Go to Post Okay guys I am enabling the robot. Honestly I have know idea what it is going to do. SO MOVE!! - JulieB [more]
Home
Go Back   Chief Delphi > FIRST > General Forum
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
Reply
Thread Tools Rate Thread Display Modes
  #16   Spotlight this post!  
Unread 15-01-2006, 13:41
Nuttyman54's Avatar
Nuttyman54 Nuttyman54 is offline
Mentor, Tactician
AKA: Evan "Numbers" Morrison
FRC #5803 (Apex Robotics) and FRC #0971 (Spartan Robotics)
Team Role: Mentor
 
Join Date: Jan 2005
Rookie Year: 2005
Location: Seattle, WA/Mountain View, CA
Posts: 2,139
Nuttyman54 has a reputation beyond reputeNuttyman54 has a reputation beyond reputeNuttyman54 has a reputation beyond reputeNuttyman54 has a reputation beyond reputeNuttyman54 has a reputation beyond reputeNuttyman54 has a reputation beyond reputeNuttyman54 has a reputation beyond reputeNuttyman54 has a reputation beyond reputeNuttyman54 has a reputation beyond reputeNuttyman54 has a reputation beyond reputeNuttyman54 has a reputation beyond repute
Send a message via AIM to Nuttyman54
Re: bumpers, a problem?

Quote:
Originally Posted by robotoby35138
about the hover craft it would be almost impossible to steer. and when you are even bumped by another robot you would just start bouncing around the arena. you would not have the acceleration to stop you from bouncing around the arena
not very competitive, but REALLY REALLY FUN!!!
__________________
Reply With Quote
  #17   Spotlight this post!  
Unread 15-01-2006, 13:55
psycho7 psycho7 is offline
pyscho
AKA: (ex-freshman)
FRC #1831 (Screaming Eagles)
Team Role: Scout
 
Join Date: Oct 2003
Rookie Year: 2002
Location: Gilford, NH
Posts: 51
psycho7 is on a distinguished road
Send a message via AIM to psycho7
Re: bumpers, a problem?

Quote:
Originally Posted by Nuttyman54
yes you can (otherwise we'd need hovercraft robots), but any non-bumper material must be within the original 28"x38" footprint

or just steal some star wars repulsor lift coils
Reply With Quote
  #18   Spotlight this post!  
Unread 15-01-2006, 15:28
adam adam is offline
Registered User
FRC #1717 (DP Engineering)
 
Join Date: Jan 2006
Rookie Year: 2006
Location: Goleta
Posts: 8
adam is an unknown quantity at this point
Send a message via AIM to adam
Re: bumpers, a problem?

I'd say that a hovercraft above 5 feet could be legal.....I'm pretty sure that the rule is that you cannot exceed 5 feet while in a STABLE POSITION (flat on the ground?)
Reply With Quote
  #19   Spotlight this post!  
Unread 15-01-2006, 15:36
pez1959's Avatar
pez1959 pez1959 is offline
Cap'n Patty
AKA: Patrick
FRC #1959 (Aye Aye Robot)
 
Join Date: Jan 2006
Rookie Year: 2006
Location: Blythewood SC
Posts: 36
pez1959 is on a distinguished road
Send a message via AIM to pez1959 Send a message via MSN to pez1959 Send a message via Yahoo to pez1959
Re: bumpers, a problem?

Quote:
Originally Posted by adam
I'd say that a hovercraft above 5 feet could be legal.....I'm pretty sure that the rule is that you cannot exceed 5 feet while in a STABLE POSITION (flat on the ground?)
<R08> states "The robot may not exceed the 60-inch height restriction at any time during the match."

That is a direct quote from the manual
Reply With Quote
  #20   Spotlight this post!  
Unread 15-01-2006, 17:14
adam adam is offline
Registered User
FRC #1717 (DP Engineering)
 
Join Date: Jan 2006
Rookie Year: 2006
Location: Goleta
Posts: 8
adam is an unknown quantity at this point
Send a message via AIM to adam
Re: bumpers, a problem?

Quote:
Originally Posted by pez1959
<R08> states "The robot may not exceed the 60-inch height restriction at any time during the match."

That is a direct quote from the manual
hmmm, in that case i'm not sure what i was thinking of. I seem to remember some mention of the height requirement only applying to robots in a stable position (so if another robot tips you over, one of your corners raising above five feet won't count against you).
Reply With Quote
  #21   Spotlight this post!  
Unread 15-01-2006, 18:50
pez1959's Avatar
pez1959 pez1959 is offline
Cap'n Patty
AKA: Patrick
FRC #1959 (Aye Aye Robot)
 
Join Date: Jan 2006
Rookie Year: 2006
Location: Blythewood SC
Posts: 36
pez1959 is on a distinguished road
Send a message via AIM to pez1959 Send a message via MSN to pez1959 Send a message via Yahoo to pez1959
Re: bumpers, a problem?

Well, not to beat a dead horse, but I think if your robot is within the 60in cube during gameplay, unless you have a diagonal piece, tipping over would not put you outside of the limit. Lifting you up could, which is something you may want to look into if you're a tall robot and you're concerned of being lifted.


Hmm I assume the 60in is 60in from the ground? Ie...when you're on a ramp, its 60in from the top of the ramp instead of original playing field?
Reply With Quote
  #22   Spotlight this post!  
Unread 15-01-2006, 18:56
Arkorobotics's Avatar
Arkorobotics Arkorobotics is offline
Robots!
AKA: Ara Kourchians
FRC #0589 (FalkØn)
Team Role: Mentor
 
Join Date: Nov 2005
Rookie Year: 2004
Location: La Crescenta, CA
Posts: 417
Arkorobotics is a splendid one to beholdArkorobotics is a splendid one to beholdArkorobotics is a splendid one to beholdArkorobotics is a splendid one to beholdArkorobotics is a splendid one to beholdArkorobotics is a splendid one to beholdArkorobotics is a splendid one to behold
Send a message via AIM to Arkorobotics
Re: bumpers, a problem?

Call me dumb but what is the bumper "zone"?
__________________
2007 Rockwell Automation Innovation in Control Award winners (Southern California Regional)
Crescenta Valley High School Team 589
http://www.arkorobotics.com My Blag


3.141592653589793238462643383275902884197 <- Current memorization of Pi
Callsign: N6ARA
Reply With Quote
  #23   Spotlight this post!  
Unread 15-01-2006, 19:21
cleonavicius cleonavicius is offline
Registered User
AKA: Chris Leonavicius
FRC #0888
Team Role: Mechanical
 
Join Date: Jan 2006
Rookie Year: 2003
Location: West Friendship, MD
Posts: 8
cleonavicius is an unknown quantity at this point
Re: bumpers, a problem?

I'm kind of curious, if bumpers are 2.5" off the ground, will they clear when the bot is going up the ramp? (assuming standard 4 wheels)
Reply With Quote
  #24   Spotlight this post!  
Unread 15-01-2006, 19:41
pez1959's Avatar
pez1959 pez1959 is offline
Cap'n Patty
AKA: Patrick
FRC #1959 (Aye Aye Robot)
 
Join Date: Jan 2006
Rookie Year: 2006
Location: Blythewood SC
Posts: 36
pez1959 is on a distinguished road
Send a message via AIM to pez1959 Send a message via MSN to pez1959 Send a message via Yahoo to pez1959
Re: bumpers, a problem?

Quote:
Originally Posted by cleonavicius
I'm kind of curious, if bumpers are 2.5" off the ground, will they clear when the bot is going up the ramp? (assuming standard 4 wheels)
Well that's something to take into account when designing your bot...think trig. :-)
Reply With Quote
  #25   Spotlight this post!  
Unread 15-01-2006, 22:18
Doug G's Avatar
Doug G Doug G is offline
Coach / Teacher
FRC #0701 (Robovikes)
Team Role: Coach
 
Join Date: Dec 2002
Rookie Year: 2001
Location: Fairfield, CA
Posts: 880
Doug G has a reputation beyond reputeDoug G has a reputation beyond reputeDoug G has a reputation beyond reputeDoug G has a reputation beyond reputeDoug G has a reputation beyond reputeDoug G has a reputation beyond reputeDoug G has a reputation beyond reputeDoug G has a reputation beyond reputeDoug G has a reputation beyond reputeDoug G has a reputation beyond reputeDoug G has a reputation beyond repute
Re: bumpers, a problem?

For those who think that if your bumpers are at 2.5" off the ground and come in contact with a ball, they ball won't go under them - YOU'RE WRONG!!

We have already tested this with our practice robot and the balls go under the robot a lot, luckily we have enough driving wheels still on the ground for it not to be a big deal, but I guarantee there will be plenty of balls ran over this year and FIRST will be prepared for it. In 2004, they stocked 3x as many balls as needed for any one competition. That year we had a robot with about 3-4 inches of clearance, and we ran over dozens of 13" balls and sadly popped a fair share of them. Luckily this year they don't pop, but I suspect they'll be fairly chewed up after a day of matches.
__________________
Work Hard, Have Fun, Make a Difference!

Reply With Quote
  #26   Spotlight this post!  
Unread 15-01-2006, 23:35
pez1959's Avatar
pez1959 pez1959 is offline
Cap'n Patty
AKA: Patrick
FRC #1959 (Aye Aye Robot)
 
Join Date: Jan 2006
Rookie Year: 2006
Location: Blythewood SC
Posts: 36
pez1959 is on a distinguished road
Send a message via AIM to pez1959 Send a message via MSN to pez1959 Send a message via Yahoo to pez1959
Re: bumpers, a problem?

Question, when you were testing this, was the robot weighted a full 120 pounds or was it a light frame. If it was a light frame it would make a little more sense.
Reply With Quote
  #27   Spotlight this post!  
Unread 16-01-2006, 10:27
Evilfrog87's Avatar
Evilfrog87 Evilfrog87 is offline
Dave Thunes
AKA: David Thunes
FRC #0093 (New Apple Corps.)
Team Role: Driver
 
Join Date: Sep 2004
Rookie Year: 2003
Location: Appleton
Posts: 5
Evilfrog87 is an unknown quantity at this point
Send a message via AIM to Evilfrog87 Send a message via MSN to Evilfrog87
Re: bumpers, a problem?

I was under the impression that bumpers had to start 2.5 inches above the ground. No more, no less.

As to the problem with running over the balls, the Manual says:
“Bumper height has been specified so that robots will make contact bumper-to-bumper and so that the balls will be pushed rather than pulled under the robots.”

The biggest problem I see with the bumpers is going up the ramp. If you use 6” wheels, and have the bumper placed an inch behind them, you cannot make it up the ramp without bottoming out. (that is of course if the bottom of the bumper cannot be higher than 2.5” off the ground)
__________________
KP4EVR
Reply With Quote
  #28   Spotlight this post!  
Unread 16-01-2006, 11:09
pez1959's Avatar
pez1959 pez1959 is offline
Cap'n Patty
AKA: Patrick
FRC #1959 (Aye Aye Robot)
 
Join Date: Jan 2006
Rookie Year: 2006
Location: Blythewood SC
Posts: 36
pez1959 is on a distinguished road
Send a message via AIM to pez1959 Send a message via MSN to pez1959 Send a message via Yahoo to pez1959
Re: bumpers, a problem?

R35 is the bumper rule. It basically says the bumpers must stay between 2.5 and 8.5 inches. But if you use two pool "noodles" as suggested, that only gives you an inch or so of leeway. So 2.5 to about 3.5 inches from the ground. The mounting your bumpers so that you can go up the ramp is obviously something that needs to be kept in mind during your design and build stage. I won't give away our robot, but perhaps you could mount the bumpers on the sides perpedicular to the ramp instead of parrallel?

Another option, if you have drive wheels in the back and you hit the ramp, even if you're front wheels dont make the ground, the back wheels could push you up?


Just some things to think about

Last edited by pez1959 : 16-01-2006 at 11:12.
Reply With Quote
Reply


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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Need a realistic Statics Problem sanddrag Technical Discussion 10 05-12-2005 15:07
Problem w/Mesh Kevin Thorp 3D Animation and Competition 4 17-02-2005 23:04
Programming Problem: Extremely Frustrating chantilly_team Programming 19 12-02-2005 23:00
The problem with scouting... archiver 2001 10 23-06-2002 23:49
Major problem with chipphua motors aka Scott White Motors 18 19-03-2002 19:44


All times are GMT -5. The time now is 17:52.

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