Ch 19

Stepper motor and servomotor are general terms for two of motors used in motion control.

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Stepper motors are always AC motor.

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Typical universal motor applications include pen positioning, rotory and indexing table control, robotic positioning, machine tools, laser positioning, and printer control.

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Stepper motors provide good positional accuracy both at rest and while in motion.

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A typical servomotor drive uses a closed-loop control system with feedback from an encoder mounted on the motor or load.

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The advantage of servomotor control are shorter positioning time, higher accuracy, better reliability, and improved repeatedly in the coordination of axis motion.

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Typical applications of linear motor positioning include grinders, metal-forming machines, transfer lines, and the precise control of valves in continuous process applications.

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A processor can store several continuous-mode profiles in its memory and send them to the interface during the program execution.

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The main parts of a linear induction motor are the field windings, which are stationary, and the armature, which rotates.

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A linear induction motor has two power leads and a ground wire coming out of the motor.

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