On 16 Feb 2013, at 14:58, ed <[email protected]> wrote:

> Do you have backlash the full length or is the screw worn in the middle? 
> Most can be reballed to reduce the slop but you must be careful that the 
> OD of the ball does not bear, you want contact on the quadrants. How 
> much  backlash do you have now?

Turning the pulley by hand between positions with the table clamped shows 
0.08mm delta on the DRO. 
This is with brand-new parts, but no preload. RSW pattern nut. 


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