All,
I'm setting out to build my second gantry router and working up the nerve to graduate from steppers to servos. Seems like there should be an ideal ppr range for encoders, but just want to check my assumption that mechanical gear reduction from the servo motor to the linear drive mechanism will bump up the encoder count by an inverse fraction. For example, a gearhead with 10:1 reduction will make a 500 ppr encoder act effectively like a 5000 ppr unit while still keeping the quadrature count seen by the electronics down to something manageable at high RPM.
Am I missing anything obvious for a rack and pinion axis?
Thanks,
Tom