Hello
Jpow:
They
also sell plastic washers to put behind the hand wheel. Allows
you to reduce the clearance with less friction.
Ball
thrust bearings might be nice if you can find any. ( I might
have some from old phonographs, etc. )
Carl.
On 4/5/2023 3:11 AM, jpow wrote:
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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 :)
Carl