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Hi,
I am posting this in hopes someone will know what I am talking about. Are there any Gemini users in the house?

I just upgraded my G11 to Gemini and took it out to field test at a star party. Someone is saying, "Field test at a star party, in the dark?" Yes I did, or tried to do.
I started the uploading of GPS and mount type and arrived at "Telescope Alignment". When I pick a bright star and select, the hand display reads "Motor Stalled: D ". That is as far as I could get and my Gemini field test was a bust.

I brought the mount home, and the next day I removed the motors and connected the DEC/RA wires, powered up with a Pyramid power supply, recommended my Losmandy, and received the same fault code.

I interchanged DEC/RA wires, then switched motors, then wires and motors. I received the same fault each time.

I powered up with no wires attached and I get "Motor Stalled: RA Lags".

Is there anyone who can help me with this?

Thanks,
Mark

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Hi,

After reading your message now I do not know which motor is where but it does not matter.

The message " Motor Stalled: D " is a clear sign of binding gears.

The message " Motor Stalled; RA lags " means that you are approaching a gear binding in the RA axis. Take your worm a little bit away from the gear and the message should not appear again, but before you tinker with the worm/gear adjustment make a test all over the RA axis movement. Go to the Limit and see if you get the message when it is tracking in sidereal rate. Then move maybe 10° and let it track again and so do it every 10°. Also check the temperature of your motor.

If you only get the message when slewing then you have a power problem. The gemini draws about 3amp when slewing in both axis at the same time at speeds maybe over 900x.

Edited by rsbfoto (04/29/09 04:16 PM)

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Mark:

Contact Scott Losmandy immediately. He should be able to walk you through and diagnose this problem.

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