27-01-2006 20:42

techtiger1

Re: pic: 1251 Teaser

This is the 2006 robot wheel it's white UHMW and is extremely strong, the plan is to wrap them in rough top conveyor material. This was done on a CNC mill and went through the whole engineering process from Inventor, to Master cam, to the cnc milling machine. Any questions?

Have fun,
Drew

27-01-2006 21:22

spamified88

Re: pic: 1251 Teaser

It looks like it's strong, but another team had a problem manufacturing thier wheels out of some sort of plastic and then it smashed to pieces when it got caught under their cart. I hope that doesn't happen to your team.

27-01-2006 22:18

Peter Matteson

Re: pic: 1251 Teaser

When you say UHMW do you mean ultra high molecular weight polyethelene or is it another UHMW plastic?

27-01-2006 22:29

Madison

Re: pic: 1251 Teaser

That wasn't a problem so much as it was an understood design flaw. The wheels in that photo were made from acrylic, a material that is far more fragile than polyethylene. They were made quickly as prototypes and were being run on a prototype chassis. Our competition-legal wheels are made from delrin and aluminum.

27-01-2006 22:34

David Guzman

Re: pic: 1251 Teaser

Yes it is Ultra High Molecular Weight Polyethylene, and honestly they ARE unbreakable. We hammer it, throw it on concrete like over 20 times. We threw in to walls as hard as we could throw it all it did was bounce back. Not even a crack. They are stronger then we ever thought they would be.

Any guesses on the weight?

28-01-2006 13:08

pyroslev

Re: pic: 1251 Teaser

5-8 Ounces, maybe all four are 1 lb, maybe a little more.

Nice job on those beauties.

29-01-2006 13:52

ricemaniac23

Re: pic: 1251 Teaser

What is the actual wheel made out of, plastic or metal?

29-01-2006 14:13

techtiger1

Re: pic: 1251 Teaser

The actual wheel is made out of plastic ultra high molecular weight polyethylene to be exact. Please read before you post. Thank you

-Drew

30-01-2006 09:12

Swampcoder2

Re: pic: 1251 Teaser

1/3 the density of aluminum
here are a few spec sheets:
http://www.matweb.com/search/Specifi...ssnum=PWEST003
http://www.matweb.com/search/Specifi...bassnum=PGAR00
my guess on weight is 1/8lb per wheel

30-01-2006 09:30

Alex Cormier

Re: pic: 1251 Teaser

lemme guess a little more, 8wd with these wheels will be amazing?

30-01-2006 21:23

techtiger1

Re: pic: 1251 Teaser

OH Alex on the right track there bud. What about two speeds too hum I dunno I guess the world will have to wait and see. Good thought though.

- Drew

30-01-2006 21:29

Alex Cormier

Re: pic: 1251 Teaser

two speeds? who needs 2 speeds this year?

30-01-2006 21:46

tiffany34990

Re: pic: 1251 Teaser

i really can't wait to see this robot completed. these wheels look really cool. if you didn't know what they were made of you would think they wouldn't be that great. keep up the good work 1251!! I can't wait to see it at the Florida Regional!