Go to Post Dave, you're going to have quite the motor pool on Mars. :D - skimoose [more]
Home
Go Back   Chief Delphi > Competition > Rules/Strategy
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
Closed Thread
Thread Tools Rate Thread Display Modes
  #1   Spotlight this post!  
Unread 26-01-2012, 17:08
wardawg's Avatar
wardawg wardawg is offline
Registered User
FRC #2961
 
Join Date: Jan 2012
Location: washington dc
Posts: 10
wardawg is an unknown quantity at this point
bumper design

we are trying to figure out the rules for the dimensions of the bumpers. does it have to be 8 inches of bumper or up to 8 inches. Our robot design has the ball rolling into the frame of the bot about 6 inches in. and we were worried we might not be able to do that if we need 16inches of bumper. help please!


|_________________________________________________ ______________|
Team 2961 Washington DC P. L. Dunbar SHS 4th year team
  #2   Spotlight this post!  
Unread 26-01-2012, 17:23
Matt C's Avatar
Matt C Matt C is offline
Registered User
FRC #1468 (J-Birds)
Team Role: Engineer
 
Join Date: Mar 2006
Rookie Year: 1999
Location: Islip Terrace, NY
Posts: 396
Matt C has a reputation beyond reputeMatt C has a reputation beyond reputeMatt C has a reputation beyond reputeMatt C has a reputation beyond reputeMatt C has a reputation beyond reputeMatt C has a reputation beyond reputeMatt C has a reputation beyond reputeMatt C has a reputation beyond reputeMatt C has a reputation beyond reputeMatt C has a reputation beyond reputeMatt C has a reputation beyond repute
Send a message via AIM to Matt C
Re: bumper design

Back to the drawing board.

Quote:
[R27]
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).
  #3   Spotlight this post!  
Unread 26-01-2012, 17:24
Jon Stratis's Avatar
Jon Stratis Jon Stratis is offline
Mentor, LRI, MN RPC
FRC #2177 (The Robettes)
Team Role: Mentor
 
Join Date: Feb 2007
Rookie Year: 2006
Location: Minnesota
Posts: 3,835
Jon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond repute
Re: bumper design

You need 8 inches (or more) of bumper on either side of each vertex. If you have a U robot with an opening in the front, you'll have 8 inches of bumper on each side of your front edge, and you need support on both ends - you can't just have 2 inches of bumper hanging into your opening with no support behind it.
  #4   Spotlight this post!  
Unread 26-01-2012, 18:19
eedoga's Avatar
eedoga eedoga is offline
Registered User
FRC #2980
 
Join Date: Jan 2011
Location: Oak Harbot
Posts: 232
eedoga has much to be proud ofeedoga has much to be proud ofeedoga has much to be proud ofeedoga has much to be proud ofeedoga has much to be proud ofeedoga has much to be proud ofeedoga has much to be proud ofeedoga has much to be proud of
Re: bumper design

Our interpretation is that there should be no less than 8 inches of bumper on each end of each side. so if you have your frame at 27 * 37 and the hole is on your 27 side, then the hole will be 11 inches wide. The ball is 8 inches wide which gives you a few inches on each side. If you have a wide frame then your hole can be 21 inches wide...

Hope this helps.
  #5   Spotlight this post!  
Unread 04-02-2012, 16:06
celenacrews's Avatar
celenacrews celenacrews is offline
Registered User
FRC #3556 (GET SMART)
Team Role: Coach
 
Join Date: Jan 2011
Rookie Year: 2011
Location: US
Posts: 5
celenacrews is an unknown quantity at this point
Re: bumper design

We are in a similar situation. We have a U with only 6 inches of frame to cover on each side of our robot. Have you found any further clarification anywhere? We are now concerned that our robot is out of compliance, however, I do not see any rule that says our frame has to have certain dimensions other than not being too long.
__________________
~Celena Crews
Coach of Team 3556 "GET SMART"
Gracious Professionalism 2011 Orlando Regional & 2016 South Florida Regional
Judges Award 2011 TnT
Finalists 2012 & 2016 Orlando Regional
  #6   Spotlight this post!  
Unread 04-02-2012, 16:26
thefro526's Avatar
thefro526 thefro526 is offline
Mentor for Hire.
AKA: Dustin Benedict
no team (EWCP, MAR, FRC 708)
Team Role: Mentor
 
Join Date: Aug 2006
Rookie Year: 2005
Location: New Jersey
Posts: 2,599
thefro526 has a reputation beyond reputethefro526 has a reputation beyond reputethefro526 has a reputation beyond reputethefro526 has a reputation beyond reputethefro526 has a reputation beyond reputethefro526 has a reputation beyond reputethefro526 has a reputation beyond reputethefro526 has a reputation beyond reputethefro526 has a reputation beyond reputethefro526 has a reputation beyond reputethefro526 has a reputation beyond repute
Send a message via AIM to thefro526 Send a message via MSN to thefro526
Re: bumper design

Emphasis is Mine.

Quote:
[R33]
Bumpers must be supported by the structure/frame of the Robot (i.e. each end of the Bumper must be rigidly attached to the Frame Perimeter, the gap between the backing material and the frame must not be greater than ¼ in. and no section of Bumper greater than 8 in. may be unsupported). See Figure 4‑7.
Seems to me that your bumper configuration would be illegal with 2" on either front bumper unsupported. An easy way around this would be to add a small piece of angle to the frame to make it two inches longer and attach to that.
__________________
-Dustin Benedict
2005-2012 - Student & Mentor FRC 816
2012-2014 - Technical Mentor, 2014 Drive Coach FRC 341
Current - Mentor FRC 2729, FRC 708
  #7   Spotlight this post!  
Unread 04-02-2012, 18:36
DonRotolo's Avatar
DonRotolo DonRotolo is offline
Back to humble
FRC #0832
Team Role: Mentor
 
Join Date: Jan 2005
Rookie Year: 2005
Location: Atlanta GA
Posts: 7,019
DonRotolo has a reputation beyond reputeDonRotolo has a reputation beyond reputeDonRotolo has a reputation beyond reputeDonRotolo has a reputation beyond reputeDonRotolo has a reputation beyond reputeDonRotolo has a reputation beyond reputeDonRotolo has a reputation beyond reputeDonRotolo has a reputation beyond reputeDonRotolo has a reputation beyond reputeDonRotolo has a reputation beyond reputeDonRotolo has a reputation beyond repute
Re: bumper design

Quote:
Originally Posted by celenacrews View Post
We are in a similar situation. We have a U with only 6 inches of frame to cover on each side of our robot. Have you found any further clarification anywhere? We are now concerned that our robot is out of compliance, however, I do not see any rule that says our frame has to have certain dimensions other than not being too long.
Let me be blunt: You robot is out of compliance. 6" is 2" short of the required 8".

If you look you will see the rules. Hint: [R27], [R33]. Oh, and don't ignore [R35]
__________________

I am N2IRZ - What's your callsign?
  #8   Spotlight this post!  
Unread 04-02-2012, 18:46
MrForbes's Avatar
MrForbes MrForbes is offline
Registered User
AKA: Jim
FRC #1726 (N.E.R.D.S.)
Team Role: Mentor
 
Join Date: Feb 2006
Rookie Year: 2006
Location: Sierra Vista AZ
Posts: 6,033
MrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond repute
Re: bumper design

But you might find that even with the bumper in the way, your robot will still be able to get balls that the bumper drives over....if the bumpers are up as high as they can be, and are covered with the suggested type of heavy cordura cloth.

So you might think about trying to make a wider "funnel" behind and below the bumper, to help you get the balls to where they need to go.
  #9   Spotlight this post!  
Unread 04-02-2012, 23:50
akoscielski3's Avatar
akoscielski3 akoscielski3 is offline
Mentor (1114), Alumni (772)
AKA: Aaron Koscielski
FRC #1114 (Simbotics)
Team Role: Mentor
 
Join Date: Jul 2010
Rookie Year: 2006
Location: LaSalle, Ontario, Canada
Posts: 1,066
akoscielski3 has a reputation beyond reputeakoscielski3 has a reputation beyond reputeakoscielski3 has a reputation beyond reputeakoscielski3 has a reputation beyond reputeakoscielski3 has a reputation beyond reputeakoscielski3 has a reputation beyond reputeakoscielski3 has a reputation beyond reputeakoscielski3 has a reputation beyond reputeakoscielski3 has a reputation beyond reputeakoscielski3 has a reputation beyond reputeakoscielski3 has a reputation beyond repute
Re: bumper design

Where was it in the rules that it says that both ends of the bumpers must be supported by the frame perimeter. I just need to know where this rule is, not really saying it doesnt exist.
Thanks
__________________
Hall of Fame Team 1114 Simbotics
2013-Present
Host of Simbot Solidworks Series
Team 772 Sabre Bytes
2010-2013

Dean's List Finalist 2013 Waterloo Regional
  #10   Spotlight this post!  
Unread 04-02-2012, 23:53
EricH's Avatar
EricH EricH is offline
New year, new team
FRC #1197 (Torbots)
Team Role: Engineer
 
Join Date: Jan 2005
Rookie Year: 2003
Location: SoCal
Posts: 19,825
EricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond repute
Re: bumper design

Quote:
Originally Posted by akoscielski3 View Post
Where was it in the rules that it says that both ends of the bumpers must be supported by the frame perimeter. I just need to know where this rule is, not really saying it doesnt exist.
Thanks
[R33]. Bumpers must be supported by the structure/frame of the Robot (i.e. each end of the Bumper must be rigidly attached to the Frame Perimeter, the gap between the backing material and the frame must not be greater than ¼ in. and no section of Bumper greater than 8 in. may be unsupported). See Figure 4?7.

This was added in Update #1, I think (either that or #2).
__________________
Past teams:
2003-2007: FRC0330 BeachBots
2008: FRC1135 Shmoebotics
2012: FRC4046 Schroedinger's Dragons

"Rockets are tricky..."--Elon Musk

  #11   Spotlight this post!  
Unread 04-02-2012, 23:54
Steven Donow Steven Donow is offline
Registered User
AKA: Scooby
no team
Team Role: College Student
 
Join Date: Apr 2010
Rookie Year: 2009
Location: Boston, MA
Posts: 1,335
Steven Donow has a reputation beyond reputeSteven Donow has a reputation beyond reputeSteven Donow has a reputation beyond reputeSteven Donow has a reputation beyond reputeSteven Donow has a reputation beyond reputeSteven Donow has a reputation beyond reputeSteven Donow has a reputation beyond reputeSteven Donow has a reputation beyond reputeSteven Donow has a reputation beyond reputeSteven Donow has a reputation beyond reputeSteven Donow has a reputation beyond repute
Re: bumper design

Quote:
Originally Posted by akoscielski3 View Post
Where was it in the rules that it says that both ends of the bumpers must be supported by the frame perimeter. I just need to know where this rule is, not really saying it doesnt exist.
Thanks
Rule <R33>, was added in in a Team Update (I forget which one)

Quote:
Bumpers must be supported by the structure/frame of the Robot (i.e. each end of the Bumper must be rigidly attached to the Frame Perimeter, the gap between the backing material and the frame must not be greater than ¼ in. and no section of Bumper greater than 8 in. may be unsupported). See Figure 4‑7.
Emphasis mine
Closed Thread


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 04:36.

The Chief Delphi Forums are sponsored by Innovation First International, Inc.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi