[asid61]

Originally Posted by coachgallina

has anyone attempted to use the vexpro single reduction clamping gear box? could you get away with this set up. http://www.vexrobotics.com/vexpro/mo.../217-4156.html
11:72 set up? with 8" wheels

11:72 with 6" wheels is a free speed of 21fps. Way, way too fast. Don't even try 8" wheels there.
11:84 with 6" wheels is good, but if you want to use the clamping gearbox you'll need two stages of reduction. Going 12:72, and then 16:22 via some sprockets to a versablock will net a free speed of 16.8fps, perfect for a 4-cim drivetrain. I don't know how mecanums will affect efficiency or handling at that speed though. You can go to 11:72 for the first stage to back down to 15.3fps if you want.