Originally Posted by
hfjbuis
The power supply has enough power to drive these 3 steppers but the input on the board is 24V and your supply delivers 12V max. However I can't image the steppers wouldn't run at 12V.
I searched the internet for half an hour but didn't find any information about the woodpecker stepper pinout. I guess, the stepper coil pins are A- A+ B- B+ (A is a coil and B is a coil), because the stepper pin layout on the driver board has this layout and Ramps and other grbl boards also use this layout. This means you should measure a low resitance between pin 1 and 2 (and pin 3 and 4) on the connector at the stepper. Pin numbering is 1,2,3,4.
Try to run at 6 rpm
Increase the current if the stepper doesn't get hot. Just turn the pot meter on the board. You hear more noise if the stepper gets more current. If it doesn't help, put the pot meter back to its original position (compare it to the other 2 pot meters).
Measure the supply output at load. Measure also at the board to detect a bad/lose connector.