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-   -   <R07>E Bumper clarification (http://www.chiefdelphi.com/forums/showthread.php?t=82358)

Vikesrock 11-02-2010 01:08
Re: <R07>E Bumper clarification
 
Quote:
Originally Posted by Chris is me (Post 917764)
Yeah, why would they specify the exposed bumper material if they meant all of it? I can't see how the word "exposed" means "all of the plywood". The figure supports my conclusion. Bump on!
Bumper backing can be exposed, but facing towards the robot. Does this need to be covered?

My definition of exposed would be if the plywood is visible when the bumpers are installed on the robot. Our current bumpers have quite a but of exposed plywood on the side facing our robot. They are supported in the back by a piece of 1" tall plywood attached to a piece of 1x1 aluminum box. The brackets holding the bumpers in place are fairly small and the fabric currently only wraps around about 1-1.5" around each edge leaving between .5" and 1" of backing I would consider exposed on either side of the supporting frame member.

I agree with your conclusion, but am not fond of taking risks when it comes to inspection. Safer to ask the question and find out the answer now.

Alan Anderson 11-02-2010 11:11
Re: <R07>E Bumper clarification
 
Quote:
Originally Posted by Steve W (Post 917658)
R7 ...
E. The BUMPERS must be covered with a rugged, smooth cloth (1000 dernier Cordura PlusŪ strongly recommended). The cloth must completely enclose the BUMPER backing (plywood) and cushion (pool noodle) material. It is recommended that lengths of aluminum angle be used to clamp the fabric in place

This is taken from the rules, red highlight is mine. To say that the cloth does not have to cover the back is NOT what is stated in the rules. Please read the rules before making statements.
Steve, please read the current revision of the rules. Revision H of The Robot replaces what you highlighted in red with The cloth must completely enclose all exposed surfaces of the BUMPER backing (plywood) and cushion (pool noodle) material. (Italics are mine.) That's what the original post quoted, and the interpretation of "exposed surfaces" is the question.

I don't think the part of the bumper that is against the robot frame is "exposed", but I'm neither the GDC nor a robot inspector.

Boydean 11-02-2010 11:23
Re: <R07>E Bumper clarification
 
I really believe they mean that the back of the BUMPER needs to be covered with fabric. If you look at the rule and shift your eyes over to "enclose the BUMPER backing (plywood)" I think this very clearly stated that the back of the BUMPER(part attached to the FRAME) must be covered.

This is how our team views is, this is how we made it. If you look at it from a safety point of view; having the back covered helps prevent splinters when dealing with the BUMPER.

EricH 11-02-2010 13:46
Re: <R07>E Bumper clarification
 
Quote:
Originally Posted by Boydean (Post 917919)
I really believe they mean that the back of the BUMPER needs to be covered with fabric. If you look at the rule and shift your eyes over to "enclose the BUMPER backing (plywood)" I think this very clearly stated that the back of the BUMPER(part attached to the FRAME) must be covered.

This is how our team views is, this is how we made it. If you look at it from a safety point of view; having the back covered helps prevent splinters when dealing with the BUMPER.
You guys need to keep up on the updates. See Alan's post right above yours.

That said, any team that opts to cover the back will not be declared illegal.

EricH 12-02-2010 17:40
Re: <R07>E Bumper clarification
 
Steve, don't try to fail a team who doesn't have the backside of their bumpers covered. http://forums.usfirst.org/showthread.php?t=14610

Quote:
Originally Posted by GDC
Please refer to Rule <R07-A> as amended in Team Update #3. The rule requires that all exposed surfaces of the plywood and pool noodles be covered by the fabric. Interior or hidden surfaces (e.g. the "back" of the plywood) do not have to be completely covered.

Steve W 12-02-2010 23:45
Re: <R07>E Bumper clarification
 
After reading the update number three I will say that the GDC means that anything that can be seen from the audience should be covered. I take this to mean that the backing now does not need to be covered.

Note to self: stop building and read updates faster.


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