My stay in Georgia was only going to be a week, so I knew that I had to come up with a simple and robust design since I wouldn't have any time to do any fancy machining or even time to properly debug and battle test my bot. I whipped together a wedge in solidworks:
|...not far from the robot's actual geometry|
The design consists of two motors attached to gearboxes that are wrapped in a steel cage, and a top steel sheet that has two bends in it. The wedges in the initial design are symmetric. The design is about 3.1 pounds, which is slightly over the 3 lb weight limit of the 'beetle' category I am going to compete in. The design is strong, stiff, and most importantly, very easy to manufacture on a waterjet, a cool little machine that the guys at GT have.
So, anyway, here's the product of about four days of almost nonstop design and fabrication work:
|I christen thee "Critical Space Item." May you rip other robots to shreds and achieve great victory... The dings are some battle testing from facing the bot off against a 12 lb robot...|
|GT seems to have an unhealthy fascination with yellowjackets...|
The competition is tomorrow. I hope my bot doesn't get totally destroyed because I'd like to use it as a Roomba back in the office...