Geared timing belt and motor assembly (CNC)
thingiverse
A motor assembly for a NEMA23 to drive itself along a static 10mm GT2 belt. Geared 1:3 and using very little extra components. Requires: * a GT2-200 timing belt loop * a 60:20 teeth GT2 dual gear (6mm hole) * a pair of 626 bearings for that * a 6mm axle for all of above (43 mm) * a pair of 608 bearings to reverse the main belt around the driving pulley * a 8mm axle for that (43mm) * 4x M5 20mm screws to assemble the 3 parts * NEMA23 stepper motor * 4x bolts, nuts and washers to attach it. Printed in three separate parts, rotating them removes the need for any supports. Inserting the bearings most likely requires significant force. I used a small arbor press. Remember to not apply force on the center of the bearing but the outer ring only.
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