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Originally Posted by JohnG
Hi Roger
Couple of things, what Level Gemini do you have. Prior to Level 3 Version 1.13 there were problems with PAC, it was southern hemishere specific and would send your correction in the wrong direction. This was supposed to have been fixed in Level 3, Version 1.13.
I am asuming you have done this as you are experienced in using a Gemini. Have you checked your cables, no obvious faults. How is the 2032 battery, if it has been in the unit for more than 12 months it should be changed, a lot of problems can be traced back to this. Do you have the Gemini in Photo or All Speeds Mode when using the autoguider. How is your power supply, is the Gemini getting enough power.
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I'm happy to start at the basics, believe me. I'm sure it is something really basic that I should have worked out by now.
Gemini Level: L4 (installed a couple of months ago .... which makes me wonder, as the last 2 trips have been particularly bad... hmm, I haven't checked what bugs there are in it's version)
Power: About 16.5v. I have one of these multi-voltage things made for plugging into a car cigaret lighter sockent which has settings for 12v, 15v, 17v, 19v. I have it set to 15v and with no load it registeres at 16.5v, haven't checked it when there's load on it. Battery is 40Ah so lots of juice available in general.
2032 - I will replace this, good idea. It's been something like 9 months.
When tracking I have the gemini in Visual Mode. I'm tracking using GuideDog and a webcam, interfacing to the scope through the standard RS232 connection not the autoguider port, so as I understand it (and have seen from experimentation) the mode doesn't matter for this... Yet to really get the hang of this setup (guidedog with webcam to gemini) though, still new at this.
I haven't checked voltages on pins of cables, but it will GoTo accuarately, so assume the cables are OK. I sure knew I'd plugged the RA and DEC in around the wrong way when I did that one time recnetly
, that I could diagnose!
Thanks,
Roger.