[CAD_CAM_EDM_DRO] X axis yaw on CNCd G8689

Sorry for the repost - didn't get any bites last week.
I thought I'd start a new topic for this (as opposed to continuing the tool
size > hole dia). I have a G8689 converted to CNC and it still has ACME
screws. In cutting the holes using the CNC, I get holes that aren't too
round. PArt of the problem is that I need to better characterize the
backlash in MACH, but I also noticed that I have some significant yaw issues
with the X axis - except at the end points of travel, where the ways tighten
up so much that the steppers miss steps. So, it looks like I need to rework
the ways on this mini mill - any suggestions???? I have a pretty good
Bridgeport that I could toss this little table on and try to straighten the
ways, or is this a dumb idea? thanks, C


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