http://www.yumabassman.com/pictures/...20Axis%20b.JPG

Well, there it is. It's a combination of design to fit and machine to fit
techniques, but it screams up and down at 40 IPM. (Fastest I can run
without changing the kernel speed.) I expected to be able to stall it very
easily with the stepper running that fast, but I was unable to stall it by
bracing my hand against the table and bushing upward with the axis rapiding
downwards. (I think the G450 must switch from micro steps to full steps
over as certain step rate. I'll have to ask Marcus about that.) Now I
probably need to map the screw. Repeatability is very good, but accuracy is
pretty bad at different distances along the screw. I never had to map a
screw before. Funny that the first ball screw I install has the worst
accuracy of any screw I've used. LOL.