RE: [CAD_CAM_EDM_DRO] Ball screw adjustment?

Go to http://candgresearch.domainvalet.com/ and look at the pictures of
the X and Y ball screws. These are using 2 nuts together to form an
antibacklash setup.

Tim
[Denver, CO]

> -----Original Message-----
>
>
> Hello Group,
>
> Has anybody on this list tried to "make" a preloaded ball nut from
> two standard nuts spaced apart? Is this a practical idea for use on
> McMaster ballscrews with a lead error tolerance of 0.004"/ft.? I
> talked to Rockford Ball Screws and found the price of the 3/4"
> preloaded nut was ~6X the price for 2 McMaster regular ball nuts.
> When "lead error" is quoted, is the error a linear additive, or
> variable amount? Restated, is the 0.004"/ft error consistent on the
> next 12", or is it some other distance on the next 12"?
> I'm getting ready to order the 3 screws for the GEM 500 machine, so
> looking for feedback. The 3D model will be placed on the Files list
> soon, along with the 5 axis trunnion table.
>
> Thanks in advance,
> Allan
>
>
> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html
> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
>