[Starkler (Geoff)]

After having bought Mortons ED115S (very nice scope it is too), I have purchased and fitted a set of drive motors for the eq5 mount I had tucked away.

I'm now plagued with backlash with this drive. The dec is much worse than the ra. With 8x speed selected, there is a good 6 seconds worth of backlash if I change directions in dec.

After much mucking around this afternoon it became apparent that upon applying torque to the worm gear, it skews off "sideways" for a bit before the slack is taken up and the mount starts moving. what this means is that the worm gear shaft can slop perpendicular to its axis under tension.

I ran out of daylight when i discovered this. There is no end to end slop apparent. Does anyone know the fix?