Go to Post A mentor, by definition, provides a nuturing environment and, over time, makes themselves progressively unnecessary. - Rich Kressly [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

 
 
 
Thread Tools Rate Thread Display Modes
Prev Previous Post   Next Post Next
  #42   Spotlight this post!  
Unread 06-02-2008, 18:48
LieAfterLie's Avatar
LieAfterLie LieAfterLie is offline
Registered User
FRC #2028
Team Role: Programmer
 
Join Date: Jan 2007
Rookie Year: 2007
Location: Hampton, VA
Posts: 35
LieAfterLie is an unknown quantity at this point
Re: mecanum vs. omni

The forces are the same for omnis and mecanums. The programming is exactly identical, as an omni setup and a mecanum setup with the wheels in the same spot in the corners would turn the motors on and off exactly the same amount of time, and the same outputs. The vectors of mecanums in the same spot are diagonal just like the omnis, and are 100% of the omni's diagonal forces.

Theoretically, they're completely the same, just with different motor/wheel angles and thus different mounting. But like is stated earlier, mecanums' 45 degree wheel/motor angle causes lateral force on the bearings, but can be more easily switched with normal wheels.

The rollers themselves hit the ground at the same angle, push in the same direction, and with the same force. They're both just as efficient, neither moves slower. They both push with 71% force forward/backward and left/right, and 100% at a 45 degree angle. You only use two of your motors diagonally though (mecanum or omni) so you go 41% faster fwd/back/sideways.

Because the forces are the same, the two have theoretically the same traction if they use the same roller material and size and wheel diameter and number of rollers and both have circular profiles and all of that.
__________________
SEMPER UBI SUB UBI

Last edited by LieAfterLie : 06-02-2008 at 18:52.
 


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
Mecanum Defense MAteo9944 Rules/Strategy 20 04-04-2007 17:33
Friction coefficients for Omni wheels and Mecanum wheels from AndyMark Andy Baker Technical Discussion 11 16-12-2006 19:40
Mecanum Rob2713g Technical Discussion 13 03-11-2006 14:16
Omni Silent_Stryker Championship Event 4 21-04-2006 20:24
omni wheel instead of mecanum wheels Leav Technical Discussion 4 15-01-2006 18:53


All times are GMT -5. The time now is 13:32.

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