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Mario_AC

New Mars Rover using the new tool OOML!!

by Mario_AC Sep 1, 2012
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How is the wheel arrangement meant to work? As I see it, it is only a 4 wheel car, with two additional wheels, where the two extra wheels are not doing much.

Hi!

Thanks for your comment.

At first we thought about developing a two wheels design, one of these of caterpillar type (something like this: http://www.thingiverse.com/thing:8559);http://www.thingiverse.com/thi... however, we wanted a prototype for steep terrains and wild reliefs, so we scrapped it. Thus, with a third wheel we don
’t look for more power but more adaptability. In my house this additional wheel isn’t necessary because adds nothing, like you say; but in other types of terrain a third wheel introduces a higher degree of stability.
I have uploaded a new image about a sketch of the movement.
The design is based
on three separate concentric shafts: the first wheel, the base and the other wheels. Thus, each wheel can be at different levels. Also, it uses a spring to compress the front wheel against the ground slightly, which improves adhesion.
I hope I have answered your question.

Caterpillator v1.1
by Olalla