[ger21]

I don't use Mach2, but I periodically read the yahoo group. Do you have the latest version of Mach2? Art made a lot of changes in the last month or two in that area, so I don't really know the answer. I do know that the faster your acceleration is, the less rounding will occur. The rounding happens as 1 axis decelerates and the other accelerates. I'd ask on the yahoo group, you should get an answer there. But If you can't live with ANY rounding at all, I think you're going to have to use exact stop. One thing that might help. I'm assuming you're not using G41 or G42. If you're offsetting your toolpaths 1/2 the cutter diameter, try putting a radius the same as the cutter diameter at each corner. This will still leave sharp corners on your part, and it should get rid of the rounding.