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Originally Posted by Brandon Holley
ditch the turntable motor...add somesort of 'brake' or 'lock' to "lock" the turntable in 1 direction.
now just turn the right wheel forward and the left backward or vice versa and the turntable spins itself.
save yourself the weight and complexity of another motor.
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Great idea, i'll experiment with this when I make a prototype.
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You should be able to turn the chassis by tanking the two drive motors on the turntable... but that's in theory of course.
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That was the plan for turning.
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To echo what Sean said about high-siding the drive wheels - make sure the challenge does not require ramp-climbing of ANY kind. Even the shallowest of inclines will render your robot immobile. We experienced this challenge during this year's competition. I beg all teams to consider how to be most accomodating and complementary when designing a robot that interacts with another robot on your alliance - i.e. climbing ramps to score 15 or 30 points.
Another factor to consider with this design is when your robot gets into pushing matches - if your robot is lifted up even slightly on one end you will be at the mercy of your opponent.
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The redesign has a feature that should compensate for this. The turret looks something like this now.
The spring (if gravity isn't enough) will push the center platform down up to 3 inches when lifted off the ground by ramp or defensive robot The result will look like this:
