Re: help on 10 wire stepper motor

I think, if you try a continuity test that you'll find:
There are 2 sets of isolated poles i.e. 2, four pole, 5 wire steppers.
With a multimeter on Ohms you will probably find very high resistance between any one wire and 5 others - that is they belong to the 'other set' and a fairly low resistance between any particular wire and the other 4 in the same set.
If you measure each wire to the other four in a set then one wire will show half the resistance to the other combinations - that is the common for that set and the other 4 are the poles. Pole to Pole measurement will give you the resistance through 2 poles. Pole to common is only 1 pole.
you'll just have to find the correct sequence by trail and error then....
It should run with just one set connected - but by using both sets alternately you'll halve the step size.
Hope this helps. It's only a (semi) educated guess.

Jon.

zeb wrote:
Hi,

I have a surplus stepper motor which I plan to use in robot project.
Unfortunately I have not been able to understand its wiring. (It has
10 wires coming out of it.). So I dared to open it up to look inside
so that it might clear the matter further. I have not had much success
after opening it either. There fore this request for help.

This is what it says on the motor:

Model: A2279-9214
Vextra Stepping Motor
4-Phase 0.9DEG/STEP
U.S. PAT. NO. 4,385,247
DC 12 V 0.3 A
RX7 15859

ORIENTAL MOTOR CO. LTD.
MADE IN JAPAN.


I took photos of it in the dis assembled state. Links to those are
given below:

http://s71.photobucket.com/albums/i148/chills_01/



Please note that:

1. There are 8 poles on the stator.
2. The rotor has been divided into two parts. The "teeth" on each part
are not in line, the valley on one, is lined with the peak on the
other.
3. There are 10 wires coming out of the motor.

I have scoured the net in detail. The model no. is not mentioned in
the "Obsolete" section of the Oriental Motor website of europe/
singapore.

Having exhausted all my resources I have come looking for help here.

Any help is greatly appreciated.

Regards

Zeb

.

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