Problem with DIY CNC

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Joined: 11/04/2012
Location: Australia
Posts: 915
Posted: 04:14am 21 Apr 2023      

I built a benchtop CNC machine and recently after upgrading the motor to an 800W air cooled unit (I wanted software speed control as well) I also upgraded the Z axis bearings to linear units. The problem is that I now have slippage of the Z axis. As far as I am aware the stepper units are locked electrically during other operations but gravity takes effect when I am lowering the tool.

Is there a mechanical or electrical fix to this problem?