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Originally Posted by Billfred
Really? Last year 1293 ran a caster in the back, which made it a bona fide pain in the neck to drive forward. (Unique experience. Your robot may be more or less of a pain in the neck. Offer void inside and outside of the 48 contiguous states.) Of course, the pivoting concept makes good sense at the same time. I guess there's only one way to find out which way is the way to go.
Either way, it looks good! |
Generally speaking you want your drive wheels on the front and you want your center of gravity to be a lot closer to the drive wheels than the casters. We made the mistake of having the center of gravity in the center of the robot one year and everytime we made a sharp turn the robot would fishtail (I think we corrected by moving the battery mount a little further forward). The ball casters will make driving easier because you don't have to overcome the swivel bias that you have with the swivel casters. We used sliders last year to avoid this problem and I was suprised how well they worked.