Go to Post Sooo....in the famous words of Douglas Adams, Don't Panic. - Conor Ryan [more]
Home
Go Back   Chief Delphi > Technical > Technical Discussion
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 16-12-2005, 19:42
TheFerret's Avatar
TheFerret TheFerret is offline
Registered User
AKA: Travis
#1084 (Suncor/O P G Lambton Generating Station & St Clair Secondary School)
Team Role: Mechanical
 
Join Date: Dec 2004
Rookie Year: 2005
Location: Sarnia
Posts: 5
TheFerret is an unknown quantity at this point
Mecanum Wheels

Our team this year is looking at mecanum wheels, the only problem is that we don't know where to get them (or to an extent make them)... Is there anyplace that we can buy some from or do we just have to make our own...
__________________
  #2   Spotlight this post!  
Unread 16-12-2005, 19:52
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: 6,812
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: Mecanum Wheels

These threads would probably be helpful:

http://www.chiefdelphi.com/forums/sh...light=mechanum

http://www.chiefdelphi.com/forums/sh...light=mechanum

http://www.chiefdelphi.com/forums/sh...light=mechanum

http://www.chiefdelphi.com/forums/sh...hlight=mecanum
__________________
2001-2004: Team 100
2006-Present: Team 254
  #3   Spotlight this post!  
Unread 20-12-2005, 17:45
ahecht's Avatar
ahecht ahecht is offline
'Luzer'
AKA: Zan
no team
Team Role: Alumni
 
Join Date: Dec 2001
Rookie Year: 2002
Location: Billerica, MA
Posts: 978
ahecht has a reputation beyond reputeahecht has a reputation beyond reputeahecht has a reputation beyond reputeahecht has a reputation beyond reputeahecht has a reputation beyond reputeahecht has a reputation beyond reputeahecht has a reputation beyond reputeahecht has a reputation beyond reputeahecht has a reputation beyond reputeahecht has a reputation beyond reputeahecht has a reputation beyond repute
Send a message via ICQ to ahecht Send a message via AIM to ahecht Send a message via Yahoo to ahecht
Re: Mecanum Wheels

Another thread to look at would be:
http://www.chiefdelphi.com/forums/sh...ad.php?t=39818

190 is working on getting drawings of our wheels put into a whitepaper, but we are still trying to find a backup copy of our CAD files (since our CAD computer had a hard drive failure).
__________________
Zan Hecht

Scorekeeper: '05 Championship DaVinci Field/'10 WPI Regional
Co-Founder: WPI-EBOT Educational Robotics Program
Alumnus: WPI/Mass Academy Team #190
Alumnus (and founder): Oakwood Robotics Team #992


"Life is an odd numbered problem the answer isn't in the back of the book." — Anonymous WPI Student
  #4   Spotlight this post!  
Unread 28-12-2005, 20:27
NeilR NeilR is offline
Adjunct Lecturer, UNC Asheville
FRC #3971 (Kai Orbus)
Team Role: Mentor
 
Join Date: Dec 2005
Rookie Year: 2002
Location: Asheville, NC
Posts: 6
NeilR is on a distinguished road
Lightbulb Re: Mecanum Wheels

Hi all;

Over the past two years I have developed and built an 8" Mechanum (Mecanum?) wheel that I am finally in a position to provide to a limited number of FIRST teams. I have attached photos, and you may direct questions to my email at Neil@vectorr.com. This is NOT a money making affair, just trying to recoup a portion of my tooling costs, which have been considerable.

The specs are as follows:

Overall diameter = 8"
Width, all inclusive = 5"
Tire material = 80 durometer urethane rubber
Hub material = Aluminum 6061
Weight = approx 5.5 lb per wheel
Cost = $85 per wheel plus shipping
Bore = 3/4" with 3/16" keyway
A pair of ball bearings on each idler, total of 12 per wheel

This is a nice wheel, fully tooled and properly assembled. Should perform well. You may want to add loctite to the fasteners. I don't do that, just in case you want to change it somehow. This is easy to take apart and put back together. I may have some spare parts available as well, contact me.

I can provide (for free) an algorithm for steering a robot with 4 of these. You will need 4 independent drives to make it play, with all on the ground at all times.

Neil Rosenberg

P.S. I've only got enough for 25 sets, first come first serve!

P.P.S. I offer no warranty either expressed or implied. I have done the best I can to make them durable and of very good quality. If you are not happy with them after you receive them, please return them unused and I will refund your complete purchase price less shipping. You be the judge.
Attached Thumbnails
Click image for larger version

Name:	Mechanum Vectorr 1.jpg
Views:	288
Size:	47.8 KB
ID:	3744  Click image for larger version

Name:	Mechanum Vectorr 2.jpg
Views:	580
Size:	50.6 KB
ID:	3745  

Last edited by NeilR : 28-12-2005 at 20:35.
  #5   Spotlight this post!  
Unread 28-12-2005, 20:36
Richard Wallace's Avatar
Richard Wallace Richard Wallace is offline
I live for the details.
FRC #3620 (Average Joes)
Team Role: Engineer
 
Join Date: Jan 2003
Rookie Year: 1996
Location: Southwestern Michigan
Posts: 3,658
Richard Wallace has a reputation beyond reputeRichard Wallace has a reputation beyond reputeRichard Wallace has a reputation beyond reputeRichard Wallace has a reputation beyond reputeRichard Wallace has a reputation beyond reputeRichard Wallace has a reputation beyond reputeRichard Wallace has a reputation beyond reputeRichard Wallace has a reputation beyond reputeRichard Wallace has a reputation beyond reputeRichard Wallace has a reputation beyond reputeRichard Wallace has a reputation beyond repute
Re: Mecanum Wheels

Quote:
Originally Posted by NeilR
Hi all;

Over the past two years I have developed and built an 8" Mechanum (Mecanum?) wheel that I am finally in a position to provide to a limited number of FIRST teams. [...]
Neil Rosenberg

P.S. I've only got enough for 25 sets, first come first serve!

P.P.S. I offer no warranty either expressed or implied. I have done the best I can to make them durable and of very good quality. If you are not happy with them after you receive them, please return them unused and I will refund your complete purchase price less shipping. You be the judge.
Wow, Neil! These are some sweet looking wheels.

Just a caution to folks considering Neil's limited supply offer: under <R36> in the 2005 FRC Robot Rules, Neil's wheels would not be allowed because he cannot supply all teams at the same price. You could still use the design if you fabricated them yourself and accounted for the cost correctly. Of course, <R36> may not be the same in the 2006 rules.
__________________
Richard Wallace

Mentor since 2011 for FRC 3620 Average Joes (St. Joseph, Michigan)
Mentor 2002-10 for FRC 931 Perpetual Chaos (St. Louis, Missouri)
since 2003

I believe in intuition and inspiration. Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution. It is, strictly speaking, a real factor in scientific research.
(Cosmic Religion : With Other Opinions and Aphorisms (1931) by Albert Einstein, p. 97)
  #6   Spotlight this post!  
Unread 28-12-2005, 20:42
NeilR NeilR is offline
Adjunct Lecturer, UNC Asheville
FRC #3971 (Kai Orbus)
Team Role: Mentor
 
Join Date: Dec 2005
Rookie Year: 2002
Location: Asheville, NC
Posts: 6
NeilR is on a distinguished road
Re: Mecanum Wheels

Hi, and thanks for the feedback.

We'll have to let the "rules" gods figure this out. I'm happy to provide them at the same price to all teams, I just don't have an infinite supply. I'd rather be up-front about it than disappoint someone later.

Neil

Last edited by NeilR : 28-12-2005 at 21:17.
  #7   Spotlight this post!  
Unread 28-12-2005, 23:00
Alan Anderson's Avatar
Alan Anderson Alan Anderson is offline
Software Architect
FRC #0045 (TechnoKats)
Team Role: Mentor
 
Join Date: Feb 2004
Rookie Year: 2004
Location: Kokomo, Indiana
Posts: 9,113
Alan Anderson has a reputation beyond reputeAlan Anderson has a reputation beyond reputeAlan Anderson has a reputation beyond reputeAlan Anderson has a reputation beyond reputeAlan Anderson has a reputation beyond reputeAlan Anderson has a reputation beyond reputeAlan Anderson has a reputation beyond reputeAlan Anderson has a reputation beyond reputeAlan Anderson has a reputation beyond reputeAlan Anderson has a reputation beyond reputeAlan Anderson has a reputation beyond repute
Re: Mecanum Wheels

Quote:
Originally Posted by Richard
Just a caution to folks considering Neil's limited supply offer: under <R36> in the 2005 FRC Robot Rules, Neil's wheels would not be allowed because he cannot supply all teams at the same price. You could still use the design if you fabricated them yourself and accounted for the cost correctly. Of course, <R36> may not be the same in the 2006 rules.
And, of course, the rule only applies to a robot that will be used in a FIRST competition. Nobody can penalize you for putting those wheels on a non-competition 'bot if you want to make something to play around and practice with.
  #8   Spotlight this post!  
Unread 16-01-2006, 09:10
NeilR NeilR is offline
Adjunct Lecturer, UNC Asheville
FRC #3971 (Kai Orbus)
Team Role: Mentor
 
Join Date: Dec 2005
Rookie Year: 2002
Location: Asheville, NC
Posts: 6
NeilR is on a distinguished road
Lightbulb Re: Mecanum Wheels

OK, here's the "new" situation. FIRST has discussed the matter and the decision is that I can't sell the wheels this year (not enough supply). So, here's my offer.

I will gladly donate a set of wheels (4 plus a spare) to the first 10 teams that request it. No charge, but you pay the freight. In effect I'll be a sponsor to your team.

Don't ask for them unless you're serious about using them. Yes, you can modify them in any way you desire, such as to change the bore, get rid of weight, etc.

Contact me via email at Neil@vectorr.com

My gift to FIRST.

Neil
  #9   Spotlight this post!  
Unread 16-01-2006, 09:23
Richard Wallace's Avatar
Richard Wallace Richard Wallace is offline
I live for the details.
FRC #3620 (Average Joes)
Team Role: Engineer
 
Join Date: Jan 2003
Rookie Year: 1996
Location: Southwestern Michigan
Posts: 3,658
Richard Wallace has a reputation beyond reputeRichard Wallace has a reputation beyond reputeRichard Wallace has a reputation beyond reputeRichard Wallace has a reputation beyond reputeRichard Wallace has a reputation beyond reputeRichard Wallace has a reputation beyond reputeRichard Wallace has a reputation beyond reputeRichard Wallace has a reputation beyond reputeRichard Wallace has a reputation beyond reputeRichard Wallace has a reputation beyond reputeRichard Wallace has a reputation beyond repute
Re: Mecanum Wheels

What a great offer, Neil!

I hope we will be seeing your wheels on some FRC robots this year, and even more next year.
__________________
Richard Wallace

Mentor since 2011 for FRC 3620 Average Joes (St. Joseph, Michigan)
Mentor 2002-10 for FRC 931 Perpetual Chaos (St. Louis, Missouri)
since 2003

I believe in intuition and inspiration. Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution. It is, strictly speaking, a real factor in scientific research.
(Cosmic Religion : With Other Opinions and Aphorisms (1931) by Albert Einstein, p. 97)
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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Improved Mecanum Wheels techtiger1 Technical Discussion 23 08-10-2005 01:02
Teams With Mecanum Wheels Foss@Team176 Technical Discussion 15 06-10-2005 09:38
Lots of Wheels and F = u x N archiver 2001 17 23-06-2002 23:37
"Motors and Drive train edition" of Fresh From the Forum Ken Leung CD Forum Support 6 29-01-2002 12:32


All times are GMT -5. The time now is 20:44.

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