Our Seattle friends will be pleased to note the return of the hockey sticks for 2010.
In the off season we’ll be removing the hockey sticks and taking these things home to use for a coffee table that can actually deliver drinks for you. Or maybe a footrest that comes when it is called.
More seriously, however, 8wd, the two middle axles are 6"x1.5" IFI Traction wheels using roughtop tread, and the front and rear axles are 6" 2007/2008 AM kitbot wheels raised 1/4". The 14.88:1 toughbox (2 CIMs/side) is a direct drive to the third axle. No problem with the bump, and handling and accelleration like nothing we’ve ever built… including a mecanum drive. This thing might not have the top end speed of some robots, but it can come to a full stop, turn 90 degrees, and get back up to full speed faster than our mecanum robot could go from full forward to full sideways. 8wd has suddenly become my new favorite drive train. We’re going to do some pushing tests with the practice bot later on… but don’t plan to make defense a big part of our game. It’s more fun to score goals. (Just wish our Olympic men’s team had scored a couple more Sunday night…)
The entire robot is basically built out of one 5’x5’ sheet of 3/8" baltic birch plywood… and only a few of the parts were cut on our CNC router this year. The bed just isn’t big enough to do the sides, so this is largely hand-built.
The hockey sticks will support the robot signal light, camera, and perhaps a ball deflection mechanism… but probably not the flags as they could blow outside our volume limits. They also will prevent the robot from flipping on its top, and with our CoG as low as it is, the robot is self righting from (just about) any position it can be tipped or tilted to.
There are more details (including the mysterious lack of ball magnet and kicker) in the “witholding limit” photo.
See you in Seattle!