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Cnc cutting under size

Hi all,

Got an issue with my heavy mill. Its machining undersize. For example, cad and fusion 360 show an opening of 17.75mm in 17mm thick birch plywood. When checking with verniers it measures 17mm to 17.3mm.

Any ideas of whats happening?

Thanks,

Josh

Hi Josh,
Have you calibrated your X,Y and Z steps to confirm the correct movement?

just a thought.

Cheers

Gordon