@JayDent, I posted info on the SpeedPWM signal elsewhere in the forum. Maybe this will help you understand the signal a bit better, although your numbers do seem a bit off. It seems like you connected it properly although I don’t know how much 12V current your laser driver and module draw. I don’t think the 12V output of the Longmill control box is very hefty. You might want to check it’s capability versus you Laser’s max draw.