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:
English
CGS
MKS
MASS
slug
gram
kilogram
FORCE
pound
dyne
newton
DISTANCE
foot
centimeter
meter
TIME
second
second
second
ANGLE
radian
radian
radian
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!
