Quote:
Originally Posted by Shiraz
On my old mk1, I bluetacked a drinking straw to the unused focuser knob. Then varied the step size to find what setting just took up the gear slack and started the end of the straw moving when the motor was reversed after a few steps in one direction. Used that as the backlash setting in SGpro with good results. From memory it was around 20-30 ticks.
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Thanks. About as accurate as my existing measure I would guess.
Quote:
Originally Posted by Shiraz
If you have the focus point drifting around, you could have trouble with slippage in the Megrez focuser itself. Never used one, but a quick look around the web is not comforting. FWIW, my similar low end Crayford focusers (modified GSO and SW) can reliably hold an imaging train of about 1kg, but not much more.
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Look on the web and you'll find anything you want
There's a zillion different iterations of megrez focusers so not really a reliable indication. I don't believe slippage is a problem, it feels rock solid and impossible to shift the tube. That said, it does have an issue, with flop not slippage. Getting it to hold the imaging train straight without any sag is an issue, but that doesn't seem to vary, it's fixed. Hmm. Worth investigating physical setup/influences some more
