Stepper drivers:

The old stepperdrivers were HY-DIV268N-5A's. they're kinda bulky and lost steps sometimes.

The new stepperdrivers are TI DRV8711 based. This chip has automatic PWM generation, stalldetection and some more features. We hope that these give us better reliability. The pcb's are currently being made.

we have a drv8711 to drive the mosfets, mosfets in package SOT-223. max draincurrent=7A.

We can choose to drive them at 24 -48V.

to drive the lines for the faults, stall detection etc i use a schmitt triggered buffer.

The connector is a TE card-edge connector