Another question would be how much wear your z axis might have in the
travel range you are working in.
After running many long hours in a couple of inch range, like in making
patterns, the z axis "wear" could possibly be eccentric.
I don't have a Haas, but with a Cincy vertical mill there is a z axis
counter balance cylinder that could be screwing up.
There could be a ton of reasons for seeing less that a thou shift.
3D Laser Scanning, Digital Object Reproduction
Too bad you don't have the Renishaw probe setup, you can integrate the
macros right into the program and tool-offset all the tools in a few
seconds at the beginning of every program.
My suggestion would be to run the machine full-time or at least start
it running 4-6 hours before you need to run parts. Adjusting your
shift schedule sounds like a good idea in this case.
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