RE: [CAD_CAM_EDM_DRO] Stepper identification for a newbie

Reading your posting for a second time I am a little confused. You say there
is a connector with ^ conductors. Does this mean the connector is on the
motor? If so, then you have a motor that can be run as a unipolar, bipolar
series coil, or bipolar single coils. The internal wiring would be as
follows (excuse the ASCII art)

A--| |--B
| |
a Center Tap -| |- b Center Tap
| |
a--| |--b

If you only have 4 conductors than it is same as above minus the center
taps.

You can figure out the wires by putting an ohm meter on them A to a and B to
b will have equal resistance and will be the highest reading you get (likely
to still be under 10 ohms probably less). Either end to the corresponding
center tap will be 1/2 the resistance. Anything on the A side will have no
continuity to the B side. Once you figure out the ends from the center tap
you can figure out the rest by hooking them to an appropriate driver. If you
reverse one winding the motor will just oscillate and not revolve. Then just
reverse the polarity of one winding.

If you use them as a bipolar you can either hook a winding from one end to
the center tap and not use the other end, or hook from one end to the other
and not use the center tap. Full winding is more torque at low speed and 1/2
winding is greater top speed.

Tim
[Denver, CO]

> Hello all!
>
> I am very new to this and am in need of some help with some steppers
> that I bought off of ebay. The price was very low so I thought I
> couldn't go wrong even if they were junk. The seller told me that he
> couldn't get any data on them from the manufacturer as they were
> produced as an OEM part.
>
> Here's what I know about them:
>
> They are 1 5/8" square and 1 1/2" in length.
> The label on the back says the name 'Astrosyn'
> P/N: 147-0106-00
> Type: 17PM-K310-P1V
> No.: T8805
>
> "Minebea Co. LTD"
> "Made in Thailand"
>
> There is a connector on the top with six conductors. The wiring
> harness only uses four of them. Looking from the shaft end of the
> motor and reading left to right they are colored as:
>
> 1- Yellow
> 2- <not used>
> 3- Red
> 4- Blue
> 5- <not used>
> 6- Orange
>
> Any help or further source of information on these little gems would
> be greatly appreciated.
>
> Thanks from the new "Guy"!
>
> Guy Lopes
> guylopes@...