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#8947 |

Are you using the printed z-coupler? Put a piece of waste wood on the machine and start a cut. Watch the stepper/coupler/all thread carefully – any slippage whatsoever on the z axis will cause the problem you describe.

Ryan will suggest missing steps on the z axis, which is totally possible, but I’ve had slippage problems twice – once with the printed coupler, and once with a metal coupler that wasn’t installed tight enough – so that’s my first thing to check.

Good luck!