Machine ramping when not called for

Hey Tom,

this kind of failure has been reported relatively frequently.

When this happens (like here, here or here) the cause is usually a cable/connector problem on Z stepper motor cable.

Check if all cable connectors for the Z stepper motor sit correctly on all connections between Onefinity CNC Controller and the Z stepper motor.

Then mill air (no workpiece or better no milling bit) to check if you can reproduce the error.

See also