How to tell if a stepper motor has 0.9 or 1.8 degree steps

This is an interesting one. If you are unsure, how can you tell if your stepper motors are 200 (1.8 degree) or 400 (0.9 degree) step motors?


This is a companion discussion topic for the original entry at http://reprage.com/post/32934313511/how-to-tell-if-a-stepper-motor-has-0-9-or-1-8-degree