Page 28 - Lego Mindstorms

Robot 1 • The Bug

Right Wheel Step 3
The 8t spur gear mates to the worm gear in
the motor mount, providing an 8:1 gear
reduction. Thus, the motor has to spin eight
revolutions for the wheel to rotate
just once. Gear reduction
increases the torque output
of the motor. The axle
attached to the wheel may
turn eight times slower than
the motor shaft, but it also
turns almost eight times stronger.

Right Wheel Step 4

Locate one of the motor mount
sub-assemblies that you built
earlier. Slide the motor mount
sub-assembly onto the axle, and
secure the mount onto the axle
with the two stop bushings.

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