Go to Post ...isn't that part of the point? For high schoolers to do things they "could not have" by themselves? - AdamHeard [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

 
Reply
Thread Tools Rate Thread Display Modes
  #1   Spotlight this post!  
Unread 17-01-2009, 19:21
KRUNCH DUDE's Avatar
KRUNCH DUDE KRUNCH DUDE is offline
Registered User
AKA: Erik
FRC #0079 (KRUNCH)
Team Role: Alumni
 
Join Date: Mar 2008
Rookie Year: 2007
Location: Clearwater
Posts: 32
KRUNCH DUDE is a jewel in the roughKRUNCH DUDE is a jewel in the roughKRUNCH DUDE is a jewel in the rough
Send a message via AIM to KRUNCH DUDE
pic: Wheel problem.

Reply With Quote
  #2   Spotlight this post!  
Unread 17-01-2009, 19:22
thefro526's Avatar
thefro526 thefro526 is offline
Mentor for Hire.
AKA: Dustin Benedict
no team (EWCP, MAR, FRC 708)
Team Role: Mentor
 
Join Date: Aug 2006
Rookie Year: 2005
Location: New Jersey
Posts: 2,599
thefro526 has a reputation beyond reputethefro526 has a reputation beyond reputethefro526 has a reputation beyond reputethefro526 has a reputation beyond reputethefro526 has a reputation beyond reputethefro526 has a reputation beyond reputethefro526 has a reputation beyond reputethefro526 has a reputation beyond reputethefro526 has a reputation beyond reputethefro526 has a reputation beyond reputethefro526 has a reputation beyond repute
Send a message via AIM to thefro526 Send a message via MSN to thefro526
Re: pic: Wheel problem.

How exactly did this happen? Did you do it while driving or did you drop the wheel?
__________________
-Dustin Benedict
2005-2012 - Student & Mentor FRC 816
2012-2014 - Technical Mentor, 2014 Drive Coach FRC 341
Current - Mentor FRC 2729, FRC 708
Reply With Quote
  #3   Spotlight this post!  
Unread 17-01-2009, 19:40
NorviewsVeteran's Avatar
NorviewsVeteran NorviewsVeteran is offline
Precision Driver Extraordinaire
AKA: Richard Raitt
FRC #1793 (Pilots)
Team Role: Alumni
 
Join Date: Oct 2008
Rookie Year: 2006
Location: Norfolk VA
Posts: 569
NorviewsVeteran has a reputation beyond reputeNorviewsVeteran has a reputation beyond reputeNorviewsVeteran has a reputation beyond reputeNorviewsVeteran has a reputation beyond reputeNorviewsVeteran has a reputation beyond reputeNorviewsVeteran has a reputation beyond reputeNorviewsVeteran has a reputation beyond reputeNorviewsVeteran has a reputation beyond reputeNorviewsVeteran has a reputation beyond reputeNorviewsVeteran has a reputation beyond reputeNorviewsVeteran has a reputation beyond repute
Re: pic: Wheel problem.

I suggest finding the "macro" option on your camera. It takes clearer pictures up close.

All of ours are holding up fine, but we haven't driven around yet.
__________________
______
I was in Scouts but I wanted out by the third meeting. I was in TSA, but I quit after a couple of weeks. I don't go camping with the SCA anymore. I was in taekwondo but I had to leave because I got sick.
I joined FIRST and stuck with it. It was nice enough to return the favor.

Reply With Quote
  #4   Spotlight this post!  
Unread 17-01-2009, 19:51
Jacob Paikoff's Avatar
Jacob Paikoff Jacob Paikoff is offline
FRC reunion tour
FRC #0079 (Krunch)
Team Role: Mentor
 
Join Date: Apr 2007
Rookie Year: 2007
Location: Tarpon Springs, FL
Posts: 193
Jacob Paikoff has a brilliant futureJacob Paikoff has a brilliant futureJacob Paikoff has a brilliant futureJacob Paikoff has a brilliant futureJacob Paikoff has a brilliant futureJacob Paikoff has a brilliant futureJacob Paikoff has a brilliant futureJacob Paikoff has a brilliant futureJacob Paikoff has a brilliant futureJacob Paikoff has a brilliant futureJacob Paikoff has a brilliant future
Re: pic: Wheel problem.

We were drifting and the robot went from the Regolith to the wood floor and back on and then we found the plastic cracked when we were checking the robot.
__________________
Team 79, Krunch 2007-2010 Student
Team 2059, The Hitchhikers 2011-2014 College Mentor
Team 5402, The Iron Kings 2015 Mentor
Team 79, Krunch 2016 - Mentor
Reply With Quote
  #5   Spotlight this post!  
Unread 17-01-2009, 19:53
ATannahill ATannahill is offline
Registered User
AKA: Alex Tannahill
no team
 
Join Date: Feb 2008
Rookie Year: 2008
Location: Southfield, Michigan
Posts: 3,258
ATannahill has a reputation beyond reputeATannahill has a reputation beyond reputeATannahill has a reputation beyond reputeATannahill has a reputation beyond reputeATannahill has a reputation beyond reputeATannahill has a reputation beyond reputeATannahill has a reputation beyond reputeATannahill has a reputation beyond reputeATannahill has a reputation beyond reputeATannahill has a reputation beyond reputeATannahill has a reputation beyond repute
Re: pic: Wheel problem.

Forgive the quality, that is what we get with a camera phone, what you may not see are some cracks in the black plastic.

We were driving and when we stopped we found this, supposedly from when we went off of and back onto regolith.
__________________

- Arizona North
Reply With Quote
  #6   Spotlight this post!  
Unread 17-01-2009, 19:59
kevin.li.rit's Avatar
kevin.li.rit kevin.li.rit is offline
Imaginary Friend
AKA: Kevin Li
FRC #0596 (SciClones)
Team Role: Student
 
Join Date: Jan 2003
Rookie Year: 2001
Location: Hopkinton, Massachusetts
Posts: 936
kevin.li.rit has a reputation beyond reputekevin.li.rit has a reputation beyond reputekevin.li.rit has a reputation beyond reputekevin.li.rit has a reputation beyond reputekevin.li.rit has a reputation beyond reputekevin.li.rit has a reputation beyond reputekevin.li.rit has a reputation beyond reputekevin.li.rit has a reputation beyond reputekevin.li.rit has a reputation beyond reputekevin.li.rit has a reputation beyond reputekevin.li.rit has a reputation beyond repute
Send a message via Yahoo to kevin.li.rit
Re: pic: Wheel problem.

Where these wheels being driven by some sort of hub? They are the same hub as the previous andymark wheels.
__________________
Kevin Li

596 - Sciclones
1405 - Finney Falcons
2262 - Holliston Panthers
Reply With Quote
  #7   Spotlight this post!  
Unread 17-01-2009, 20:00
gallo26's Avatar
gallo26 gallo26 is offline
Team 79 Alumni
AKA: Bryan Gallo
FRC #0079 (Team KRUNCH)
Team Role: Alumni
 
Join Date: Jan 2008
Rookie Year: 2007
Location: Largo, Florida
Posts: 113
gallo26 is a name known to allgallo26 is a name known to allgallo26 is a name known to allgallo26 is a name known to allgallo26 is a name known to allgallo26 is a name known to all
Send a message via AIM to gallo26
Re: pic: Wheel problem.

And after i noticed this wheel thanks to our team members, i quickly checked the rest of the wheels. and sure enough the other back wheel is ready to give. The front 2 wheels are cracked but they didn't shatter yet. Could this be a huge issue during competition between the regolith and the carpet?

I'll also try to get you guys some photos of the rest of the wheels. Almost like a before... during... and after stage.
__________________
Team 79 Alumni '11- Present
Team 79 Driver '09, '10
Team 79 Senior CAD Designer '09, '10
Team 79 President '09
Team 79 Electrical Sub Team Leader '08, '09

Reply With Quote
  #8   Spotlight this post!  
Unread 17-01-2009, 20:03
gallo26's Avatar
gallo26 gallo26 is offline
Team 79 Alumni
AKA: Bryan Gallo
FRC #0079 (Team KRUNCH)
Team Role: Alumni
 
Join Date: Jan 2008
Rookie Year: 2007
Location: Largo, Florida
Posts: 113
gallo26 is a name known to allgallo26 is a name known to allgallo26 is a name known to allgallo26 is a name known to allgallo26 is a name known to allgallo26 is a name known to all
Send a message via AIM to gallo26
Re: pic: Wheel problem.

Quote:
Originally Posted by Coffeeism View Post
Where these wheels being driven by some sort of hub? They are the same hub as the previous andymark wheels.
Its just using the bearings provided with the wheels and the wheel was driven by a chained sprocket.
__________________
Team 79 Alumni '11- Present
Team 79 Driver '09, '10
Team 79 Senior CAD Designer '09, '10
Team 79 President '09
Team 79 Electrical Sub Team Leader '08, '09

Reply With Quote
  #9   Spotlight this post!  
Unread 17-01-2009, 20:16
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: 310
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 beholdbigbeezy is a splendid one to behold
Send a message via AIM to bigbeezy
Re: pic: Wheel problem.

were u drifting onto the wood floor? and does the wood floor have a lot more friction? idk maybe the sliding sideways is fine on the regolith but when they go onto something of greater friction the wheels cant take it. i wouldnt think that would cause them to fail but its a possibility

o wait is the hub broke? maybe too much sudden torque like changing directions very quickly
Reply With Quote
  #10   Spotlight this post!  
Unread 17-01-2009, 20:22
NorviewsVeteran's Avatar
NorviewsVeteran NorviewsVeteran is offline
Precision Driver Extraordinaire
AKA: Richard Raitt
FRC #1793 (Pilots)
Team Role: Alumni
 
Join Date: Oct 2008
Rookie Year: 2006
Location: Norfolk VA
Posts: 569
NorviewsVeteran has a reputation beyond reputeNorviewsVeteran has a reputation beyond reputeNorviewsVeteran has a reputation beyond reputeNorviewsVeteran has a reputation beyond reputeNorviewsVeteran has a reputation beyond reputeNorviewsVeteran has a reputation beyond reputeNorviewsVeteran has a reputation beyond reputeNorviewsVeteran has a reputation beyond reputeNorviewsVeteran has a reputation beyond reputeNorviewsVeteran has a reputation beyond reputeNorviewsVeteran has a reputation beyond repute
Re: pic: Wheel problem.

It might be a general stress fracture, considering the wheels (hub and tire) have ZERO give when it comes to bumps, such as driving onto a panel. I sure hope it isn't common, and that you guys get replacement wheels soon.
__________________
______
I was in Scouts but I wanted out by the third meeting. I was in TSA, but I quit after a couple of weeks. I don't go camping with the SCA anymore. I was in taekwondo but I had to leave because I got sick.
I joined FIRST and stuck with it. It was nice enough to return the favor.

Reply With Quote
  #11   Spotlight this post!  
Unread 17-01-2009, 20:47
Unsung FIRST Hero Woodie Flowers Award
Chris Fultz Chris Fultz is offline
My Other Car is a 500 HP Turbine
FRC #0234 (Cyber Blue)
Team Role: Engineer
 
Join Date: Jan 2002
Rookie Year: 1942
Location: Indianapolis, IN
Posts: 2,837
Chris Fultz has a reputation beyond reputeChris Fultz has a reputation beyond reputeChris Fultz has a reputation beyond reputeChris Fultz has a reputation beyond reputeChris Fultz has a reputation beyond reputeChris Fultz has a reputation beyond reputeChris Fultz has a reputation beyond reputeChris Fultz has a reputation beyond reputeChris Fultz has a reputation beyond reputeChris Fultz has a reputation beyond reputeChris Fultz has a reputation beyond repute
Re: pic: Wheel problem.

can you post a picture of a wheel "as assembled"?

are you using a plate sprocket, or one with hubs?

if you are using a plate, is there enough clearance between the chain and the wheel material, or is there some rubbing?

We have been driving the new wheels for about 2 weeks on a practice chassis (with #35 chain, KOP bearings, fixed axles and aluminum sprockets) and have not seen any issues at all.
__________________
Chris Fultz
Cyber Blue - Team 234
2016 IRI Planning Committee
2016 IndyRAGE Planning Committee
2010 - Woodie Flowers Award - Championship
Reply With Quote
  #12   Spotlight this post!  
Unread 17-01-2009, 20:47
germanystudent's Avatar
germanystudent germanystudent is offline
Trashed and Scattered
AKA: Everett
FRC #2865 (Roboteknix)
Team Role: Mentor
 
Join Date: Sep 2008
Rookie Year: 2008
Location: Post Falls
Posts: 86
germanystudent has a spectacular aura aboutgermanystudent has a spectacular aura aboutgermanystudent has a spectacular aura about
Send a message via MSN to germanystudent
Re: pic: Wheel problem.

it might be the shock from the regolith to the wood... kinda like skidding out on ice then sliding onto pavement.
__________________
Nobody leaves my reality without a note from their mother!
Reply With Quote
  #13   Spotlight this post!  
Unread 17-01-2009, 20:49
dmcguire3006 dmcguire3006 is offline
Registered User
FRC #3006 (West High FIRST Robotics)
Team Role: Teacher
 
Join Date: Dec 2008
Rookie Year: 2009
Location: Salt Lake City, UT
Posts: 21
dmcguire3006 is on a distinguished road
Re: pic: Wheel problem.

Don't use LocTite on you wheels... It dissolves the plastic. Your picture is what our wheels looked like a day after we tapped the wheels for the 10-32 screws and applied LocTite.

Bummer!
Reply With Quote
  #14   Spotlight this post!  
Unread 17-01-2009, 21:01
gallo26's Avatar
gallo26 gallo26 is offline
Team 79 Alumni
AKA: Bryan Gallo
FRC #0079 (Team KRUNCH)
Team Role: Alumni
 
Join Date: Jan 2008
Rookie Year: 2007
Location: Largo, Florida
Posts: 113
gallo26 is a name known to allgallo26 is a name known to allgallo26 is a name known to allgallo26 is a name known to allgallo26 is a name known to allgallo26 is a name known to all
Send a message via AIM to gallo26
Re: pic: Wheel problem.

Well we did not locktite the wheels. It was hard enough to get those screws in there after we tapped the holes. But i do know that there is not a lot of friction on the wood. Its a gym floor. basketball court. whatever you want to call it. Theres no hub, just a sprocket spaced by the spacers provided with the wheels. Theres a ton of clearance using #35 chain. So... i hope it was a bad batch or something... because this competition requires drifting and sliding. Who knows what went wrong...
__________________
Team 79 Alumni '11- Present
Team 79 Driver '09, '10
Team 79 Senior CAD Designer '09, '10
Team 79 President '09
Team 79 Electrical Sub Team Leader '08, '09

Reply With Quote
  #15   Spotlight this post!  
Unread 17-01-2009, 21:02
Nathan Streeter's Avatar
Nathan Streeter Nathan Streeter is offline
FIRST Fan(atic)
FRC #1519 (Mechanical MAYHEM)
Team Role: Mentor
 
Join Date: Feb 2008
Rookie Year: 2006
Location: Merrimack, NH
Posts: 676
Nathan Streeter has a reputation beyond reputeNathan Streeter has a reputation beyond reputeNathan Streeter has a reputation beyond reputeNathan Streeter has a reputation beyond reputeNathan Streeter has a reputation beyond reputeNathan Streeter has a reputation beyond reputeNathan Streeter has a reputation beyond reputeNathan Streeter has a reputation beyond reputeNathan Streeter has a reputation beyond reputeNathan Streeter has a reputation beyond reputeNathan Streeter has a reputation beyond repute
Re: pic: Wheel problem.

Yeah, a pic of how you mount your wheels to the sprocket would be helpful for advice; however, I'm guessing its how you screwed the sprocket onto the wheel... What I would suggest doing (what has worked for our team this year, and with the past KOP AM wheels) is using a 2" long 8-32 going on the sprocket through the entire wheel, with a nylock on the other end. Tapping may seem like a weight savings, but its a little more work, harder to repair/replace, puts the weight in a smaller area, and may loosen if you don't use LocTite, which can weaken the plastic!
So, I don't know what your team was doing, but I think if you reconsider the wheel mount and buy replacement wheels you should be fine!
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
Autonomous Two wheel problem??? fallen751 Programming 4 11-02-2007 23:07
Lowered Center Wheel for 6 wheel drive 987HighRoller Technical Discussion 37 17-01-2007 01:21
pic: Chantilly Academy's 4 Wheel Drive 4 Wheel Steering!!!! jskene Robot Showcase 25 18-02-2005 20:24
pic: da wheel CD47-Bot Robot Showcase 11 08-02-2004 22:04


All times are GMT -5. The time now is 21:16.

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