Can not find surfacw

[Mugsowner]

Not sure how these machines know surface? This machine does its checks then carves to high. It is starting the carves about .06 to .08 to high from what I can see. Does this on every thing I load in to machine.

[henry1]

Not sure how these machines know surface? This machine does its checks then carves to high. It is starting the carves about .06 to .08 to high from what I can see. Does this on every thing I load in to machine.

Would like to help, but a picture would help,, also more info like type od machine you have,, and spindle type and does it do all the step when you put in the carving bit

[bergerud]

Try something simple like drill a 1/2" hole 1/4" deep in the center of a piece of scrap wood. Use jog to touch to touch where the hole will be drilled.

If it fails to accuracy do this, there must be something loose in the z truck system. Something allowing a backlash. All rollers tight? Z belt tight? Bearings in the z motor ok? Encoder tight on shaft?