Go to Post We are all on a big team named FIRST - Al Skierkiewicz [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
  #31   Spotlight this post!  
Unread 19-02-2013, 13:08
Jeffy's Avatar
Jeffy Jeffy is offline
Retired, for now
AKA: Jeff Gier
FRC #2410 (Metal Mustang Robotics) #159 (Alpine Robotics)
Team Role: College Student
 
Join Date: Mar 2008
Rookie Year: 2008
Location: Fort Collins
Posts: 523
Jeffy has a brilliant futureJeffy has a brilliant futureJeffy has a brilliant futureJeffy has a brilliant futureJeffy has a brilliant futureJeffy has a brilliant futureJeffy has a brilliant futureJeffy has a brilliant futureJeffy has a brilliant futureJeffy has a brilliant futureJeffy has a brilliant future
Re: Over weight robot

A few things:
-Replace all of the sheet metal with similar thickness polycarbonate.
-I can't see your battery mount, but based around the way the bot is built, it's probably overbuilt, but easy to modify
-Drop all the clips that hold in the pneumatic tanks and use 3-4 zipties.

Best of luck!
__________________
Metal Mustang Robotics 2410 (2008-2011)
2008 STL Rookie All-Star
2010 GKC Finalists
2010 OKC Champions
Alpine Robotics 159 (2012-)
2012 CO Finalists

700 miles from home, 2 miles from FRC. Life is good.
Reply With Quote
  #32   Spotlight this post!  
Unread 19-02-2013, 14:11
Orion.DeYoe Orion.DeYoe is offline
Registered User
FRC #5413 (Stellar Robotics)
Team Role: Mentor
 
Join Date: Feb 2012
Rookie Year: 2011
Location: North Fairfield, OH
Posts: 206
Orion.DeYoe is a splendid one to beholdOrion.DeYoe is a splendid one to beholdOrion.DeYoe is a splendid one to beholdOrion.DeYoe is a splendid one to beholdOrion.DeYoe is a splendid one to beholdOrion.DeYoe is a splendid one to beholdOrion.DeYoe is a splendid one to beholdOrion.DeYoe is a splendid one to behold
Unhappy Re: Over weight robot

Quote:
Originally Posted by Priyesh69 View Post
We now have 130lbs on our robot and have just kept the stric basic(2 arms, shooter). We don't know where to cut that extra 10 lbs.
Hmmm this is a problem. So the first thing I would do is replace your shooter's "runway" with two strips of metal. That will take out a very large amount of weight. That huge piece of plywood has to weigh at least 4 pounds so I would go to a hardware store (Menards or Lowes should have it) and get a piece of 1/8 inch polycarbonate to replace it) Another step is to remove any unnecessary cross-braces. You should also open up unused holes (and add new ones) in the KOP frame members all over your robot (you have a lot of those pieces and they're pretty heavy). Try to eliminate some fasteners (they add a large amount weight) if you have access to a welder then I would recommend welding parts that you don't need to disassemble, if not then you might try rivets. Also, 80-20 adds a ridiculous amount of weight so if you have any (I can't really tell from the picture) I would try replacing it with angle or something. Once again, I would drill LOTS and LOTS of holes, every little bit helps. If you do all of this and it's still not enough, take two drive motors off (if you have four). If worse comes to worse then you'll have to take a mechanism off .
Reply With Quote
  #33   Spotlight this post!  
Unread 19-02-2013, 14:15
Orion.DeYoe Orion.DeYoe is offline
Registered User
FRC #5413 (Stellar Robotics)
Team Role: Mentor
 
Join Date: Feb 2012
Rookie Year: 2011
Location: North Fairfield, OH
Posts: 206
Orion.DeYoe is a splendid one to beholdOrion.DeYoe is a splendid one to beholdOrion.DeYoe is a splendid one to beholdOrion.DeYoe is a splendid one to beholdOrion.DeYoe is a splendid one to beholdOrion.DeYoe is a splendid one to beholdOrion.DeYoe is a splendid one to beholdOrion.DeYoe is a splendid one to behold
Re: Over weight robot

Quote:
Originally Posted by jwallace15 View Post
I know you guys are short on weight, but are your accumulators plastic?

If they are, check this out...

It may be a good idea to keep the plastic accumulators, but please see the risk involved with it.
Please realize that this was a user error. There is no way that that tank burst by itself. There is nothing wrong with plastic tanks. Most likely the fittings on the tank were over tightened or it was dropped. Please try not to cause panic and bias towards a product because of one team's mistakes.
Reply With Quote
  #34   Spotlight this post!  
Unread 19-02-2013, 14:18
akgsteelers's Avatar
akgsteelers akgsteelers is offline
Manufacturing/Pit Lead
AKA: Andrew
FRC #0384 (Sparky)
Team Role: Mechanical
 
Join Date: Jan 2013
Rookie Year: 2012
Location: Henrico
Posts: 6
akgsteelers is an unknown quantity at this point
Re: Over weight robot

It looks like you have a lot of fasteners on your robot. If they are stainless steel or steel. if they are you could replace a lot of those with nylock or aluminum.
Hope this post helps.
__________________
SPARKY 384
Reply With Quote
  #35   Spotlight this post!  
Unread 19-02-2013, 21:14
FlusteredRookie FlusteredRookie is offline
Registered User
FRC #4423
 
Join Date: Feb 2013
Rookie Year: 2013
Location: Arizona
Posts: 6
FlusteredRookie can only hope to improve
Exclamation Re: Over weight robot

Our robot also has a weight issue... How strictly is the 120 pound rule enforced?
Reply With Quote
  #36   Spotlight this post!  
Unread 19-02-2013, 21:15
Hallry's Avatar
Hallry Hallry is online now
Dare to be FIRST
AKA: Ryan Hall
FRC #1676 (Pascack Pi-oneers)
Team Role: College Student
 
Join Date: Sep 2009
Rookie Year: 2010
Location: Woodcliff Lake NJ *Now in Newark DE
Posts: 2,692
Hallry has a reputation beyond reputeHallry has a reputation beyond reputeHallry has a reputation beyond reputeHallry has a reputation beyond reputeHallry has a reputation beyond reputeHallry has a reputation beyond reputeHallry has a reputation beyond reputeHallry has a reputation beyond reputeHallry has a reputation beyond reputeHallry has a reputation beyond reputeHallry has a reputation beyond repute
Re: Over weight robot

Quote:
Originally Posted by FlusteredRookie View Post
Our robot also has a weight issue... How strictly is the 120 pound rule enforced?
It's a rule in the Game Manual. If you don't meet the rule, your robot is illegal and thus can't compete. And yes, all robots are weighed, at each competition.
__________________
[2009-2013]: Team 1676 Student, Co-CEO, Carpentry Lead
[2013-Present]: Team 1676 Alumnus/College Mentor

Won: 2010 New Jersey Regional, 2010 Virginia Regional (undefeated), 2011 New Jersey Regional, 2011 Virginia Regional, 2011 Brunswick Eruption, 2012 Rutgers MAR District, 2012 girlPOWER, 2012 Ramp Riot, 2013 Bridgewater-Raritan MAR District, 2014 girlPOWER, 2015 Bridgewater-Raritan MAR District, 2016 Mt. Olive MAR District, 2016 Bridgewater-Raritan MAR District
2016 Season Recap Video: http://tinyurl.com/1676-2016
Facebook Instagram Twitter YouTube
Reply With Quote
  #37   Spotlight this post!  
Unread 19-02-2013, 21:17
FlusteredRookie FlusteredRookie is offline
Registered User
FRC #4423
 
Join Date: Feb 2013
Rookie Year: 2013
Location: Arizona
Posts: 6
FlusteredRookie can only hope to improve
Re: Over weight robot

You have got to be kidding me.... How heavily enforced is the bag and tag rule?
Reply With Quote
  #38   Spotlight this post!  
Unread 19-02-2013, 21:21
Hallry's Avatar
Hallry Hallry is online now
Dare to be FIRST
AKA: Ryan Hall
FRC #1676 (Pascack Pi-oneers)
Team Role: College Student
 
Join Date: Sep 2009
Rookie Year: 2010
Location: Woodcliff Lake NJ *Now in Newark DE
Posts: 2,692
Hallry has a reputation beyond reputeHallry has a reputation beyond reputeHallry has a reputation beyond reputeHallry has a reputation beyond reputeHallry has a reputation beyond reputeHallry has a reputation beyond reputeHallry has a reputation beyond reputeHallry has a reputation beyond reputeHallry has a reputation beyond reputeHallry has a reputation beyond reputeHallry has a reputation beyond repute
Re: Over weight robot

Quote:
Originally Posted by FlusteredRookie View Post
You have got to be kidding me.... How heavily enforced is the bag and tag rule?
It is also a rule...it doesn't matter if it is enforced heavily or not. What matters is that it is an official FIRST rule, which all teams should follow. If you break the rule, your robot is illegal. All other teams are stopping work on their robot today...why should you be an exception?
__________________
[2009-2013]: Team 1676 Student, Co-CEO, Carpentry Lead
[2013-Present]: Team 1676 Alumnus/College Mentor

Won: 2010 New Jersey Regional, 2010 Virginia Regional (undefeated), 2011 New Jersey Regional, 2011 Virginia Regional, 2011 Brunswick Eruption, 2012 Rutgers MAR District, 2012 girlPOWER, 2012 Ramp Riot, 2013 Bridgewater-Raritan MAR District, 2014 girlPOWER, 2015 Bridgewater-Raritan MAR District, 2016 Mt. Olive MAR District, 2016 Bridgewater-Raritan MAR District
2016 Season Recap Video: http://tinyurl.com/1676-2016
Facebook Instagram Twitter YouTube
Reply With Quote
  #39   Spotlight this post!  
Unread 19-02-2013, 21:33
FlusteredRookie FlusteredRookie is offline
Registered User
FRC #4423
 
Join Date: Feb 2013
Rookie Year: 2013
Location: Arizona
Posts: 6
FlusteredRookie can only hope to improve
Re: Over weight robot

we were just making sure.

time to swiss cheese our robot.
Reply With Quote
  #40   Spotlight this post!  
Unread 19-02-2013, 22:59
dtengineering's Avatar
dtengineering dtengineering is offline
Teaching Teachers to Teach Tech
AKA: Jason Brett
no team (British Columbia FRC teams)
Team Role: Mentor
 
Join Date: Jan 2005
Rookie Year: 2004
Location: Vancouver, BC
Posts: 1,833
dtengineering has a reputation beyond reputedtengineering has a reputation beyond reputedtengineering has a reputation beyond reputedtengineering has a reputation beyond reputedtengineering has a reputation beyond reputedtengineering has a reputation beyond reputedtengineering has a reputation beyond reputedtengineering has a reputation beyond reputedtengineering has a reputation beyond reputedtengineering has a reputation beyond reputedtengineering has a reputation beyond repute
Re: Over weight robot

You should actually aim to bring your robot in a few pounds under 120 so that you can make minor modifications at the competition. The 120 pound limit is strictly enforced and you can be reinspected at any point.

Yeah, I know... that advice really helps now, doesn't it?

If you have four CIMs in your drivetrain, you can solve most of your problem just by getting rid of two of them. Yes it will affect your performance... but perhaps not by as much as you fear.

I've found that replacing all the steel screws holding the electronics down with nylon screws can shave about a pound.

The best weight loss program I've seen dropped 30lbs from a robot on Thursday, at an event. We've done ten or fifteen pounds, but it took us a weekend of build time.

One thing you might want to consider is rebuilding one of your components out of lighter weight materials. You can do this as part of your "withholding" limit. Then you could unbolt your current "heavy" unit and replace it with the "lighter" unit at the event...



Jason
Reply With Quote
  #41   Spotlight this post!  
Unread 20-02-2013, 10:09
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: Over weight robot

I removed 8 lbs of redundant and oversized hardware from a robot once. Remove large screws that aren't needed, replace screws holding on light components and other items with zip ties, and cut down pieces of aluminum that have excess length that aren't holding anything. Holes only go so far...
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


All times are GMT -5. The time now is 16:29.

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