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Unread 15-10-2013, 21:25
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FTC Mentor - The Robot Corps 7491
FRC #3928 (Team Neutrino)
Team Role: Alumni
 
Join Date: Oct 2012
Rookie Year: 2006
Location: Nevada, Iowa
Posts: 397
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Re: Show off your machining!

Quote:
Originally Posted by BurkeHalderman View Post
We never did any official impact testing with it or stress analysis on the CAD file but i can say it's strong enough to withstand being sandwiched between two bots (that was our unofficial test, for fun ) without bending at all. Weight is the biggest advantage to using a uni-body chassis though, as pictured it weighed 7lbs compared to our 2013 robot's frame at 20lbs, which was made from C-channel and extruded aluminum. We've since ditched the uni-body chassis concept as we found it to limiting, but it's still a pretty piece to display.
We had an issue with being under weight with our bot & added like 9 or 10 pounds of steel to our bumpers (and we were still under weight)

Anyway, I would say our chassis last year took a lot of skill... Plus it's so holy, it could be a priest (sorry, couldn't resist the pun). Luckily, our 2 side chambers (that held our drive trains) that had the most holes, I tossed into our CAM model that we ran. Each face actually took 2 passes (one for the left & one for the right) as our CNC mounting base wasn't large enough. The other cross bars we drilled on our XY CNC Bridgeport.
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David Runneals
FRC 3928 Team Neutrino 4-H: Mentor (2015 Off-Season - ?)
FTC North Super Regional Championship: Game Announcer (2015)
FTC 7491 The Robot Corps 4-H: Mentor (2013 - ?)
FRC 2167 Mentor (2014)
FRC 3928 Team Neutrino 4-H: Member, Co-Captain, & Media Coordinator (2013)