Go to Post Our robotics lab has been closed for two days, TWO DAYS! :ahh: - Kevin Selavko [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

 
 
 
Thread Tools Rate Thread Display Modes
Prev Previous Post   Next Post Next
  #23   Spotlight this post!  
Unread 10-09-2006, 20:17
Madison's Avatar
Madison Madison is offline
Dancing through life...
FRC #0488 (Xbot)
Team Role: Engineer
 
Join Date: Jun 2001
Rookie Year: 1999
Location: Seattle, WA
Posts: 5,243
Madison has a reputation beyond reputeMadison has a reputation beyond reputeMadison has a reputation beyond reputeMadison has a reputation beyond reputeMadison has a reputation beyond reputeMadison has a reputation beyond reputeMadison has a reputation beyond reputeMadison has a reputation beyond reputeMadison has a reputation beyond reputeMadison has a reputation beyond reputeMadison has a reputation beyond repute
Re: pic: Practice Mecanum Chassis

Quote:
Originally Posted by Mike Nawrot
Perhaps you can save some trouble by integrating the gearbox into the inner plate of the mecanum assy, and replace the sprocket with a gear, to eliminate the issue of tension all together. I don't know what capabilities your team has when it comes to milling out excess material in the gears, but if worst comes to worst, you can design a nice lightweight gear and outsource it to sdp-si. I'm not a fan of outsourcing in FIRST, but in the real world, outsourcing is useful, and if you don't have the machining capabilities, you have no other option. It's a very nicely designed module. Keep up the good work.
I considered this and decided against it because I'd like some ability to play with and vary the final drivetrain ratio. Changing sprockets and adjusting tension allows this to happen pretty quickly and painlessly.

The latest iteration follows; and please note that I'm dissatisfied with how ugly the gearboxes are.


I neglected to color the pivot in this shot, but it's the long 3/8" bolt sticking out from near the middle of the image. The blue represents chain -- #25 this time around rather than #35 helps to achieve some tighter clearances.

The ratio as shown is 12:40 in the gears and 18:72 through the sprockets for an overall ratio of 13.32:1. I'm pretty confident this will be on par with or lighter than the kit gearbox arrangement that provides a similar 12.75:1 output.
__________________
--Madison--

...down at the Ozdust!

Like a grand and miraculous spaceship, our planet has sailed through the universe of time. And for a brief moment, we have been among its many passengers.
Reply With Quote
 


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: Mecanum Wheel Project - Rev. E Madison Technical Discussion 8 13-07-2006 13:31
pic: 2" Mecanum Wheel Tytus Gerrish Technical Discussion 17 22-04-2006 12:22
pic: Easy to make mecanum wheels mechanicalbrain Extra Discussion 15 06-10-2005 21:37
pic: 1" mecanum Tytus Gerrish Extra Discussion 8 04-10-2005 13:44
pic: Micro Mecanum wheel Tytus Gerrish Extra Discussion 6 12-05-2005 23:20


All times are GMT -5. The time now is 07:22.

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