Hey all,
I'm having this really irritating problem with backlash coming from the Unimat PC cross-slide handwheel.
My understanding is that backlash (for the Unimat) can come from two sources
A) Play in the slide lead nut / screw itself; OR
B) Having too much of a gap between the threaded handlewheel and the cross slide itself.
?
My main issue is with B)
?
Following the Unimat instructions, I screw in the threaded handlewheel all the way, and back it out JUST a bit, before tightening up the locking nut (on the outside).
For the life of me, I can never get it "just right". If I tighten enough so everything JUST rotates smoothly, the backlash is too much (0.07mm). If I tighten anymore, the backlash is a bit better, but the handwheel starts to bind and it is difficult to turn freely.
(The binding is strange in the sense that "tightness" occurs at certains angles of rotation only, rather than a constant heavy friction).
Could this be some issue with the bushings or something? I tried putting in small thrust bearing between the handlewheel and where it is mounted, but it didn't help much.
?
Appreciate any advice thanks :)
