Living with the Lab Learning Objectives • Be able to identify characteristics that distinguish a servo and a DC motor • Be able to describe the difference a conventional servo and a continuous rotation servo • Be able to use the Arduino Servo library to control servo position Living with the Lab References Information on Arduino Servo library: http://www.arduino.cc/en/Reference/Servo http://www.arduino.cc/playground/Learning/SingleServoExample Additional descriptions of servos http://makeprojects.com/Wiki/Servos http://www.seattlerobotics.org/guide/servos.html Living with the Lab What is ...
PWM(Pulse Width Modulation)? Modulation technique used to encode a message into a pulsing signal. Control of the power supplied to electrical devices, especially to inertial loads such as motors. https://en.wikipedia.org/wiki/Pulse-width_modulation 2 PWM + Servo Motor(SG90) 0 45 90 http://www.piccircuit.com/shop/picture/motor/servo_operation.png 3 Wiring RPi GPIO18 - PWM RPi 5V - Vcc RPi GND - Ground 4 import RPi.GPIO as GPIO import time Python code import sys GPIO.setwarnings(False) $ python3 servo.py 1 GPIO.setmode(GPIO.BCM) ...
Three Types (for us) • Servo motor – PWM sets position, used for R/C planes, cars, etc. – 180° range limit, typically – 5 V supply • Stepper motor – For precise angular control or speed control – Can rotate indefinitely – Lots of holding torque • DC motor – simplest technology; give up on precise control – good when you just need something to SPIN! Phys 124: Lecture 3 2 When any old PWM won’t do • The ...
Actuators Hardware devices that convert a controller command signal into a change in a physical parameter The change is usually mechanical (e.g., position or velocity) An actuator is also a transducer because it changes one type of physical quantity into some alternative form An actuator is usually activated by a low-level command signal, so an amplifier may be required to provide sufficient power to drive the actuator Actuators Mechanism Logical Mechanism Signal Signal Processing Signal Processing Electric Hydraulic Electric ...
The Purpose of this notebook is to: • Show what types of motors are available • Identify design parameters to consider when selecting a motor • Give brief descriptions of how these motors work and when they are used • List manufacturers and sources to find more information World of Motors Pneumatic Motors Electric Motors Hydraulic Motors Servo Motors DC Motors AC Motors Stepper Brush DC Universal Single Phase Brushless DC Poly-Phase (3 phase) Linear MOTOR SIZING DESIGN CONSIDERATIONS Certain ...
Precision Linear Motorized Stages Long travel (~2m) High precision (~nm level) Stepper drives Parker Motion products September 11, 2022 OPTI 521 Tutorial Presentation 2 Outline Motion Control Parker Motion System what, where and why? Linear sliders and stages System Components 6K controller stage (long range) Computer & monitor motor (servo vs stepper) Null test system controller Conclusions computer/software Examples vendors specifications cost September 11, 2022 OPTI 521 Tutorial Presentation 3 Motion Control Precise positioning of optics and mechanics Used ...
PPT - Power Point | 2.67 MB | Free Download
