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Unimatic Ltd Stepper motor pinout



Stepper motor from Unimatic Engineering LTD

The label around the side reads :

    "Unimatic Engineering LTD
    Granville Road Works London NW2 2LN
    England

    Sigma instruments, INC
    MODEL
    20-2215D200-F1.5"


I couldn't find the wiring scheme for this stepper motor anywhere on the web, so I found the wiring by testing and trial and error. To save someone else having to spend time re-inventing the wheel, here's the wiring colours for a unipolar setup.

I wired mine up as unipolar with colours as follows :

 Colour Connection
  
Red
 Coil A Common
White/red
 Coil A
White/black
 Coil B Common
Black
 Coil B
White/yellow Coil C
Yellow Coil C Common
Orange Coil D
White/orange
 Coil D Common