So, i am starting to search some good spindle to my 3 axis machine ( want to start machining metal ) and i have some doubts about it, like, can i control the speed of spindle and inverter combo in mach3 ? if not how can i use powerful spindles that can have the rpm controlled in g-code ? ( like 1 kw spindle or less, minimum 600w ), i only know the basics about eletronics, i am just finishing my mechanic technician course, so can someone give me a fast-learning about mach3 speed control ?