Quote Originally Posted by John S View Post
You don't say how long the fence is but you will need either two support rails for it and one feedscrew, ballscrew actually if you want to keep to 0.1mm accuracy
Surely a trapezoidal screw will have sufficient accuracy. You can get them in similar accuracy grades as ballscrews. C7 grade would be fine. Since speed probably isn't an issue the efficiency of the ballscrew is not an advantage and with this set-up it is very easy to compensate for the greater backlash. Just seems a bit over the top to use a ballscrew to me...