Go to Post Well, it worked in inventor . . . - Chris Fultz [more]
Home
Go Back   Chief Delphi > ChiefDelphi.com Website > Extra Discussion
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
Reply
Thread Tools Rate Thread Display Modes
  #1   Spotlight this post!  
Unread 05-02-2009, 01:12
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: 1,827
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
pic: 1346 Side View 2009

Reply With Quote
  #2   Spotlight this post!  
Unread 05-02-2009, 01:13
akeisic's Avatar
akeisic akeisic is offline
Systems and Strategy Mentor
AKA: Andrew Keisic
FRC #4201 (The Vitruvian Bots)
Team Role: Leadership
 
Join Date: Jan 2007
Rookie Year: 1999
Location: Redondo Beach, CA
Posts: 82
akeisic is a name known to allakeisic is a name known to allakeisic is a name known to allakeisic is a name known to allakeisic is a name known to allakeisic is a name known to all
Re: pic: 1346 Side View 2009

The design looks really clean. Neat feature to use oval holes for the wheels.
__________________
Mentor: FRC 4201 - The Vitruvian Bots

Awards with FRC 294 - Beach Cities Robotics
2014: LA FRC Champions
2012: LA FRC Finalists
2011: San Diego FRC Finalists
2010: San Diego FTC Finalists, San Diego FRC Champions, LA FRC Finalist, FRC World Champions
2009: LA FRC Finalist
2008: San Diego FRC Champions, LA FRC Finalist, LA FTC Champions, LA VCR Champions,
2007: San Diego FRC Finalist, San Diego FTC Champions, FTC World Champions
Reply With Quote
  #3   Spotlight this post!  
Unread 05-02-2009, 02:05
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: 1,827
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: pic: 1346 Side View 2009

The ovals were cut out in one piece and the wood has been recycled for use as tethered mini-sumo robot control boards for my "Robotics and Flight 10" class. They were rather easy to cut out with a CNC router and offered the maximum access to the inside of the box with the minimum reduction in shear strength should the outside corner take a hit.

Jason

P.S. I hope the wiring will look just as clean once we actually have wiring!
Reply With Quote
  #4   Spotlight this post!  
Unread 05-02-2009, 08:08
russoch518's Avatar
russoch518 russoch518 is offline
Registered User
FLL #3044 (3440)
 
Join Date: Feb 2009
Rookie Year: 2009
Location: Ballston Spa
Posts: 1
russoch518 is an unknown quantity at this point
Re: pic: 1346 Side View 2009

Question for team 1346. Does your team feel that a six wheel robot will be better then at four wheel one for the game we will be playing? Also tell could you tell me why you guys came up with six wheels other then four.
Also could you tell us how well the robot turns.
Team 3044
Reply With Quote
  #5   Spotlight this post!  
Unread 05-02-2009, 12:18
=Martin=Taylor= =Martin=Taylor= is offline
run the trap!!!
FRC #0100 (The Wild Hat Society)
Team Role: Human Player
 
Join Date: Feb 2006
Rookie Year: 2005
Location: Bezerkeley, California
Posts: 1,255
=Martin=Taylor= has a reputation beyond repute=Martin=Taylor= has a reputation beyond repute=Martin=Taylor= has a reputation beyond repute=Martin=Taylor= has a reputation beyond repute=Martin=Taylor= has a reputation beyond repute=Martin=Taylor= has a reputation beyond repute=Martin=Taylor= has a reputation beyond repute=Martin=Taylor= has a reputation beyond repute=Martin=Taylor= has a reputation beyond repute=Martin=Taylor= has a reputation beyond repute=Martin=Taylor= has a reputation beyond repute
Re: pic: 1346 Side View 2009

Not sure how much more you have to do. But you can't be that far behind.

Since you've mounted the electronics: about how much do they add to the weight? My team thinks they will weigh 20 lbs. Is that outrageous?
__________________
"Cooperation; because life is a team sport"
-Philip J. Fry
Reply With Quote
  #6   Spotlight this post!  
Unread 05-02-2009, 12:29
martin417's Avatar
martin417 martin417 is offline
Opinionated old goat
AKA: Martin Wilson
no team
Team Role: Mentor
 
Join Date: Feb 2008
Rookie Year: 2008
Location: Buford, GA
Posts: 719
martin417 has a reputation beyond reputemartin417 has a reputation beyond reputemartin417 has a reputation beyond reputemartin417 has a reputation beyond reputemartin417 has a reputation beyond reputemartin417 has a reputation beyond reputemartin417 has a reputation beyond reputemartin417 has a reputation beyond reputemartin417 has a reputation beyond reputemartin417 has a reputation beyond reputemartin417 has a reputation beyond repute
Re: pic: 1346 Side View 2009

Quote:
Originally Posted by russoch518 View Post
Question for team 1346. Does your team feel that a six wheel robot will be better then at four wheel one for the game we will be playing? Also tell could you tell me why you guys came up with six wheels other then four.
Also could you tell us how well the robot turns.
Team 3044
Our design is similar. The reason we went with a six wheel, dropped center design, is that most of the time you will be sitting on four wheels (the front or rear wheels are always off the ground) Since your wheels are very close together, you turn easier and faster. You can't do this with only four wheels because you would fall over backward (or forwards)
__________________
Former Mentor Team 1771
Former mentor Team 4509
Reply With Quote
  #7   Spotlight this post!  
Unread 05-02-2009, 12:36
Bob Steele's Avatar
Bob Steele Bob Steele is offline
Professional Steamacrit Hunter
AKA: Bob Steele
FRC #1983 (Skunk Works Robotics)
Team Role: Coach
 
Join Date: Jan 2003
Rookie Year: 2002
Location: Seattle, Washington
Posts: 1,511
Bob Steele has a reputation beyond reputeBob Steele has a reputation beyond reputeBob Steele has a reputation beyond reputeBob Steele has a reputation beyond reputeBob Steele has a reputation beyond reputeBob Steele has a reputation beyond reputeBob Steele has a reputation beyond reputeBob Steele has a reputation beyond reputeBob Steele has a reputation beyond reputeBob Steele has a reputation beyond reputeBob Steele has a reputation beyond repute
Re: pic: 1346 Side View 2009

Nice looking robot !!!
We look forward to playing robots with you guys!!

Our swerve came to life (finally) last night... and we shot the first balls from our mini-shooter last night also... so perhaps by this weekend we will have something to post...

We are busy working on the swerve controls...

By the way, last night we weighed our control board and it weighed 18 lbs..but it was on an 8 lb chunk of plywood (which we won't be using..) so it would appear to me that the control system (with 4 Jags) weighs in the neighborhood of 10 pounds wired...

We are switching over to a hexcell board for mounting the electronics on the weekend..

This could be fun... well... actually it already is fun...

Good luck!!
We look forward to seeing your finished product on the field!!

R
__________________
Raisbeck Aviation High School TEAM 1983 - Seattle, Washington
Las Vegas 07 WINNER w/ 1425/254...Seattle 08 WINNER w/ 2046/949.. Oregon 09 WINNER w/1318/2635..SEA 10 RCA ..Spokane 12 WINNER w/2122/4082 and RCA...Central Wa 13 WINNER w/1425/753..Seattle 13 WINNER w/948/492 & RCA ..Spokane 13 WINNER w/2471/4125.. Spokane 14 - DCA --Auburn 14 - WINNER w/1318/4960..District CMP 14 WINNER w/1318/2907, District CMA.. CMP 14 Newton Finalist w 971/341/3147 ... Auburn Mountainview 15 WINNER w/1318/3049 - Mt Vernon 15 WINNER w/1318/4654 - Philomath 15 WINNER w/955/847 -District CMP 15 WINNER w/955/2930 & District CMA -CMP Newton -Industrial Design Award

Reply With Quote
  #8   Spotlight this post!  
Unread 05-02-2009, 12:47
MrForbes's Avatar
MrForbes MrForbes is online now
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: 5,953
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: pic: 1346 Side View 2009

Looking good, time to start (or continue) burning the midnight oil!

I think our electronics board weighs about 20 lbs, it's also a huge thick plywood box....sure is nice to work on, and so far we can afford the weight.
Reply With Quote
  #9   Spotlight this post!  
Unread 05-02-2009, 15:23
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: 1,827
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: pic: 1346 Side View 2009

Quote:
Originally Posted by russoch518 View Post
Question for team 1346. Does your team feel that a six wheel robot will be better then at four wheel one for the game we will be playing? Also tell could you tell me why you guys came up with six wheels other then four.
Also could you tell us how well the robot turns.
Team 3044
We'll hopefully be able to answer the question about how well it turns before we ship it out, however the final determination of that will likely be based upon how well we can master traction control. Thanks to the modular design of the robot we can unbolt one of the drive modules and the control module and keep them back as part of our 40 pounds of robot that we don't have to ship, and attempt to optimize traction control in the time between ship date and the Seattle regional. It may even be possible to keep both of the drive modules if we unbolt the CIMs and ship the CIMs, then just use a couple of spare CIMs for testing purposes. That depends on final weights and how much assembly we want to do on Thursday in Seattle.

As for the "why" part of the question, however, I will reference this thread http://www.chiefdelphi.com/forums/sh...ad.php?t=71238 and the white paper/spreadsheet referenced in it.

This robot is, actually, a four wheel drive robot... as most 6wd designs actually are. In our case the front two wheels are 1/8" off the ground. This means that the wheel base is effectively the distance between the two rear axles, or about 13". By reducing the wheel base, and maximizing the width between the wheels we are maximizing our turning torque by reducing the amount of scrubbing that will occurr during turns.

The two front wheels are there just to keep us from tipping forward and to help us get back up on the regolith from the carpet... if we run in to weight issues, we could probably get rid of the drive chain leading to them and, even, the front wheels themselves.

Jason
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
pic: 1346 Feb 4 2009 dtengineering Extra Discussion 6 05-02-2009 09:49
pic: Drivetrain Side View AustinSchuh Extra Discussion 23 30-12-2006 03:41
pic: Team 226 side view CD47-Bot Robot Showcase 8 25-02-2004 16:25
pic: Team 271's Side View CD47-Bot Robot Showcase 1 17-03-2003 18:48
pic: Right Side view CD47-Bot Robot Showcase 2 03-03-2003 15:26


All times are GMT -5. The time now is 23:33.

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