Chief Delphi - Dry Ice on Robot?

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

- Technical Discussion (http://www.chiefdelphi.com/forums/forumdisplay.php?f=22)

- - Dry Ice on Robot? (http://www.chiefdelphi.com/forums/showthread.php?t=115923)

CalTran

10-04-2013 15:31

Re: Dry Ice on Robot?

Quote:

Originally Posted by Woolly (Post 1259884)

So if all goes as planned, they will waive the foul or you will get a free balloon every match. :cool:

I like balloons though...note to self, start getting penalties for left behind pneumatic air

Retired Starman

10-04-2013 21:15

Re: Dry Ice on Robot?

Quote:

Originally Posted by MooreteP (Post 1259694)

Did you want to create a mystery mist around your Robot? Kind of like the lighting schemes that many teams use?

If the field personnel see a "mist" coming out of your robot, they are going to hit the kill switch thinking something is on fire in there!

Not the result I want.

Dr. Bob
Chairman's Award is not about building the robot. Every team builds a robot.

DonRotolo

10-04-2013 22:44

Re: Dry Ice on Robot?

Quote:

Originally Posted by Tom Line (Post 1259638)

You'd have a fun argument on your hands if you tried to hold it on the motors yourself. Just used a compressed air can and turn it upside down. Same thing, safer, and probably faster too.

Safer for the humans, but those permanent magnets inside the CIMs (and many other motors) are about as fragile as glass.

Try this: Boil a regular drinking glass, then plunge it into ice cold water. What happens? Yep, same for a ferrite magnet, which means you'll be changing a motor soon.

CalTran

10-04-2013 23:08

Re: Dry Ice on Robot?

Quote:

Originally Posted by DonRotolo (Post 1260248)

Try this: Boil a regular drinking glass, then plunge it into ice cold water. What happens? Yep, same for a ferrite magnet, which means you'll be changing a motor soon.

For point of not getting in trouble with my parents, I assume the glass would crack? I can see why people would look for ways to cool a motor down fast after a match, but even after playing some back to backs with "pushing" matches, I can't recall our motors getting too hot. Meaning they still pass the 5 second test. Maybe it's just the competitions I've been in.

seg9585

11-04-2013 00:49

Re: Dry Ice on Robot?

Quote:

Originally Posted by CalTran (Post 1260262)

To be safer than the science experiment recommended above, you can get the same effect by boiling water inside an open soda can, then turning the can upside down and dunk it into cold water.

flippy147852

11-04-2013 13:39

Re: Dry Ice on Robot?

Quote:

Originally Posted by CalTran (Post 1260262)

I can see why people would look for ways to cool a motor down fast after a match, but even after playing some back to backs with "pushing" matches, I can't recall our motors getting too hot. Meaning they still pass the 5 second test. Maybe it's just the competitions I've been in.

I know a timeout (timeouts even?) was taken at the 2010 MSC finals because we had back-to-back-to-back-to-back matches and our motors were literally too hot to touch. I think we cooled them with wet rags, but that was pretty slow.

FrankJ

11-04-2013 13:56

Re: Dry Ice on Robot?

C02 is not toxic to humans. Without it you have no breathing reflex, stop breathing, & die. One of the reasons confined space access is such a pain in the @#Q. (Oxygen deficiency lead to no C02 in lunges). :]

CalTran

11-04-2013 14:01

Re: Dry Ice on Robot?

Quote:

Originally Posted by flippy147852 (Post 1260520)

Well, that's a somewhat special case and won't be happening in official competitions with the new tie breaker system.

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