Hi Alex
Hmm, the worrying thing is one night it works and the next night, it only partially works – so what has changed? Here is what I would check:
- Are the grub screws that clamp/lock the spur gears to the worm shaft tight, or is one loose? (that is, if they are visible like on the Vixen GP mounts).
- On your GoTo’s, have you noticed any excessive backlash which may manifest as poor pointing accuracy?
- Are all the necessary check boxes ticked for correcting in RA and DEC? I haven’t looked at PHD for a while so I’m not sure where they are and of their format?
- Are all cables plugged in fully?
- Has a continuity test revealed any intermittent connections?
- Are the clutches tightened firmly so that they do not slip?
That’s all I can think of at the moment.
Hope you get it fixed mate, I know how frustrating it can be….
Cheers
Dennis