Hey guys,
I am just finishing up an upgrade to my X3 (G0463) with the goal of extending my Y-axis travel and getting rid of grossly excessive backlash (0.018").
I replaced the Y-axis ball screw, nut, and ACBs (re-machined the bearing pockets), and added a spacer block to extend my older (pre-zero back lash) CNC Fusion Y-axis travel by ~7/8" (Crevice Reamer mod).
And now that I'm back up and running something strange is going on.
The Mill "lurches" when the Y-axis changes direction. I set up to test my backlash, and while jogging with 0.001" steps, when I change direction, the first jog lurches forward by > 0.01" and then all jogs after that are .001", unit I change direction again, where I get another "lurch"
I'm stumped
Mods... although I have an X3, I don't think the root cause is specific to the X3 platform, so I'd like to leave it here, where I'll get more responses.