You're right Stan, I did not consider the distortion of the plate by the magnet. Even though it's around 1.2" thick (no longer parallel front / back) it was shimmed at the four corners so there's bound to have been some dip in the centre, just thinking about that I think it would probably now be convex rather than concave, as the magnet will have been pulling the middle away from the grinding wheel. Will be interesting to sit it on the surface plate next time it is off.
Eit: just looked back at the third photo in post 89 of this thread, the curve in the leading edge of the fresh grind does seem to suggest that the magnet was pulling some concavity into the plate. I noticed the grind wasn't advancing in a straight line across the part, that makes sense now.
Eit: just looked back at the third photo in post 89 of this thread, the curve in the leading edge of the fresh grind does seem to suggest that the magnet was pulling some concavity into the plate. I noticed the grind wasn't advancing in a straight line across the part, that makes sense now.
Lathe (n); a machine tool used in the production of milling machine components.
Milling Machine (n); a machine tool used in the production of lathe components.
Milling Machine (n); a machine tool used in the production of lathe components.