Arrived at the shop tonight and found both X and Y axis have 0.200” per revolution.
My Y axis lead screw is 5/8-5” x 10” length and has a deviation of roughly 0.020” of tooth thickness. The middle is worn the most.
In the photos, you can see the acme nut holder for table with an adjuster for slop. When the adjuster is fine tuned for middle of lead screw, it will bind at the ends.
If I wanted to replace the acme lead, I do not want to machine an entire shaft with the various features ranging from fine thread jam nut, thrust plate, and keyway.
I think simplest way is to:
1) cut old lead screw off
2) bore hole in remaining shaft
3) order a 5/8-5 lead screw
4) turned one end to fit in bored hole
5) fix in place (tig weld would be easiest)
Any foreseeable problems with the above process?