Quote:
Originally Posted by thefro526
816 is using an 8WD with 6" wheels on approximately 10" wheelbases with the center 4 wheels dropped 3/16" in a long base configuration.
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We're doing one very similar, we spread the middle two wheels on each side to 12" centers, the end wheels are close together, and not as much drop. Initial tests rolling over the bump (pushing the robot from the center, and pushing down relative to Earth with some load to simulate the weight of the rest of the robot) look good.
8wd is not much different to build than 6wd, you mostly just need to buy two more wheels, bearings, sprockets, and axles.
We should have it driving in a few days.
Neat thing about 8wd vs 4wd is that it allows a lower center of gravity, which can make the robot less tippable, but it also allows the center of the robot to kind of roll over the bump. The 6wd does not naturally roll over a bump...it shoots way up in the air, then crashes down.