Re: Retrofit Backlash

There preloaded ball screws. That's all I know. I have a freind
helping me with this and he sent the yoke out to the company that we
bought the ballscrews from and they modified my yoke to work.
It seems the backlash I'm getting is flex, because the yoke is seems
to be moving with very little backlash .0005 or less.

--- In CAD_CAM_EDM_DRO@y..., "Dan Mauch" <dmauch@s...> wrote:
> Out of curiousity did you buy the hiwin ball screws with the yoke
for a
> BP? If not how did you fasten the ball nuts to the yoke?
> Dan
> -----Original Message-----
> From: grease122696 [mailto:george@f...]
> Sent: Tuesday, March 12, 2002 10:47 AM
> To: CAD_CAM_EDM_DRO@y...
> Subject: [CAD_CAM_EDM_DRO] Retrofit Backlash
>
> I'm converting new Taiwan 9x49 knee mill to CNC using Ball screws
and
> steppers.
> There seems to be .001-.002 backlash in the X, .001-.003 in the Y
and
> .002 in the z. It seems the backlash is coming from flexing . I put
a
> indicator on the yoke up inside the casting to check the Y and it
> seems to .0005 backlash to there but when I indicate at the table
it's
> a different story. I have the same problem with the Z. I couldn't
get
> a indicator on the yoke to check the X.
>
> Anybody have this problem or have any suggestions.
>
> TIA
> Geo.
>
>
>
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