For aligning a lathe, I use the process Blondihacks describes:
For sure deflection is a problem in the middle so I discarded the numbers that I felt would have been affected. But the number I stated included everything but the actual middle.
In retrospect if I was totally serious about this I would cut a 2 1/2" diameter 18" long piece of aluminum and use it to minimize deflection. Might actually do that at some point. I started the testing by only cutting a 1" wide cut at the ends. Once I was happy with that I did a full cut to get a better profile and eliminate tool position error from the DRO.
What do others do?
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1969 16" x 6' South Bend Lathe
Garage full of old Mopars........
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