Hi,

MDF is usually quite nice to machine and forgives a lot in terms of feedrate and rpm.
Is your tool sharp enough (cheap ones are often dull by design - good V-bits can be quite pricey)?

You may try to cut in 2 passes to improve results - just start the program twice:
  • The first time zero your Z-axis 0.1mm higher than required.
  • Second time zero your Z-axis correctly, use max rpm and moderate feedrates.


Christian