Quote Originally Posted by albertq View Post
Good luck with your grinding project. As I mostly make one-off parts, I didn't want to CNC my machine, but rather manually operate it with the use of DRO.
Anyway I'm not that smart so couldn't do it if I wanted to.
I only make one-stuff also but as the movements are simple on a surface grinder a CNC drive for the table is the easiest for me. Just back and forth a set distance at a set speed and and set step overs each stroke. The down feed on the wheel will be manual.

I am currently undecided on the longitudinal feed method. I did get a 20 mm pitch ball screw to drive it and I mocked up a wooden test table to see if a reasonable size stepper motor could drive it with enough acceleration. That worked perfectly but I am still debating whether to use a belt like yours or a wire in place of a belt. I have some experience with wire drives so it would not be a big learning experience.

CNC was the obvious choice for the cam grinding machine, that will save a lot of mechanical construction. With ball screws the accuracy should be good which is essential. Only the infeed axis will be CNC though, moving between adjacent cam lobes will be manual.