SIGMA model number codes

Here's the numbering scheme out of Sigma's catalog;

20 - 2215 D 200 - B 075
Rotor DIA/LEN Steppr #steps #leads nom ohms
Style inches B=4,E=6,F=8


So Ian, your motor is 3.7 ohm and I agree with 130 oz in holding torque, I
guess 1 amp and 10 mH based upon similar others listed.
The model you have is not in my catalog.

Tom

>Can anyone help shed light on a stepper motor I've just obtained. Its

marked

>SIGMA INSTRUMENTS INC. Model 20-2235D200 - E3.7B