Stepper motor doesn't run

[aerosam]

Hi

I am using the motor shield and the PF35T-48L4 stepper motor that i got from adafruit.
I determined that the 2nd and 5th wires are the center taps and connected them to ground on the shield.
I connect coil 1 to M1 and coil 2 to M2. Power up the shield with a 5V power supply, the green LED glows. Loaded the following sketch onto Arduino UNO.

#include <AFMotor.h>


AF_Stepper motor(48, 2);


void setup() {
Serial.begin(9600); // set up Serial library at 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);
}
Nothing happens
I got the servo and dc motors to run like a charm.

What am i doing wrong?

Thanks
Sam

[aerosam]

Forgot to mention that i changed
AF_Stepper motor(48, 2); to
AF_Stepper motor(100, 1); This is because i am using port 1, (i.e. using M1 and M2). I set the value 100, because the motor is supposed to be a 3.6 degrees/step motor.

[adafruit_support_bill]

I set the value 100, because the motor is supposed to be a 3.6 degrees/step motor.

Where does it say that? That motor is 7.5 degrees/step. In any case that value is only used to calculate speed. The motor should still run.

Does the motor appear to be getting any power? Does it hum or try to move at all?

It sounds like you have correctly identified the center-taps. You should have brown and black wires for one coil and yellow & orange for the other. If you post photos of the front & back of the shield we will check over your assembly.

[aerosam]

There was a loose contact in my soldering. It works fine now.
I thought step angle was 3.6 degrees based on
http://www.allelectronics.com/make-a-st ... IRE/1.html

[adafruit_support_bill]

The data sheet for the PF35-48 motor we sell is here. The "48" in the model number refers to the number of steps/rev.