User`s manual

ROBOT . HEAD to TOE
Product User’s Manual – SD02B
Created by Cytron Technologies Sdn. Bhd. – All Rights Reserved
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1.2 General Description
Driving stepper motor is common necessity in most robotic project. A stepper motor is a
brushless, synchronous electric motor that can drive a full rotation into a large number of
steps. Stepper motor is ideally suited for precision control. This motor can operate in
forward/reverse with controllable speed from a microcontroller through a transistor driver
circuit. There are various kinds of stepper motor. Some example are variable reluctant stepper
motor, permanent magnet stepper motor, bipolar/unipolar stepper motor, bifilar stepper motor
and hybrid stepper motor. For more description of stepper motor, user is advice to refer to
Wikipedia at: http://en.wikipedia.org/wiki/Stepper_motor. This driver, SD02B is to drive
stepper motor in bipolar method.
SD02B is designed to drive stepper in 2, 5 or 10 micro steps. This will offer smoother
rotation of the stepper motor. Of course, the step angle will depend on the specification of
stepper motor being drive. As an example, if the stepper motor being drive is 1.8° per step
and use 1/10 micro-stepping, the smallest step (1 pulse) is 0.18°. This will offer much better
resolution (°/step).