Date   

Re: AP1100, Berlebach Planet, mounting CP4

ap@CaptivePhotons.com
 

  • M Hambric wrote:  if you find that this is a problem you can try Nord-Lok washers. These worked for me.

Thanks for that pointer, I was wondering what you meant.  Looks good.

 


Re: AP1100, Berlebach Planet, mounting CP4

M Hambrick
 

I think that the machining tolerances on your mount base adapter are pretty tight, and that will help to minimize the potential for the mount to shift. However, if you find that this is a problem you can try Nord-Lok washers. These worked for me.

Mike


Re: Debugging Dec failure to move w/1200 CP3

Steven Panish
 

Thanks guys.  I will try to provoke the issue and then swap the RA and DEC to get the problem to move.  The cable would be the easiest to fix so I hope that's it!  

Steve

On Thu, Jul 29, 2021 at 12:01 PM Liam Plybon <liam@...> wrote:
That is exactly what George means. We are trying to determine if the issue follows the motor itself, indicating a bad motor, or the wire harness. If it follows the wire harness, then the issue is either the harness itself or the CP3. If the problem only occurs when the cable is moved a certain way, then the harness itself should be the issue.

Liam Plybon
Astro-Physics

-----Original Message-----
From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Dale Ghent
Sent: Thursday, July 29, 2021 10:45 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Debugging Dec failure to move w/1200 CP3


Right. What George is saying is that you can unplug the dec cable from the dec motor and plug it into the RA motor. If the problem follows with the cable move, then the issue is quite likely a cable problem - a broken internal wire or solder connection inside the connector.

Sure you can take a multimeter to each pin and test for continuity but you might need that 3rd hand to flop the cable around while you test each pin's continuity because the issue might rear its head only when the cable is flexing under movement. Just swapping it to the RA motor  and trying to induce the issue there is often a quicker way to determine this.

> On Jul 29, 2021, at 11:13, Steven Panish <scpanish@...> wrote:
>
> George,
> Not likely.  The problem is only on DEC.  RA is unaffected and when DEC is failing I can nudge in DEC just fine, and tracking is fine (in RA).  So I don't see how it could be the 12V power to the CP3.  I think it has to be either in the CP3 guts outward to the  DEC motor.  I'll do the cable swap and maybe ohm out the cable first.
>
> Are there any known points of failure in that path?
>
> Steve
>
> On Thu, Jul 29, 2021 at 11:00 AM George <george@...> wrote:
> Steve,
>
>
>
> Remove the power cable from the CP3 control box and note that the center pin is a split pin.   Spread the two halves with a jeweler’s screwdriver or the tip of a knife blade.   See if you still encounter an issue.   If you do, then reverse the RA and Dec cables and see if the issue is with the RA instead of the Dec.   
>
>
>
> Let me know directly at my AP email below.
>
>
>
> Regards,
>
>
>
> George
>
>
>
> George Whitney
>
> Astro-Physics, Inc.
>
> Phone:  815-222-6538 (direct line)
>
> Phone:  815-282-1513 (office)
>
> Email:  george@...
>
>
>
> From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Steven Panish
> Sent: Thursday, July 29, 2021 9:54 AM
> To: main@ap-gto.groups.io
> Subject: Re: [ap-gto] Debugging Dec failure to move w/1200 CP3
>
>
>
> Although now that I think about it, swapping will be tough test.  The problem comes and goes intermittently.  I may have to wait for it to really break.  Maybe flexing the wires would provoke it.
>
>
>
> STeve
>
>
>
> On Thu, Jul 29, 2021 at 10:49 AM Steve Panish <scpanish@...> wrote:
>
> Good idea Dale.  I dont' know the pinout, so wasn't aware this would be possible.
>
>
>
> On Thu, Jul 29, 2021 at 9:49 AM Dale Ghent <daleg@...> wrote:
>
>
> Could be the dec cable has developed a connection fault in the form of a broken wire. Swap it with the RA cable and see if moving the dec axis continues to have problems.
>
> > On Jul 29, 2021, at 09:42, Steven Panish <scpanish@...> wrote:
> >
> > Help!  My 1200 CP3 is intermittently not responding to DEC move commands, either manually from the V2 driver window or the handbox, or via PHD2.  I've unplugged the DEC motor connections and put contact cleaner on the exposed pins, which did not help. Would appreciate help debugging.  It happens a couple times per evening and resolves itself after a minute or two.
> >
> > thanks,
> > Steve
> >
>
>
>
>
>
>
>
>
>












Re: Debugging Dec failure to move w/1200 CP3

 

That is exactly what George means. We are trying to determine if the issue follows the motor itself, indicating a bad motor, or the wire harness. If it follows the wire harness, then the issue is either the harness itself or the CP3. If the problem only occurs when the cable is moved a certain way, then the harness itself should be the issue.

Liam Plybon
Astro-Physics

-----Original Message-----
From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Dale Ghent
Sent: Thursday, July 29, 2021 10:45 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Debugging Dec failure to move w/1200 CP3


Right. What George is saying is that you can unplug the dec cable from the dec motor and plug it into the RA motor. If the problem follows with the cable move, then the issue is quite likely a cable problem - a broken internal wire or solder connection inside the connector.

Sure you can take a multimeter to each pin and test for continuity but you might need that 3rd hand to flop the cable around while you test each pin's continuity because the issue might rear its head only when the cable is flexing under movement. Just swapping it to the RA motor and trying to induce the issue there is often a quicker way to determine this.

On Jul 29, 2021, at 11:13, Steven Panish <scpanish@panishnet.com> wrote:

George,
Not likely. The problem is only on DEC. RA is unaffected and when DEC is failing I can nudge in DEC just fine, and tracking is fine (in RA). So I don't see how it could be the 12V power to the CP3. I think it has to be either in the CP3 guts outward to the DEC motor. I'll do the cable swap and maybe ohm out the cable first.

Are there any known points of failure in that path?

Steve

On Thu, Jul 29, 2021 at 11:00 AM George <george@astro-physics.com> wrote:
Steve,



Remove the power cable from the CP3 control box and note that the center pin is a split pin. Spread the two halves with a jeweler’s screwdriver or the tip of a knife blade. See if you still encounter an issue. If you do, then reverse the RA and Dec cables and see if the issue is with the RA instead of the Dec.



Let me know directly at my AP email below.



Regards,



George



George Whitney

Astro-Physics, Inc.

Phone: 815-222-6538 (direct line)

Phone: 815-282-1513 (office)

Email: george@astro-physics.com



From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Steven Panish
Sent: Thursday, July 29, 2021 9:54 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Debugging Dec failure to move w/1200 CP3



Although now that I think about it, swapping will be tough test. The problem comes and goes intermittently. I may have to wait for it to really break. Maybe flexing the wires would provoke it.



STeve



On Thu, Jul 29, 2021 at 10:49 AM Steve Panish <scpanish@panishnet.com> wrote:

Good idea Dale. I dont' know the pinout, so wasn't aware this would be possible.



On Thu, Jul 29, 2021 at 9:49 AM Dale Ghent <daleg@elemental.org> wrote:


Could be the dec cable has developed a connection fault in the form of a broken wire. Swap it with the RA cable and see if moving the dec axis continues to have problems.

On Jul 29, 2021, at 09:42, Steven Panish <scpanish@panishnet.com> wrote:

Help! My 1200 CP3 is intermittently not responding to DEC move commands, either manually from the V2 driver window or the handbox, or via PHD2. I've unplugged the DEC motor connections and put contact cleaner on the exposed pins, which did not help. Would appreciate help debugging. It happens a couple times per evening and resolves itself after a minute or two.

thanks,
Steve








Re: Debugging Dec failure to move w/1200 CP3

Dale Ghent
 

Right. What George is saying is that you can unplug the dec cable from the dec motor and plug it into the RA motor. If the problem follows with the cable move, then the issue is quite likely a cable problem - a broken internal wire or solder connection inside the connector.

Sure you can take a multimeter to each pin and test for continuity but you might need that 3rd hand to flop the cable around while you test each pin's continuity because the issue might rear its head only when the cable is flexing under movement. Just swapping it to the RA motor and trying to induce the issue there is often a quicker way to determine this.

On Jul 29, 2021, at 11:13, Steven Panish <scpanish@panishnet.com> wrote:

George,
Not likely. The problem is only on DEC. RA is unaffected and when DEC is failing I can nudge in DEC just fine, and tracking is fine (in RA). So I don't see how it could be the 12V power to the CP3. I think it has to be either in the CP3 guts outward to the DEC motor. I'll do the cable swap and maybe ohm out the cable first.

Are there any known points of failure in that path?

Steve

On Thu, Jul 29, 2021 at 11:00 AM George <george@astro-physics.com> wrote:
Steve,



Remove the power cable from the CP3 control box and note that the center pin is a split pin. Spread the two halves with a jeweler’s screwdriver or the tip of a knife blade. See if you still encounter an issue. If you do, then reverse the RA and Dec cables and see if the issue is with the RA instead of the Dec.



Let me know directly at my AP email below.



Regards,



George



George Whitney

Astro-Physics, Inc.

Phone: 815-222-6538 (direct line)

Phone: 815-282-1513 (office)

Email: george@astro-physics.com



From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Steven Panish
Sent: Thursday, July 29, 2021 9:54 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Debugging Dec failure to move w/1200 CP3



Although now that I think about it, swapping will be tough test. The problem comes and goes intermittently. I may have to wait for it to really break. Maybe flexing the wires would provoke it.



STeve



On Thu, Jul 29, 2021 at 10:49 AM Steve Panish <scpanish@panishnet.com> wrote:

Good idea Dale. I dont' know the pinout, so wasn't aware this would be possible.



On Thu, Jul 29, 2021 at 9:49 AM Dale Ghent <daleg@elemental.org> wrote:


Could be the dec cable has developed a connection fault in the form of a broken wire. Swap it with the RA cable and see if moving the dec axis continues to have problems.

On Jul 29, 2021, at 09:42, Steven Panish <scpanish@panishnet.com> wrote:

Help! My 1200 CP3 is intermittently not responding to DEC move commands, either manually from the V2 driver window or the handbox, or via PHD2. I've unplugged the DEC motor connections and put contact cleaner on the exposed pins, which did not help. Would appreciate help debugging. It happens a couple times per evening and resolves itself after a minute or two.

thanks,
Steve








Re: Debugging Dec failure to move w/1200 CP3

Steven Panish
 

OOPs meant when DEC fails I can nudge in RA just fine.  I just hope it isn't in the motor box.  I don't want to take everything down.

On Thu, Jul 29, 2021 at 11:13 AM Steven Panish via groups.io <scpanish=panishnet.com@groups.io> wrote:
George,
Not likely.  The problem is only on DEC.  RA is unaffected and when DEC is failing I can nudge in DEC just fine, and tracking is fine (in RA).  So I don't see how it could be the 12V power to the CP3.  I think it has to be either in the CP3 guts outward to the  DEC motor.  I'll do the cable swap and maybe ohm out the cable first.

Are there any known points of failure in that path?

Steve

On Thu, Jul 29, 2021 at 11:00 AM George <george@...> wrote:

Steve,

 

Remove the power cable from the CP3 control box and note that the center pin is a split pin.   Spread the two halves with a jeweler’s screwdriver or the tip of a knife blade.   See if you still encounter an issue.   If you do, then reverse the RA and Dec cables and see if the issue is with the RA instead of the Dec.   

 

Let me know directly at my AP email below.

 

Regards,

 

George

 

George Whitney

Astro-Physics, Inc.

Phone:  815-222-6538 (direct line)

Phone:  815-282-1513 (office)

Email:  george@...

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Steven Panish
Sent: Thursday, July 29, 2021 9:54 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Debugging Dec failure to move w/1200 CP3

 

Although now that I think about it, swapping will be tough test.  The problem comes and goes intermittently.  I may have to wait for it to really break.  Maybe flexing the wires would provoke it.

 

STeve

 

On Thu, Jul 29, 2021 at 10:49 AM Steve Panish <scpanish@...> wrote:

Good idea Dale.  I dont' know the pinout, so wasn't aware this would be possible.

 

On Thu, Jul 29, 2021 at 9:49 AM Dale Ghent <daleg@...> wrote:


Could be the dec cable has developed a connection fault in the form of a broken wire. Swap it with the RA cable and see if moving the dec axis continues to have problems.

> On Jul 29, 2021, at 09:42, Steven Panish <scpanish@...> wrote:
>
> Help!  My 1200 CP3 is intermittently not responding to DEC move commands, either manually from the V2 driver window or the handbox, or via PHD2.  I've unplugged the DEC motor connections and put contact cleaner on the exposed pins, which did not help. Would appreciate help debugging.  It happens a couple times per evening and resolves itself after a minute or two.
>
> thanks,
> Steve
>






Re: Debugging Dec failure to move w/1200 CP3

Steven Panish
 

Eric,
The CP3 is connected through a serial/usb converter, but the RA still responds to a nudge even when the DEC does not, so the port is still alive.   And the handbox shows the same issue.  I think the fault has to be later in the path than the comm between the PC or handbox and the CP3.  Although I don't know the architecture.  Good thought though.
Steve



On Thu, Jul 29, 2021 at 11:09 AM Eric Dreher <ericpdreher@...> wrote:
Some will sleep, removing power from the port when it's considered inactive.


Re: Debugging Dec failure to move w/1200 CP3

Steven Panish
 

George,
Not likely.  The problem is only on DEC.  RA is unaffected and when DEC is failing I can nudge in DEC just fine, and tracking is fine (in RA).  So I don't see how it could be the 12V power to the CP3.  I think it has to be either in the CP3 guts outward to the  DEC motor.  I'll do the cable swap and maybe ohm out the cable first.

Are there any known points of failure in that path?

Steve

On Thu, Jul 29, 2021 at 11:00 AM George <george@...> wrote:

Steve,

 

Remove the power cable from the CP3 control box and note that the center pin is a split pin.   Spread the two halves with a jeweler’s screwdriver or the tip of a knife blade.   See if you still encounter an issue.   If you do, then reverse the RA and Dec cables and see if the issue is with the RA instead of the Dec.   

 

Let me know directly at my AP email below.

 

Regards,

 

George

 

George Whitney

Astro-Physics, Inc.

Phone:  815-222-6538 (direct line)

Phone:  815-282-1513 (office)

Email:  george@...

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Steven Panish
Sent: Thursday, July 29, 2021 9:54 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Debugging Dec failure to move w/1200 CP3

 

Although now that I think about it, swapping will be tough test.  The problem comes and goes intermittently.  I may have to wait for it to really break.  Maybe flexing the wires would provoke it.

 

STeve

 

On Thu, Jul 29, 2021 at 10:49 AM Steve Panish <scpanish@...> wrote:

Good idea Dale.  I dont' know the pinout, so wasn't aware this would be possible.

 

On Thu, Jul 29, 2021 at 9:49 AM Dale Ghent <daleg@...> wrote:


Could be the dec cable has developed a connection fault in the form of a broken wire. Swap it with the RA cable and see if moving the dec axis continues to have problems.

> On Jul 29, 2021, at 09:42, Steven Panish <scpanish@...> wrote:
>
> Help!  My 1200 CP3 is intermittently not responding to DEC move commands, either manually from the V2 driver window or the handbox, or via PHD2.  I've unplugged the DEC motor connections and put contact cleaner on the exposed pins, which did not help. Would appreciate help debugging.  It happens a couple times per evening and resolves itself after a minute or two.
>
> thanks,
> Steve
>






Re: Debugging Dec failure to move w/1200 CP3

George
 

Steve,

 

Remove the power cable from the CP3 control box and note that the center pin is a split pin.   Spread the two halves with a jeweler’s screwdriver or the tip of a knife blade.   See if you still encounter an issue.   If you do, then reverse the RA and Dec cables and see if the issue is with the RA instead of the Dec.   

 

Let me know directly at my AP email below.

 

Regards,

 

George

 

George Whitney

Astro-Physics, Inc.

Phone:  815-222-6538 (direct line)

Phone:  815-282-1513 (office)

Email:  george@...

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Steven Panish
Sent: Thursday, July 29, 2021 9:54 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Debugging Dec failure to move w/1200 CP3

 

Although now that I think about it, swapping will be tough test.  The problem comes and goes intermittently.  I may have to wait for it to really break.  Maybe flexing the wires would provoke it.

 

STeve

 

On Thu, Jul 29, 2021 at 10:49 AM Steve Panish <scpanish@...> wrote:

Good idea Dale.  I dont' know the pinout, so wasn't aware this would be possible.

 

On Thu, Jul 29, 2021 at 9:49 AM Dale Ghent <daleg@...> wrote:


Could be the dec cable has developed a connection fault in the form of a broken wire. Swap it with the RA cable and see if moving the dec axis continues to have problems.

> On Jul 29, 2021, at 09:42, Steven Panish <scpanish@...> wrote:
>
> Help!  My 1200 CP3 is intermittently not responding to DEC move commands, either manually from the V2 driver window or the handbox, or via PHD2.  I've unplugged the DEC motor connections and put contact cleaner on the exposed pins, which did not help. Would appreciate help debugging.  It happens a couple times per evening and resolves itself after a minute or two.
>
> thanks,
> Steve
>






Re: Debugging Dec failure to move w/1200 CP3

Steven Panish
 

Although now that I think about it, swapping will be tough test.  The problem comes and goes intermittently.  I may have to wait for it to really break.  Maybe flexing the wires would provoke it.

STeve

On Thu, Jul 29, 2021 at 10:49 AM Steve Panish <scpanish@...> wrote:
Good idea Dale.  I dont' know the pinout, so wasn't aware this would be possible.

On Thu, Jul 29, 2021 at 9:49 AM Dale Ghent <daleg@...> wrote:

Could be the dec cable has developed a connection fault in the form of a broken wire. Swap it with the RA cable and see if moving the dec axis continues to have problems.

> On Jul 29, 2021, at 09:42, Steven Panish <scpanish@...> wrote:
>
> Help!  My 1200 CP3 is intermittently not responding to DEC move commands, either manually from the V2 driver window or the handbox, or via PHD2.  I've unplugged the DEC motor connections and put contact cleaner on the exposed pins, which did not help. Would appreciate help debugging.  It happens a couple times per evening and resolves itself after a minute or two.
>
> thanks,
> Steve
>







Re: Debugging Dec failure to move w/1200 CP3

Steven Panish
 

Eric,
Thanks, but I don't understand why USB power would have any bearing on the issue.  ???
Steve

On Thu, Jul 29, 2021 at 10:27 AM Eric Dreher <ericpdreher@...> wrote:
Via Device Manager, have you checked Power Management settings for your internet USB hub/ports?


Re: Debugging Dec failure to move w/1200 CP3

Steven Panish
 

Good idea Dale.  I dont' know the pinout, so wasn't aware this would be possible.

On Thu, Jul 29, 2021 at 9:49 AM Dale Ghent <daleg@...> wrote:

Could be the dec cable has developed a connection fault in the form of a broken wire. Swap it with the RA cable and see if moving the dec axis continues to have problems.

> On Jul 29, 2021, at 09:42, Steven Panish <scpanish@...> wrote:
>
> Help!  My 1200 CP3 is intermittently not responding to DEC move commands, either manually from the V2 driver window or the handbox, or via PHD2.  I've unplugged the DEC motor connections and put contact cleaner on the exposed pins, which did not help. Would appreciate help debugging.  It happens a couple times per evening and resolves itself after a minute or two.
>
> thanks,
> Steve
>







1100GTO AE PHD2 Settings #Guiding #Absolute_Encoders

Joe Erickson
 

 

I am loving my new Astro-Physics equipment (1100GTO AE, ATS 8x48 Tri-Pier, 130GT with Quad TCC & 13035FF). I received the 1100GTO AE in May but I am just now getting enough clear nights to learn how to use it.

 

I have PHD2 working better than my previous mounts but I see some 1100GTO users talking about better guiding numbers. I have not changed any of the default PHD2 settings yet.

 

My image trains are:

  • EdgeHD 14 (F11 – 3910mm FL) -> Litecrawler LR25 -> Optec Sagita OAG + QHY-5III 174M -> QHY 9x2 EFW -> QHY600M.
  • EdgeHD 14 (F8 – 2737mm FL) -> Celestron 0.7 Reducer -> Litecrawler LR25 -> Optec Sagita OAG + QHY-5III 174M -> QHY 9x2 EFW -> QHY600M.
  • AP 130 GT (F4.5 -> 585mm FL) -> Nitecrawler WR35 -> AP Quad TCC -> Optec Sagita OAG + QHY-5III 174M -> QHY 9x2 EFW -> QHY600M.
  • AP 130 GT (F6.7 -> 871mm FL) -> Nitecrawler WR35 -> AP 13035FF -> Optec Sagita OAG + QHY-5III 174M -> QHY 9x2 EFW -> QHY600M.

 

For software I use SGP, SharpCap, PHD2 and All Sky Plate Solver.

 

I have not used APCC because I have to set up in the backyard every time.

 

All of the above is new to me this year and a big upgrade from what I had before. The biggest surprise was how easy it is to polar align – no more fiddly small knobs!

 

Can anybody make recommendations regarding PHD2 settings and / or point me to a good source of information that would help me to make the best use of my 1100GTO AE?

 

Thank you.

Joe Erickson

 


Re: Mgbox placement?

Worsel
 

Joe

Valid points.  I should have stated that I control everything remotely; so the only time I am in the observatory is when I am not imaging, e.g. visual.

Bryan


Re: AP1100, Berlebach Planet, mounting CP4

ap@CaptivePhotons.com
 

Wow, I sure missed an obvious solution.

 

@Peter Nagy “Never leave RAPAS into the mount after finishing polar alignment. I guarantee you at least one of the cables will get caught.”

 

@Woody Schlom “I just remove the RAPAS after PA.  Cables want to hang up on it anyway.

 

@fernandorivera3 “There is absolutely no reason to keep the RAPAS permanently attached to the mount. It is only used for initial polar alignment & once done with the fine tuning/tweaking it is put away until the next session.

@M Hambrick “I agree with all of the comments about the RAPAS. Do not leave it attached.”

 

OK… I admit to a brain failure of some sort, it just never occurred to me that this was intended as an in-and-out device. I also read two lines in the manual badly, and they left me with the impression it was left in:

 

even if the polar scope is removed at the end of a session and replaced at the next session.” (note “end of session), and then I MIS-read:

 

Important Reminder: The RAPAS Adapter must always remain attached to the scope.”  As saying the RAPAS must remain attached, but it goes on to say “Only the RAPAS itself, is removed”.  Clearly it is referring to a change to other mount types and placement of a special adapter that should not be removed.  Forgot high school test taking 101 –read the whole question.

 

Enough excuses: It’s obvious in retrospect it can just come off.  Though I do worry about daily use and the relatively small threads on the holes, but I’ll cross that bridge if it becomes an issue.

 

One small suggestion – if Astro-Physics is reading: – I had read and in some cases printed these manuals ahead of time, and did not until now look at the instruction sheets in the box.  The one online is from 2017.  The one in the box is from 2019, and in big bold print at the top it says “USE IT AND REMOVE IT” that is not on the online copy.  Please consider updating the online manual with the new text for those who try to get a head start.  (Link is mid-page on “tech_support” page under Mount Accessories, Instructions”).

 

Anyway…. Back to:

 

@M Hambrick said: “Back to the topic of whether you should orient the tripod with the 3rd leg pointed south, I would caution you not to do this.”

 

Sorry, I thought I was clear, I tried, it will clearly be a tip over risk with the AP1100.  I agree completely.  What I was trying to convey is the REASON it is a tip over risk is that the mount extends further out (than the MyT) and that also is the reason that there is no need to reverse – the additional extension away from the center of gravity also provides plenty of leg clearance (in either orientation).  Net good thing.  I guess I would say a bad thing on the MyT that its design exacerbates leg crashes in the conventional CW-over-one-leg orientation.  No issue, was just a (convoluted) comment.

 

As to play in the mount holes, I will keep an eye out for movement there, but it seems reasonably snug so far but indeed the thru holes are quite a bit larger than the screws. Thanks for the photos and pointer.  That shift would occur regardless of leg placement.

 

Anyway… mostly wanted to provide a followup, and a head’s up to anyone mounting on Berlebach’s base – it’s a great, well made, heavy duty base – but the added wall thickness needs to be accommodated with some different hardware.

 

Linwood

 


Re: Debugging Dec failure to move w/1200 CP3

Jeff B
 

Good advice Dale.  👍


On Thu, Jul 29, 2021 at 9:49 AM Dale Ghent <daleg@...> wrote:

Could be the dec cable has developed a connection fault in the form of a broken wire. Swap it with the RA cable and see if moving the dec axis continues to have problems.

> On Jul 29, 2021, at 09:42, Steven Panish <scpanish@...> wrote:
>
> Help!  My 1200 CP3 is intermittently not responding to DEC move commands, either manually from the V2 driver window or the handbox, or via PHD2.  I've unplugged the DEC motor connections and put contact cleaner on the exposed pins, which did not help. Would appreciate help debugging.  It happens a couple times per evening and resolves itself after a minute or two.
>
> thanks,
> Steve
>







Re: Debugging Dec failure to move w/1200 CP3

Dale Ghent
 

Could be the dec cable has developed a connection fault in the form of a broken wire. Swap it with the RA cable and see if moving the dec axis continues to have problems.

On Jul 29, 2021, at 09:42, Steven Panish <scpanish@panishnet.com> wrote:

Help! My 1200 CP3 is intermittently not responding to DEC move commands, either manually from the V2 driver window or the handbox, or via PHD2. I've unplugged the DEC motor connections and put contact cleaner on the exposed pins, which did not help. Would appreciate help debugging. It happens a couple times per evening and resolves itself after a minute or two.

thanks,
Steve


Debugging Dec failure to move w/1200 CP3

Steven Panish
 

Help!  My 1200 CP3 is intermittently not responding to DEC move commands, either manually from the V2 driver window or the handbox, or via PHD2.  I've unplugged the DEC motor connections and put contact cleaner on the exposed pins, which did not help. Would appreciate help debugging.  It happens a couple times per evening and resolves itself after a minute or two.

thanks,
Steve


Re: AP1100, Berlebach Planet, mounting CP4

M Hambrick
 

Hi Linwood

I agree with all of the comments about the RAPAS. Do not leave it attached. You can do your polar alignment from Park 2 even with the scope attached, but after you have aligned the mount you should remove the RAPAS, otherwise you will be sending it back to A-P for repair or replacement.

Back to the topic of whether you should orient the tripod with the 3rd leg pointed south, I would caution you not to do this. Once you get the scope and counterweights attached, the center of gravity is going to be out beyond the edge of the mount base. It will be unstable.

I will share an experience I had with my 1100 GTO with a 180 EDT scope attached. The mounting holes in my old 8-inch A-P pier are slightly oversized, and I noticed one evening that after the scope and counterweights were installed that the mount base had shifted in the pier. The problem was that once the scope and counterweights were attached, the center of gravity had shifted out beyond the north side of the mount base and was trying to tip the mount and scope out of the pier. The excess clearance in the screw holes had allowed everything to shift even with the screws fully tightened. Take a look at the pictures below. In the picture on the left you can see that the base of the mount was tilted by about 1/16".

I was able to solve this problem by switching to high performance lock washers, but the point is that if you do not have the 3rd tripod leg facing north, your whole rig is liable to tip over.

Mike

 


Re: AP1100, Berlebach Planet, mounting CP4

fernandorivera3
 

There is absolutely no reason to keep the RAPAS permanently attached to the mount. It is only used for initial polar alignment & once done with the fine tuning/tweaking it is put away until the next session. 

Fernando

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