I just uploaded another V4 release. This one has a couple of feature updates, including arc fitting for pencil paths, but the big thing is the increase in accuracy. There are a number of things that I tweaked internally to achieve this. I have been wanting to do this for a while and the arc fitting turns out to be a good reason. In general, if you used .0001” before, you can increase this by a factor of five in this release or .0005”. My goal is that most users will never have to go below .001” unless they are doing very detailed parts on a very good machine.
I also did some work to make sure that the memory consumption will go down as well. You may have to take my word for it because it’s difficult to test but the “Offsetting Surface” phase can use up to 25% less memory depending on the model.
There should be another update to smooth out the arc fitting but I think I am happy with the toolpath quality for now.