pic: Fisher Price gearbox

[MrForbes]

We have a several of the old white first stage gears, so we decided to make a new gearbox for the 2012 robot. It is integrated with the shooter, the lexan panel it is mounted to will be the side panel of the shooter. We do need to make a new shaft, since the one shown here was fabricated in a prior year. The lexan plate that holds the motor and the hidden bearing was made tonight by students, using a 7/8" Forstner drill bit, and a small drill press. We just measured the gear spacing using a vernier caliper, laid it out carefully and drilled it. The motor is not really at tight fit in the hole, but it's good enough. If you have a way to ream or bore the hole to the proper size, that would be better. Note that this is the 2011 motor with it's 19 tooth pinion gear, not the 2012 motor.

The shooter wheel will be mounted on AM hubs, keyed to a 1/2" shaft, which will be bored to fit over the new transmission output shaft. We will probably use a roll pin or two to hold the shafts together.