l.c. technology servo motor control / genie software professional development for teachers
TRANSCRIPT
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L.C. TechnologyServo Motor Control / Genie Software
Professional Development for Teachers
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Introduction to the Servo
Servo offers smoothest control
Rotate to a specific point
Offer good torque and control
Ideal for powering robot arms etc.
However:
Degree of revolution is limited
Not suitable for applications which require
continuous rotation
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Contain motor, gearbox, driver controller and potentiometer Three wires - 0v, 5v and PIC signal Potentiometer connected to gearbox - monitors movement Provides feedback If position is distorted - automatic correction
Servo Motors
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Servo Motor selected from listOn programming block, pulse width and output pin must be set.Option for speed control in seconds Pulse width can also be expressed as a variable
Servo Motor Operation
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Pulse Width
•Pulse Width Modulation (0.75ms to 2.25ms)• Pulse Width takes servo from 0° to 150° rotation• Continuous stream every 20ms
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Genie E18 Motorboard
Servo Outputs• Motor board offers three servo outputs•Outputs must be linked directly to PIC and not from transistor chip•Designated outputs – Q0, Q1, Q2
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Genie E18 Motorboard
Analogue Inputs•Inputs that have varying resistance•Three designated analogue inputs- A0, A1, A2•Genie uses the variance and assigns values from 0-255