Multiple Steppers at the Same Time

hello,

i have 4 unipolar stepper motors connected arduino. using motorknob control them, can 1 motor activate @ given time. there way have 2 or more motors moving @ same time? thanks

the following code moves 2 motors. moves 1 , other- not both @ same time.

code: [select]

void loop() {
  // step forward 200 steps:
  serial.println("forward");
  mystepper.step(200);
  mystepper2.step(200);
  delay(500);

  // step backward 200 steps:
  serial.println("backward");
  mystepper.step(-200);
  mystepper2.step(-200);
  delay(500);


you can't move them @ same time, can alternate single steps make moving together.

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