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IndySam 07-01-2012 17:23

Bumper question
 
4.1.6 Bumper Rules
Robots are required to use Bumpers to protect all exterior vertices of the Frame Perimeter. For adequate protection, at least 8 in. of Bumper must be placed on each side of each exterior vertex(see Figure 4‑1, Figure 4‑2, and Figure 4‑3).


OK this is a very important rule as far as robot design is concerned. I hate waiting for answers from the GDC for things like this because it is so important.

While we wait for Q&A to open what are peoples opinion on the 8 in. of Bumper must be placed on each side of each exterior vertex thing?

Will that include the 2.5" beyond the corner or is it from the corner? this makes a 5" difference in possible bumper openings for ball pickup. Opinions?

DMetalKong 07-01-2012 17:26

Re: Bumper question
 
In my interpretation, the "bumper" is the part that has a hard backing, therefore the 8" required is 8" along the frame perimeter, and does not include the protrusion by any fluffy parts at the corner.

IndySam 07-01-2012 17:42

Re: Bumper question
 
Thanks David, I tend to agree with you.

The vertex is the corner (if I remember my geometry that I took many years ago) so each side of corner would mean 8" from the corner not boned it.

I think this is going to possibly screw up a lot of teams like the similar rule did in Lunacy.

the man 07-01-2012 20:38

Re: Bumper question
 
I believe their were some diagrams in the manual. Unless you pose a different question. Would you mind maybe drawing a quick pic?

plnyyanks 07-01-2012 20:54

Re: Bumper question
 
Quote:

Originally Posted by the man (Post 1098560)
I believe their were some diagrams in the manual. Unless you pose a different question. Would you mind maybe drawing a quick pic?

Look here for the pictures you're thinking of

akoscielski3 07-01-2012 21:02

Re: Bumper question
 
So we can split the 8 in up right? so 4 in on the right and 4 on the left. (this would be for one Side of the robot)

KevinGoneNuts 07-01-2012 21:14

Re: Bumper question
 
1 Attachment(s)
While I have you all here. I also have a bumper question. Attached is a picture of a bumper idea, after reading the rules it seems that this is alright? I want to be 100% sure. Does it seem okay to you?


Attachment 11290

plnyyanks 07-01-2012 21:17

Re: Bumper question
 
Quote:

Originally Posted by KevinGoneNuts (Post 1098641)
While I have you all here. I also have a bumper question. Attached is a picture of a bumper idea, after reading the rules it seems that this is alright? I want to be 100% sure. Does it seem okay to you?


Attachment 11290

Looks okay to me.

Quote:

Originally Posted by R27
are required to use Bumpers to protect all exterior vertices of the Frame Perimeter. For adequate protection, at least 8 in. of Bumper must be placed on each side of each exterior vertex (see Figure 4‑1, Figure 4‑2, and Figure 4‑3).

Since all your exterior vertices and the required 8 inch covering are protected, it looks legal to me.

KevinGoneNuts 07-01-2012 21:21

Re: Bumper question
 
Quote:

Originally Posted by plnyyanks (Post 1098645)
Looks okay to me.

Do you know how far it can go into the frame perimeter?

plnyyanks 07-01-2012 21:25

Re: Bumper question
 
Quote:

Originally Posted by KevinGoneNuts (Post 1098654)
Do you know how far it can go into the frame perimeter?

How far that little inlet can go into your frame? I can't find anything in the bumper rules that specifies that...

JohnBoucher 07-01-2012 21:26

Re: Bumper question
 
Quote:

Each set of Bumpers (including any fasteners and/or structures that attach them to the Robot) must weigh no more than 20 lbs
Was it not 15 lbs last year?

KevinGoneNuts 07-01-2012 21:27

Re: Bumper question
 
Quote:

Originally Posted by plnyyanks (Post 1098663)
How far that little inlet can go into your frame? I can't find anything in the bumper rules that specifies that...

Thank you! Should I bother the GDC about it or should I just leave it? haha

Joe Ross 07-01-2012 23:48

Re: Bumper question
 
Quote:

Originally Posted by JohnBoucher (Post 1098666)
Was it not 15 lbs last year?

Bumpers were last 15 lbs in 2008. They were 18 lbs in 2009, and 20lbs since.

Jon Stratis 08-01-2012 00:57

Re: Bumper question
 
Quote:

Originally Posted by akoscielski3 (Post 1098616)
So we can split the 8 in up right? so 4 in on the right and 4 on the left. (this would be for one Side of the robot)

No. See section 4.1.6:
Quote:

Robots are required to use Bumpers to protect all exterior vertices of the Frame Perimeter. For adequate
protection, at least 8 in. of Bumper must be placed on each side of each exterior vertex
Emphasis mine. So, if you have a gap between bumper segments (along a straight portion of your FRAME PERIMETER), you'll have (at minimum) 8 in of bumpers on each side.

slijin 08-01-2012 01:43

Re: Bumper question
 
Quote:

Originally Posted by plnyyanks (Post 1098663)
How far that little inlet can go into your frame? I can't find anything in the bumper rules that specifies that...

You're looking for [R33]; if the width of the gap >= 8", then it can only go 1/4" in; otherwise, there seems to be no apparent limit other than your bot itself.


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