11-08-2005 10:25

Billfred

Re: pic: VexLABS Teaser Picture

Swerve drive?

11-08-2005 10:33

Sean Schuff

Re: pic: VexLABS Teaser Picture

It doesn't look like it would be a swerve drive - it appears that there is a frame rail going to the back on the rear side of the drive assembly.

JVN - can we see a pic from the other side? Or would that give it away?

Sean

11-08-2005 11:01

Michael Leicht

Re: pic: VexLABS Teaser Picture

the best vex robot money can buy, or i go with the Swerve drive.

11-08-2005 13:09

Tazlikesrobots

Re: pic: VexLABS Teaser Picture

Crab drive!!

11-08-2005 15:01

dlavery

Re: pic: VexLABS Teaser Picture

OOOhhhh! OOOOOhhhhhhH!!! OOOHHHH!!! Mr. Kotter! Mr. Kotter! I know! I know!!!!

('cause I saw it last weekend)

11-08-2005 15:12

mechanicalbrain

Re: pic: VexLABS Teaser Picture

Im curious what the wheel is but im more curious about whats behind it. Its at the right corner just behind the wheel.

11-08-2005 15:26

Conor Ryan

Re: pic: VexLABS Teaser Picture

i know i know *jumps up and down*
It's a robot!

actually, i'm pretty confident its swerve (crab) drive. But also a transmission is a possiblity, maybe something like that.

11-08-2005 15:52

Billfred

Re: pic: VexLABS Teaser Picture

Wait, I've got it. JVN has figured out how to mate the DeWalt XRP transmissions to a Vex setup. NBD just reached the next level.

11-08-2005 19:15

Rich Kressly

Re: pic: VexLABS Teaser Picture

Horshak is right. A bunch of us saw it, and driving it is pretty cool too as long as you stay under the speed limit

12-08-2005 00:14

Rabbit222

Re: pic: VexLABS Teaser Picture

I'm guessing.............crab drive

13-08-2005 21:35

Wetzel

Re: pic: VexLABS Teaser Picture

You guys make me want to get the DVD....


Wetzel

14-08-2005 14:16

artdutra04

Re: pic: VexLABS Teaser Picture

Well folks, this is a teaser no more... Enjoy
(These were all obtained on the vexlabs.com website)






But wait, it gets even better! See it in action!
swerve-slalom.wmv - 1.2 Mb
swerve-spin.wmv - 1.5 Mb

P.S. I also found some stuff about a "Tumbler" robot - See the following links for pics and video:
http://www.vexlabs.com/images/vex-ro...er-bot-700.gif
http://www.vexlabs.com/images/vex-ro...-bot-a-700.gif
http://www.vexlabs.com/images/vex-ro...t-side-700.gif
tumbler-box.wmv - 0.7 Mb
tumbler-climb.wmv - 1.3 Mb

14-08-2005 15:27

sanddrag

Re: pic: VexLABS Teaser Picture

Very cool. Thanks for the links. But I don't entirely get it. Are the grey wheels just super low traction or something so they can slide easily? Why not omniwheels? Maybe these grey ones give a smoother ride?

14-08-2005 15:33

Arefin Bari

Re: pic: VexLABS Teaser Picture

I spoke with John, it seems like the project goal was to make a swerve drive using 1 kit. They did add another servo to the kit but it works very nicely. Thats the reason they didn't use omni wheels. If you take the green tire off of the wheels, you will get that grey part. Its really smooth and slippery. They were made that way on purpose.

14-08-2005 19:45

sanddrag

Re: pic: VexLABS Teaser Picture

Thanks. Without actualy owning one, it is hard to know. It is good to have piece of information - knowing that you have selectable tread/traction.

I wonder if a 4 wheeled omni type robot could be made with only the slippery grey wheels. Would they have enough slip to allow holonomic movement?

14-08-2005 20:18

JVN

Re: pic: VexLABS Teaser Picture

No.
Omni-wheels only work in a holonomic application if they have rolling traction, but not lateral traction.
These wheels have no traction in either direction.

15-08-2005 11:34

Michael Leicht

Re: pic: VexLABS Teaser Picture

what are the ports for the servos, and motors?

what are the controls that are used on this robot?

15-08-2005 19:01

JVN

Re: pic: VexLABS Teaser Picture

For more information, and discussion... please see:

http://www.chiefdelphi.com/forums/sh...125#post401125