by Douglas W. Jones - UNIVERSITY OF IOWA Department of Computer Science

• - Introduction

• - Statics

• - Half-Stepping and Microstepping

• - Friction and the Dead Zone

• - Dynamics

• - Resonance

• - Living with Resonance

• - Torque versus Speed

• - Electromagnetic Issues


In any presentation covering the quantitative physics of a class of systems, it is important to beware of the units of measurement used! In this presentation of stepping motor physics, we will assume standard physical units:

A force of one pound will accelerate a mass of one slug at one foot per second squared. The same relationship holds between the force, mass, time and distance units of the other measurement systems. Most people prefer to measure angles in degrees, and the common engineering practice of specifying mass in pounds or force in kilograms will not yield correct results in the formulas given here! Care must be taken to convert such irregular units to one of the standard systems outlined above before applying the formulas given here!

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