Now I am in the period of select which mill i want to buy, mill like EMCO Fb-2 clone, and RF45 etc.
and I want to convert it to CNC, and I hope i can use 2 phase stepper motor only (due to easy to get, cheap to drive,I can diy the driver )
I read a book ,it have some simple formular , but i think that calculate is not very nicety.
does any free software or tell me such formular that can calculate the torque needed for motor?