I've had 2 Kollmorgen 6410 drivers (new old inventory) fail in the past year. My latest quote for one was $380. Just seems like A LOT of money for a stepper driver. I purchased a $35 DM860 driver and wired it in but not getting any movement in my stepper. Anyone have experience with this type of swap that could give advice? I have a Multicam SF series machine w/an upgraded RPD-24 controller. I'm not sure what the pulse widths are from the controller and if that may be an issue. The DM860 is putting out voltage to the stepper (not able to turn and I can hear it powered up) but it won't move when I start the homing sequence or try to move it manually. Any advice would be greatly appreciated! Thank you much.