KD6HQ wrote:Have another look.
The wires noted by #1 and #2 appear to be reversed compared to the order in #3 and 4.
In 3 and 4 the red wire is always on the outside. I'm not sure what effect this would have if any but it does not seem correct to me.
Trust me, it's fine. (KD6HQ, you have a ham license, so you should know something about circuits.
)
The motors have two coils: A (red/green) and B (yellow/blue). In operation, if you were to run with no microstepping, you would send current in the "plus" direction through A, then in the "plus" direction through B, then in the "minus" direction through A, then in the "minus" direction through B in order to accomplish 4 steps in one direction (say, CW). But to go in the other direction (CCW) you would send current in the "plus" direction through A then the "minus" direction through B, then the "minus" direction through A, then the "plus" direction through B. So if you look at just coil A, the sequence is always [plus, minus, plus, minus]. If you look at coil B, the sequence is either [plus, minus, plus, minus] or it's [minus, plus, minus, plus]. See the symmetry? So what happens if one pair of wires is reversed? It just inverts the "starting point" of the sequence, which amounts to changing the direction of rotation. But laine (lwalkera) designed the board with a crossover for one of the coils, so by reversing the plug on the board, you can reverse the direction of rotation of the motor. Regardless of the color codes, if the motor runs in the direction you want it to run, then don't change anything. If it runs in the wrong direction, then reverse the plug.
If the motor were very seriously mis-wired and one of the wires from coil A was showing up in one of coil B's assigned slots (of course with a corresponding mis-wiring of coil B) then no current at all would flow, and the motor would not move at all.
In no case will there be any damage to the board or the motor.