The perfect gearbox

[Tim Delles]

Originally Posted by sanddrag

If you were designing the perfect (or as close as possible) gearbox (for FRC robot drive system) what features would it have? Here's some basic points but feel free to add more

Selectable ratios Y/N and how many?
What motors input and how many?
What speed (rpm) output?
Size
Weight
Mounting
Output

And just for fun, if you had to buy all the parts and materials to build this perfect gearbox, how much would you spend on it?

So basically it would be a 2 speed shift on the fly transmission. The motors powering it would of course be the 2 Chips (and possibly the minibike). The arrangment would be that of a triangle, with the 2 chips at the bottom and the minibike at the top.

The gearbox would be geared for 11ft/sec (633.75 rpms using 4 inch wheels) high, and 5 ft/sec (297.99 using 4 inch wheels) low.

I would give around 8 pounds for each of the transmissions, but then again it is like the most important part of the robot, so if it needs to be a little heavier she can be.

Assuming that we are given the same chassis as we have been given for the past 2 years it would sit down within the chasis, with 2 output sprockets running to each end of the drive train.