X3 mill with rails, ATC, new motor

[Jonathan]

I cut out the back plate for column, will leave the tapping for a rainy day:



The spacing of the bolts is loosely based on the theory here - namely make the stress cones under the bolts intersect to get maximum stiffness. This diagram illustrates that:



Made a ballnut mount for Z:



Remembered the cutout for the ballnut mount in the Z-plate. Clamped directly to mill bed to ensure parallelism.


Here's a picture of the drawbar I made earlier for the ATC:

That may not be the final number of disc springs - but there will be quite a lot to ensure they're not operated outside the recommended region to get long life.