The Shapeoko Forum

When mach3 and LinuxCNC send steps and direction signals to step driver, does they do interpolation?

When CAM generate G code, I suppose they do one layer at a time, in that one layer, all movement is in X and Y plane, so it can breakdown to straight line and curve.

Pretty much. Your system needs to: read G-code from a file interpret the G-code plan the motions generate step and direction signals count step pulses to determine the required current in each motor winding put that much current through the motor In all cases, your motor drivers (e.g. Allegro A4988...