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Although you can drive the wheels of your robot directly from the motors, this is not recommended.

Gears allow you to adjust the speed and power (also known as [torque]) of your robot's wheels.

The gear ratio is the ratio between the number of teeth on two gears.

If you ride a multi-speed bicycle, you will be familiar with gears. Without gears, your legs would need to go around at the same speed as the wheels of the bicycle. With gears, when you go up hills (and want maximum torque), you use a low gear, where the size of the gear on the motor (ie the pedals) is similar to the size of the gear on the wheel. On the other hand, on a flat surface, or going down hill, you use a higher gear, where the gear on the wheel is smaller than the gear on the motor.

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This page was last modified on 18 February 2007, at 21:10.
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