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Unread 09-01-2013, 16:48
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Tristan Lall Tristan Lall is offline
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FRC #0188 (Woburn Robotics)
 
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Re: Robot frame/bumper question

Quote:
Originally Posted by Al Skierkiewicz View Post
Tristan et al,
I am restating the 2012 interpretation of what defines the opening. If you use the string method then the indent is not on nor does it define the Frame Perimeter. Therefore the indent is not an exterior corner. As Bill Miller explained last year, should a team add something to the indent that is made the same as a bumper, it will not be a bumper and we were not to inspect anything that covered that area. By definition in 2012, only bumpers on the Frame Perimeter are in fact "bumpers". The GDC is the final response in the matter and they of course can change the interpretation for this year. This question needs to be asked in the Q&A.
So, if you took a rectangular frame, but put a birdsmouth cut at each of the four vertices, there would be no exterior corners, and thus no corner protection requirement? I don't recall an official ruling to that effect.

I've always interpreted "exterior corner" (and "exterior vertex") to mean any vertex on the frame perimeter.1 The vertex defines it, not the adjacent legs of the frame perimeter (if any).

1 Or, in years where the frame perimeter is not a projection onto a 2-D plane, any vertex on the convex hull of the projection of the frame perimeter onto a horizontal plane.