Two types of electrical motors are used extensively in automation applications: step motors with open loop operation and servo motors with incremental or absolute feedback. The first type of application requires the motor to reach final position and hold the position. Low cost step motors are typically used because feedback is unnecessary, and with current kept constant through the phases, step motors hold a position with a fairly high level of static torque. The second type of application requires accuracy and smoothness during the motion as well as at the final position. For this application, higher cost servo motors are used with either analog or digital feedback, where the motion controller provides a PID filter or something similar for accuracy at all times…
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Tags: Galil, Electromate, Closed Loop, Motion Controller, Motion Control, Motor Control, Automation, Closed Loop Control