Quote:
Originally Posted by GaryVoshol
Maybe it's just the way the drawing looks to me. But are your wheels OUTSIDE your frame?
If so you've got a far bigger problem, because now your wheels form your FRAME PERIMETER, and the BUMPERS have to be attached to them.
If that's not the case, and your wheels are set back inside, then you may not need to change anything. You don't need a BUMPER along the whole side of your ROBOT. You only need at least 6 inches from each corner. If you're willing to leave the center wheel exposed, you don't need to have a BUMPER there at all.
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This has been something literally hundreds of robots have done every season since 2010, and is completely legal. This is probably the most common style of drivetrain in FRC apart from the kitbot. Having cantilevered wheels does NOT require your bumpers be attached directly to the wheels. The rectangle tubing members on either side of the wheels are intended to be the frame support. They stick out farther than the wheels do.
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OP: The sideways configuration you showed is totally fine. Basically the bumpers have to touch a frame member every 8 inches. It doesn't matter how MUCH of the frame they are touching - they can touch just a 1" tall section like the sideways tubes show. It's no problem. As long as the "gap" between each tube is less than 8 inches it's fine.