26-01-2007 22:39

Mr. Van

Re: pic: 240 lbs against wall!

WOW! By my quick calculation, that means you are getting a horizontal force from your wheels that's at least 1.6 times the weight of the robot. Very impressive! (How'd you do it?!?)

-Mr. Van
RoboDox

26-01-2007 23:36

s_forbes

Re: pic: 240 lbs against wall!

Awesome work guys! I thought that the longer robot might deliver more pushing power than your short one last year, but 240 lbs. is just amazing!

I'll bet it has something with their super wide wheels that everyone says 'have no effect on traction'. Super sticky wheels pushing from the back of a 4 wheel drive robot provide a lot of force.

27-01-2007 00:26

MrForbes

Re: pic: 240 lbs against wall!

I wonder what the vertical force on the scale is?

27-01-2007 00:55

Michael Hill

Re: pic: 240 lbs against wall!

Will it really matter? The scale in that orientation is just measuring the horizontal force. It's not like when you set a scale on the ground, it measures force you put on it from the side.

27-01-2007 01:07

Daniel Brim

Re: pic: 240 lbs against wall!

I'm rather amazed that you can get that type of pushing power with omni wheels. There must be something hidden that would help. Either way, that is impressive.

27-01-2007 01:14

Joe Matt

Re: pic: 240 lbs against wall!

Or it's just 40 lbf

j/k

Great work guys. Very impressed!

27-01-2007 01:39

Goldeye

Re: pic: 240 lbs against wall!

Considering that you "have 40 lbs to play with." (http://www.chiefdelphi.com/media/photos/26448?), meaning you have no more than 80 pounds, 240lb pushing force implies a is simply not believable -- you'd need a coefficient of friction of 3! You better check your scale.

27-01-2007 20:38

falconmaster

Re: pic: 240 lbs against wall!

Calculations or no, that is what we measured. Last year our bot had 200lbs and no body pushed us. (120 lbs robot) We went with a different tread this year, rough top and a a 36 tooth gear rather than the 28 from last year. We check the scale as far as we could it is withing a pound or two. That is what is it read, sorry. We will check it again, but since it was simliar to last year we accepted the data. We will let you know if we find different.

28-01-2007 04:12

sanddrag

Re: pic: 240 lbs against wall!

That just don't seem right.

28-01-2007 13:21

Graham Donaldson

Re: pic: 240 lbs against wall!

Who said they didn't put whatever extra weight they didn't have already on it on it (via gym weights or whatever)? That's what we did to our '05 chassis when we were testing a 6WD format with it. Just zip-tied two 45's to the top and bingo!

That pushing power is impressive, but I worry what might happen when the pushing (particularly in a head-on pushing match) is just a little bit off center with those omnis in the front...