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Introduction In these pages, we will talk about stepper motors, how it works and how we can interface between that kind of motors and our projects and to the computer. A typical single axis stepper system consists of a
stepper controller, a motor drive, a motor (with or without gearbox), and
a power supply. A stepper is typically commanded by two digital inputs: a
digital pulse train and a direction bit. The stepping drive and motor is
used primarily for position control. And unlike all other motor types,
stepper motor is moved in "steps" (just one step per one command pulse)
and will hold at its present position if no command pulses are received.
The frequency of the pulse train controls the velocity of the motor, where
the number of pulses determines the length of the move. The direction
signal determines in which direction the motor will rotate. For each pulse
from the controller, the drive will move the motor "one step" in the
direction indicated by the direction
command. |
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Stepper Motor
Interface