OCCRA
Go to Post Yay for teaching how to fish! - RoboMom [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 04-06-2008, 12:11 AM
Richard McClellan's Avatar
Richard McClellan Richard McClellan is offline
Engineering Mentor
FRC #0254 (Cheesy Poofs)
Team Role: Mentor
 
Join Date: May 2004
Rookie Year: 2004
Location: Palo Alto, CA
Posts: 322
Richard McClellan has much to be proud ofRichard McClellan has much to be proud ofRichard McClellan has much to be proud ofRichard McClellan has much to be proud ofRichard McClellan has much to be proud ofRichard McClellan has much to be proud ofRichard McClellan has much to be proud ofRichard McClellan has much to be proud ofRichard McClellan has much to be proud ofRichard McClellan has much to be proud of
Send a message via AIM to Richard McClellan
pic: Problem with IFI Wheels

Reply With Quote
  #2   Spotlight this post!  
Unread 04-06-2008, 12:14 AM
BornaE's Avatar
BornaE BornaE is offline
2009 Control System Beta Test Team
FRC #0842 (Formerly 39)
Team Role: Engineer
 
Join Date: Jan 2007
Rookie Year: 2007
Location: Gilbert, Arizona
Posts: 354
BornaE has a brilliant futureBornaE has a brilliant futureBornaE has a brilliant futureBornaE has a brilliant futureBornaE has a brilliant futureBornaE has a brilliant futureBornaE has a brilliant futureBornaE has a brilliant futureBornaE has a brilliant futureBornaE has a brilliant futureBornaE has a brilliant future
Send a message via Skype™ to BornaE
Re: pic: Problem with IFI Wheels

This happened to one of our drive wheels as well.
Seems like 5052 is not durable enough to take the load.
If IFI uses 6061 the wheel would work much better.
__________________
-Borna Emami
Team 0x27

Last edited by BornaE : 04-06-2008 at 12:18 AM.
Reply With Quote
  #3   Spotlight this post!  
Unread 04-06-2008, 12:14 AM
MrForbes's Avatar
MrForbes MrForbes is offline
Registered User
AKA: Jim
FRC #1726 (N.E.R.D.S.)
Team Role: Mentor
 
Join Date: Feb 2006
Rookie Year: 2006
Location: Sierra Vista AZ
Posts: 5,073
MrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond repute
Re: pic: Problem with IFI Wheels

How were the 3 screws around the bearing installed? Did you have the plastic washers between the screw heads, and the side plate?
Reply With Quote
  #4   Spotlight this post!  
Unread 04-06-2008, 12:20 AM
BornaE's Avatar
BornaE BornaE is offline
2009 Control System Beta Test Team
FRC #0842 (Formerly 39)
Team Role: Engineer
 
Join Date: Jan 2007
Rookie Year: 2007
Location: Gilbert, Arizona
Posts: 354
BornaE has a brilliant futureBornaE has a brilliant futureBornaE has a brilliant futureBornaE has a brilliant futureBornaE has a brilliant futureBornaE has a brilliant futureBornaE has a brilliant futureBornaE has a brilliant futureBornaE has a brilliant futureBornaE has a brilliant futureBornaE has a brilliant future
Send a message via Skype™ to BornaE
Re: pic: Problem with IFI Wheels

Quote:
Originally Posted by squirrel View Post
How were the 3 screws around the bearing installed? Did you have the plastic washers between the screw heads, and the side plate?
We did
__________________
-Borna Emami
Team 0x27
Reply With Quote
  #5   Spotlight this post!  
Unread 04-06-2008, 12:30 AM
RogerR's Avatar
RogerR RogerR is online now
its spelled *ya'll*, not *y'all*
AKA: Roger Riquelme
FRC #3259 (Thoroughbots)
Team Role: Teacher
 
Join Date: Feb 2003
Rookie Year: 2001
Location: Somerset, KY
Posts: 904
RogerR has a reputation beyond reputeRogerR has a reputation beyond reputeRogerR has a reputation beyond reputeRogerR has a reputation beyond reputeRogerR has a reputation beyond reputeRogerR has a reputation beyond reputeRogerR has a reputation beyond reputeRogerR has a reputation beyond reputeRogerR has a reputation beyond reputeRogerR has a reputation beyond reputeRogerR has a reputation beyond repute
Send a message via AIM to RogerR Send a message via MSN to RogerR
Re: pic: Problem with IFI Wheels

Quote:
Originally Posted by richardmcc2 View Post
did you press a bearing into the sprocket itself?
__________________
AIM: badhabit1369

"But to say that the race is a metaphor for life is to miss the point. The race is everything. It obliterates whatever isn't racing. Life is a metaphor for the race." -- Donald Antrim
Reply With Quote
  #6   Spotlight this post!  
Unread 04-06-2008, 02:58 AM
artdutra04's Avatar
artdutra04 artdutra04 is offline
VEX Robotics Engineer
AKA: Arthur Dutra IV; NERD #18
FRC #0148 (Robowranglers)
Team Role: Engineer
 
Join Date: Mar 2005
Rookie Year: 2002
Location: Greenville, TX
Posts: 3,025
artdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond repute
Re: pic: Problem with IFI Wheels

Quote:
Originally Posted by 0705920 View Post
This happened to one of our drive wheels as well.
Seems like 5052 is not durable enough to take the load.
If IFI uses 6061 the wheel would work much better.
Since IFI produces a lot of their their aluminum products using CNC sheet metal fabrication machinery, it would not make sense to use 6061.

5052 (along with many of the 5xxx grades of aluminum) are much better suited for CNC turret/punch and bending machines than 6061, which is less malleable and more prone to cracking during cold rolling operations.

You can't do much cold bending of 6061 and hope to achieve a bend radius equal to the thickness of the material, which is possible with several different 5xxx grade aluminum up to about 0.125" thick.
__________________
Art Dutra IV
Robotics Engineer, VEX Robotics, Inc., a subsidiary of Innovation First International (IFI)
Robowranglers Team 148 | GUS Robotics Team 228 (Alumni) | Rho Beta Epsilon (Alumni) | @arthurdutra

世上无难事,只怕有心人.
Reply With Quote
  #7   Spotlight this post!  
Unread 04-06-2008, 09:36 AM
JesseK's Avatar
JesseK JesseK is offline
Flybotix Fanatic
FRC #1885 (iLITE)
Team Role: Mentor
 
Join Date: Mar 2007
Rookie Year: 2005
Location: Reston, VA
Posts: 2,871
JesseK has a reputation beyond reputeJesseK has a reputation beyond reputeJesseK has a reputation beyond reputeJesseK has a reputation beyond reputeJesseK has a reputation beyond reputeJesseK has a reputation beyond reputeJesseK has a reputation beyond reputeJesseK has a reputation beyond reputeJesseK has a reputation beyond reputeJesseK has a reputation beyond reputeJesseK has a reputation beyond repute
Re: pic: Problem with IFI Wheels

Was the sprocket itself supported by a bearing or the axle? We're using 6" IFI wheels and the flat AM aluminum sprockets. The sprockets have a bearing pressed into them and are bolted into the pattern on the IFI wheel (who woulda known they use the SAME bolt pattern?!). We also are using 1/8" plastic spacers between the wheel and sprocket on each of the 6 bolts. We've had some tug of wars and a bit of side bumping in matches but have yet to see a problem.
Reply With Quote
  #8   Spotlight this post!  
Unread 04-06-2008, 09:49 AM
Tom Line's Avatar
Tom Line Tom Line is offline
Raptors can't turn doorknobs.
FRC #1718 (The Fighting Pi)
Team Role: Mentor
 
Join Date: Jan 2007
Rookie Year: 1999
Location: Armada, Michigan
Posts: 2,140
Tom Line has a reputation beyond reputeTom Line has a reputation beyond reputeTom Line has a reputation beyond reputeTom Line has a reputation beyond reputeTom Line has a reputation beyond reputeTom Line has a reputation beyond reputeTom Line has a reputation beyond reputeTom Line has a reputation beyond reputeTom Line has a reputation beyond reputeTom Line has a reputation beyond reputeTom Line has a reputation beyond repute
Re: pic: Problem with IFI Wheels

Many, many thousands of IFI wheels have been sold. I have not heard of many complaints.

We've run probably 20 of the wheels without any problems at all. Many of them are multiple-season use.

I'm curious - were you using chain? If so, what gauge? Was the chain aligned properly from front to back - i.e. was it perfectly perpendicular to the shaft the wheel was running on, or was it pulling at an angle? How tight did you have it?
Reply With Quote
  #9   Spotlight this post!  
Unread 04-06-2008, 10:08 AM
bigbeezy's Avatar
bigbeezy bigbeezy is offline
Registered User
AKA: Bryan
FRC #2338 (Gear it Forward)
Team Role: Coach
 
Join Date: Dec 2006
Rookie Year: 2005
Location: Oswego, IL
Posts: 214
bigbeezy is a splendid one to beholdbigbeezy is a splendid one to beholdbigbeezy is a splendid one to beholdbigbeezy is a splendid one to beholdbigbeezy is a splendid one to beholdbigbeezy is a splendid one to beholdbigbeezy is a splendid one to behold
Send a message via AIM to bigbeezy
Re: pic: Problem with IFI Wheels

We had the same problems in 2006 when we used them... After Florida that year we made nylon bearings that fit inside the wheel and spanned the entire width of the wheel. These worked well and we didnt have any more problems with the bearings buring the next 2 competitions.

We don't use these wheels any more. For something like $60 each I would expect something far stronger, especially since it was designed for FRC teams.


Also, we found that the IFI sprockets were too thin for #35 chain which allowed for slop made it easier for the chain to pop off.

I have seen a number of teams that use these wheels and never have a problem, but i have also seen an equal number that have had problems with them.
__________________


Driver -- Team 1592 Bionic Tigers -- 2005-2008
Mentor -- Team 2338 Gear it Forward -- 2013-

Last edited by bigbeezy : 04-06-2008 at 10:46 AM.
Reply With Quote
  #10   Spotlight this post!  
Unread 04-06-2008, 10:17 AM
Josh Murphy's Avatar
Josh Murphy Josh Murphy is offline
Registered User
AKA: Josh
FRC #0051 (Wings of Fire)
Team Role: Coach
 
Join Date: Feb 2005
Rookie Year: 2004
Location: Clarkston, Mi
Posts: 401
Josh Murphy has a reputation beyond reputeJosh Murphy has a reputation beyond reputeJosh Murphy has a reputation beyond reputeJosh Murphy has a reputation beyond reputeJosh Murphy has a reputation beyond reputeJosh Murphy has a reputation beyond reputeJosh Murphy has a reputation beyond reputeJosh Murphy has a reputation beyond reputeJosh Murphy has a reputation beyond reputeJosh Murphy has a reputation beyond reputeJosh Murphy has a reputation beyond repute
Re: pic: Problem with IFI Wheels

We've been using them for 2 years now and we have never had any problems with them. We have a practice robot that gets driven to death and we have one yet to fail. I personally like these wheels and I would use them again, IFI has a good product.
__________________
-Josh Murphy-
Reply With Quote
  #11   Spotlight this post!  
Unread 04-06-2008, 11:31 AM
Richard McClellan's Avatar
Richard McClellan Richard McClellan is offline
Engineering Mentor
FRC #0254 (Cheesy Poofs)
Team Role: Mentor
 
Join Date: May 2004
Rookie Year: 2004
Location: Palo Alto, CA
Posts: 322
Richard McClellan has much to be proud ofRichard McClellan has much to be proud ofRichard McClellan has much to be proud ofRichard McClellan has much to be proud ofRichard McClellan has much to be proud ofRichard McClellan has much to be proud ofRichard McClellan has much to be proud ofRichard McClellan has much to be proud ofRichard McClellan has much to be proud ofRichard McClellan has much to be proud of
Send a message via AIM to Richard McClellan
Re: pic: Problem with IFI Wheels

Quote:
Originally Posted by squirrel View Post
How were the 3 screws around the bearing installed? Did you have the plastic washers between the screw heads, and the side plate?
Yes.

Quote:
Originally Posted by RogerR View Post
did you press a bearing into the sprocket itself?
No, but this sounds like a very good idea, never thought about that. Maybe we will try this next year.

Quote:
Originally Posted by Tom Line View Post
Many, many thousands of IFI wheels have been sold. I have not heard of many complaints.

We've run probably 20 of the wheels without any problems at all. Many of them are multiple-season use.

I'm curious - were you using chain? If so, what gauge? Was the chain aligned properly from front to back - i.e. was it perfectly perpendicular to the shaft the wheel was running on, or was it pulling at an angle? How tight did you have it?
We were using #25 chain and it was aligned from front to back fairly well, and was pulling perpendicular to the shaft until the wheel started to deform. Once the wheel was wobbling though, the chain just popped right off. It did have a fairly good amount of tension in it as well.
__________________
~ Richard McClellan ~
Former Student on 1477 | Northside Roboteers | 2004-2005
Former Lead Mentor for 2158 | ausTIN CANs | 2007-2010
Current Mentor for 254 | Cheesy Poofs | 2013

Last edited by Richard McClellan : 04-06-2008 at 11:32 AM. Reason: added last sentence
Reply With Quote
  #12   Spotlight this post!  
Unread 04-06-2008, 12:58 PM
Aren_Hill's Avatar
Aren_Hill Aren_Hill is offline
VEXpro Engineer
FRC #0148 (Robowranglers)
Team Role: Mentor
 
Join Date: Feb 2005
Rookie Year: 2005
Location: Greenville, TX
Posts: 1,132
Aren_Hill has a reputation beyond reputeAren_Hill has a reputation beyond reputeAren_Hill has a reputation beyond reputeAren_Hill has a reputation beyond reputeAren_Hill has a reputation beyond reputeAren_Hill has a reputation beyond reputeAren_Hill has a reputation beyond reputeAren_Hill has a reputation beyond reputeAren_Hill has a reputation beyond reputeAren_Hill has a reputation beyond reputeAren_Hill has a reputation beyond repute
Re: pic: Problem with IFI Wheels

Quote:
Originally Posted by richardmcc2 View Post
Yes.


No, but this sounds like a very good idea, never thought about that. Maybe we will try this next year.


We were using #25 chain and it was aligned from front to back fairly well, and was pulling perpendicular to the shaft until the wheel started to deform. Once the wheel was wobbling though, the chain just popped right off. It did have a fairly good amount of tension in it as well.
so wait...how many bearings did you have between the wheel and the axle? because with 2 bearings supporting it i don't think this situation has a likelihood of occurring.
__________________
VEXpro questions? Email me at Prosupport "@" VEX.com

VEX Robotics Mechanical Engineer

1625 (2005-2011)
3928 (2012-2013)
148 (2013-?)
Reply With Quote
  #13   Spotlight this post!  
Unread 04-06-2008, 03:00 PM
Richard McClellan's Avatar
Richard McClellan Richard McClellan is offline
Engineering Mentor
FRC #0254 (Cheesy Poofs)
Team Role: Mentor
 
Join Date: May 2004
Rookie Year: 2004
Location: Palo Alto, CA
Posts: 322
Richard McClellan has much to be proud ofRichard McClellan has much to be proud ofRichard McClellan has much to be proud ofRichard McClellan has much to be proud ofRichard McClellan has much to be proud ofRichard McClellan has much to be proud ofRichard McClellan has much to be proud ofRichard McClellan has much to be proud ofRichard McClellan has much to be proud ofRichard McClellan has much to be proud of
Send a message via AIM to Richard McClellan
Re: pic: Problem with IFI Wheels

We had two bearings - one on each side of the wheel itself, and yes, it did still happen. I think if we had had a 3rd bearing (like suggested above) on the sprocket itself, it could have solved our problem.
__________________
~ Richard McClellan ~
Former Student on 1477 | Northside Roboteers | 2004-2005
Former Lead Mentor for 2158 | ausTIN CANs | 2007-2010
Current Mentor for 254 | Cheesy Poofs | 2013
Reply With Quote
  #14   Spotlight this post!  
Unread 04-06-2008, 03:10 PM
Stephen Kowski's Avatar
Stephen Kowski Stephen Kowski is offline
BSEE, MSEE, JD in progress
AKA: employed
no team
Team Role: Engineer
 
Join Date: Jun 2001
Rookie Year: 2000
Location: Saint Petersburg, FL
Posts: 1,140
Stephen Kowski has a reputation beyond reputeStephen Kowski has a reputation beyond reputeStephen Kowski has a reputation beyond reputeStephen Kowski has a reputation beyond reputeStephen Kowski has a reputation beyond reputeStephen Kowski has a reputation beyond reputeStephen Kowski has a reputation beyond reputeStephen Kowski has a reputation beyond reputeStephen Kowski has a reputation beyond reputeStephen Kowski has a reputation beyond reputeStephen Kowski has a reputation beyond repute
Send a message via AIM to Stephen Kowski Send a message via Skype™ to Stephen Kowski
Re: pic: Problem with IFI Wheels

Quote:
Originally Posted by richardmcc2 View Post
No, but this sounds like a very good idea, never thought about that. Maybe we will try this next year.
It is a great idea, IT WILL KEEP THIS PROBLEM FROM EVER HAPPENING!!!

PLEASE TEAMS, PRESS A BEARING INTO THE SPROCKET!! (sorry for the caps I have to tell at least one team a year this, three this year)

I'm not suggesting that this might fix your problem, this WILL ELIMINATE THIS ISSUE (THIS IS NOT JUST FOR IFI WHEELS EITHER) skyways, AndyMark, colson....if you are bolting a plate sprocket to the wheel with some kind of spacer in between those two elements you should spend the dollar or whatever for the extra bearing for the sprocket. You might get lucky and nothing ever happens to your wheels, but just be cautious and throw that bearing in there, it is much cheaper than a new wheel.
Reply With Quote
  #15   Spotlight this post!  
Unread 04-06-2008, 03:41 PM
mark johnson's Avatar
mark johnson mark johnson is offline
Registered User
FRC #3175 (knight vision)
Team Role: Mentor
 
Join Date: Mar 2005
Rookie Year: 2000
Location: clinton twp michigan
Posts: 70
mark johnson has much to be proud ofmark johnson has much to be proud ofmark johnson has much to be proud ofmark johnson has much to be proud ofmark johnson has much to be proud ofmark johnson has much to be proud ofmark johnson has much to be proud ofmark johnson has much to be proud ofmark johnson has much to be proud of
Re: pic: Problem with IFI Wheels

You must doing something wrong because we have been using them for the past two years and there industructable. Last year we competed in six competitions between first and off season events . also before the off season events we loged many hours of pratice time for the new drivers and not one failure.
__________________
K.I.S.S.
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
Problem with easy c pro and mechanum wheels pbrules15 Programming 9 02-03-2007 07:38 PM
pic: What do you do when you don't have enough money to buy 6 IFI wheels? Arefin Bari Extra Discussion 1 02-14-2006 12:14 AM
TO much traction??? (ifi wheels or AM wheels) Heretic121 Technical Discussion 9 02-04-2006 11:09 AM
pic: Team 229's Anodized IFI Wheels Adrienne E. Extra Discussion 11 01-23-2006 04:55 PM
problem loading code with ifi loader psych0gambit Programming 7 02-25-2005 07:43 PM


All times are GMT -5. The time now is 10:58 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