[apalrd]

"simple"?
2 mechanisms (conveyor and shooter).
This is about as complex as is possible for an OCCRA robot. Some teams have 3 mechanisms. Anything more is too difficult to build (both build period and build in weight).

Most teams have a 4 wheel drive or 2 wheel with casters. A few have 6. Most teams don't have many powered mechanisms (we have 4 victors and 1 spike for our whole robot), but build something simple, practice, and go out and do what they do well.
All of the top robots (as of now) have a conveyor and a high-speed roller/wheel. Some collect and shoot on the same "front", some (like 573) collect on the "front" and shoot on the "other front".


We don't have quite as much raw power as we do in FIRST. We have 3 CIM motors and Toughboxes (Most teams use these to drive, and use the third CIM to shoot), plus two DeWalt drill motors (really useful, 3-speed, and they can have anti-backdrive pins if you leave them in). Most use these for conveyors or arms. A few drive with them. The rest are all small (under 60w) - Globe, seat, powered liftgate, wiper motors. In past years, we have had only 3 drill motors and no CIM's, so we are gradually getting more power.

We are also required to use 35 pitch chain only (no 25) because of the lack of precision in OCCRA robots, cannot weld, and cannot "precision-machine" (using a lathe, mill, or CNC machine). Most parts are made on a drill press and bandsaw.