GT81 autofocuser bracket
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Bracket to attach a nema17 motor for onstep autofocuser to an old (mk1 or 2?) style william optics GT81.
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- Printables
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- Electronics
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- Creative Commons — Attribution — Noncommercial
Bracket to attach a nema17 motor for onstep autofocuser to an old (mk1 or 2?) style william optics GT81. I found that direct drive was skipping steps so I added a 4:1 pulley reduction. Bottom mounting uses and open threaded hole at the edge of the focuser base and the focuser tension lock threaded hole. Slot allows access to the tension set screw even with mount installed.
Other components used:
5mm stainless rod cut to size
5mm bore 80 tooth pulley, 5mm bore 20 tooth pulley, 200mm GT2 belt
4mm (focuser shaft) to 5mm flexible coupling