Hello, everyone. I have a problem with Azteeg witch looks like a mystery - it will not power nor move motors except for extruder. I've measured all the signals on drivers both oscilloscope and multimeter - the signals looks ok, both Step and Dir, 12v is there and 5v is also there. Yet no potential difference between the stepper contacts, but it exist between gnd and each contact (12v). Motors are not even locking, they stays off, while X motor is working ok. swapping drivers\motors reveals they all working.
I have no clue what else to test. I tried flashing repetier and test code - both have good signals, but only x motor is powered. What could it be?
This is the board,
