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I've recently realised there's motorised focusers and there's motorised focusers. The SW one is a DC motor. I have a Moonlite DC motor. While it'll work and all that, you may be disappointed if you want to try to use it with FocusMax and "autofocusing". I tried night after night to get it to calibrate and get reliable V curves. No dice. While I've read that guys have persisted and got it working, I decided that I was spending more time mucking around with calibrating it that I would if I were to focus manually with a Bahtinov mask.
If you want that next level of automation like using FocusMax, save yourself a world of frustration and go straight for a stepper motor type focuser. The difference with them is that they know where the focuser is positioned. ie they're "absolute" focusers. DC motors have no way of knowing what position they're in, ie "relative" focusers.
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