I am interested in building a small CNC surface grinder for hobby use.

I was wondering if anyone has any experience or thoughts on the following:

1. Anyone built their own CNC or manual surface grinder?
2. What suggestions for materials and control system others might have.
3. Should the table have magnetic holding capability?

The hobby size and control system I had in mind is as follows:

1. Table surface: 12" x 12"
2. Z axis servo or micro-system with precision ballscrew
3. X,Y manual axis with acme screws
4. magnetic table part clamping
5. Vac removal of grinding dust
6. Optional spraymist system
7. DRO for Z axis
8. Parts Cost targeted under $575
9. 30,000 rpm or greater grinding wheel.

Back about 6 years or so ago...there was an article in Home Shop Machinist about building a small surface grinder. You might check ebay and see what's available.

Paul

Hoss has equipped his X2 with a grinding head. Search for the Hoss thread. Maybe someone can post a link. The travels you mention are bigger than an X2 or even an X3.

Truthfully, the mag chuck and grinding head will likely eat your budget. Probably close to realistic though if you already have a mill with the precise Z axis cnc'ed.
I won't say it can't be done, but I just don't see how unless a very good deal falls in your lap.
Ebay is a pretty good source for information sometimes. Just check out some of the types of things that might be suited to your project and watch as those particular auctions progress. Then you might get an idea of the type of budget you might need to tackle this project.

YouTube - Hossmachine X2 Surface Grinder Attachment Test