Go to Post I'm sure you can come up with something, with a bit of warped thought! ... and if not, warped thinking is what your team's Engineers are for! :) - kmcclary [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 15-01-2010, 18:29
wolvesrobo wolvesrobo is offline
Registered User
FRC #1780
 
Join Date: Jan 2010
Location: nevada
Posts: 10
wolvesrobo is an unknown quantity at this point
omni wheels or 6 wheels???

so my team is debating wether to use 4 omni wheels or to use 6 wheels and to of the wheels are lifted up and sticky to help over the bumb and the other 4 are the slick wheels. any thoughts or comments please help
  #2   Spotlight this post!  
Unread 16-01-2010, 10:40
Hito Seika's Avatar
Hito Seika Hito Seika is offline
aka Garrett
FRC #1225 (Amperage Roboticcs)
Team Role: Engineer
 
Join Date: Jan 2008
Rookie Year: 2007
Location: Hendersonville,NC
Posts: 28
Hito Seika is infamous around these partsHito Seika is infamous around these partsHito Seika is infamous around these partsHito Seika is infamous around these parts
Re: omni wheels or 6 wheels???

6 wheels is what we are thinking. we should testing it today
__________________
Sorry about my spelling ….I’m a horrible speller
  #3   Spotlight this post!  
Unread 16-01-2010, 11:12
ChaosX73 ChaosX73 is offline
Registered User
AKA: Ryan Harrison
FRC #2338 (Gear it Forward)
Team Role: Programmer
 
Join Date: Jan 2009
Rookie Year: 2009
Location: Aurora, IL
Posts: 75
ChaosX73 is a glorious beacon of lightChaosX73 is a glorious beacon of lightChaosX73 is a glorious beacon of lightChaosX73 is a glorious beacon of lightChaosX73 is a glorious beacon of light
Re: omni wheels or 6 wheels???

Some people on my team had thought of that idea also. I think it would be a great idea to implement, seeing that at the kickoff it showed that the slippery wheels can get you at least half of the way up the ramp. I'm sure that everyone has thought of using that though, so if you do use it, you probably won't be the only team with that system.

My team is planning on using swerve drive, though from what we saw with our holonomic prototype, I'd say that one is worth doing more.
  #4   Spotlight this post!  
Unread 16-01-2010, 11:26
Chris is me's Avatar
Chris is me Chris is me is offline
no bag, vex only, final destination
AKA: Pinecone
FRC #0228 (GUS Robotics); FRC #2170 (Titanium Tomahawks)
Team Role: Mentor
 
Join Date: Dec 2008
Rookie Year: 2006
Location: Glastonbury, CT
Posts: 7,712
Chris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond repute
Send a message via AIM to Chris is me
Re: omni wheels or 6 wheels???

Prototype, prototype, prototype. Every drive system has pros and cons.

I'll give you a tip though: In a six wheel drive, you want the center wheels to have the most traction.
__________________
Mentor / Drive Coach: 228 (2016-?)
...2016 Waterbury SFs (with 3314, 3719), RIDE #2 Seed / Winners (with 1058, 6153), Carver QFs (with 503, 359, 4607)
Mentor / Consultant Person: 2170 (2017-?)
---
College Mentor: 2791 (2010-2015)
...2015 TVR Motorola Quality, FLR GM Industrial Design
...2014 FLR Motorola Quality / SFs (with 341, 4930)
...2013 BAE Motorola Quality, WPI Regional #1 Seed / Delphi Excellence in Engineering / Finalists (with 20, 3182)
...2012 BAE Imagery / Finalists (with 1519, 885), CT Xerox Creativity / SFs (with 2168, 118)
Student: 1714 (2009) - 2009 Minnesota 10,000 Lakes Regional Winners (with 2826, 2470)
2791 Build Season Photo Gallery - Look here for mechanism photos My Robotics Blog (Updated April 11 2014)
  #5   Spotlight this post!  
Unread 16-01-2010, 12:41
MFennig8's Avatar
MFennig8 MFennig8 is offline
Da' Bears
AKA: Fennig
FRC #0247 (Da' Bears)
Team Role: Driver
 
Join Date: Apr 2006
Rookie Year: 2002
Location: Berkley, MI
Posts: 27
MFennig8 is infamous around these parts
Send a message via AIM to MFennig8
Re: omni wheels or 6 wheels???

Our team is doing both. 6 wheels on 4 drive motors. All the drive motors run off the middle 2 traction wheels, and each traction wheel is connected to 2 omni wheels. Literally doing a tank drive with 4 omni corner wheels and 2 traction wheels.
__________________

2009:
World Championship Finalist
Curie Division Champion
Michigan State Championship Finalist
Traverse City - Chairman's Award
Traverse City District Champion
Cass Tech - Kleiner Perkins Caufield and Byers Entrepreneurship Award
Website Excellence Award
Team Ford FIRST Winter Event Imagery Award *
Team Ford FIRST Winter Event Chairman’s Award*

2008:
Greater Toronto Regional Finalist
Detroit - Chrysler Team Spirit Award
Toronto - Motorola Quality Award
Web Site Excellence Award

2007:
Detroit Regional Winners Thanks Team 123 and 903
Best Website Award (Detroit)
Engineering Inspiration Award (Detroit)
Pittsburgh Regional Winners Thanks 123 and 337
Kleiner Perkins Caufield and Byers Entrepenurship Award (Pittsburgh)
Autodesk Visualtization Award (Pittsburgh)

2006:
Palmetto Regional Winners Thanks Team 11 and 1251 (Mort, Tigers, Bears...OO MY!)



Mentor
  #6   Spotlight this post!  
Unread 16-01-2010, 18:32
Hito Seika's Avatar
Hito Seika Hito Seika is offline
aka Garrett
FRC #1225 (Amperage Roboticcs)
Team Role: Engineer
 
Join Date: Jan 2008
Rookie Year: 2007
Location: Hendersonville,NC
Posts: 28
Hito Seika is infamous around these partsHito Seika is infamous around these partsHito Seika is infamous around these partsHito Seika is infamous around these parts
Re: omni wheels or 6 wheels???

Quote:
Prototype, prototype, prototype. Every drive system has pros and cons.

I'll give you a tip though: In a six wheel drive, you want the center wheels to have the most traction.

yep we already fingered that out. now the question is if it will work?
__________________
Sorry about my spelling ….I’m a horrible speller
  #7   Spotlight this post!  
Unread 16-01-2010, 18:36
Hito Seika's Avatar
Hito Seika Hito Seika is offline
aka Garrett
FRC #1225 (Amperage Roboticcs)
Team Role: Engineer
 
Join Date: Jan 2008
Rookie Year: 2007
Location: Hendersonville,NC
Posts: 28
Hito Seika is infamous around these partsHito Seika is infamous around these partsHito Seika is infamous around these partsHito Seika is infamous around these parts
Re: omni wheels or 6 wheels???

Quote:
Originally Posted by MFennig8 View Post
Our team is doing both. 6 wheels on 4 drive motors. All the drive motors run off the middle 2 traction wheels, and each traction wheel is connected to 2 omni wheels. Literally doing a tank drive with 4 omni corner wheels and 2 traction wheels.
we are doing a drop wheel
17 1/2" between back and center. and 12 between the center and the front.
__________________
Sorry about my spelling ….I’m a horrible speller
  #8   Spotlight this post!  
Unread 16-01-2010, 19:01
Dan 1038's Avatar
Dan 1038 Dan 1038 is offline
Team Leader
AKA: Dan Stauft
FRC #4740 (Spartan Robotics)
Team Role: Leadership
 
Join Date: Mar 2007
Rookie Year: 2005
Location: Smyrna, TN
Posts: 229
Dan 1038 has a reputation beyond reputeDan 1038 has a reputation beyond reputeDan 1038 has a reputation beyond reputeDan 1038 has a reputation beyond reputeDan 1038 has a reputation beyond reputeDan 1038 has a reputation beyond reputeDan 1038 has a reputation beyond reputeDan 1038 has a reputation beyond reputeDan 1038 has a reputation beyond reputeDan 1038 has a reputation beyond reputeDan 1038 has a reputation beyond repute
Re: omni wheels or 6 wheels???

My vote would be "C", none of the above. 4 Omnis won't climb the bumps robustly and can be pushed around by just about anything, 6 wheel drive will also have issues if your strategy involves crossing the bumps, as the middle set of wheels is where you might want some ground clearence going over the top. Now, that said, if your strategy is to simply own one zone and score/defend from there, I would pick the 6 wheel drive with the middle wheels dropped 1/4" or so to add maneuverability...that setup pushes and manuevers well on flat surfaces.
__________________
Dan

2011-Present
Founder & Team Lead, FRC Team 4740 - Spartabots, Nashville, TN
Founder, FRC Team 3945 - Cobrotics, Whites Creek, TN
Mentor, FRC Team 4306 - Robo Komodos, Franklin, TN

2005-2011
Mentor, FRC Team 1038 - Thunderhawks, Liberty Township, OH

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
Omni wheels? Mentor08 Technical Discussion 7 26-01-2008 21:48
caster wheels vs. omni wheels gondorf Kit & Additional Hardware 4 23-01-2008 22:45
Friction coefficients for Omni wheels and Mecanum wheels from AndyMark Andy Baker Technical Discussion 11 16-12-2006 19:40
Omni Wheels??? Alex Cormier General Forum 1 24-01-2004 18:00
Omni Wheels! jrgrim12 Technical Discussion 5 04-02-2003 16:07


All times are GMT -5. The time now is 20:43.

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