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but seeing as it runs of a DC battery, would it work if you switched the polarity of the wires on the battery
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Davewaldo, Hmm, that's where I went wrong first time round. I thought that it would be OK to reverse the polarity and drive it backwards. That action fried the innards, so I won't try that again. In fact, I have had a fail safe installed, so it can't happen again. Thanks for the suggestion, but no thanks.
Paul, whole unit was supplied by Zhitong, and I have written to them to ask what to do. Whilst they have acknowledged my email, they have as yet offered no advice.
The controller says it is a "QHY STEP MOTOR CONTROLLER VER 1.3" and the stepper motor is an "EM ST30/ 12VDC, EVER MOTOR, 500 ohms".
I have opened the controller box, and there is no switch inside, (that probably means it isn't a Losmandy in disguise
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I have attached a few shots of the equipment, in case it means anything to anyone, but I can't see that it's likely to help much.
Thanks for the suggestions though, keep 'em coming.