Hi!
Lately, I'm experiencing bad guiding in DEC on mu G11. It's OK in RA and at times also in DEC, but unpredictable (so far). Good means a RMA of about 0.7 arc secs. Bad means RMS over 1.5. I use PHD2, and when measuring backlash there, I get values ranging from 16.6 to over 70. So there is a lot of questions here - how can it vary so much, and where does it stem from?
I've got the blocks into which the worm gear goes pressed together, to there is no identifiable slack there that, no wiggle back and forth. I've adjusted the worm gear in relation to the gear wheel, so it is close as I dare have it. What else can cause these variations and backlash?
The DEC gearbox sounds a lot - far louder than the RA. Could that be a source of backlash and instability?
All suggestions very welcome.
Magnus
