On 06/04/2017 08:22 PM, tom-...@bgp.nu wrote:
  I have to increase the depth a couple thou and re-cut the thread to cut it 
deep enough.
Due to machine spring as well as workpiece deflection, a second pass without even changing the X depth will take off some material. So, if you turn it down, measure, and then feed in a few thousandths in Z and cut again and get the desired depth, that will get you a too shallow cut if you try to cut at the same Z depth on the next part.

Jon

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