So I started hand writing some code and it went quite well. I used a software called NC Corrector to simulate the toolpath and liked it. But this afternoon I decided to try adding in parameters and doing a bit of math with them to simplify one of my operations. The trouble is that NC Corrector doesnt recognize the "[P101]" type of commands. Im pretty sure Im using them properly. Does anyone know of a free simulator that speaks Cent 5? If not, I will just shoot it as close as I can and see what the mill verifies it as