pic: Spectrum Fall 2013 Drivetrain

[AllenGregoryIV]

Originally Posted by Ryan Dognaux

Any suggestions for easily doing this with the VexPro ball shifter? We've been looking at multiple gearbox options and the long output hex shaft that's sold only gives us 1.375 inches, which isn't a lot if you're trying to directly drive a wheel and a sprocket, or a gear.

The "long" output shaft is used in the 2 stage transmission to allow for a sprocket(s) or another gear to drive another one that actually powers the wheel. Direct driving off of only the two stages internal to the ball shifter would normally make for a robot that is geared for too high a top speed. If you download the CAD for the 3 stage shifter you can see that the output shaft is noticeably longer for use with direct driving wheels.