Re: [CAD_CAM_EDM_DRO] How does one adjust Ballscrews on a Bridgeport

Ed Fanta wrote:

>Some of the cheaper setups use non precsion screws and space two ball
>nuts apart with Bellville washers to get the "preload". They act as you
>describe, springy to compress the washers then more solid to move the
>table. Not good if you are CNCing it or think you can climb mill with
>it. Ed.
>

These screws seem to be pretty good - there is a single very heavy nut
on each screw. I bought them new (off eBay) - had to open the original
crate. The test reports looked good, too - they're precision ground,
not rolled.

Thanks
- Steve