Machsupport Forum

General CNC Chat => Building or Buying a Wood routing table.. Beginnners guide.. => Topic started by: Hobbit13 on November 21, 2013, 04:47:38 PM

Title: Connecting an unknown stepper
Post by: Hobbit13 on November 21, 2013, 04:47:38 PM

Recently I'm got the idea to turn a small Proxxon translation table into a CNC machine. I've brought two new motors for the X/Y, and those work fine with Mach3. I also got an old stepper from a very old Hard Disk (Rodime 5.25" ca 10MB, ca 1982). See attached pictures.

I'm sure it's a two phase 6 wire motor, but I do not know how to determine the correct order of the wires.

The first phase is: Red / White / Black (with White the halfway common)
The second phase is: Yellow / Green / Blue (with Green the halfway common).

Resistance per phase is 36 Ohm (thus 18 Ohm between Red/White or White/Black).

I'm using a bipolar 4 wire stepper driver, can someone help to deduct which colors are A, A_, B and B_? The motor doesn't follow the standard color codings.

Any other info on the motor (voltage, torque etc.) is welcome!
Title: Re: Connecting an unknown stepper
Post by: Tweakie.CNC on November 22, 2013, 02:39:38 AM
Hi Hobbit13,

Welcome to the forum.

The centre taps are not used so Red / Black (A, A) and Yellow / Blue (B , B) are your connections.
There is excellent info on steppers at the Gecko site here (