battery power for a few more years so a prefabbed timer

relay would also be something I'd stand in line for.



I like making things myself but they always look like crap. Then you add in

other factors like an empty coffee thermos, 10 amps, some dew...



Kent Murley



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

#5929 Oct 29, 2002

Roland,

Providing an elegant machined assembly with built in switch is a great

idea! I would certainly be willing to buy this "upgrade". I suppose that

when these mounts were originally designed, CCD imaging was nowhere near as

popular as it is now. Also, remote operation was probably not as common.

Having some type of positive mount over-limit protection is certainly more

of a necessity today than it was in the past. The fact that you have

offered to fabricate such an attachment speaks volumes for the kind of

service you provide to your customers. This type of service is not found at

many companies today.



Regards,

Richard







>The only thing remaining is the possibility that the mount will tangle the

>cable if allowed to run continuously at the sidereal rate. For this, one

>could use a timer attached to the 110 volt input of your 12 volt power

>supply, set to turn off at some wee hour in case you leave the scope running.

>If you are using battery power, you would have to rig up a relay that will

>open when the timer goes off. Another possibility is to attach a microswitch

>to the bottom rear of the Polar axis housing. If you unscrew the 3.6"

>diameter metal cover, you will find a retaining nut underneath with a number

>of holes drilled. You can insert a small screw in one of the two holes that

>can be used to activate the contacts of the microswitch. If you then wire the

>12 volt power in series with the normally closed contacts of the switch, the

>mount will shut down once the polar axis rotation has progressed to the point

>where the switch is activated.

>

>If there are some of you who would like a more elegant machined assembly with

>switch built in, perhaps we can machine some for the two mounts. Let me know

>what your thoughts are.

>

>Roland Christen



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

#5930 Oct 29, 2002

Again I would be most interested as well. Could we perhaps go one step

better and try to come up with an overall cable management system. I

currently use a large "split" plastic wire conduit to organize all into a

large solitary cable and then have created a "sling" of a large wire tie to

try to hold the base of this cable centered over the controller to keep from

catching particularly with a mount flip. I now run a parallel cable to my

IMG camera, the ST4 cable, a 12v feed for the OTA fans, and a serial cable

to the filter wheel. I find that big culprits on the occasional catching of

cables is the design of the plug ins to the controller resulting in cables

emerging with moderate height perpendicular to the box and acting as a catch

point. One option is to run without the hand controller attached and this

would help but its nice to have to do some nudging to frame an image. I

wonder if a well designed bracket could be made to suspend the base of a

common cable out of the way of the control box and allow for reliable flips.

I see this as a much bigger issue as I migrate towards remote operation. I

had conceptualized the need for a camera to be watching the slew to abort if

needed.

Frankly, one advantage of the ME is cable management- I wonder if we

could really solve this problem. I would much appreciate a good solution.



Ludwig



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

From: Richard Seavey [mailto:reseavey@...]

Sent: Tuesday, October 29, 2002 2:41 PM

To: ap-gto@yahoogroups.com

Subject: Re: [ap-gto] Re: 1200GTO Ra Cable catches on Ra clutch knob





Roland,

Providing an elegant machined assembly with built in switch is a great

idea! I would certainly be willing to buy this "upgrade". I suppose that

when these mounts were originally designed, CCD imaging was nowhere near as

popular as it is now. Also, remote operation was probably not as common.

Having some type of positive mount over-limit protection is certainly more

of a necessity today than it was in the past. The fact that you have

offered to fabricate such an attachment speaks volumes for the kind of

service you provide to your customers. This type of service is not found at

many companies today.



Regards,

Richard







>The only thing remaining is the possibility that the mount will tangle the

>cable if allowed to run continuously at the sidereal rate. For this, one

>could use a timer attached to the 110 volt input of your 12 volt power

>supply, set to turn off at some wee hour in case you leave the scope

running. >If you are using battery power, you would have to rig up a relay that will

>open when the timer goes off. Another possibility is to attach a

microswitch >to the bottom rear of the Polar axis housing. If you unscrew the 3.6"

>diameter metal cover, you will find a retaining nut underneath with a

number >of holes drilled. You can insert a small screw in one of the two holes that

>can be used to activate the contacts of the microswitch. If you then wire

the >12 volt power in series with the normally closed contacts of the switch,

the >mount will shut down once the polar axis rotation has progressed to the

point >where the switch is activated.

>

>If there are some of you who would like a more elegant machined assembly

with >switch built in, perhaps we can machine some for the two mounts. Let me

know >what your thoughts are.

>

>Roland Christen







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

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

#5931 Oct 29, 2002

In a message dated 10/29/2002 5:00:17 PM Central Standard Time,

Ludwig@... writes:



> Frankly, one advantage of the ME is cable management- I wonder if we

> could really solve this problem. I would much appreciate a good solution.

>

> Ludwig

>

>



Not easily in a mount with clutches and the ability to be taken apart for

easy setup in the field. The ME and 1200 mounts are different animals.

Perhaps there is no future for a field mount with clutches? What say you

guys?



Roland Christen





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



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

#5932 Oct 29, 2002

Field mounting is essential for me. I'm still shooting film and have to

travel to dark skies. I'll probably continue this even when I start using

CCD because of the situation here in NJ just south of the big apple.



It would be nice if the AP mounts did a little better on cable managment but

it's not a "top drawer" issue for me. While the ME seems to do a fine job on

cable management, there are too many other things I don't like about it.



Steve...

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

From: chris1011@...>

To: ap-gto@yahoogroups.com>

Sent: Tuesday, October 29, 2002 7:02 PM

Subject: Re: [ap-gto] Re: 1200GTO Ra Cable catches on Ra clutch knob





> In a message dated 10/29/2002 5:00:17 PM Central Standard Time,

> Ludwig@... writes:

>

>

> > Frankly, one advantage of the ME is cable management- I wonder if we

> > could really solve this problem. I would much appreciate a good

solution.

> >

> > Ludwig

> >

> >

>

> Not easily in a mount with clutches and the ability to be taken apart for

> easy setup in the field. The ME and 1200 mounts are different animals.

> Perhaps there is no future for a field mount with clutches? What say you

> guys?

>

> 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/

>

>

>



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

#5933 Oct 29, 2002

I need to go home and see what my setup looks like cause I've had no

trouble with my Dec cable catching on my AP1200GTO. In fact I

thought it cleared the knobs throughout the normal range of motion.

I've also fell asleep and accidentally imaged about 4 hours past the

meridian one night and luckily my camera cleared the mount, but I

don't remember a problem with the cable tightening up too much.



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

#5934 Oct 29, 2002

I agree with Steve, IMO the 1200 is in many ways superior to the ME,

particularly when you value portability. This cable issue has never arisen

for me as I usually shoot on one side or the other for most of the night.



Please keep the clutches..............



Jim ----- Original Message -----

From: "Steve..." swalters@...>

To: ap-gto@yahoogroups.com>

Sent: Tuesday, October 29, 2002 4:24 PM

Subject: Re: [ap-gto] Re: 1200GTO Ra Cable catches on Ra clutch knob





> Field mounting is essential for me. I'm still shooting film and have to

> travel to dark skies. I'll probably continue this even when I start using

> CCD because of the situation here in NJ just south of the big apple.

>

> It would be nice if the AP mounts did a little better on cable managment

but

> it's not a "top drawer" issue for me. While the ME seems to do a fine job

on

> cable management, there are too many other things I don't like about it.

>

> Steve...

>

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

> From: chris1011@...>

> To: ap-gto@yahoogroups.com>

> Sent: Tuesday, October 29, 2002 7:02 PM

> Subject: Re: [ap-gto] Re: 1200GTO Ra Cable catches on Ra clutch knob

>

>

> > In a message dated 10/29/2002 5:00:17 PM Central Standard Time,

> > Ludwig@... writes:

> >

> >

> > > Frankly, one advantage of the ME is cable management- I wonder if we

> > > could really solve this problem. I would much appreciate a good

> solution.

> > >

> > > Ludwig

> > >

> > >

> >

> > Not easily in a mount with clutches and the ability to be taken apart

for

> > easy setup in the field. The ME and 1200 mounts are different animals.

> > Perhaps there is no future for a field mount with clutches? What say you

> > guys?

> >

> > 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/

>

>

>







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

#5935 Oct 29, 2002

I did not mean to imply that an ME type solution was possible but perhaps

an organizing bracket of some kind that would help assure a conflict free

slew. Perhaps as simple as a 90 deg angle plug to the servo controller to

allow cables to pass over without catching or possibly a smooth cover or

shield assembly.

I personally do not use the 1200 as a field mount as I have my 16" RC on it

and this is not conducive to portability. I actually would be just as happy

with a clutch free mount and completely locked down- how about the option

of set screws directly into a tapped inner race of the "clutch" to lock it

up- Just some thoughts :-)



Ludwig



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

From: chris1011@... [mailto:chris1011@...]

Sent: Tuesday, October 29, 2002 4:02 PM

To: ap-gto@yahoogroups.com

Subject: Re: [ap-gto] Re: 1200GTO Ra Cable catches on Ra clutch knob





In a message dated 10/29/2002 5:00:17 PM Central Standard Time,

Ludwig@... writes:



> Frankly, one advantage of the ME is cable management- I wonder if we

> could really solve this problem. I would much appreciate a good solution.

>

> Ludwig

>

>



Not easily in a mount with clutches and the ability to be taken apart for

easy setup in the field. The ME and 1200 mounts are different animals.

Perhaps there is no future for a field mount with clutches? What say you

guys?



Roland Christen





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





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

#5936 Oct 29, 2002

BTW would it not be reasonably simple to offer a "drilled" through spot

to lock up the mount and still allow the use of the clutches by removing

"locking pins"



Ludwig



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

From: chris1011@... [mailto:chris1011@...]

Sent: Tuesday, October 29, 2002 4:02 PM

To: ap-gto@yahoogroups.com

Subject: Re: [ap-gto] Re: 1200GTO Ra Cable catches on Ra clutch knob





In a message dated 10/29/2002 5:00:17 PM Central Standard Time,

Ludwig@... writes:



> Frankly, one advantage of the ME is cable management- I wonder if we

> could really solve this problem. I would much appreciate a good solution.

>

> Ludwig

>

>



Not easily in a mount with clutches and the ability to be taken apart for

easy setup in the field. The ME and 1200 mounts are different animals.

Perhaps there is no future for a field mount with clutches? What say you

guys?



Roland Christen





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





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

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

#5937 Oct 29, 2002

I use cloths pins. They hold all my cables to anything that is availiable to

tie them to, and will pop loose if they ever get in a bind.

Bobby Middleton



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

From: "Ludwig Allegra, MD" Ludwig@...>

> perhaps an organizing bracket of some kind that would help



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

#5938 Oct 29, 2002

In a message dated 10/29/2002 6:27:13 PM Central Standard Time,

swalters@... writes:



> It would be nice if the AP mounts did a little better on cable managment but

> it's not a "top drawer" issue for me.



I will post an image in the next few days that will show the best way to

manage cables from the back of a telescope without tangles.



Roland Christen





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



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

#5939 Oct 29, 2002

In a message dated 10/29/2002 6:57:47 PM Central Standard Time,

Ludwig@... writes:



>

>

> BTW would it not be reasonably simple to offer a "drilled" through spot

> to lock up the mount and still allow the use of the clutches by removing

> "locking pins"

>



Once you drill a hole in the clutch, then any of the present 4 cltch plugs

will fall into this hole when they line up with it. The hole will need to be

somewhere else.



Roland Christen





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



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

#5940 Oct 29, 2002

One cabling method that works well in preventing cables from catching or

rubbing on the servo controller and it's connectors is to run the cables

through woven polyester monofiliment sleeving. The sleeving can be obtained

from electronics supply houses such as Newark Electronics. The sleeving

material is extremely slippery and very flexible. It comes in diameters of

up to at least 2.5 inches. SPC Technology sells similar sleeving that can

be opened or closed along its length using "hook and loop" fastening.



Richard











At 08:23 PM 10/29/2002 -0500, you wrote: >In a message dated 10/29/2002 6:27:13 PM Central Standard Time,

>swalters@... writes:

>

>

> > It would be nice if the AP mounts did a little better on cable

> managment but

> > it's not a "top drawer" issue for me.

>

>I will post an image in the next few days that will show the best way to

>manage cables from the back of a telescope without tangles.

>

>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/







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

#5941 Oct 29, 2002

In following this tread, I find something very interesting.

jnomura2001 posts that he has experienced his "Ra Cable catches

on Ra

clutch knob" from that point on things start to happen. At this

point

in time the manufacturer of this fine instrument works on the

problem. Well, you know the rest of the story. But this reminds me of

a manager that I worked for some years back. in concluding our

weekly

Monday sales meeting, he would reiterate "see the customer, see

the

customer, see the customer" My congratulations to the entire

Astro-

Physics, Inc. employees and the staff.



Dennis Hahn

Anchorage, AK



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

#5942 Oct 29, 2002

I whole Heartedly agree. Roland has always been forthcoming with ideas

when a potential problem occurs. I am delighted with my AP900GTO and

look forward to many years with this fine instrument. I also look

forward to Roland's ideas on making his great products even better!



Steve



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

From: dlh49thstate [mailto:dhahn@...]

Sent: Tuesday, October 29, 2002 8:59 PM

To: ap-gto@yahoogroups.com

Subject: [ap-gto] Re: 1200GTO Ra Cable catches on Ra clutch knob





In following this tread, I find something very interesting.

jnomura2001 posts that he has experienced his "Ra Cable catches on Ra

clutch knob" from that point on things start to happen. At this point

in time the manufacturer of this fine instrument works on the

problem. Well, you know the rest of the story. But this reminds me of

a manager that I worked for some years back. in concluding our weekly

Monday sales meeting, he would reiterate "see the customer, see the

customer, see the customer" My congratulations to the entire

Astro-

Physics, Inc. employees and the staff.



Dennis Hahn

Anchorage, AK







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/



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

#5943 Oct 29, 2002

You'll never catch me going clutchless! (Well, in cars, maybe, but

mounts---never!) 1200 rocks!

Bert



Bert Katzung

katzung1@...

www.astronomy-images.com

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

From: chris1011@...>

To: ap-gto@yahoogroups.com>

Sent: Tuesday, October 29, 2002 4:02 PM

Subject: Re: [ap-gto] Re: 1200GTO Ra Cable catches on Ra clutch knob





> In a message dated 10/29/2002 5:00:17 PM Central Standard Time,

> Ludwig@... writes:

>

>

> > Frankly, one advantage of the ME is cable management- I wonder if we

> > could really solve this problem. I would much appreciate a good

solution.

> >

> > Ludwig

> >

> >

>

> Not easily in a mount with clutches and the ability to be taken apart for

> easy setup in the field. The ME and 1200 mounts are different animals.

> Perhaps there is no future for a field mount with clutches? What say you

> guys?

>

> 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/

>

>

>



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

#5944 Oct 29, 2002

The point about 90 degree cable plugs at the control box is a good one. I've

never had the cable catch on the clutch screws, but I do see my cables

dragging across the little thicket of cable connectors (especially the RS232

connector) sticking out of the control box. Again, nothing has ever snagged,

but they do drag sometimes. Maybe a second, optional position for the

control box that drops it down to the point that the cable connectors would

not be sticking up but out horizontally.

Bert



Bert Katzung

katzung1@...

www.astronomy-images.com

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

From: "Ludwig Allegra, MD" Ludwig@...>

To: ap-gto@yahoogroups.com>

Sent: Tuesday, October 29, 2002 4:59 PM

Subject: RE: [ap-gto] Re: 1200GTO Ra Cable catches on Ra clutch knob





> I did not mean to imply that an ME type solution was possible but

perhaps

> an organizing bracket of some kind that would help assure a conflict free

> slew. Perhaps as simple as a 90 deg angle plug to the servo controller to

> allow cables to pass over without catching or possibly a smooth cover or

> shield assembly.

> I personally do not use the 1200 as a field mount as I have my 16" RC on

it

> and this is not conducive to portability. I actually would be just as

happy

> with a clutch free mount and completely locked down- how about the option

> of set screws directly into a tapped inner race of the "clutch" to lock it

> up- Just some thoughts :-)

>

> Ludwig

>



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

#5945 Oct 29, 2002

Is there some reason the clutch screws could not be removed and replaced

with an allen screw that was flush with the housing?



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

From: "Bert Katzung" katzung1@...>

To: ap-gto@yahoogroups.com>

Sent: Tuesday, October 29, 2002 9:14 PM

Subject: Re: [ap-gto] Re: 1200GTO Ra Cable catches on Ra clutch knob





> The point about 90 degree cable plugs at the control box is a good one.

I've

> never had the cable catch on the clutch screws, but I do see my cables

> dragging across the little thicket of cable connectors (especially the

RS232

> connector) sticking out of the control box. Again, nothing has ever

snagged,

> but they do drag sometimes. Maybe a second, optional position for the

> control box that drops it down to the point that the cable connectors

would

> not be sticking up but out horizontally.

> Bert

>

> Bert Katzung

> katzung1@...

> www.astronomy-images.com

>

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

> From: "Ludwig Allegra, MD" Ludwig@...>

> To: ap-gto@yahoogroups.com>

> Sent: Tuesday, October 29, 2002 4:59 PM

> Subject: RE: [ap-gto] Re: 1200GTO Ra Cable catches on Ra clutch knob

>

>

> > I did not mean to imply that an ME type solution was possible but

> perhaps

> > an organizing bracket of some kind that would help assure a conflict

free

> > slew. Perhaps as simple as a 90 deg angle plug to the servo controller

to

> > allow cables to pass over without catching or possibly a smooth cover or

> > shield assembly.

> > I personally do not use the 1200 as a field mount as I have my 16" RC on

> it

> > and this is not conducive to portability. I actually would be just as

> happy

> > with a clutch free mount and completely locked down- how about the

option

> > of set screws directly into a tapped inner race of the "clutch" to lock

it

> > up- Just some thoughts :-)

> >

> > Ludwig

> >

>

>

>

>

> 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/

>

>

>







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

#5946 Oct 29, 2002

Roland,

Could a low profile "cap" be made to fit over the X knobs so that for adjustment you would lift off the cap and then replace for normal operation. The caps could be made out of the same

material as the current knobs. A set of these could be made available at a price determined by the demand. The design would allow any size cable to slide over it without catching, if that situation

arose.



On Wed, 30 Oct 2002 01:03:45 +0000, ap-gto@yahoogroups.com wrote:



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

>

>Message: 1

> Date: Mon, 28 Oct 2002 12:58:38 EST

> From: chris1011@...

>Subject: Re: 1200GTO Ra Cable catches on Ra clutch knob

>

>In a message dated 10/27/2002 12:58:11 PM Central Standard Time,

>jnomura@... writes:

>

>

>> Hi, On a very few occasions I have had the Ra cable catch on Ra clutch

>> knobs while making long slews where the mount switches from East to

>> west

>

>One solution would be for us to machine a rounded knob with or without the X

>portion for the thumb. We could make these available to users of all our

>mounts. I will experiment with some different shapes to see which would work

>best and let you know the results.

>

>Roland Christen





Clear Skies ......



Klaatu Barada Nikto ...



Frank S Barnes III

TwinOaks Observatory

WWW.SkyImager.Com

SBarnes@...



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

#5947 Oct 29, 2002

In a message dated 10/29/2002 9:00:49 PM Central Standard Time,

SBarnes@... writes:



> Could a low profile "cap" be made to fit over the X knobs so that for

> adjustment you would lift off the cap and then replace for normal

> operation. The caps could be made out of the same

> material as the current knobs. A set of these could be made available at a

> price determined by the demand. The design would allow any size cable to

> slide over it without catching, if that situation

> arose.

>



Maybe. Sounds like it's worth a try.



Roland Christen





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



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

#5948 Oct 29, 2002

In a message dated 10/29/2002 8:34:59 PM Central Standard Time,

michaelgrady@... writes:



> Is there some reason the clutch screws could not be removed and replaced

> with an allen screw that was flush with the housing?

>

>



Go to the files section and click on the "1200 Mount Modifications"



Roland Christen





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



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

#5949 Oct 29, 2002

Very good!



Is that a couple of small black "wire ties" holding the cable stay?



I like the low profile clutch tensioner idea! What length and thread

spec are they? Will you have an "accessory" pack available soon?



Isn't digital photography grand? ;-)



Mark





On Tuesday, October 29, 2002, at 09:58 PM, chris1011@... wrote:



> In a message dated 10/29/2002 8:34:59 PM Central Standard Time,

> michaelgrady@... writes:

>

>

>> Is there some reason the clutch screws could not be removed and

>> replaced

>> with an allen screw that was flush with the housing?

>>

>>

>

> Go to the files section and click on the "1200 Mount Modifications"

>

> 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/

>

>

>



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

#5950 Oct 29, 2002

Not sure where i can find the 'files section'....thanks Roland ----- Original Message -----

From: chris1011@...>

To: ap-gto@yahoogroups.com>

Sent: Tuesday, October 29, 2002 10:58 PM

Subject: Re: [ap-gto] Re: 1200GTO Ra Cable catches on Ra clutch knob





> In a message dated 10/29/2002 8:34:59 PM Central Standard Time,

> michaelgrady@... writes:

>

>

> > Is there some reason the clutch screws could not be removed and replaced

> > with an allen screw that was flush with the housing?

> >

> >

>

> Go to the files section and click on the "1200 Mount Modifications"

>

> 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/

>

>



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

#5951 Oct 29, 2002

Michael,



Go to the Yahoo groups web page for this group. Click on the "FIles"

link on the left. The 1200 Mount Modifications folder is right at the

top.



HTH



Mark

On Tuesday, October 29, 2002, at 10:24 PM, michael grady wrote:



> Not sure where i can find the 'files section'....thanks Roland

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

> From: chris1011@...>

> To: ap-gto@yahoogroups.com>

> Sent: Tuesday, October 29, 2002 10:58 PM

> Subject: Re: [ap-gto] Re: 1200GTO Ra Cable catches on Ra clutch knob

>

>

>> In a message dated 10/29/2002 8:34:59 PM Central Standard Time,

>> michaelgrady@... writes:

>>

>>

>>> Is there some reason the clutch screws could not be removed and

>>> replaced

>>> with an allen screw that was flush with the housing?

>>>

>>>

>>

>> Go to the files section and click on the "1200 Mount Modifications"

>>

>> 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/

>

>

>







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

#5952 Oct 29, 2002

Wow,

I didn't expect this much action from my post. I am truly impressed

with Roland taking such a proactive position on this. This is one of

many reasons Astro physics has such a outstanding reputation.

I took another good look at my mount again and found the clutch knob

to be .42" in height so a thick cable would have to be over 7/8" in

diameter - not the best option. Did try to stiffen the cable by

sliting a 1/2" od tube and placing it over the cable. This seems to

keep the cable off the knobs but makes the cable stiff enough to cause

the cable entry points to the connectors to bend a lot and possibly

cause early breakage of the cable. The cap idea has potential if the

clearence to the DEC motor housing can be solved as the RA knobs pass

very close to this housing (not much room for any type of bevel).

After pondering a bit and swinging the RA back and forth a hundred

times it became apparent that the top edge of the RA housing is

supposed to push the cable away as it passes over it. This does indeed

work almost all the time. If the cable rests on the edge for a long

period of time it tends to relax and fold over the edge and could

possibly snag the knob. It seems that warm weather would make this

worse as the cable would be softer. A solution migh be in beefing up

the origional design by simply applying a strip about 3/8" to 1/2"

tall around the RA housing that would simply push/guide the cable

over the knobs. Plastic strips applied with double sided foam tape

might do. Of course the strips would be beveled so as to be very short

at the ends and tallest when passing by the knobs. When I get a chance

I may stop by TAP Plastics and get some 3/8" square nylon rod and give

it a test.



A future enhancment might be to recess the clutch knobs into the Ra

housing.



Keep putting the ideas out there,

Jim



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

#5953 Oct 29, 2002

I checked and my Dec cable doesn't touch the Dec assembly throughout

the range of travel. Here's a few shots of how my cable hangs. I

took them at night with a flash so the background is a little dark.

The 3rd shot shows the mount completely upside down with the scope

past the meridian all the way to the western horizon. That's what I

love about this mount, I've never had to flip the mount during an

image.

www.threebuttes.com/images/Mount_1.jpg

www.threebuttes.com/images/Mount_2.jpg

www.threebuttes.com/images/Mount_3.jpg



Gil Jones

--- In ap-gto@y..., "Gil Jones" gil@t...> wrote:

> I need to go home and see what my setup looks like cause I've had

no

> trouble with my Dec cable catching on my AP1200GTO. In fact I

> thought it cleared the knobs throughout the normal range of

motion.

> I've also fell asleep and accidentally imaged about 4 hours past

the

> meridian one night and luckily my camera cleared the mount, but I

> don't remember a problem with the cable tightening up too much.



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

#5955 Oct 29, 2002

I meant to say it doesn't touch the RA assembly. I also have my

cables from my camera inside a piece of split corrugated plastic

tubing like others mentioned. It's velcro tied to the scope handle

on one end and the encoder cable connector at the mount which helps

the whole cable assembly slide over when the scope if flipped. I'll

have to take some daytime pictures of my setup.

--- In ap-gto@y..., "Gil Jones" gil@t...> wrote:

> I checked and my Dec cable doesn't touch the Dec assembly

throughout

> the range of travel. Here's a few shots of how my cable hangs. I

> took them at night with a flash so the background is a little

dark.

> The 3rd shot shows the mount completely upside down with the scope

> past the meridian all the way to the western horizon. That's what

I

> love about this mount, I've never had to flip the mount during an

> image.

> www.threebuttes.com/images/Mount_1.jpg

> www.threebuttes.com/images/Mount_2.jpg

> www.threebuttes.com/images/Mount_3.jpg

>

> Gil Jones

>

> --- In ap-gto@y..., "Gil Jones" gil@t...> wrote:

> > I need to go home and see what my setup looks like cause I've

had

> no

> > trouble with my Dec cable catching on my AP1200GTO. In fact I

> > thought it cleared the knobs throughout the normal range of

> motion.

> > I've also fell asleep and accidentally imaged about 4 hours past

> the

> > meridian one night and luckily my camera cleared the mount, but

I

> > don't remember a problem with the cable tightening up too much.



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

#5960 Oct 30, 2002

OK, I like the cable tie and plastic / nylon cable loop, but the

recessed 'set-screw' tension adjustment isn't really an option for

those of us who move our equipment to dark sky sites and use

different OTA's on the mount. Having to use a hex key to tighten down

the adjusters would be a pain under these circumstances. I would

still prefer a knob re-design or secondarily, since it might get in

the way of access to the knob, a cap or some kind of plastic 'wedge'

that could be double sided taped to the mount underneath the

offending knob to guide the cable over the knob. How about a heavy

duty knob version of the RA and DEC 'damper' adjustment knobs. They

would lie essentially flush at their base on the mount surface yet

still have a large 'grippable' surface for tightening.



Rick.

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

> In a message dated 10/29/2002 8:34:59 PM Central Standard Time,

> michaelgrady@w... writes:

>

>

> > Is there some reason the clutch screws could not be removed and

replaced

> > with an allen screw that was flush with the housing?

> >

> >

>

> Go to the files section and click on the "1200 Mount Modifications"

>

> Roland Christen

>

>

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







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

#5962 Oct 30, 2002

If there are some of you who would like a more elegant machined

assembly with > switch built in, perhaps we can machine some for the two mounts.

Let me know > what your thoughts are.

>



Yes, I would certainly go for the 'factory' machined switch assembly!

As to the timer shut-off option, could there be a way of integrating

that into the controller?



> Not easily in a mount with clutches and the ability to be taken

apart for > easy setup in the field. The ME and 1200 mounts are different

animals. > Perhaps there is no future for a field mount with clutches? What

say you > guys?



My personal preference is to keep the clutch system. Although I tend

to use goto all of the time for imaging, there are those days when it

seems that doing a manual PAS or quick drift alignment is good enough

for visual work. I loosen off the clutches to the point where the

scope manually moves like butter, locating the objects I want through

the finder with the keypad tucked out of the way on the base of the

mount, never to be touched during the session.



Rick.



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

#6307 Dec 27, 2002

Roland,



Are the clutch set screws the same for the 900 as the 1200? I recently

caught my camera cable between the clutch knob and the RA motor housing,

damaging the cable. I would like to replace the knobs with set screws.

Below you mention a kit, will that include the set screws as well as the

bracket?



I did follow your advice on placing the cables according to the ISS-AT

photo's in the events section on the AP web site. However my 900 GTO

mount is permanently setup and when not in use the camera cable was

draped over the mount. I moved the mount before removing the cable only

to catch it between the knob and motor cover.



Dan

On Tue, 29 Oct 2002 12:41:00 EST, Roland wrote:



>HI All,

>

>I have just upladed 3 images showing how the Dec cable can be held in place

>to prevent it from snagging. The modification consists of adding a cable

>support up underneath the Dec area and replacing the two clutch knobs with a

>special internal set screw. In the case of these images, I attached a cable

>support to the Dec housing with some cable ties. The cable support is open

>ended so that you can remove the cable when taking the mount down. The clutch

>set screws are stainless steel 5/16-24 x 5/8" long with their ends machined

>flat so they don't splay out the clutch plugs when pressure is applied.

>Unfortunately, it will not be easy to produce a domed plug with thumb cutouts

>in the manner that we are making them now. Therefore the internal set screw

>is an inexpensive alternative.

>

>I will be designing a small bracket to attch the cable support, and we will

>be making a kit available with all the parts necessary to impliment this

>change. I have tested this configuration all over the sky and the cable will

>not snag on anything.

>

>The only thing remaining is the possibility that the mount will tangle the

>cable if allowed to run continuously at the sidereal rate. For this, one

>could use a timer attached to the 110 volt input of your 12 volt power

>supply, set to turn off at some wee hour in case you leave the scope running.

>If you are using battery power, you would have to rig up a relay that will

>open when the timer goes off. Another possibility is to attach a microswitch

>to the bottom rear of the Polar axis housing. If you unscrew the 3.6"

>diameter metal cover, you will find a retaining nut underneath with a number

>of holes drilled. You can insert a small screw in one of the two holes that

>can be used to activate the contacts of the microswitch. If you then wire the

>12 volt power in series with the normally closed contacts of the switch, the

>mount will shut down once the polar axis rotation has progressed to the point

>where the switch is activated.

>

>If there are some of you who would like a more elegant machined assembly with

>switch built in, perhaps we can machine some for the two mounts. Let me know

>what your thoughts are.

>

>Roland Christen

>

>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/

>



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

#6308 Dec 28, 2002

In a message dated 12/27/2002 7:44:07 PM Central Standard Time,

dhkaiser@... writes:



> Are the clutch set screws the same for the 900 as the 1200? I recently

> caught my camera cable between the clutch knob and the RA motor housing,

> damaging the cable. I would like to replace the knobs with set screws.

> Below you mention a kit, will that include the set screws as well as the

> bracket



Yes, the screws are the same. We have the screws available. Contact Christine

on Monday and she can send you as many as you need.



Roland Christen





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



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

#6310 Dec 28, 2002

Roland

Is the kit with the small bracket you referred to back in October ready?

Joe



On Saturday, December 28, 2002, at 10:53 AM, chris1011@... wrote:



> In a message dated 12/27/2002 7:44:07 PM Central Standard Time,

> dhkaiser@... writes:

>

>

>> Are the clutch set screws the same for the 900 as the 1200? I

>> recently

>> caught my camera cable between the clutch knob and the RA motor

>> housing,

>> damaging the cable. I would like to replace the knobs with set

>> screws.

>> Below you mention a kit, will that include the set screws as well as

>> the

>> bracket

>

> Yes, the screws are the same. We have the screws available. Contact

> Christine

> on Monday and she can send you as many as you need.

>

> 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/

>

>







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

#6315 Dec 30, 2002

In a message dated 12/28/2002 9:43:53 PM Central Standard Time,

jmarietta@... writes:



>

> Roland

> Is the kit with the small bracket you referred to back in October ready?

> Joe

>



We are selling the set screws only. The bracket is not needed as we found out

with the ISSAT setup.



Roland Christen





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



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

#7270 Apr 29, 2003

Roland,



Do you have any plans on making the clutch set screws that won't

catch for the AP900? We have the same issue, you know, with cables

catching on the clutch knobs as on the AP1200. A cable caught on mine

during a slew and I didn't know it until I turned on the lights.

Meridian flips and short cable runs are not for the faint of heart

when you can't see in the dark.

Thanks.



Gerald.

--- In ap-gto@yahoogroups.com, chris1011@a... wrote:

> HI All,

>

> I have just upladed 3 images showing how the Dec cable can be held

in place

> to prevent it from snagging. The modification consists of adding a

cable

> support up underneath the Dec area and replacing the two clutch

knobs with a

> special internal set screw. In the case of these images, I attached

a cable

> support to the Dec housing with some cable ties. The cable support

is open

> ended so that you can remove the cable when taking the mount down.

The clutch

> set screws are stainless steel 5/16-24 x 5/8" long with their ends

machined

> flat so they don't splay out the clutch plugs when pressure is

applied.

> Unfortunately, it will not be easy to produce a domed plug with

thumb cutouts

> in the manner that we are making them now. Therefore the internal

set screw

> is an inexpensive alternative.

>

> I will be designing a small bracket to attch the cable support, and

we will

> be making a kit available with all the parts necessary to impliment

this

> change. I have tested this configuration all over the sky and the

cable will

> not snag on anything.

>

> The only thing remaining is the possibility that the mount will

tangle the

> cable if allowed to run continuously at the sidereal rate. For

this, one

> could use a timer attached to the 110 volt input of your 12 volt

power

> supply, set to turn off at some wee hour in case you leave the

scope running.

> If you are using battery power, you would have to rig up a relay

that will

> open when the timer goes off. Another possibility is to attach a

microswitch

> to the bottom rear of the Polar axis housing. If you unscrew the

3.6"

> diameter metal cover, you will find a retaining nut underneath with

a number

> of holes drilled. You can insert a small screw in one of the two

holes that

> can be used to activate the contacts of the microswitch. If you

then wire the

> 12 volt power in series with the normally closed contacts of the

switch, the

> mount will shut down once the polar axis rotation has progressed to

the point

> where the switch is activated.

>

> If there are some of you who would like a more elegant machined

assembly with

> switch built in, perhaps we can machine some for the two mounts.

Let me know

> what your thoughts are.

>

> Roland Christen



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

#7271 Apr 29, 2003

In a message dated 4/29/2003 2:26:24 PM Central Daylight Time,

grmok1@... writes:



> Do you have any plans on making the clutch set screws that won't

> catch for the AP900? We have the same issue, you know, with cables

> catching on the clutch knobs as on the AP1200. A cable caught on mine

> during a slew and I didn't know it until I turned on the lights



The same screws can be used for the 900 that we supply for the 1200. They are

the same size. All you need is 2 screws. Contact Christine and she will send

you some.



Roland Christen





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



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

#7272 Apr 29, 2003

Roland,



Thanks; I did contact Christine last week and she thought they were a

different size. I'll call her and tell her to send me some.



May I ask why do you just need only two screws when there are 4

clutches? Which two do I replace, or does it matter?



Gerald



--- In ap-gto@yahoogroups.com, chris1011@a... wrote:

> In a message dated 4/29/2003 2:26:24 PM Central Daylight Time,

> grmok1@s... writes:

>

>

> > Do you have any plans on making the clutch set screws that won't

> > catch for the AP900? We have the same issue, you know, with

cables

> > catching on the clutch knobs as on the AP1200. A cable caught on

mine

> > during a slew and I didn't know it until I turned on the lights

>

> The same screws can be used for the 900 that we supply for the

1200. They are

> the same size. All you need is 2 screws. Contact Christine and she

will send

> you some.

>

> Roland Christen

>

>

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







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

#7273 Apr 29, 2003

In a message dated 4/29/2003 4:15:15 PM Central Daylight Time,

grmok1@... writes:



> May I ask why do you just need only two screws when there are 4

> clutches? Which two do I replace, or does it matter?

>



As you look at the mount from the back, it would be the two on the left where

the wire hangs. The other side never comes far enough around to catch

anyhting.



Roland Christen





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



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

#7274 Apr 29, 2003

Hi Gerald,



I put the screws on my 900, and they work great! Maybe there is a

better way to do it, but I put them on the West side of the mount.

That is the side I bring my cables out on, and you then won't catch

the cables when you slew, and as the mount runs in RA you're adding

slack to the cables on that side (can't catch much there). If you

run your cables for some reason on the east side, and don't want to

change.....I'd put the flush set screws over there (there may still

be a chance to catch the DEC servo cable if you do that though).

The existing screws don't need to be replaced on the other side if

there are no cables snag.



My $.02....and over priced at that!



Mike

--- In ap-gto@yahoogroups.com, "gmillerok" grmok1@s...> wrote:

> Roland,

>

> Thanks; I did contact Christine last week and she thought they

were a

> different size. I'll call her and tell her to send me some.

>

> May I ask why do you just need only two screws when there are 4

> clutches? Which two do I replace, or does it matter?

>

> Gerald

>

>

> --- In ap-gto@yahoogroups.com, chris1011@a... wrote:

> > In a message dated 4/29/2003 2:26:24 PM Central Daylight Time,

> > grmok1@s... writes:

> >

> >

> > > Do you have any plans on making the clutch set screws that

won't

> > > catch for the AP900? We have the same issue, you know, with

> cables

> > > catching on the clutch knobs as on the AP1200. A cable caught

on

> mine

> > > during a slew and I didn't know it until I turned on the lights

> >

> > The same screws can be used for the 900 that we supply for the

> 1200. They are

> > the same size. All you need is 2 screws. Contact Christine and

she

> will send

> > you some.

> >

> > Roland Christen

> >

> >

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



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

#7397 May 8, 2003

I'll buy a kit as soon as you offer.



Thanks,

John R. Jennings



--- In ap-gto@yahoogroups.com, "gmillerok" grmok1@s...> wrote:

> Roland,

>

> Do you have any plans on making the clutch set screws that won't

> catch for the AP900? We have the same issue, you know, with cables

> catching on the clutch knobs as on the AP1200. A cable caught on

mine

> during a slew and I didn't know it until I turned on the lights.

> Meridian flips and short cable runs are not for the faint of heart

> when you can't see in the dark.

> Thanks.

>

> Gerald.

>

> --- In ap-gto@yahoogroups.com, chris1011@a... wrote:

> > HI All,

> >

> > I have just upladed 3 images showing how the Dec cable can be

held

> in place

> > to prevent it from snagging. The modification consists of adding

a

> cable

> > support up underneath the Dec area and replacing the two clutch

> knobs with a

> > special internal set screw. In the case of these images, I

attached

> a cable

> > support to the Dec housing with some cable ties. The cable

support

> is open

> > ended so that you can remove the cable when taking the mount

down.

> The clutch

> > set screws are stainless steel 5/16-24 x 5/8" long with their

ends

> machined

> > flat so they don't splay out the clutch plugs when pressure is

> applied.

> > Unfortunately, it will not be easy to produce a domed plug with

> thumb cutouts

> > in the manner that we are making them now. Therefore the internal

> set screw

> > is an inexpensive alternative.

> >

> > I will be designing a small bracket to attch the cable support,

and

> we will

> > be making a kit available with all the parts necessary to

impliment

> this

> > change. I have tested this configuration all over the sky and the

> cable will

> > not snag on anything.

> >

> > The only thing remaining is the possibility that the mount will

> tangle the

> > cable if allowed to run continuously at the sidereal rate. For

> this, one

> > could use a timer attached to the 110 volt input of your 12 volt

> power

> > supply, set to turn off at some wee hour in case you leave the

> scope running.

> > If you are using battery power, you would have to rig up a relay

> that will

> > open when the timer goes off. Another possibility is to attach a

> microswitch

> > to the bottom rear of the Polar axis housing. If you unscrew the

> 3.6"

> > diameter metal cover, you will find a retaining nut underneath

with

> a number

> > of holes drilled. You can insert a small screw in one of the two

> holes that

> > can be used to activate the contacts of the microswitch. If you

> then wire the

> > 12 volt power in series with the normally closed contacts of the

> switch, the

> > mount will shut down once the polar axis rotation has progressed

to

> the point

> > where the switch is activated.

> >

> > If there are some of you who would like a more elegant machined

> assembly with

> > switch built in, perhaps we can machine some for the two mounts.

> Let me know

> > what your thoughts are.

> >

> > Roland Christen







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

#7398 May 8, 2003

In a message dated 5/8/2003 7:24:45 PM Central Daylight Time,

jennings0002@... writes:



>

> I'll buy a kit as soon as you offer.

>

> Thanks,

> John R. Jennings

>

>



Just contact Christine and she'll send you the screws to solve your problem

with the wires catching. They're in stock.



Roland Christen





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


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