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(Below) The RA worm gear assembly.
This is what we pay the big bucks for and it shows in the very high quality of craftsmanship. Larry Myers diamond laps the worm gear and worm as a set in order to attain the 3-5 arc/sec uncorrected periodic error we all love to have.
With a good PEC training PE gets down to around +0.7", -0.6" |
LINKS To Additional MI-250 Information
The Mountain Instruments MI-250 above is my new pride and joy. Having learned to image on my old LX200 mount, this blows it's socks off!
Mount Modifications - MI-250 Modifications
Performance Data - MI-250 PEC
Gear Lashing - Adjusting Worm
Gemini Control Box Internals - MI-250 Gemini Control Box
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