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Posted by zeb on May 25, 2007, 6:32 am
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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Posted by Spehro Pefhany on May 25, 2007, 8:07 am
On 25 May 2007 03:32:18 -0700, the renowned zeb
>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
Have you tried probing it with an ohmmeter?
Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
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Posted by JonSutton on May 25, 2007, 9:51 am
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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Posted by Pogo on May 25, 2007, 1:23 pm
> 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.
>
> ...
The patent itself can be found at this link: =
http://www.google.com/patents?id=cNo1AAAAEBAJ&dq=4,385,247
As diagrammed, I count only 8 wires for 8 poles, but I'm guessing the =
"extra" 2 wires are a result of it being wired in 2 sets of 4 poles =
each, which would give you 5 wires per set. Each 2 poles within a set =
has a common wire between them. 4 poles within a set are wired in =
series, with one wire coming out between each 2 pole - giving you a =
choice of how to wire it - unipolar, bipolar, etc.
Hope that helps and everyone *please* feel free to correct me if I am =
leading him wrong !
JCD
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Posted by DaemonWalking on May 28, 2007, 12:50 pm
If you really want the pinouts for the Motor then you could just send
an email to techsupport@orientalmotor.com or call them at
1-800-GO-VEXTA (1-800-468-3982).
Just a thought
The Hirudinea
On Fri, 25 May 2007 13:23:29 -0400, "Pogo"
>> 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.
>>
>> ...
>The patent itself can be found at this link:
http://www.google.com/patents?id=cNo1AAAAEBAJ&dq=4,385,247
>As diagrammed, I count only 8 wires for 8 poles, but I'm guessing the "extra" 2
wires are a result of it being wired in 2 sets of 4 poles each, which would give
you 5 wires per set. Each 2 poles within a set has a common wire between them. 4
poles within a set are wired in series, with one wire coming out between each 2
pole - giving you a choice of how to wire it - unipolar, bipolar, etc.
>Hope that helps and everyone *please* feel free to correct me if I am leading
him wrong !
>JCD
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>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