Newbie question on pulse width using the Stepper library

DaveX · February 18, 2024, 10:53pm

Maybe show the code?

If Stepper.h is used with a step+dir driver with the one of the quadrature output schemes, you need to send 4x the number of steps and the pulsewidths are two steps wide.

Stepper.h in 2-wire mode sends these signals:

github.com

arduino-libraries/Stepper/blob/c0e8e2e2826b9d80ee30cfcc0051663802fe5a25/src/Stepper.cpp#L234-L253


      
          void Stepper::stepMotor(int thisStep)
          {
            if (this->pin_count == 2) {
              switch (thisStep) {
                case 0:  // 01
                  digitalWrite(motor_pin_1, LOW);
                  digitalWrite(motor_pin_2, HIGH);
                break;
                case 1:  // 11
                  digitalWrite(motor_pin_1, HIGH);
                  digitalWrite(motor_pin_2, HIGH);
                break;
                case 2:  // 10
                  digitalWrite(motor_pin_1, HIGH);
                  digitalWrite(motor_pin_2, LOW);
                break;
                case 3:  // 00
                  digitalWrite(motor_pin_1, LOW);
                  digitalWrite(motor_pin_2, LOW);
                break;

... so it takes 4 steps to cycle a "Pulse" line once.

(ref Stepper Driver with Quadrature from Stepper.h or Encoder)

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Newbie question on pulse width using the Stepper library

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