pic: Cornelius VIII - FRC469

[woody]

Originally Posted by Don Wright

We want to keep some secrets... If we tell all, there won't be any interest in us...

Oh, there will be interest! I have to ask, can your end effector pick up from the floor? human player? And do you hold the ringers vertically (parallel with the spider foot) or rotate them to a more horizontal position?
Can't wait to see you guys this weekend. Maybe we'll have the pleasure of playing with you!

[VanMan]

looks really heavy

[Frenchie]

Originally Posted by VanMan

looks really heavy

as always, we carried out an ambitious design and, strong from our previous experiences, we knew weight would be a problem from day one. Early estimates of our robot during the design phase went over 170 lbs. From there, weight was at the center of everything we did. We currently weight around 115 lbs but went as far as using different aluminum alloys on certain part of the robot to reach this figure.

Francois.

[Don Wright]

Yes, we can pick up from the floor and from the back wall... The ringers are held mostly horizontal...

Yes...it would be nice to play with the Killer Bees... I don't think we have since I've been on 469...

Looking forward to this weekend as well!!

[shamuwong]

There should be a camera and a working autonomous.

Indeed, weight was a great concern. Everything on the robot was made as light as possible, such as the gripper, which weighs less than 2 pounds, and the elevator motor mount, which was made of stamped 1/16th aluminum. If we were to somehow be overweight, there's pretty much no more places to drill holes without making our robot a crumple zone.

To be fair, I credit some of the ideas to other great teams who have been able to shove a ridiculous amount of features on a 120lb robot. I had 33's short-lived stamped-steel swerve drive modules from 2005 in mind when I worked on the motor mount.

Wait until you see it move. It'll make the weight seem even more impressive.

[Karthik]

Don,

The similarities are eerie. Knowing that we're on the same page as 469 makes me feel really good about things.

[Don Wright]

Karthik... I feel the same way... See you in two days...

[Jimmy Holmes]

hmmmm, looks very interesting

http://www.chiefdelphi.com/media/photos/27145

[BRosser314]

Originally Posted by Jimmy Holmes

hmmmm, looks very interesting

http://www.chiefdelphi.com/media/photos/27145

Long Ramp JImmy, does it fit in a 5 foot or the 4 foot class, and whats the area of the complete ramp?

[dtk]

Originally Posted by Jimmy Holmes

hmmmm, looks very interesting

http://www.chiefdelphi.com/media/photos/27145

All the cool kids are doing it! Can't wait to see it in person at Detroit.

Originally Posted by Lil' Lavery

While the metal grating is ideal for traction-wheeled teams, will your ramp provide any provisions for improving the chances of omni-wheeled teams at getting up?
I can't tell from the picture, but the section of the ramp that deploys from the rear one piece, or does it have a gap in the middle?
Is the device sticking out of the ramp at the rear just to ensure that your ramp doesn't become a "traction device", or does it raise the whole ramp to 12"?
Can you load tubes off the ground, or just the wall?
Is there a camera that I'm missing, is it coming later, or are you guys not using it?
What motors are used where, and are you using DeWalt transmissions again?
And of course, the perennial 469 question, HOW DID THAT MAKE WEIGHT!?!


Sorry for the tons of questions, but 469 is really one of the more inspiring bots every year, and I'm dying to learn more about Cornelius. Good luck, I'm sure you will be a force to be reckoned with at GLR.
Hope you can pull off the ramp-ringer combo, nobody really has yet.

The rear ramp deploys as a whole piece. The cutout that you can see in the picture is just there in order to give the arm a spot to fold into. We have also had several discussions about traction material for the ramp but it is a low priority for us at this point.

The devices on the ramp are in fact for lifting it to twelve or so inches. They are, however, not complete as pictured.

The gripper itself, as I think Don mentioned, can grab tubes from the floor, the wall, and, theoretically at least, from the HP over the driver station wall. The mast rotates to make this possible.

The camera should be along shortly. We actually didn't have any time to work on it due to more... pressing, programming issues. Our plan is to still use it at least for auto.

We are again using 4 dewalt transmissions on the drive and plan to servo shift them again this year.

Weight wise, we used as thin and light material as possible everywhere. There are almost no pieces on the robot thicker than 1/16th of an inch. Even parts that needed thicker walls to support holes, like on the gripper, are only 1/8th thick around the hole and milled down to 1/16th everywhere else. The round tube, of course, is even thinner. It really was a situation where we thought about weight in everything we did.

-dtk

btw, if any of this turns out to be a "secret" don't tell them it was me who told you .

[BRosser314]

Originally Posted by dtk

btw, if any of this turns out to be a "secret" don't tell them it was me who told you .

keep it secret