I had quite a struggle getting them to run due to a) pretty crappy chinese documentation and b) I missed the fact that each motor had it's own enable line that must be held high during operation.
But they seem to be working fine and are actually a lot less noisy than I expected them to be.
Hopefully they'll have enough juice to drive my rig...
|1) Driverboard, power supply and X,Y,Z-stepper motors. In case you're wondering why there are unplugged cables everywhere - the motors are bi-polar 6-cable versions and only 4 are required. They will be cut appropriately during assembling...|