USU ECE 5320 - DC Motor Servos (20 pages)

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DC Motor Servos



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DC Motor Servos

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Pages:
20
School:
Utah State University
Course:
Ece 5320 - Mechatronics
Mechatronics Documents

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ECE5320 Mechatronics Assignment 1 Literature Survey on Actuators DC Motor Servos Prepared by Robert Silver Dept of Electrical and Computer Engineering Utah State University 3 10 2006 Slide 2 Outline 01 13 19 Reference list To probe further RC Car Servo Basic working principle illustrated A typical sample configuration in application application notes Major specifications Limitations Commercial servo motors and examples ECE5320 Mechatronics Assignment 1 Survey on sensors and actuators Slide 3 Reference list http zone ni com devzone conceptd nsf webmain http www allegromicro com techpub2 compumot a03 pdf G mechatronics Intro to RC Servos htm 01 13 19 ECE5320 Mechatronics Assignment 1 Survey on sensors and actuators Slide 4 To explore further survival pointers of web references etc http zone ni com devzone conceptd nsf webmain www globalspec com http www allegromicro com techpub2 compumot a03 pdf http www electricmotors machinedesign com http www aerotech com products amps amplifiers html http www netmotion com htm files mc servo driver htm 01 13 19 ECE5320 Mechatronics Assignment 1 Survey on sensors and actuators Slide 5 RC Car Servo Major applications Steering motor for rc cars Positioning of a shaft Reversible positioning Motion control 01 13 19 ECE5320 Mechatronics Assignment 1 Survey on sensors and actuators Slide 6 RC Car SERVO Example Controlling of the servo motors is used using pulse controlling The control pulse is positive going pulse with length of 1 to 2 ms which is repeated about 50 60 times a second Details in the figure below 5vdc 1 2 ms 18 25 ms Sending 1 ms pulses sets the servo to one end position and sending 2 ms pulses sets it to the other end position Sending 1 5 ms pulse sets the servo motor to the center position 01 13 19 ECE5320 Mechatronics Assignment 1 Survey on sensors and actuators Slide 7 Theory of Driving RC servos The pulse width to the servo is the most important deciding factor of its desired position Frequency of the pulses must be



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