hey Charlie, thanks for getting back. Canvas to small = No. Maybe these pics will better illustrate it. First is no Z fill, 1x1 model on a 3x3 canvas. all material round the model is removed, perfect bevel, but wasteful.
Then with Z fill, we only get about 1/4 of the bevel. plenty of canvas. Now it does seem like the program thinks the bit won't fit, but there is no reason for it not to. Physically at least.
Even in this view from the operations tab, it's modelling the bevel, but it won't cut it. Is there a way to add a buffer... or something around the outside the model? I'm at a loss, thoughts?