Hi guys,
First time I have come across one of these boards, wired it up, only using 22 volts Dc and just the three steppers wired, nothing else.
powers up OK two leds on the board for 5v and 12 v but it doesn't grab the steppers on any of the axis.

Tried a second board and exactly the same. Not connected up to a computer at this point but every box I have built up to now locks the steppers on power up.

According to the data sheet there are three led marked "3 Axis Work Leds" which do not light up but do they only light up when moving ?

Last thing is that there are 4 header pins marked up on the data sheet Pin16, grnd, grnd, pin 17 nothing fitted to these.

Nothing fitted to any of the limit switch pins or E stop as well.

Any clues please ?

John S.