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Mechanical Designs and Motors

Mechanical Designs and Motors. Arena. Aspects of Robotics. Actuators. An  actuator  is a type of motor for moving or controlling a mechanism or system. It is operated by a source of energy. Types of actuators: Electric motors DC motor, Servos, Stepper, Encoder Pneumatics

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Mechanical Designs and Motors

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  1. Mechanical Designs and Motors

  2. Arena

  3. Aspects of Robotics

  4. Actuators An actuator is a type of motor for moving or controlling a mechanism or system. It is operated by a source of energy. Types of actuators: • Electric motors • DC motor, • Servos, • Stepper, • Encoder • Pneumatics • Hydraulics

  5. DC Motors • These are simple motors used for simple purpose. • Speed can be reduced by reducing the voltage supplied, however that’s not an efficient way of doing things. • Torque and speed are inversely proportional. Generally a 100rpm – 300rpm motor is used as the wheels of a robot . • Never apply voltage more than applied voltage. • Rated voltage is generally 6V, 12V or 24 V

  6. Mechanisms Rigid bodies connected by joints in order to accomplish a desired force and/or motion transmission constitute a mechanism. • Gripping mechanism, • Hands of a robot is referred to gripper. • Lifting mechanism • Will be used to lift the gripper.

  7. Motion Transfer mechanisms • Rotation to linear motion • Rack and pinion • Power screw • Conveyer belt • Rotation to rotation motion • Gears(spur, bevel, worm etc.)

  8. Power screw Rack and pinion Conveyer belt

  9. Spur gear Bevel gear Worm gear

  10. Types of Grippers • 4-Bar mechanism: • Ends stay Parallel. • Good • Universal

  11. Roller gripper: • Slow, • Simple, • Misalignment problem

  12. Power screw gripper • Slow • Self Locking.

  13. Lifting mechanisms • Pulleys • Sliders • 4-Bar linkage mechanism • Scissor mechanism

  14. Pulley lifting mechanism

  15. Sliders • They move linear • Combine pulley and sliders for lifting

  16. 4-Bar linkage • Parallelogram mechanism. • Object moves parallel.

  17. Scissor mechanism

  18. Wheels Wheels for plastic shaft motor Omni wheel ATV wheel Mecannum wheel

  19. Switches

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