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Mechanisms (Gears (Idler gear (Used to fill in gaps between driver and…
Mechanisms
Gears
Idler gear
Used to fill in gaps between driver and driven gears
Used to change direction of rotation
Ratchet and pawl
Only rotates in one direction
Worm and worm wheel
Very slow
High torque
Chain and sprocket
Rotates in same direction
Strong
Rack and pinion
Rotation in linear motion
Bevel gear
Rotates through 45 degrees
Compound gear train
Gear sizes determine speed
Spur gear
Different sizes
Pulleys
Stepped pulley
Changes speed
Reverse pulley
Change direction using the belt
Idler pulley
Allows for tension on pulley belt
Regular pulley system
Pulleys rotate in same direction
Cam and followers
Many shapes
Shape determines movement of follower
Converts rotational motion to linear motion
Straight line movement
Follower shape determines accuracy
Speakers
Buzzer
One sound
Piezo
Ideal for single tones
Micro speaker
Plays tunes
Linkages
Parallel linkage
Transfer motion from one point to another