Gears and Speed/Power

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

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.

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.”

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

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 8 Teeth 40 Teeth Driven Gear Driving Gear

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

The Taskbot’s wheels are directly attached to its motors 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?