Chief Delphi - You broke WHAT??!!

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Chief Delphi (http://www.chiefdelphi.com/forums/index.php)

- General Forum (http://www.chiefdelphi.com/forums/forumdisplay.php?f=16)

- - You broke WHAT??!! (http://www.chiefdelphi.com/forums/showthread.php?t=73148)

NorviewsVeteran

28-01-2009 22:40

Re: You broke WHAT??!!

Maybe you should be. I know I was since day 2 or 3.

Andy L

28-01-2009 22:51

Re: You broke WHAT??!!

This happened to us around week 2ish. I'm not sure if we plan on replacing it yet, I'm about to post on Q&A to see what they say.

billbo911

29-01-2009 00:30

Re: You broke WHAT??!!

Quote:

Originally Posted by gorrilla (Post 810063)

is it cracked all the way through, or just through the white plastic?

Just the white plastic.

Quote:

Originally Posted by meastman (Post 810067)

oh man, that's pretty bad. hopefully you have and extra.

Yep, we just swapped it out with one of the wheels we had put on the trailer we made. Now the trailer goes thump, thump, thump.

Quote:

Originally Posted by CraigHickman (Post 810070)

I'm concerned that these wheels break this easily.... How high was this dropped from?

(what I'm getting at is that if FIRST is requiring me to use a system that can't handle a competition, I won't be the happiest...)

The drop was between 3.5 and 4 feet. It was loaded with two sprockets, two spacers and an AM 500 hub.

115inventorsam

29-01-2009 01:08

Re: You broke WHAT??!!

Quote:

Originally Posted by JesseK (Post 810072)

If a robot almost tips over, then doesn't quite tip and slams back down on its wheels, I suspect this will happen.

It probably won't happen much during competition. How do I know? We've done that a few times already(in one day too!:o). Nothing wrong with the wheels for now, and that was onto a hard surface. As mentioned before, it will be even less likely to happen with the carpet underneath the regolith.

lenny8

29-01-2009 02:34

Re: You broke WHAT??!!

who ever did that must have to tap and debur everything for a week:D

David Brinza

29-01-2009 02:59

Re: You broke WHAT??!!

Team 980 had a KOP wheel crack during week 1 after being dropped about 3 feet onto a linoleum floor. It's now a trailer wheel...

pheadxdll

29-01-2009 09:02

Re: You broke WHAT??!!

Not something you would expect. :D

EricVanWyk

29-01-2009 09:28

Re: You broke WHAT??!!

Quote:

Originally Posted by Sam2197 (Post 810110)

for stuff like this i wish i could see it from a high speed camera. then you'd realize its not that hard to crack one of these really hard wheels. if anyone is interested in a good show watch time warp on discovery. it takes random things and tapes them on high speed. i think its cool

I had access to a 1000fps camera, and was beginning to shoot a documentary I call "FIRST On Fire: Failure Modes at the Speed of Molasses". It featured a bunch of components releasing magic smoke.

Unfortunately, I have no time for anything these days.

Kevin Sevcik

29-01-2009 10:36

Re: You broke WHAT??!!

I agree that the wheels are unlikely to break on the FRP or carpet on the field. Of course that doesn't mean they won't break on all the nice hard floors everywhere else the robot goes.... Guess it's more important than ever to have sturdy grips on your robot and a steady cart to move it around on.

AlexD744

29-01-2009 16:21

Re: You broke WHAT??!!

If your concern about expensive things breaking, watch out for the control board. A driver station or sidecar (I forget which) broke because someone touched it wothout grouding themselves first (thankfully for that person we don't know who). Just be careful wen handling that stuff.

Daniel_LaFleur

29-01-2009 17:45

Re: You broke WHAT??!!

Quote:

Originally Posted by billbo911 (Post 810051)

Somehow, I doubt that wheel will pass inspection ... something about a traction advantage :P

billbo911

29-01-2009 17:50

Re: You broke WHAT??!!

Quote:

Originally Posted by Daniel_LaFleur (Post 810507)

Somehow, I doubt that wheel will pass inspection ... something about a traction advantage :P

Bummer, now our secret is out. Thanks for nothing Daniel.:D JK

Rick TYler

29-01-2009 17:54

Re: You broke WHAT??!!

But how will you repair it without the handyman's secret weapon? I know! Zip ties -- the duct tape of FIRST!

billbo911

29-01-2009 18:01

Re: You broke WHAT??!!

Quote:

Originally Posted by Rick TYler (Post 810514)

But how will you repair it without the handyman's secret weapon? I know! Zip ties -- the duct tape of FIRST!

Duct tape is actually legal this year, but it can't be used to enhance traction. So, this wheel has been relocated into the trailer.

DonRotolo

30-01-2009 00:02

Re: You broke WHAT??!!

Quote:

Originally Posted by thefro526 (Post 810095)

I think someone posted a picture a few weeks ago of an almost identical break.

Yup, right here.

The moral is, don't drop your robot!

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