OCCRA
Go to Post When you and your friend consider dressing up as a Potentiometer and “magic smoke” for Halloween! - BX MARK [more]
Home
Go Back   Chief Delphi > ChiefDelphi.com Website > Extra Discussion
CD-Events   CD-Media   CD-Spy   FRC-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
Reply
Thread Tools Rate Thread Display Modes
  #1   Spotlight this post!  
Unread 09-03-2008, 05:03 PM
sdcantrell56's Avatar
sdcantrell56 sdcantrell56 is offline
Registered User
AKA: Sean
FRC #2415 (Wired Cats)
Team Role: Mentor
 
Join Date: Jan 2006
Rookie Year: 2004
Location: Atlanta, GA
Posts: 1,017
sdcantrell56 has a reputation beyond reputesdcantrell56 has a reputation beyond reputesdcantrell56 has a reputation beyond reputesdcantrell56 has a reputation beyond reputesdcantrell56 has a reputation beyond reputesdcantrell56 has a reputation beyond reputesdcantrell56 has a reputation beyond reputesdcantrell56 has a reputation beyond reputesdcantrell56 has a reputation beyond reputesdcantrell56 has a reputation beyond reputesdcantrell56 has a reputation beyond repute
Send a message via Skype™ to sdcantrell56
pic: FR 1771 Drivetrain Revised

Reply With Quote
  #2   Spotlight this post!  
Unread 09-03-2008, 05:03 PM
Akash Rastogi Akash Rastogi is offline
Currently teamless
no team
Team Role: Alumni
 
Join Date: Feb 2007
Rookie Year: 2006
Location: Mt. Olive, NJ/ Syracuse, NY
Posts: 6,730
Akash Rastogi has a reputation beyond reputeAkash Rastogi has a reputation beyond reputeAkash Rastogi has a reputation beyond reputeAkash Rastogi has a reputation beyond reputeAkash Rastogi has a reputation beyond reputeAkash Rastogi has a reputation beyond reputeAkash Rastogi has a reputation beyond reputeAkash Rastogi has a reputation beyond reputeAkash Rastogi has a reputation beyond reputeAkash Rastogi has a reputation beyond reputeAkash Rastogi has a reputation beyond repute
Re: pic: FR 1771 Drivetrain Revised

Nice weight drop and design. Thinking about doing the same to parts of the sides?
__________________

Alumni/Mentor FRC 11 - MORT | ['11-'12]: Co-Founder/Mentor FRC 3929 | ['06-'10]: Student FRC 11- MORT | ['08-'12]: Founder - EWCP
Reply With Quote
  #3   Spotlight this post!  
Unread 09-03-2008, 05:24 PM
sdcantrell56's Avatar
sdcantrell56 sdcantrell56 is offline
Registered User
AKA: Sean
FRC #2415 (Wired Cats)
Team Role: Mentor
 
Join Date: Jan 2006
Rookie Year: 2004
Location: Atlanta, GA
Posts: 1,017
sdcantrell56 has a reputation beyond reputesdcantrell56 has a reputation beyond reputesdcantrell56 has a reputation beyond reputesdcantrell56 has a reputation beyond reputesdcantrell56 has a reputation beyond reputesdcantrell56 has a reputation beyond reputesdcantrell56 has a reputation beyond reputesdcantrell56 has a reputation beyond reputesdcantrell56 has a reputation beyond reputesdcantrell56 has a reputation beyond reputesdcantrell56 has a reputation beyond repute
Send a message via Skype™ to sdcantrell56
Re: pic: FR 1771 Drivetrain Revised

Im thinkin about it but i dont know for sure. It would really be something that depends on the manipulator and 28lbs is lighter than probably 90% of drivetrains in FIRST.
__________________

2012 Peachtree Regional Champs
2011 North Carolina Regional Champs
2011 Peachtree Regional Champs
Reply With Quote
  #4   Spotlight this post!  
Unread 09-03-2008, 05:34 PM
chris31 chris31 is offline
Team 2021 Captain
AKA: Chris Davidson
FRC #2021 (FA Robotics)
Team Role: Mentor
 
Join Date: Nov 2005
Rookie Year: 2006
Location: Atlanta, GA/ Fredericksburg,VA
Posts: 950
chris31 has a reputation beyond reputechris31 has a reputation beyond reputechris31 has a reputation beyond reputechris31 has a reputation beyond reputechris31 has a reputation beyond reputechris31 has a reputation beyond reputechris31 has a reputation beyond reputechris31 has a reputation beyond reputechris31 has a reputation beyond reputechris31 has a reputation beyond reputechris31 has a reputation beyond repute
Send a message via AIM to chris31 Send a message via Skype™ to chris31
Re: pic: FR 1771 Drivetrain Revised

Looks nice but also looks like alot of machining. Have you looked at how much you are gonna spend in machining costs/materials or is it all being student done or donated.
Reply With Quote
  #5   Spotlight this post!  
Unread 09-03-2008, 07:47 PM
R.C.'s Avatar
R.C. R.C. is online now
2014... Hella Parts
AKA: Owner, WestCoast Products
FRC #1323 (MadTown Robotics)
Team Role: Mentor
 
Join Date: Feb 2008
Rookie Year: 2006
Location: Madera, CA
Posts: 1,927
R.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond repute
Re: pic: FR 1771 Drivetrain Revised

Nice job, 28 pounds is fantastic!!!
__________________
R.C.
Owner, WestCoast Products || Twitter
MadTown Robotics Team 1323
Reply With Quote
  #6   Spotlight this post!  
Unread 09-03-2008, 08:01 PM
bmarick bmarick is offline
Registered User
FRC #2374 (Crusader Bots)
Team Role: Alumni
 
Join Date: Jan 2008
Rookie Year: 2007
Location: Jesuit
Posts: 44
bmarick is on a distinguished road
Re: pic: FR 1771 Drivetrain Revised

intresting design
I have to agree with the wiegt statement about it being lighter than most out there so that will be a great advantage.
But why did u go with belts?
Reply With Quote
  #7   Spotlight this post!  
Unread 09-03-2008, 08:05 PM
AdamHeard's Avatar
AdamHeard AdamHeard is offline
Lead Mentor
FRC #0973 (Greybots)
Team Role: Mentor
 
Join Date: Oct 2004
Rookie Year: 2004
Location: Cal Poly San Luis Obispo
Posts: 4,487
AdamHeard has a reputation beyond reputeAdamHeard has a reputation beyond reputeAdamHeard has a reputation beyond reputeAdamHeard has a reputation beyond reputeAdamHeard has a reputation beyond reputeAdamHeard has a reputation beyond reputeAdamHeard has a reputation beyond reputeAdamHeard has a reputation beyond reputeAdamHeard has a reputation beyond reputeAdamHeard has a reputation beyond reputeAdamHeard has a reputation beyond repute
Send a message via AIM to AdamHeard
Re: pic: FR 1771 Drivetrain Revised

Are you sure you are accounting for the weight of all fasteners, bearings, washers, belts, etc. correctly?
__________________
Need help? Check out 973 Remote Assistance and Mentorship Program.

Like us on Facebook!

2014 Galileo Champions
2011 World Champions

Like our Robots? Check out the CAD files of MOST of our robots!
Reply With Quote
  #8   Spotlight this post!  
Unread 09-03-2008, 08:26 PM
sdcantrell56's Avatar
sdcantrell56 sdcantrell56 is offline
Registered User
AKA: Sean
FRC #2415 (Wired Cats)
Team Role: Mentor
 
Join Date: Jan 2006
Rookie Year: 2004
Location: Atlanta, GA
Posts: 1,017
sdcantrell56 has a reputation beyond reputesdcantrell56 has a reputation beyond reputesdcantrell56 has a reputation beyond reputesdcantrell56 has a reputation beyond reputesdcantrell56 has a reputation beyond reputesdcantrell56 has a reputation beyond reputesdcantrell56 has a reputation beyond reputesdcantrell56 has a reputation beyond reputesdcantrell56 has a reputation beyond reputesdcantrell56 has a reputation beyond reputesdcantrell56 has a reputation beyond repute
Send a message via Skype™ to sdcantrell56
Re: pic: FR 1771 Drivetrain Revised

I am going with belts because they are the absolute lightest option, they are easy to deal with in this particular drivetrain, and the are simply cool. Also the tensioning method on this drivetrain is very good and will allow us to set the proper tension and keep it this way.

This drivetrain is kind of an extreme study in light weight as it is single speed and belt driven. I am finishing up a new 2 speed transmission using #25 chain and will post that one up when done. Altogether the 2 speed version will probably gain ~4lbs however that seems like a very good tradeoff for the added performance.

This does require a decent amount of machining however a lot of the machining can be done in large batches (wheels and bearing blocks) and the rest is not that much really. We are fortunate to have a couple machine shops that donate time to us so we can have things machined.

The weight calculation are completely correct minus the actual belt and I believe 12 bolts so yes it is very close and there is still more weight that can be removed. One of the huge weight savers is the UHMW wheels which should actually be more dent resistant than aluminum.

Finally this drivetrain is not necessarily what the team will decide on. It does require a substantial amount of machining; however, it is the most cut down and easiest drivetrain to maintain. Tensioning is accomplished by turning a bolt and wheels/tread can be changed in a matter of seconds. Particularly if bumpers are allowed again I will push people in this direction if we can accomplish the machining.

I must say I have admired 254/968 for a long time for their drivetrains being the absolute minimum necessary and functioning imo as good or better than all other forms. Thanks for the Inspiration teams 60/254/968
__________________

2012 Peachtree Regional Champs
2011 North Carolina Regional Champs
2011 Peachtree Regional Champs
Reply With Quote
Reply


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: FRC 1771 Drivetrain sdcantrell56 Extra Discussion 24 09-02-2008 04:05 PM
pic: 1771 drivetrain machining sdcantrell56 Extra Discussion 3 02-15-2008 04:26 PM
pic: 1771 drivetrain complete 2 sdcantrell56 Extra Discussion 4 01-11-2008 11:57 PM
pic: 2008 drivetrain 1771 sdcantrell56 Extra Discussion 9 01-10-2008 10:55 AM
pic: Revised Ball Shooter cleonavicius Robot Showcase 7 01-29-2006 04:26 PM


All times are GMT -5. The time now is 10:23 PM.

The Chief Delphi Forums are sponsored by Innovation First International, Inc.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi