Sunday, December 7, 2014

Gearing down WeDo motor controlled car to run slower

This previous Lego car driven by gears and motor (see photo) perhaps is a bit too fast and would quickly move till the maximum allowed by the length permitted by the wire.

The first model we have the 24 teeth crown gear with the 24 teeth spur gear. To slow down the speed, we need to gear down connecting the 8 teeth spur gear to the 24 teeth spur gear. Here is a photo of the geared down car model. You can see how to remake the car model by looking at this photo. See details of the down gearing here.

To make the car runs even slower, we do a further down gearing. Look at this photo to see how. For a closer look at the downgearing look at the details here.

Photos

first car model

Add bricks to raise level
Step 5: Add bricks to raise level


24 teeth crown gear

. For closer look at the down gearing, look at this photo.
24 teeth crown gear
24 teeth crown gear

spur gear

24 teeth spur gear
24 teeth spur gear

8 teeth spur gear

9 teeth spur gear
9 teeth spur gear

second car model geared down to run slower


Down gearing details

details of the down gearing
details of the down gearing

Car made to run even slower by further down gearing


Further down gearing details

Further down gearing details
Further down gearing details

Related:
Gear tutorial
More info on gearing down
More details on gearing up

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