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Genmitsu 3020 Z screw lock
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Cancel play in Z-axis
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NEMA17 motors have wave spring causing axial play.
3020, 3018 CNC contruction connects Z leadscrew directly to motor shaft.
This results Z-axis less capable than it could be.
Aditional nut restrain leadscrew and releaves stepper bearing load.
1. Loose shaft adapter and extend leadscrew.
2. Put nut and cancel play ( spanner attached with cnc can be used)
3. Do not overtigh nut. This could damage motor bearing!