This is a very old Wells Index mill that I reworked the electronics. It has the original steppers, Gecko drives running at 76V, and a SmoothStepper. I am using Mach3 right now to interpret the G-code. This short clip is that last little bit of roughing and then a quick finish pass at my max speed of 100IPM. I am cutting with a 0.625 dia Cobalt 3 flut end mill and this let me tell you it can slice this aluminum like butter. I tool path is setup to limit peak spindle horse power to about 1.3Hp, I have a 3Hp spindle but I don't like to push it.