Warco Major CNC build log

[Robin Hewitt]

BTW Don't get too carried away - the head on these things can be flexed a few thou" with not too much trouble.

How anal is too anal? :naughty:

It is now 0.005 degrees out east/west and 0.002 degrees out north/south. Trying to resist going for better but whaddya do.

Started on attempt #2 at a faster spindle because the bearings are unhappy if I try to run the main spindle up to credible small tool speeds.

The fast spindle is an ER11 chuck fitted to the honking plate and driven using a 1:3 timing belt off the main spindle.

Same axial bearings and Belleville washers that have served me well so far, but less than the 1/4 ton preload this time.

I've been looking at those splendid tool location doo-dads based on an electrical contact between tool and workpiece. As featured on this very site

To that end I have added Tufnol insulators to the shaft housing. No electrical contact between tool and machine body until it hits the workpiece.