Geof Wingham has documented a very
comprehensive program to improve the tracking of his 12" GPS. His
charts & comments documents the periodic error before and after the installation of
Buck's Gears. Geof's comments are highlighted in red.
Red Line original PE Error of LX200GPS 12"
when first placed on a wedge - once I had cleaned the crap and aluminum
filings off the worm it started to show 3 distinct cycles as it should.
I tried PEMPro to fix LX200 but it was a
waste of time - replaced all the gears with Bucks gears and tightened up
and adjusted what I could - it gave a lot smoother PE though it was still
Once Bucks gears were in PEMPro had a
chance and I was able to reduce PE to around 16 arc sec peak to peak -
WOW - Says a lot for the quality of Meade Telescopes. Especially the
started out with what was obviously a very bad drive - one unusable for
imaging even with guiding. This isn't uncommon. Only after
Buck's Gears were installed (and all the mechanical tune-ups included with a
Buck's Gears installation were made) was Geof able to make meaningful PEC
corrections. PEMPro gives nice informative graphics but I've found
Meade's PEC training to be just as effective. It's necessary to run
through several PEC training cycles to optimize drive performance and I don't
know if Geof did that. His periodic error is still a bit on the high
side, but with the very gentle slopes exhibited over the scope's 24-minute
period quality imaging is now possible.