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Mechanical Mechanisms (Gears (Idler gears (Used to change direction of…
Mechanical Mechanisms
Linkage
Parallel Linkage = Transfers motion from one point to another.
Pulleys
Reverse Pulley = Change direction using a belt
Regular Pulley System = Pulleys rotate in the same direction
Stepped Pulleys = Changes Speed
Idler Pulley = Allows for tension on pulley belt
Motors
Gearbox
Set Speeds
3v Motor
Ideal for fans
Small
Stepper
Expensive
Used in CNC
Servo
Rotates through 180 degrees
High torque
Inline
Ratio 120:1
Cheap
Rotates 360 degrees
Ideal for wheels
Speakers
Piezo = Used for single tones
Micro Speaker = Play tunes
Buzzer = One sound
Cam and Followers
Straight line movement
Converts rotational motion into linear motion
Follower shape determines accuracy
Shape determines movement of followers
Gears
Rack and Pinon = Rotation to linear motion
Bevel gear = Rotates through 45 degrees
Chain and sprocket = Rotates in same direction, Strong gear
Ratchet and Pawl = Only rotates in one direction
Spur gear = Difference sizes
Compound gear train = Gear size determines speed
Idler gears
Used to change direction of rotation
Used to fill space between driver and driven gears
Worm and Worm Wheel
Very Slow
High torque