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Theres nothing particularly complex about driving a derotator- at least of the Pixsis ( ? ) variety. You can download the software to run one from the website and look for yourself.
From memory you just enter into the software the hour angle ( RA to or from the meridian ) of the object you want to image , and the software drives the rotation motor at the correct variable rate as the exposure progresses. This little program runs in the background to whatever you are using to drive your 'scope.
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