Cupcake Inverted Z-Axis Idler Mount
thingiverse
Create a small idler pulley mount for your MakerBot Cupcake's Z-drive to be concealed entirely within the machine. Print one of these mounts and follow these instructions. Remove the power supply cover to place the Z-axis belt at the bottom, then remove top pulleys and Z-axis stepper. Shift threaded rods so that top bearings are at the top, reinstall, and drill four holes for inverting the Z stepper. Install idler mount by finding a spot for it without power supply interference. Countersink two holes for idler and tidy up wiring on bottom board.
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