Reply To: Z Axis Plunging Too Deep (Solved, But I Have a Question)

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You have all the weight of your spindle helping the motor when it’s trying to go down, but when you want to go up the motor is having to overcome any inherent friction AND the weight of your tool is a detriment.

Also, if you’ve been using the machine long enough – about a month after I first started using mine I had a crash that was caused by the coupler wearing in such a way that when it turned one direction it caught the all thread and made the axis move, but going the other direction (up), the coupler was just rotating around on the shaft of the stepper but not making the all thread turn. Something about the way the threading on the all thread ate into the PLA coupler that caused it.