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I swear by K3's Drift Explorer and used it to refine polar alignment on
my homemade GEM.
The best money I ever spent in this hobby was to register ver3.
Once set, my alignment never changes, unless bumped by the kids
playing in the dome or me etc.
But there is so much more you can do with it.
You can export the drift file to Excel and analyse and chart the
periodic error of your system.
The PE over a long enough time will show a series of sine waves.
The largest sine wave (each wave has smaller ones superimposed
on it), is the machining error of your final gear/worm/whatever.
What you do from there is limited only by your imagination.
I have a Bartels stepper drive on my scope.
The Bartels stepper drive can learn the PE or have a PEC file
installed so that once an incremented start point is known, you
call up the PEC file and it adjusts the drive to counteract the PE.
Brilliant!.
regards,
Steve B.
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