Team 20`s Robot design.

FIRST Robot Showcase
1

I talked to team 20 at nationals and I absolutly loved the design and was wondering if someone from team 20 that has access to the cad files could pm me.

thanks!

2

Thank you, we worked really hard on our design this year. I can talk to our CAD team and get back to you with the files.

3

I don’t have the CAD files, but I would like to comment on the Rocketeers robot.

I loved the mechanum drive. The speed of the robot was impressive and what seemed to be controlled drifting on the turns was amazing. It was a great design along with well prepared drivers. I liked watching your guys robot in Boston. Even though you knocked us out of elims, you guys deserved it. Congrats on a good season.

hope to see you next year in Boston.

4

Thanks on all of the Comments and I am part of the CAD team but i don’t have any of the files they are at school on a locked account. But thanks for all of the positive feedback.

5

You can view pictures of Team 20’s CAD files at Autodesk FIRSTbase.
http://firstbasefrc.autodesk.com/?nd=m_first_competition_inv2008_viewer&addlastlink=1
Second one down.

Amazing robot by the way, our team was in awe every time you guys played, both at FLR and Boston.

6

I’m thinking Team 20 could make a killing selling those mecanum wheels. Very cool.

7

From the looks of it those are the 6in AndyMark mecanum wheels so they are already commercially available.

MikeM.

8

Almost, they where using the AndyMark wheels but bent the sides plates. So they milled new side plates out of solid aluminum and attached the AndyMark rollers.:smiley:

9

Learn something new everyday. Thanks :smiley:

MikeM.

10

We did get a lot of publicity about the wheels and i don’t know how many times i had to explain them to the people in the pits. I am on the Drive team and within the first 10 mins of driving on the andymark wheels on our practice field the side walls near the rollers collapsed in pitching the rollers so they would not roll , the bumps in the middle of the field was what did it. So we took the geometry from the andymark wheels and just redesigned them so they were reinforced. I dont have a picture but we will be at Battlecry.

11

Here is a Picture i got from a mentor taken at the FLR in Rochester

12

Those are some really nice looking hubs there. How much did they weigh?

MikeM.

13

Take if from someone who played against them, they were awesome this year. I have always liked this type of mechanum wheel for FIRST robots because it puts a lot more contact area on the floor then the other designs. AM,357,ETC. The draw back to this style is you can’t really climb anything. Team 20 definitely had a great robot design though them and 39 made up a killer alliance along with 207.

14

Ah yes, I remember these wheels. I named them “machinist’s worst nitemare” :smiley: Do you have any pics of them during manufacturing? They certainly are some of the nicest machined pieces I’ve seen all season.

15

There is a video of it being made and one of our mentors has it so i will track it down and post it on youtube. But also regarding the weight of the wheels, they are about 8 pounds per wheel.

16

…per wheel?

really?

17

Ya it might be like 7.8 something but ballpark range of 8 pounds.

18

:confused: The AndyMark 8" Mecanums are listed on their Website at 2.5 pounds per wheel, and the 6" wheels are only 1.25 pounds. Do yours really weigh three times as much as the 8-inch AMs? Just wondering…

For a comparison, a mid-90s aluminum 14-inch wheel (without tire) for a Mazda Miata weighs about 11 pounds, and a 14-inch BBS wheel for the same car only weighed 8.5 pounds. Those are MUCH bigger than your robot wheels. I’m guessing that your wheels weigh eight pounds for all four.

19

Nope they are. they were made by a 7x7 solid block of aluminum and was milled out. This also includes the rollers and the bolts that hold the rollers on.

20

Hes right they are roughly 8 ponds per wheel.