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AP1200GTO motor stall problem
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As you have seen from my other posts Ive been getting to know a 2007 model AP12000GTO with the CP3 v2 chip.
Got it cleaned and re-greased with the AP kit put power to it from a new 5 amp pyramid AC power source.... slews fine in RA nice and quiet. Nothing in DEC. LED turns from red to amber when pushing N or S. Sitting on my kitchen table still so no loads on it. Thinking maybe something it too tight I removed the motor and set it next to the mount and tried again. Nothing, not even a sound. Maybe the gears are too tight. Loosened the shoulder bolts still nothing. Red to amber on the LED. The gears spin free with the worm by finger. Not good. Tried another power source being my Costco jump box, nothing in DEC again. Shoot. Any ideas here? I do have a multi meter handy but would need some help with it. |
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Bill Long
Can you get a video of what you mean by "The gears spin free with the worm
by finger"?
From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Abraham <ashadbeh@...>
Sent: Sunday, January 1, 2023 9:52 PM To: main@ap-gto.groups.io <main@ap-gto.groups.io> Subject: [ap-gto] AP1200GTO motor stall problem As you have seen from my other posts Ive been getting to know a 2007 model AP12000GTO with the CP3 v2 chip.
Got it cleaned and re-greased with the AP kit put power to it from a new 5 amp pyramid AC power source.... slews fine in RA nice and quiet. Nothing in DEC. LED turns from red to amber when pushing N or S. Sitting on my kitchen table still so no loads on it. Thinking maybe something it too tight I removed the motor and set it next to the mount and tried again. Nothing, not even a sound. Maybe the gears are too tight. Loosened the shoulder bolts still nothing. Red to amber on the LED. The gears spin free with the worm by finger. Not good. Tried another power source being my Costco jump box, nothing in DEC again. Shoot. Any ideas here? I do have a multi meter handy but would need some help with it. |
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Bill Long
Also if you swap the RA and DEC cables, does the problem move from one axis to the other?
From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Bill Long <bill@...>
Sent: Sunday, January 1, 2023 9:55 PM To: main@ap-gto.groups.io <main@ap-gto.groups.io> Subject: Re: [ap-gto] AP1200GTO motor stall problem Can you get a video of what you mean by "The gears spin free with the worm by
finger"?
From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Abraham <ashadbeh@...>
Sent: Sunday, January 1, 2023 9:52 PM To: main@ap-gto.groups.io <main@ap-gto.groups.io> Subject: [ap-gto] AP1200GTO motor stall problem As you have seen from my other posts Ive been getting to know a 2007 model AP12000GTO with the CP3 v2 chip.
Got it cleaned and re-greased with the AP kit put power to it from a new 5 amp pyramid AC power source.... slews fine in RA nice and quiet. Nothing in DEC. LED turns from red to amber when pushing N or S. Sitting on my kitchen table still so no loads on it. Thinking maybe something it too tight I removed the motor and set it next to the mount and tried again. Nothing, not even a sound. Maybe the gears are too tight. Loosened the shoulder bolts still nothing. Red to amber on the LED. The gears spin free with the worm by finger. Not good. Tried another power source being my Costco jump box, nothing in DEC again. Shoot. Any ideas here? I do have a multi meter handy but would need some help with it. |
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Thanks Bill,
The sound you hear there is the new grease on the gears as I turn them. They dont spin free per say, just seems normal to me without binding. Hopefully I didnt fry something. If the attachement does not work try this link! https://photos.app.goo.gl/4VfJjRWyZ2n1mGA99 |
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Bill Long
Looks normal to me.
I would suspect a power related problem. Do the cable swap test and see what happens.
From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Abraham <ashadbeh@...>
Sent: Sunday, January 1, 2023 10:06 PM To: main@ap-gto.groups.io <main@ap-gto.groups.io> Subject: Re: [ap-gto] AP1200GTO motor stall problem Thanks Bill,
The sound you hear there is the new grease on the gears as I turn them. They dont spin free per say, just seems normal to me without binding. Hopefully I didnt fry something. |
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Yes the problem follows the cable. When I switched them the RA now does not work.
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Bill Long
Time to order a new motor cable. 🙂
From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Abraham <ashadbeh@...>
Sent: Sunday, January 1, 2023 10:11 PM To: main@ap-gto.groups.io <main@ap-gto.groups.io> Subject: Re: [ap-gto] AP1200GTO motor stall problem Yes the problem follows the cable. When I switched them the RA now does not work.
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Bill Long
This would be the cable, if your CP box is mounted on the RA housing. I am guessing it is.
From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Bill Long <bill@...>
Sent: Sunday, January 1, 2023 10:11 PM To: main@ap-gto.groups.io <main@ap-gto.groups.io> Subject: Re: [ap-gto] AP1200GTO motor stall problem
Time to order a new motor cable. 🙂
From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Abraham <ashadbeh@...>
Sent: Sunday, January 1, 2023 10:11 PM To: main@ap-gto.groups.io <main@ap-gto.groups.io> Subject: Re: [ap-gto] AP1200GTO motor stall problem Yes the problem follows the cable. When I switched them the RA now does not work.
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Well its better than a dead motor! Thanks for helping me troubleshoot this. Pretty awesome to at least have it figured out! Its understandable. Even a AP1200 is not indestructible.
Thank you! Abraham |
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Bill Long
No problem. I would say 15 years of use on the original cable is pretty good.
From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Abraham <ashadbeh@...>
Sent: Sunday, January 1, 2023 10:18 PM To: main@ap-gto.groups.io <main@ap-gto.groups.io> Subject: Re: [ap-gto] AP1200GTO motor stall problem Well its better than a dead motor! Thanks for helping me troubleshoot this. Pretty awesome to at least have it figured out! Its understandable. Even a AP1200 is not indestructible.
Thank you! Abraham |
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I do have a few mechanical engineers in my family who owe me some favors! Looks like it could be fixed......or send back to AP for repair? Or just bite the bullet and get new?
https://astro-physics.info/tech_support/mounts/servo/900-1200-gyc-diagram-2.pdf |
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Bill Long
Definitely try and fix it if you can. Something may have just popped loose on the cable connector
that is not working.
From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Abraham <ashadbeh@...>
Sent: Sunday, January 1, 2023 10:24 PM To: main@ap-gto.groups.io <main@ap-gto.groups.io> Subject: Re: [ap-gto] AP1200GTO motor stall problem I do have a few mechanical engineers in my family who owe me some favors! Looks like it could be fixed......or send back to AP for repair? Or just bite the bullet and get new?
https://astro-physics.info/tech_support/mounts/servo/900-1200-gyc-diagram-2.pdf |
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Roland Christen
Plug the RA part of the cable into the Dec motor. Then press E-W buttons. If it works, then you have a break in the Dec portion of the Y cable. Check the inside of the connector to see if any wires came loose.
Roland
-----Original Message-----
From: Abraham <ashadbeh@...> To: main@ap-gto.groups.io Sent: Sun, Jan 1, 2023 11:52 pm Subject: [ap-gto] AP1200GTO motor stall problem As you have seen from my other posts Ive been getting to know a 2007 model AP12000GTO with the CP3 v2 chip.
Got it cleaned and re-greased with the AP kit put power to it from a new 5 amp pyramid AC power source.... slews fine in RA nice and quiet. Nothing in DEC. LED turns from red to amber when pushing N or S. Sitting on my kitchen table still so no loads on it. Thinking maybe something it too tight I removed the motor and set it next to the mount and tried again. Nothing, not even a sound. Maybe the gears are too tight. Loosened the shoulder bolts still nothing. Red to amber on the LED. The gears spin free with the worm by finger. Not good. Tried another power source being my Costco jump box, nothing in DEC again. Shoot. Any ideas here? I do have a multi meter handy but would need some help with it. -- Roland Christen Astro-Physics |
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Definitely check the connections to see if it can be repaired. I always kept a spare just in case.
-- Dean Jacobsen Astrobin Image Gallery - https://www.astrobin.com/users/deanjacobsen/ |
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