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Unread 25-02-2013, 15:14
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PayneTrain PayneTrain is offline
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Re: Drivetrains in Ultimate Ascent

We'll see if the build lead for 422 comes out of the woodwork for this discussion, but I'll give you the spiel that you'll probably hear if you stop by the pit:

The drive train is quite the venture for 422, being the first non direct kit or kit-modified drive train system in years. There are a lot of things that were learned ("Hey, maybe we should be a little more gentle when welding" or "Hey, maybe our bearing blocks shouldn't be 1/12 of the robot weight") It's a 6WD "West Coast Inspired" drive system with 6-inch AndyMark performance Wheels lovingly covered in Blue Nitrile, feeding into a full VEXpro system of sprocket, chain, the single reduction gearbox, and 2 CIMs and 1 mini CIM on each side.

The numbers you're probably looking for:
15.17 fps, operating at 90% system efficiency on a total gear reduction of 8.25:1, creating what he calls a "friction limited system," a term I can't remember because I haven't slept in 30 hours. I think the idea is that as long as 422 initiates the contact, the other team is probably in for a bad time.

Now obviously a 6 motor drive train is not a battery's best friend (our new battery chargers are!), but 422 can rev up their shooter while driving (taking shots while moving isn't an ideal situation strategically or mechanically). I imagine the team will learn a lot this year, as they already have in building it. The drive team is just itching for Week 3 to come so they can pull it out of the bag and drive it around some more.

I didn't put a hand on a tool for this, that's just the readout they gave me to make the video.
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