DFRobot L298 motor shield and stepper motor doesn't work

hi, hope can me this

i have dfrobot 2a motor shield (http://www.dfrobot.com/wiki/index.php?title=arduino_motor_shield_%28l298n%29_%28sku:dri0009%29)
i want connect stepper motor (http://www.pieterfloris.nl/shop/product.php?id_product=120)

i connected 12 v 0.38 power supply

now when run simple sketch

code: [select]

#include <afmotor.h>


af_stepper motor(200, 2);


void setup() {
  serial.begin(9600);           // set serial library @ 9600 bps
  serial.println("stepper test!");

  motor.setspeed(10);  // 10 rpm   

  motor.step(100, forward, single);
  motor.release();
  delay(1000);
}

void loop() {
  motor.step(100, forward, single);
  motor.step(100, backward, single);

  motor.step(100, forward, double);
  motor.step(100, backward, double);

  motor.step(100, forward, interleave);
  motor.step(100, backward, interleave);

  motor.step(100, forward, microstep);
  motor.step(100, backward, microstep);
}

it nothing tremble bit.
it seems follow instruction (as there leds blinking , delays) doesn't rotate.


i tried 15 v 0.8 , 12 v 2.5 a, no difference

anybody has idea?

that shield uses different pins adafruit motor shield, , afmotor library using.

Arduino Forum > Using Arduino > Motors, Mechanics, and Power (Moderator: fabioc84) > DFRobot L298 motor shield and stepper motor doesn't work

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