not long ago i bought a bunch of IB462-FE1 stepper drives. i haven't been able to get them working though. there is a mild difference between these and a standard IB462. they do not have a half/full pin on them, instead they have a +5V input pin. i opened one up to take a look, and there is a pair of optocouplers in there and l298/l297 drive translator chips.
if anyone has had any experience with these please help me out... i am going totally bonkers trying to decide what the issue could be.