Hey all, after months of it sitting idle, I’m back working on the CNC. I seem to have all the frame/gantry squareness issues sorted out now, and I’ve successfully cut some test pieces from plywood. Something is still not right, as my routed parts are not coming out the correct sizes. Take this piece for instance (see photo) - the square is supposed to be 5" on each side, with a 3.5" circle cut out of it. Instead, it’s coming out at around 4.975" and the circle varies from 3.5-3.52". The corners on the square seem to be 90degrees and corner to corner distance is good, so it doesn’t seem like it’s out of square. I don’t even know where to check, what would this be a symptom of?
This is with an 1/8 endmill, 1mm cutting depth, 15mm/s travel speed. The routed edges are all clean and straight.
I’m going to check perpendicularity of the DW660, but I wouldn’t think that would cause these symptoms. What else should I be checking?