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'Help! 6 wire Stepper motor wire hookup- different '
1999\09\17@143440 by Jon Petty

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Hi

I just started to get my circuit ready for my first stepper motor project. It
is a small 6 wire stepper. I have two styles of steppers the colors are
(blue,brn,red,wt,brn,orange) and the other (yellow,brn,blk,red,brn,orange). I
bought them surplus from All Electronics.

How do I determine which wires are common power and which wires go to coil
1,2,3,4 respectively?

Thanks

Jon

1999\09\17@150930 by Dave VanHorn

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> How do I determine which wires are common power and which wires go to coil
> 1,2,3,4 respectively?


An ohm meter.

You have two sets of three wires. A quick continuity check will show which
are in which set.

Looking at one set, you have Center, PHA and PHB  If you take one of the
three wires, and measure R to the two other wires, then you'll either get a
low and a high reading  or two equal readings.  If it's two equals, then you
have the center. Mark that one, and do the same for the other side.

If it's unequal, then the lower reading was the center, mark that one, and
do the same for the other side.

Now that you have two centers, and four phases, you need to get the phase
order right.  Connect the two center leads to a battery, (You'll have to
experiment to find the right voltage, all you need is enough to spin it.)

Tape a flag on the motor shaft, and then tap the negative battery lead to
each phase lead in some order. Keep swapping wires until you have a constant
motion in one direction when you go ABCDABCD  Now, just mark the wires
A,B,C, and D, and you're done.

1999\09\17@170323 by TIM

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use an ohmmeter
resistance setting and make a drawing
u have 6 wires
make drwg a circle to indicate motor ..and three wires to top and three
wires to bottom
one wire on top and one wire on bottom lable ct..4 center tap....center taps
will eventually tie together eventually......same connection.....
use ohm meter and start probing
clip on a wire and test 4 continuity some ohmage and not infinity
.......open circuit...no!
there shall be only 2 wires that will show continuity with respect (ref) the
one that you have clipped to as a common (ref)to  one of the ct ...center
taped wire,,,,,got me so far?
start labeling the colors
a full winding will have say 100 ohms resistance.......while the center tap
to one side of the winding shall show almost half of the value say 50
ohms..........threre will be 2 sets of 3 wires...............once you have
found the ct..center taps now what is the voltage of the motor?
12 vdc or 6 vdc?
get a battery or a  well filtered supply pwr pak of that value(i.e
voltage) and take ground to the common tie of ct.center taps.....common
ground of motor ct.......
touch one lead at a time with the positive lead of the supply...notice a
small step in the rotation of motor..output shaft...... keep trying this
will get fustrating i know have done so many times..keep at it.....find the
right sequence for a steady rotation step .........you must make at least 8
to 10 counts to be sure  of rotation......
most times a piece of masking tape on the motor out put shaft helps..like a
flag to see better the rotation.........
please e-mail me directly as not to disturb the list if you need
help.....tim
{Original Message removed}

1999\09\17@170537 by Stevens, Kurt

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Sounds like center tapped dual phase unipolar steppers. If so, you have two
coils and two center taps, one for each coil. My first guess would be that
the two same colored wires are the taps, brown in both of your cases. To
find which wires belong to each center tap and verify which wire is the
center tap, use an ohmmeter. You will measure infinite resistance between
any two wires that are not of the same coil, you will measure twice the
resistance from end tap to end tap that you will measure from center tap to
end tap. So, if in the case of your first motor, lets assume that
blue-brown-red is end-center-end of one coil and white-brown-orange is
end-center-end of the other coil. You might measure 20 ohms from blue to
brown and 40 ohms from blue to red. Group your coil wires first, find the
center taps next. Then the fun begins. Now you have to find out your step
order. That is a trial and error process. Hook it up to your driver
according to center tap and if your driver doesn't spin it, but wiggles it,
swap the two end taps of a single coil with each other for starters. If that
doesn't work, ask for more help. Have fun!

       Kurt Stevens

{Quote hidden}

1999\09\17@183734 by Erik Reikes

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At 02:32 PM 9/17/99 -0400, you wrote:
>Hi
>
>I just started to get my circuit ready for my first stepper motor project. It
>is a small 6 wire stepper. I have two styles of steppers the colors are
>(blue,brn,red,wt,brn,orange) and the other (yellow,brn,blk,red,brn,orange). I
>bought them surplus from All Electronics.
>
>How do I determine which wires are common power and which wires go to coil
>1,2,3,4 respectively?

A multimeter and some methodical probing...

-Erik Reikes

>
>Thanks
>
>Jon

1999\09\18@151714 by russellh

picon face
Jon Petty wrote:
>
> Hi
>
> I just started to get my circuit ready for my first stepper motor project. It
> is a small 6 wire stepper. I have two styles of steppers the colors are
> (blue,brn,red,wt,brn,orange) and the other (yellow,brn,blk,red,brn,orange). I
> bought them surplus from All Electronics.

<snip>

       The Brown wires are the commons.    Blue and red are the ends of one
coil, white and orange the ends of the other.

       The one with yellow and black wires is similar.

       The browns aren't common to each other, you must do that yourself.

       A quick check of a stepper is to plug an LED into the connector, and
spin the shaft.  The LED will light if the two  pins of the connector go
to the same coil, one to common and the other to one end.

       Hooking the LED up to the ends of the coil produces no light.


> Thanks
>
> Jon

All right.  I like those steppers, $1.25 each in quantities of 10. With
a lead screw and nut! Can't beat the price.

Russell Hedges

1999\09\20@084039 by Jon Petty

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part 0 2247 bytes content-type:multipart/mixed; boundary="part2_8bd1050b.25141a39_boundary" (decoded 7bit)

I used an ohm meter and a little trial and error and figured it out so
please ignore


Jon

In a message dated 9/17/99 3:27:05 PM US Mountain Standard Time, Phxsys3
writes:

<< Hi

I just started to get my circuit ready for my first stepper motor project.
It is a small 6 wire stepper. I have two styles of steppers the colors are
(blue,brn,red,wt,brn,orange) and the other (yellow,brn,blk,red,brn,orange). I
bought them surplus from All Electronics.

How do I determine which wires are common power and which wires go to coil
1,2,3,4 respectively?

Thanks

Jon
-----------------


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Date: Fri, 17 Sep 1999 18:27:05 EDT
Subject: Help! 6 wire Stepper motor wire hookup- different colors
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Hi

I just started to get my circuit ready for my first stepper motor project. It
is a small 6 wire stepper. I have two styles of steppers the colors are
(blue,brn,red,wt,brn,orange) and the other (yellow,brn,blk,red,brn,orange). I
bought them surplus from All Electronics.

How do I determine which wires are common power and which wires go to coil
1,2,3,4 respectively?

Thanks

Jon

Return-path: RemoveMEPhxsys3TakeThisOuTspamaol.com
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Full-name: Phxsys3
Message-ID: <TakeThisOuT57b9f16b.2513e341EraseMEspamspam_OUTaol.com>
Date: Fri, 17 Sep 1999 14:32:33 EDT
Subject: Help! 6 wire Stepper motor wire hookup- different colors
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Hi

I just started to get my circuit ready for my first stepper motor project. It
is a small 6 wire stepper. I have two styles of steppers the colors are
(blue,brn,red,wt,brn,orange) and the other (yellow,brn,blk,red,brn,orange). I
bought them surplus from All Electronics.

How do I determine which wires are common power and which wires go to coil
1,2,3,4 respectively?

Thanks

Jon

1999\09\20@091138 by Jon Petty

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part 0 1219 bytes content-type:text/plain; charset="us-ascii" (decoded 7bit)

I just started to get my circuit ready for my first stepper motor project. It
is a small 6 wire stepper. I have two styles of steppers the colors are
(blue,brn,red,wt,brn,orange) and the other (yellow,brn,blk,red,brn,orange). I
bought them surplus from All Electronics.

How do I determine which wires are common power and which wires go to coil
1,2,3,4 respectively?

Thanks

Jon

Return-path: EraseMEPhxsys3spamaol.com
From: RemoveMEPhxsys3EraseMEspamEraseMEaol.com
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Message-ID: <RemoveME57b9f16b.2513e341spam_OUTspamKILLspamaol.com>
Date: Fri, 17 Sep 1999 14:32:33 EDT
Subject: Help! 6 wire Stepper motor wire hookup- different colors
To: RemoveMEPICLISTTakeThisOuTspamspammitvma.mit.edu, EraseMEstampsspamspamspamBeGoneparallaxinc.com
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Content-Type: text/plain; charset="us-ascii"
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X-Mailer: AOL 4.0 for Windows 95 sub 214

Hi

I just started to get my circuit ready for my first stepper motor project. It
is a small 6 wire stepper. I have two styles of steppers the colors are
(blue,brn,red,wt,brn,orange) and the other (yellow,brn,blk,red,brn,orange). I
bought them surplus from All Electronics.

How do I determine which wires are common power and which wires go to coil
1,2,3,4 respectively?

Thanks

Jon

1999\09\20@101043 by Wagner Lipnharski

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Jon Petty wrote:
> I just started to get my circuit ready for my first stepper motor project. It
> is a small 6 wire stepper. I have two styles of steppers the colors are
> (blue,brn,red,wt,brn,orange) and the other (yellow,brn,blk,red,brn,orange). I
> bought them surplus from All Electronics.
>
> How do I determine which wires are common power and which wires go to coil
> 1,2,3,4 respectively?

Jon, six wires means the two coils are apart, 3 wires per coil.

If you have an Ohmmeter, just measure the resistance between any 2
wires, when you find an open circuit, it means both wires are not from
the same coil, then isolate one.  When you isolate the single coil 3
wires, you will have 3 measurements between them, the highest resistance
means the not used wire is the center tap, and goes to +Power or Ground
(according to your unipolar drivers), while the other two wires goes to
the drivers. The same for the other coil.

If you don't have an Ohmmeter, connect a small lamp (Christmas tree lamp
is ok) to any two wires of the stepper and rotate the motor shaft by
hand vigorously, the two wires that makes the lamp lit brightness are
the extremes of the coil, while the low brightness identify the center
tap.  The same experience is just shorting circuit any two wires
together, heavy load when rotating the motor shaft identifies the
extremes of the any coil, while light load means the center tap
connected to any extreme. This effect is because the stepper acts as an
generator when its shaft is externally rotated.

If you are planning to use bipolar connection, just forget the center
wire and use only the two that shows the highest resistance, connecting
them to the bridge.

Wagner.

1999\09\20@135248 by Jon Petty

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Thanks for all the help

The scope method I found to be the easiest as described in the app note sent
to me by RemoveMEstevebKILLspamspamkcbbs.gen.nz. It was detailed and easy to understand.

Thanks again everyone

Jon

1999\09\20@145339 by Andy Kunz

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face
>How do I determine which wires are common power and which wires go to coil
>1,2,3,4 respectively?

With an ohmmeter.  Draw a schematic of a motor, then measure the resistance
between each point.  This will tell you.

Andy

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'Help! 6 wire Stepper motor wire hookup- different '
2000\03\07@113320 by Joe McCauley
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The most likely configuration for a 6 wire motor is

one common wire for power, 2 phase wires connected to this. equal resistance
between the common wire and these two phases, twice this resistance between
the phase wires.

The same applies for the other 2 phases.

Once you have sorted out your power lines, just try the motor connected to
your system. Swap around the phase wires until you get the correct rotation.

Joe

{Original Message removed}

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