Re: Ballscrew Slop Question

--- In CAD_CAM_EDM_DRO@y..., jh1221@a... wrote:

> Hello All, I just installed ballscrews on my Bridgeport mill, in
> preparation for a CNC conversion. They were purchased from Hi-Win
> Industries. After installation, I noticed that there is about .002-
> .003 slop in either direction on the X axis. (the Y seems OK) I

have

> been told that my bearings that are in the left side end cap might

be

> at fault. Could this be true? Since the original Bridgeport didn't
> need to have zero backlash, are they even thrust bearings at all?

If

> I need them, does anyone know of a cheap source?, the ones I

checked

> for the bridgeport(20mm id x 47mm od )are $270.00 for two!!! Or

does

> anyone know of a different solution? Thanks in advance; John

Check out the alignment of the nut. Probably got some drag caused by
the nut being off axes, twisted or misaligned. I know about that
because it's happened to me. Do you notice that axis requires more
torque than the y axis maybe only in spots?

Jim