Hello everybody!
I just received my makerbot plastruder. The problem is that when I press extrude on the host software the motor doesn't move and it makes a high pitched sound. But when I press the reset button on the Arduino, it spins fine.
Sounds like you are running the reprap host software that drives a stepper motor. The RepRap s/w no longer supports a DC motor although I think a couple of people have hacked it. You might be better using the Makerbot firmware and Replicator-G
