As there are a good number of people on here that have had a bit of experience in stripping and redoing EQ6's, I figured this would be the best place to come for a little bit of advice.
Over the new year I decided that I should strip my OLD EQ6 down and give it a regrease, it hadn't been done in a few years and I was beginning to get a lot of large spikes in RA. So I have since got RA and DEC running down as low as 0.4" RMS, sometimes managing to go nearly a minute without having to make a guiding hit, especially in DEC which sometimes gets as low as 0.25" RMS. The problem that I am having is with what I can only imagine is DEC backlash.
Over time pulses do need to be sent to DEC, if they had previously been going in the other direction it can take ~50 pulses to recover before it'll make a DEC movement. After this it may not need another serious move for a few minutes but it'll usually end up being in the opposite direction where it'll again have to clear the backlash before making an actual move.
I have got both axis so there is no wobble at all and there is no binding. I spent a bit of time playing with the DEC this yesterday afternoon, as when I last had it out a few nights ago PHD had to do something like 100 backlash compensation moves. Tonight it was down to 50 but buggered if I know how to remove them :/
Could it be that the belt isn't quite as taught as it needs to be?
Do I need to work on the worm gears (the two hex bolts)?
Maybe the washer thing that I need the needle nose for? (struggling to remember what that washer thing is called, under the black cap)
Before I stripped down the mount I would usually have about 2-4 backlash compensation moves in both axis so I know it is capable of doing much better than what it currently is.
Thanks for any help and advice
