Abstract:
Computer controlled stepper motor is one of the most versatile forms of
positioning systems. Open loop control of stepper motors suffers from a major
disadvantage, that the rotation of the rotor becomes oscillatory and unstable in
certain speed ranges. This study presents the micro stepping technique, which
overcomes the problem of instability and at the same time provides high accuracy
for micro stepping applications.
This technique improves electronically resolution of the stepper motors and
suppresses oscillations due to effects of mechanical resonance. This has greatly
enhanced its usefulness in modern control applications.