I would like to try using the Belleville washers, suggested by Michael, on my G11's Alt / Az PA adjusment knobs, I am in the UK and have located a source [Belleville Springs in Redditch uk].
Can someone please confirm what internal diameter and thickness do I need for these washers? Many thanks
Brian - I use Sharp Cap for PA on my ppermanent pier mounted G11. I had problems when tightening down the ajustment bolts after calibrating PA in that an excellent result would be made 'poor'.
The way I reduced the change in PA result, caused by tightening down these adjustment bolts, was to adjust PA using SC then measure the change in value between loose and tightned bolts which seemed a near consistant value of shift.
I then re-did the PA calibration deliberately overshooting by the measured 'shift' caused by the tigtening of the bolts, this seemed to help.
I am hoping the Belleville Washers will prove a better solution.
Terry [uk]
