LEGO 5981 LuuMa EV3 Manual del usuario - Página 3

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4. Hungry Alligator Teacher Notes

Construct

Build the model following step-by-step instructions or create your own alligator. If you create your

own, you may need to change the example program.

To operate the alligator best, make sure the jaw opens and closes easily. To do that, loosen the

pulleys and bushings to reduce friction. If the belts have been used a lot, wipe them clean to

improve performance.

The energy transfers from the computer powering the motor, to the crown gear at a 90° angle to

the next gear. That gear turns a small pulley and a belt that are on the same axle as the gear. The

belt connects the small pulley to the large pulley. Moving the large pulley opens and closes the

alligator's jaw.

The energy changes from electrical (the computer and motor) to mechanical (physical movement

of the gears, belts and the jaw mechanism).