Go to Post If a team wants to cheat then it does nothing but give them a bad cloud hanging over their own heads. - Jon K. [more]
Home
Go Back   Chief Delphi > FIRST > Robot Showcase
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 17-11-2011, 18:43
HumblePie's Avatar
HumblePie HumblePie is offline
Registered User
AKA: Mista Doug
FRC #3489 (Category 5)
Team Role: Mentor
 
Join Date: Nov 2010
Rookie Year: 2010
Location: SC Lowcountry
Posts: 134
HumblePie is just really niceHumblePie is just really niceHumblePie is just really niceHumblePie is just really niceHumblePie is just really nice
Custom Wheels

As a rookie team last year, Team 3489 (Category 5) knew little about what build season would hold, but we were pretty sure we'd need wheels. Looking at the simpler COTS options, all had drawbacks. We decided to develop a custom molded urethane wheel that would allow us to pick the geometry and hardness of our wheel tread. A goal was also to eliminate/reduce "throwing" of treads sometimes seen on the Plaction wheels. What we arrived at was a fiberglass reinforced 50 Durometer wheel with a subtle (crowned) tread, molded in place on a 6 inch Performance Wheel.

At our only regional, our 4WD setup on toughbox tubes showed good traction but only fair turning. When we committed to our defensive strategy we were not easily pushed. Integrated jackstands made it really hard to move us when deployed.

For fall scrimmage at SCRIW, we changed out the front wheels for 6 inch omnis, since we already had the jackstands. Much better maneuverability, and still managed to do some pushing against some 6WD drop center drives. Through it all, we have yet to lose a tread on carpet (sound of wood being knocked).

Anyhow, here's some pics, let us know what you think....

https://picasaweb.google.com/1072554...09673741865922

https://picasaweb.google.com/1072554...10166594184162
__________________
FRC Team 3489 "Category 5"
  #2   Spotlight this post!  
Unread 15-12-2011, 03:37
Mk.32's Avatar
Mk.32 Mk.32 is offline
Registered User
AKA: Mark
FRC #2485 (W.A.R. Lords)
Team Role: Engineer
 
Join Date: Jan 2011
Rookie Year: 2011
Location: San Diego
Posts: 770
Mk.32 has much to be proud ofMk.32 has much to be proud ofMk.32 has much to be proud ofMk.32 has much to be proud ofMk.32 has much to be proud ofMk.32 has much to be proud ofMk.32 has much to be proud ofMk.32 has much to be proud ofMk.32 has much to be proud ofMk.32 has much to be proud of
Re: Custom Wheels

Hm the links seem not to be working?
Sounds like a interesting idea!
__________________
Engineering mentor: Team 2485: WARLords 2013-

Team President: Team 3647 2010-2013
  #3   Spotlight this post!  
Unread 15-12-2011, 08:10
Jimmy Nichols's Avatar
Jimmy Nichols Jimmy Nichols is offline
Mentor,QCR Planning
FRC #1038 (The Thunderhawks)
Team Role: Mentor
 
Join Date: Feb 2005
Rookie Year: 2004
Location: Cincinnati, Ohio
Posts: 1,030
Jimmy Nichols has a reputation beyond reputeJimmy Nichols has a reputation beyond reputeJimmy Nichols has a reputation beyond reputeJimmy Nichols has a reputation beyond reputeJimmy Nichols has a reputation beyond reputeJimmy Nichols has a reputation beyond reputeJimmy Nichols has a reputation beyond reputeJimmy Nichols has a reputation beyond reputeJimmy Nichols has a reputation beyond reputeJimmy Nichols has a reputation beyond reputeJimmy Nichols has a reputation beyond repute
Send a message via Yahoo to Jimmy Nichols
Re: Custom Wheels

Quote:
Originally Posted by Mk.32 View Post
Hm the links seem not to be working?
Sounds like a interesting idea!
Ditto, Would like to see some pics!
__________________
Jimmy - Lead Mentor, Pit Boss, Miami Valley FRC Regional Planning Committee
Lakota Robotics - FRC Team 1038

2013 - Crossroads Team Spirit,Quarter-Finalists - Queen City WFFA - Paul George,Quarter-Finalists - Ohio FRC State Championship Champions
2012 - Queen City Volunteer of the Year,Team Spirit,Finalists - Smoky Mountains Engineering Inspiration,Quarterfinalists
2011 - Pittsburgh Semifinalists - Buckeye Engineering Excellence Award,Coopertition Award,SemiFinalists
2010 - Pittsburgh Judge’s Award,Quarterfinalists - Buckeye Industrial Design Award,Finalists - IRI Mentor Round Champions
2009 - Buckeye GM Industrial Design,Champions
2008 - Midwest Engineering Inspiration,Quarterfinalist - IRI Semifinalist
2007 - Pittsburgh Motorola Quality,Finalist - Buckeye Rockwell Automation Innovative Controls,Finalist - Championship Newton Quarterfinalist
  #4   Spotlight this post!  
Unread 15-12-2011, 10:34
Brandon Holley's Avatar
Brandon Holley Brandon Holley is offline
Chase perfection. Catch excellence.
AKA: Let's bring CD back to the way it used to be
FRC #0125 (NU-TRONs, Team #11 Alumni (GO MORT))
Team Role: Engineer
 
Join Date: Jan 2004
Rookie Year: 2001
Location: Boston, MA
Posts: 2,593
Brandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond repute
Send a message via AIM to Brandon Holley
Re: Custom Wheels

I don't know if you ever saw this thread, its a couple years old: http://www.chiefdelphi.com/media/photos/34720

Long story short, I thoroughly approve...

-Brando
__________________
MORT (Team 11) '01-'05 :
-2005 New Jersey Regional Chairman's Award Winners
-2013 MORT Hall of Fame Inductee

NUTRONs (Team 125) '05-???
2007 Boston Regional Winners
2008 & 2009 Boston Regional Driving Tomorrow's Technology Award
2010 Boston Regional Creativity Award
2011 Bayou Regional Finalists, Innovation in Control Award, Boston Regional Finalists, Industrial Design Award
2012 New York City Regional Winners, Boston Regional Finalists, IRI Mentor of the Year
2013 Orlando Regional Finalists, Industrial Design Award, Boston Regional Winners, Pine Tree Regional Finalists
2014 Rhode Island District Winners, Excellence in Engineering Award, Northeastern University District Winners, Industrial Design Award, Pine Tree District Chairman's Award, Pine Tree District Winners
2015 South Florida Regional Chairman's Award, NU District Winners, NEDCMP Industrial Design Award, Hopper Division Finalists, Hopper/Newton Gracious Professionalism Award
  #5   Spotlight this post!  
Unread 15-12-2011, 13:22
HumblePie's Avatar
HumblePie HumblePie is offline
Registered User
AKA: Mista Doug
FRC #3489 (Category 5)
Team Role: Mentor
 
Join Date: Nov 2010
Rookie Year: 2010
Location: SC Lowcountry
Posts: 134
HumblePie is just really niceHumblePie is just really niceHumblePie is just really niceHumblePie is just really niceHumblePie is just really nice
Re: Custom Wheels

Well, here's another shot at it.... Work filters have their ways, ya know.

https://plus.google.com/photos/10248...CK2p1N3ssbWSRQ

BTW, our team colors are black/red.
__________________
FRC Team 3489 "Category 5"
  #6   Spotlight this post!  
Unread 15-12-2011, 13:25
Kevin Thorp's Avatar
Kevin Thorp Kevin Thorp is offline
Registered User
AKA: Kevin Thorp
FRC #3489 (Category 5)
Team Role: Mentor
 
Join Date: Dec 2002
Rookie Year: 1998
Location: Charleston, SC
Posts: 598
Kevin Thorp has a reputation beyond reputeKevin Thorp has a reputation beyond reputeKevin Thorp has a reputation beyond reputeKevin Thorp has a reputation beyond reputeKevin Thorp has a reputation beyond reputeKevin Thorp has a reputation beyond reputeKevin Thorp has a reputation beyond reputeKevin Thorp has a reputation beyond reputeKevin Thorp has a reputation beyond reputeKevin Thorp has a reputation beyond reputeKevin Thorp has a reputation beyond repute
Re: Custom Wheels

Cool. Can you mold our team number into the tread?
  #7   Spotlight this post!  
Unread 16-12-2011, 10:06
Coach Norm Coach Norm is offline
Team 2468 Coach/Adviser
AKA: Norman Morgan
FRC #2468 (Team Appreciate)
Team Role: Teacher
 
Join Date: Nov 2007
Rookie Year: 2008
Location: Austin, Texas
Posts: 444
Coach Norm has a reputation beyond reputeCoach Norm has a reputation beyond reputeCoach Norm has a reputation beyond reputeCoach Norm has a reputation beyond reputeCoach Norm has a reputation beyond reputeCoach Norm has a reputation beyond reputeCoach Norm has a reputation beyond reputeCoach Norm has a reputation beyond reputeCoach Norm has a reputation beyond reputeCoach Norm has a reputation beyond reputeCoach Norm has a reputation beyond repute
Re: Custom Wheels

Can you share some information on how your team made these:

What materials? What supplier?
How did you make the molds?

Did you mold the performance wheel? or was it purchased?
__________________
FRC 2468 Team Lead 2008 - Present

Win The Day!
  #8   Spotlight this post!  
Unread 18-12-2011, 07:33
HumblePie's Avatar
HumblePie HumblePie is offline
Registered User
AKA: Mista Doug
FRC #3489 (Category 5)
Team Role: Mentor
 
Join Date: Nov 2010
Rookie Year: 2010
Location: SC Lowcountry
Posts: 134
HumblePie is just really niceHumblePie is just really niceHumblePie is just really niceHumblePie is just really niceHumblePie is just really nice
Re: Custom Wheels

The material is EP1150, a 50 durometer urethane from Eager Polymers. The molds are made on a FDM 3-D printer. The mold is made in 3 sections to facilitate removal of the finished wheel. I also printed a small funnel to facilitate pouring the urethane into the small crevice (it seems that a shorter sidewall holds up better). The performance wheel is a COTS item, and I wrap the wheel with a couple of wraps of fiberglass drywall tape before overmolding to help adhesion and strengthen the tread.
__________________
FRC Team 3489 "Category 5"
  #9   Spotlight this post!  
Unread 19-12-2011, 09:10
Brandon Holley's Avatar
Brandon Holley Brandon Holley is offline
Chase perfection. Catch excellence.
AKA: Let's bring CD back to the way it used to be
FRC #0125 (NU-TRONs, Team #11 Alumni (GO MORT))
Team Role: Engineer
 
Join Date: Jan 2004
Rookie Year: 2001
Location: Boston, MA
Posts: 2,593
Brandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond repute
Send a message via AIM to Brandon Holley
Re: Custom Wheels

Quote:
Originally Posted by HumblePie View Post
The material is EP1150, a 50 durometer urethane from Eager Polymers. The molds are made on a FDM 3-D printer. The mold is made in 3 sections to facilitate removal of the finished wheel. I also printed a small funnel to facilitate pouring the urethane into the small crevice (it seems that a shorter sidewall holds up better). The performance wheel is a COTS item, and I wrap the wheel with a couple of wraps of fiberglass drywall tape before overmolding to help adhesion and strengthen the tread.

Sweet man!

I use FDM 3D molds all the time. It's a great way to make a quick and effective mold.

Have you done any tests to determine the traction differences in your new urethane versus roughtop conveyor belting?

-Brando
__________________
MORT (Team 11) '01-'05 :
-2005 New Jersey Regional Chairman's Award Winners
-2013 MORT Hall of Fame Inductee

NUTRONs (Team 125) '05-???
2007 Boston Regional Winners
2008 & 2009 Boston Regional Driving Tomorrow's Technology Award
2010 Boston Regional Creativity Award
2011 Bayou Regional Finalists, Innovation in Control Award, Boston Regional Finalists, Industrial Design Award
2012 New York City Regional Winners, Boston Regional Finalists, IRI Mentor of the Year
2013 Orlando Regional Finalists, Industrial Design Award, Boston Regional Winners, Pine Tree Regional Finalists
2014 Rhode Island District Winners, Excellence in Engineering Award, Northeastern University District Winners, Industrial Design Award, Pine Tree District Chairman's Award, Pine Tree District Winners
2015 South Florida Regional Chairman's Award, NU District Winners, NEDCMP Industrial Design Award, Hopper Division Finalists, Hopper/Newton Gracious Professionalism Award
  #10   Spotlight this post!  
Unread 19-12-2011, 13:24
HumblePie's Avatar
HumblePie HumblePie is offline
Registered User
AKA: Mista Doug
FRC #3489 (Category 5)
Team Role: Mentor
 
Join Date: Nov 2010
Rookie Year: 2010
Location: SC Lowcountry
Posts: 134
HumblePie is just really niceHumblePie is just really niceHumblePie is just really niceHumblePie is just really niceHumblePie is just really nice
Re: Custom Wheels

No empirical data yet. The initial thought behind the overmolded tread was the ability to crown the tread for better turning, and to avoid throwing the belt tread (which we've seen happen). We tried a teat setup with a bathroom scale up against the wall last year, but ended up mostly burning a hole in the carpet . Maybe this year I can find a fish scale/strain gage with a peak hold function. If I can make that happen in my spare time I'll post the results here.

On the real world application side, we went up against a few West Coast drives with belt tread last year and held our own. We had sort of a "hybrid" 4WD with our molded urethane tread on the rear, omnis on the front, and integrated jackstands to hold firm if we were getting pushed.
__________________
FRC Team 3489 "Category 5"
  #11   Spotlight this post!  
Unread 19-12-2011, 13:27
Brandon Holley's Avatar
Brandon Holley Brandon Holley is offline
Chase perfection. Catch excellence.
AKA: Let's bring CD back to the way it used to be
FRC #0125 (NU-TRONs, Team #11 Alumni (GO MORT))
Team Role: Engineer
 
Join Date: Jan 2004
Rookie Year: 2001
Location: Boston, MA
Posts: 2,593
Brandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond repute
Send a message via AIM to Brandon Holley
Re: Custom Wheels

Quote:
Originally Posted by HumblePie View Post

On the real world application side, we went up against a few West Coast drives with belt tread last year and held our own. We had sort of a "hybrid" 4WD with our molded urethane tread on the rear, omnis on the front, and integrated jackstands to hold firm if we were getting pushed.
Have any videos of this you are particularly proud of? Not that I'm questioning you, I'm just genuinely curious to see it.

I think you've done a nice job of implementing a urethane molding process. The nice thing is you can use this process almost everywhere on the robot (linear bearings, intake rollers, etc.)

-Brando
__________________
MORT (Team 11) '01-'05 :
-2005 New Jersey Regional Chairman's Award Winners
-2013 MORT Hall of Fame Inductee

NUTRONs (Team 125) '05-???
2007 Boston Regional Winners
2008 & 2009 Boston Regional Driving Tomorrow's Technology Award
2010 Boston Regional Creativity Award
2011 Bayou Regional Finalists, Innovation in Control Award, Boston Regional Finalists, Industrial Design Award
2012 New York City Regional Winners, Boston Regional Finalists, IRI Mentor of the Year
2013 Orlando Regional Finalists, Industrial Design Award, Boston Regional Winners, Pine Tree Regional Finalists
2014 Rhode Island District Winners, Excellence in Engineering Award, Northeastern University District Winners, Industrial Design Award, Pine Tree District Chairman's Award, Pine Tree District Winners
2015 South Florida Regional Chairman's Award, NU District Winners, NEDCMP Industrial Design Award, Hopper Division Finalists, Hopper/Newton Gracious Professionalism Award
  #12   Spotlight this post!  
Unread 19-12-2011, 14:00
Garrett.d.w's Avatar
Garrett.d.w Garrett.d.w is offline
Build Lead
FRC #2733 (The Pigmice)
Team Role: Alumni
 
Join Date: Jul 2011
Rookie Year: 2010
Location: Portland
Posts: 318
Garrett.d.w is a splendid one to beholdGarrett.d.w is a splendid one to beholdGarrett.d.w is a splendid one to beholdGarrett.d.w is a splendid one to beholdGarrett.d.w is a splendid one to beholdGarrett.d.w is a splendid one to beholdGarrett.d.w is a splendid one to behold
Re: Custom Wheels

Beautiful custom tread. I too would like to see a video of your jack stands in action.
__________________
"A mind once stretched by a thought will never regain it's original dimensions."

Optimists think the glass is half full.
Pessimists think the glass is half empty.
Engineers realize it's twice as big as it needs to be.
  #13   Spotlight this post!  
Unread 19-12-2011, 22:26
HumblePie's Avatar
HumblePie HumblePie is offline
Registered User
AKA: Mista Doug
FRC #3489 (Category 5)
Team Role: Mentor
 
Join Date: Nov 2010
Rookie Year: 2010
Location: SC Lowcountry
Posts: 134
HumblePie is just really niceHumblePie is just really niceHumblePie is just really niceHumblePie is just really niceHumblePie is just really nice
Re: Custom Wheels

http://www.youtube.com/watch?feature...&v=Sd7vXl6h2JM

Not a lot to see as the jackstands only lift the bot about 1/8", but from about the 1:20 mark on, when the bot is not moving, the jackstands are usually deployed. With our bot broadside to the West Coast drive of Exploding Bacon, we held our position, despite the omnis on the front.
__________________
FRC Team 3489 "Category 5"
  #14   Spotlight this post!  
Unread 27-12-2011, 04:58
Cory's Avatar
Cory Cory is offline
Registered User
AKA: Cory McBride
FRC #0254 (The Cheesy Poofs)
Team Role: Engineer
 
Join Date: May 2002
Rookie Year: 2001
Location: Redwood City, CA
Posts: 6,824
Cory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond repute
Send a message via AIM to Cory
Re: Custom Wheels

----
__________________
2001-2004: Team 100
2006-Present: Team 254

Last edited by Cory : 27-12-2011 at 13:43. Reason: deleted quoted spam image
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 00:30.

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