Doh!
Gerry, my apologies, I've been wasting your time.
I took another look at the drawing I'd been using (just a quick and dirty 'slap some shapes down to see what happens').
It's rather hard to cut a 20x10mm rectangle with two <4mm diameter holes when you've setup the CAM program to use a 1/4" (6.35mm) tool!
I put together something on a more sensible scale; SheetCAM then produces a set of paths and rapids that look fine, and the resulting g-code runs as I'd expect on both CNCSimulator and Mach.
This looks exactly like what I need, but I'll see if I can get an eval licence for SheetCAM (as the 150 line limit is a bit restrictive). That way I can have a play before I get a machine, but it certainly looks promising.
Many thanks for your help! |