Minebea Co. 23LM-C057-02 Stepper Motor Wiring

[Snipes44]

I have 3 23lm-c057-02 steppers that I plan to use to drive my JGRO mill. I can't seem to find a wiring diagram for these. Here is what i have for wire colors.

Green
White
Yellow
Red
Blue
Black
Brown
Orange

Any one have a diagram for these or know a way that I can test them to figure out how to wire them to my HobbyCNC Pro board?


I do know that these are pairs:

White/Yellow
Orange/Green
Blue/Brown
Black/Red

Not sure how to figure out the polarity and order of the coils.

[elementip]

Did you purchase these from Vetco in Bellevue, WA?

I believe I have a set of these at home that I got working with a controller. I'll dig them out this evening and send post the hookup diagram. I seem to remember that it was pretty straight forward.

[Snipes44]

Actually got 2 of these moters out of an old HP laser printer that I tore apart. The other one i pick up off ebay. Thanks a bunch for the help. From what I have found on the internet 8-wire are the hardest ones to try and figure out which wire goes where unless you take the motor apart which I would not like to do.

[Snipes44]

So did some more searching on the net tonight on the motors and found this little bit of info.

"...attach A+ and A- to 2 probes of the scope common to ground, and spin the shaft by hand. On the screen they should come out 180degee. out of phase. If one phase is backwards they would look the same. Or if I mixed an A with a B, 90degees out." Source

Had to dig out my 2215A Techtronix scope. Haven't used it in a few years. You could say I was a little rusty on which knob did what.

Connected up the scope to the motor, had to use my drill to get the RPMs high enough to have a nice wave form to compare. Here is what I came up with after testing.

This 1st group I'm going to call "A". This is only for polarity, not the order of the coils.

White -
Yellow +

Black -
Red +

Group "B"

Green -
Orange +

Blue -
Brown +

Figured I would try hooking the motor up to the HobbyCNC controller and see what happens.

I connected all the negatives together and hook those to the COM, hooked the group "A" to the A and a and group "B" to the B and b on the controller.

Motor would move but not very smooth, sometime when I would stop the motion the motor would hum.

Tried different combinations all basically gave the same result.

So any idea on how I figure out the order of the coils?

Getting closer to having mill running.

[Snipes44]

So after a couple of nights seaching the net and a couple hours of testing I think that I have the wiring figured out. The motors will at least spin with not load. Should be able to test with load tomorrow once I get then installed on my machine.

Here is what I have come up with.

Wire Pairs:

+ / -
A - Brown/Blue
B - Yellow/White
a - Orange/Green
b - Red/Black

Will post back with how the load test goes. Helpfully someone else will need this info someday.