Can anyone help me connect a bipolar stepper motor and get it running. I have found tutorials with older Arduino Motor Shields but no the R3. Do I connect all 4 of the stepper motor wires to the A+,A-,B+,B- ? And then control the steps with the #12 & #13 pins (Dir A, Dir B)
Yes. Be sure to set pins 3 and 11 (PWM-A and PWM-B) to HIGH to turn on power. You should probably also turn 8 and 9 to LOW to turn off the brakes.
If you want to hold position without heating up the stepper you can use analogWrite() on 3 and 11 to reduce the power. If you want to release the motor so you can turn the shaft by hand, set 3 and 11 to LOW.