Team 254 Presents: Dropshot Technical Binder 2016

[Cory]

Originally Posted by Michael Hill

Awesome robot as usual.

I've been curious about your turret gear. It looks similar to 1114's from 2012, but from my guesstimates, it's 20dp @ 16.1" Pitch Diameter whereas 1114 had a much larger geartooth (something like 10-12dp). One of my main concerns is actually having our waterjet sponsor cut teeth that small (I've been contemplating turrets lately). Was it relatively easy for your sponsor to do or was there anything special you had to do to the gear design to make it easier to manufacture? I'm guessing going to 0.125" aluminum made it easier, but is that enough?

Depends on the water jet nozzle diameter. Our sponsor can't do anything a .035" diameter stream can't fit into. That diameter stream will just get into the root of a 20 dp gear tooth. It would not work for our hood gears, had we attempted to water jet them.

There was really no special design consideration. This was done on a very new water jet with a tilting head to compensate for stream lag and eliminate taper, which basically cuts perfect parts.