Hey there, not sure if this is a mach question, so may not belong here, but in an effort to knock out some terribly wacky backlash (X-axis) I replaced gibs, lead screws, even one motor. Figured I'd do it on the Y and Z while I was at it, on my Sherline 2000.
It looked like I got out as much backlash as is possible on that machine but if you'll view the attached photo, you'll see where the arrow annotation is, there's this scalloped look to the cut. I tested with Kiran's wizard for cutting a circle.
Anyway, I'm wondering what's causing this. Is it motor tuning? Too tight a gib? Smoothstepper setting?
Any ideas would be appreciated. -Keith