Hi Brendan, I have done a cold start and it is in sidereal rate. As all this is now getting way over my head, can I post my unit with motors, leads and hand controller to you?
Lesters Gemini all fixed sent back to Lester this morning. I absolutely love his Maxon motors.
My std servo motors go thru harmonic shudders & vibrations when ramping up & down high speed slew changes. His are perfect!.......mmmm maxon...where's the "drool" emoticon when you need it!
Must say I am very pleased with the indepth communication from Brendan, informing me of what he was doing etc. Eventhough some of it did go over my head as I am not overly versed in such electronics. It did give me peace of mind that my unit was in good hands. I was extremely pleased to not have to send my Gemini unit back to USA. Thanks a heap Brendan, you are doing a great service for the astro community in Australia. All the best.
I hooked up the motors and Gemini to the Titan mount this morning, and delighted to say everything works as it is supposed to again. Thanks to Brendan. I cannot recommend this chap highly enough, a great asset to the astronomy community. All the best.
Many Thanks for your kinds words Lester and thanks for letting me have the pleasure of tending to your baby!
I must say I do like working on Gemini 1 units, they are a very cleaver design made top be repaired to component level. You don't see that often in designs these days.
Thanks Allan...I now pretty much have almost a full compliment spares parts for the G1: IC's; transistors; diodes; resistors and capacitors. I went thru and identified them all and stocked up, appart from EPROMs. I'd hate to be given one to repair and have to wait for parts to arrive.
Those with Gemini 1's ...please be careful with your DIN motor leads and how you put them in. Many a one is damaged by this when done incorrectly.
Rene did a nice job designing the Gemini 1, it was made to be fixed. I suspect the G2 is as well, but this time with better ground loop protection and I do know it has much better motor encoder protection!
So those with G2's...major problems of the G1 should never occur.
