The Encoder That Was Too Coarse We picked a 100 PPR (pulses per revolution) encoder for a servo axis with a 5 mm ball screw lead. The position resolution was: lead / (PPR × 4 quadrature) = 5 mm / (100 × 4) = 0.0125 mm per count. That seemed fine. On the machine, the …

Continue reading “Encoder Resolution: PPR Selection for Servo Positioning and Velocity Control”