Defective stepper or driver

[shadesdude]

Alright, this has had me pulling my hair out.

I am using a stepper driver from stepmaster - datasheet

I am pretty sure it is working correctly. I have adjusted the current and PFD according to that sheet. Voltage tests show ~5v comming out of A and B# all the time and ~5 v out of A# and B when I enable the axis.

My stepper motor is Lin Engineering's 4218L-04-07 1.2A 6 wire stepper wiring guide (red, white, blue, green, yellow, black)

I don't actually have a data sheet but I have confirmed that the wires that are shown in the wiring chart are infact correct through resistance testing. So when I connect the servo according to the half coil method I should have

-----Setup 1---Setup 2
A----Red-------Blue
A#---White-----White
B----Green------Black
B#---Yellow-----Yellow

Neither of these setups produces anything but a small shuddering that occurs even when the axis is disabled. So I tried to wire it in series (A-red, A#-blue, B-green, B#-black) this time with no results. I then tested the servo by rotating the contacts between a 9v and I was able to get it to rotate fully (with a wire in between each fingers this was really fun). So maybe I'm missing something obvious or I just misread something but I'm out of ideas so any help would be greatly appreaciated.

[pminmo]

I would suggest you contact stepmaster. Doubt the motor is the problem.

[kreutz]

I don't actually have a data sheet but I have confirmed that the wires that are shown in the wiring chart are infact correct through resistance testing. So when I connect the servo according to the half coil method I should have -----Setup 1---Setup 2 A----Red-------Blue A#---White-----White B----Green------Black B#---Yellow-----Yellow Neither of these setups produces anything but a small shuddering that occurs even when the axis is disabled

Something is wrong, even when using the 6 wires motor in bipolar full coil you should have 1 wire for each phase unconnected, in the case of full coil it is the center wire for each phase the one that is not connected (equivalent to bipolar series), in the case of half coil is one of the extremes for each phase, the ones that should be left unconnected.