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2. STEPPER MOTOR
The stepper–motor is one of the most commonly
used pieces of equipment in amateur and hobby
electronics. You’ll use it at the heart of many of your
creations because of its capacity for extremely
delicate control.
http://proto-pic.co.uk
3. STEPPER MOTOR
Unlike a brush motor, the stepper–motor moves in
definable increments. The increments are defined
by the number of teeth, or “steps” on the gear
wheel – and the number of electromagnetic teeth
arranged around the gear.
http://proto-pic.co.uk
4. STEPPER MOTOR
The stepper moves through increments when the
electromagnets on the gear surrounding it are
activated. The magnets are activated in sequence,
making the movement of the wheel predictable in
the extreme. As long as the stepper – motor is
sized properly for your application, you can predict
its movement with extraordinary accuracy.
5. STEPPER MOTOR
The more teeth your gear wheel has, the smoother
the operation of your stepper and the more precise
its predictability. This is because the increments
through which the stepper gear moves are equal
divisions of its full circumference, measured by the
teeth.
http://proto-pic.co.uk
6. STEPPER MOTOR
The electromagnets arranged around the gear
wheel are powered by external circuitry, often
circuitry made on a micro controller board. The
power sent to the magnets causes them to attract
points on the stepper wheel in turn, hence the
rotation.
http://proto-pic.co.uk
7. STEPPER MOTOR
The rotating motion of the stepper–motor wheel
can be jerky if there are only a limited number of
teeth. This is because a large tooth winds past the
magnetised point before snapping back into its
field. That’s why the more teeth you have on your
motor, the smoother it will operate.
http://proto-pic.co.uk
