I have a new STB5100 5axis USB MACH3 board. I can't get the steppers to turn. The DROs indicated movement, but the steppers just stay in hold.
I have doubled checked the wiring and the only thing I can find is no 5v at the 5v post on the motion board. The USB cable does have 5v at it and the little power light for the USB does light up. I'm not sure if the 5v to the driver is supposed to be constant, or only when the stepper is active/traveling. I have a stand alone 5v power supply but since there is no ground wire / 5v- for the driver I'm also not sure how to hook it up for a better test. Where would the 5v- and ground go?

Thanks in advance for the help!