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Gears and Speed/Power

Learn how the gear ratio affects the speed and power of your robot. Discover how to calculate gear ratios and modify gears for optimal performance.

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Gears and Speed/Power

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  1. Gears and Speed/Power

  2. START FINISH Speed is the rate of movement of an object. In other words speed can be how FAST or SLOW your robot is moving.

  3. The Driving Gear is connected to the motor The Driven Gear is connected to the wheel The driving gear is connected to the motor and is responsible for spinning the driven gear, which is connected to the wheel.

  4. To make the robot move faster, make the driving gear bigger and the driven gear smaller. Do the opposite for more power or torque. The relationship between the sizes of your driving gear and driven gear is called the “Gear Ratio.”

  5. To turn the 40-tooth gear one entire revolutionan 8-tooth gear needs to turn five times to “push” the 40-tooth big gear once. 5 x 8 = 40

  6. Driving Gear 8 Teeth Driven Gear 40 Teeth You can calculate Gear Ratio by dividing the number of teeth on the Driven Gear by the number of teeth on the Driving Gear. # teeth on Driven Gear Gear Ratio = # teeth on Driving Gear

  7. Gear Ratio = Driving axle turns = 5 Driven axle turns = 1 = 5 Driving Gear 8 Teeth Gear Ratio = # of Driven Teeth = 40 # of Driving Teeth = 8 = 5 40 Teeth Driven Gear Write a Gear Ratio like this: 40:8 or 5:1

  8. The Taskbot’s wheels are directly attached to its motors. Remove one wheel and Add the gear modification bar in your kit to the robot. Run a simple Motor CB forward program and compare the speeds of the two wheels. Does the modified wheel have more power/torque or speed?

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