Go to Post we learned that's what happens when you start building without even thinking about weight. next year, we'll lighten everything BEFORE we mount it. - greencactus3 [more]
Home
Go Back   Chief Delphi > FIRST > General Forum
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
  #16   Spotlight this post!  
Unread 04-10-2010, 13:26
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: Belt Drives

Quote:
Originally Posted by Chris is me View Post
Fun question: I've heard that belt drives never stretch. Does that mean if you CAD appropriately and use exactly the right belts, you don't need tensioners other than to more fully engage pulleys? I've seen photos of 1717 robots with belts used without tensioners before... Are they a requirement, or just nice to have?
Theoretically, yes, you should be able to design the distance between centers to a correct interval and end up with a belt without tensioners. However, the belt drives I've done have all ended up with tensioners. This was just to bulletproof the setup should anything change throughout the course of the season. The nice thing about these tensioners was they did not need to be variable. It was literally a piece of delrin turned to the correct diameter and placed over a standoff that was inline with the belt path. We had little issues with the belts with the tensioners in place. Post-season we ran without tensioners to test the setup and did end up failing a belt (sheered teeth) after 3 or 4 post season events. Luckily we had replacements at the ready and did a quick swap and reinstalled the tensioners.


I would say if your considering a belt setup, order some samples and just play with them yourselves. Use the fall to develop some kind of a prototype using belts. It doesn't need to be an entire drive system. Maybe even try to do some lifetime testing and see if they do stretch in your applicaation.

-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
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
Friction drives newbee General Forum 5 11-01-2009 20:32
Drives in general Gamerboyb1 Technical Discussion 26 12-11-2007 19:28
holonomic drives Max Lobovsky Technical Discussion 5 10-03-2004 21:31
Types of Drives? indieFan Technical Discussion 50 20-10-2003 12:27


All times are GMT -5. The time now is 06:48.

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