Motors

Motors and their driving circuits are some of the most important parts of the CandyFab or any 3D printer.

Pro's
- Control. Hobby Servos can be easily controlled from one board eliminating much on the cost of drivers that stepping motors have.
Con's
- Cost. Servos can cost more up front.

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Pro's
- Cost. Stepper motors are relatively inexpensive to produce and purchase.
- Simplicity of drive. Stepper motors can be driven by a relatively easy "binary" switching on or off the coil currents. Unipolar stepping motors in particular can be driven by simply closing switches in a set order.
Con's
- Noisy. The rapid pulsing of coil currents can make stepper motors into effective speakers.
- Inaccuracy. In a number of circumstances a stepper motor may fail to make a step when requested or overshoot the set position because of momentum. A common solution is to introduce a position sensor or a full feedback mechanism, effectively defeating the cost advantage versus servo motors.

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