first off, im following a caminstructor video, ive done everything the instructor has shown, but im getting an error. im trying to pocket face my part to mill down my stock while avoiding a 2" circle, i use pocket mill, and chain select, select my first chain for the outside of my stock and then go to select my second chain to avoid my 2" circle. but it gives me and error saying "not all boundaries are closed. select open pockets or closed chains" or ill get an error saying "the selected sub-chain does not touch the branch point" what is this exactly telling me to fix.

my shop runs Kitamura HX300, two HX400, and one HX500. they are all great machines. the HX500 is a very solid machine.

wow 5th and 6th graders, that's amazing! my high school shop had nothing this cool. I'm finishing up a mx7 training course and there is a high school teacher getting his training. I say start them early, kids are great with technology these days.

I used small ball endmills to engrave hardened parts at work, it was a complete headache! seemed like if I had a .002 tolerance for my depth anything above didn't fully engrave and anything deeper the endmill would break. I switched to a hand made six sided engraved tool that works pretty decent, takes a couples mins to make and they last, just kicks up its fair share of burrs.