Quote:
Originally Posted by EricH
When running front-back, all 4 wheels are contributing "full power" in one direction. When running side-side, all 4 are contributing "full power" in another direction, but two of them have to work against the other two to do it.
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The left and right wheels are working "against" each other when running front-back, just as much as the front and back wheels are working "against" each other when running side-side.
The issue making the two directions act differently in the real world is the friction of the rollers. It helps in the forward direction, and hurts in the sideways direction. If you use sensors to maintain the same wheel speed, your front-back speed will be the same as your left-right speed. With non-frictionless rollers, though, you have to apply more power to maintain that speed when traveling sideways.