13-06-2006 15:00

Greg Marra

Re: pic: Team 357's 2006 MIT InvenTeam

It looks like the user interface is a single joystick on the right arm of the chair. May I ask how you are using that to control the drive? forwards/backwards and left/right seem easy enough with a single stick, but how are you handling rotation? This is one of the problems with a complicated drive system on FRC robots, and I would love to hear how you approached it on your wheelchair.

Nice work guys, it looks really awesome.

13-06-2006 15:02

Rohith Surampudi

Re: pic: Team 357's 2006 MIT InvenTeam

Wow, thats awesome

ditto on the rotation question

13-06-2006 15:09

Joe Matt

Re: pic: Team 357's 2006 MIT InvenTeam

Looks very nice guys. I'm guessing this is still a prototype. Will we ever see it at the competitions? I'd love to give it a test ride!

13-06-2006 15:10

Greg Perkins

Re: pic: Team 357's 2006 MIT InvenTeam

I'm assuming its a left/right front/back joystick with the stick being able to twist. Looks AWESOME

13-06-2006 15:19

Rosiebotboss

Re: pic: Team 357's 2006 MIT InvenTeam

Nice job.......I can't wait to see it Thursday in Cambridge. When I heard from your teacher in October that you were a FIRST team and what your project was, I knew you would be able to pull it off. (Plus Josh told me you did a fine job when he was a Judge for me at Beantown Blitz.)Such a complicated system but relatively easy for an experienced FIRST team.

Are you presenting Thursday or Friday? I can only attend Thursday pm.

13-06-2006 16:05

JulieB

Re: pic: Team 357's 2006 MIT InvenTeam

On my aunts wheelchair this how it works. The joystick works real well when turning and handles real nice.

13-06-2006 16:29

jester_assault

Re: pic: Team 357's 2006 MIT InvenTeam

Actually, what you cannot see in this picture is that we have replaced the standard 2-axis joystick on the chair with a 3-axis one, which gives us the rotational movement.

13-06-2006 18:17

ZZII 527

Re: pic: Team 357's 2006 MIT InvenTeam

Awesome! I'll be there Thursday to check it out.

13-06-2006 19:09

mizscience

Re: pic: Team 357's 2006 MIT InvenTeam

Wow, good job guys. Do you happen to have a video of it in action?

14-06-2006 01:17

sanddrag

Re: pic: Team 357's 2006 MIT InvenTeam

Looks like a right angle drive on the motors. Are they worm gear drives or bevel gear drives? Are they stock off the shelf wheelchair motors? What size/quantity of batteries do you have? With 4 motors how is battery life?

14-06-2006 05:15

OldDaddyCrane

Re: pic: Team 357's 2006 MIT InvenTeam

We will be presenting on Thursday at 2:15PM. All are welcome!

14-06-2006 13:59

Joe Troy

Re: pic: Team 357's 2006 MIT InvenTeam

The motors are equipped with right angle drives...the gear boxes have helical gear sets. The motors are a standard 24v wheelchair motor. We are using two 12v SLAs to provide the 24 volts required by the motors. Battery life is surprisingly good for a four wheel drive wheelchair.

We are currently at MIT as part of a two day exhibition by the Lemelson MIT InvenTeams. When we return from MIT we will be posting pictures, video and detailed specs for the Jester drive wheelchair.

18-06-2006 16:48

DB_UPS

Re: pic: Team 357's 2006 MIT InvenTeam

Its nice to see it come from robot to kick butt chair!!

18-06-2006 17:16

Freddy Schurr

Re: pic: Team 357's 2006 MIT InvenTeam

I am so proud of our local East Coast Team doing this to make lives betters.

Good Luck Royal Assault!

18-06-2006 21:58

Dan Petrovic

Re: pic: Team 357's 2006 MIT InvenTeam

That's pretty sweet!

Did you guys make those Mecanums or did you buy them?

If you bought them can you give a link as where we could them?

19-06-2006 11:39

Joe Troy

Re: pic: Team 357's 2006 MIT InvenTeam

We made the mecanum wheels.

Our design uses the Airtrax variation of the mecanum wheel.

Now that we have returned from MIT we will be posting more information on the specifications and design of the wheelchair including information on the process used to fabricate the hubs and rollers for the mecanum wheel system we call Jester Drive.

19-06-2006 12:19

Freddy Schurr

Re: pic: Team 357's 2006 MIT InvenTeam

How did Team 357 do?

22-06-2006 12:03

OldDaddyCrane

Re: pic: Team 357's 2006 MIT InvenTeam

The competition portion of the process was in applying for and winning the grant. We were one of only 18 InvenTeams nationwide awarded grants for 2006. The trip to MIT was to showcase (much like a trade show) along with the other 17 teams and do a formal presentation.

The performance of the wheelchair at MIT was flawless. We were able to achieve complete holonomic drive using a custom circuit board with closed loop control.

More details to come...

22-06-2006 13:18

Rosiebotboss

Re: pic: Team 357's 2006 MIT InvenTeam

I was there for your demo with John Burns, my teacher counterpart on Rosie and my son, Kyle, (Rosie founder and the team's Dir of Eng back then) and I want to congratulate you folks publically. You all did a fine job, not only with the wheel chair, that was the easy part, but with the presentation portion of the event. It was brutally evident which teams were prepared and who was not. I have to think being a FIRST team put you ahead of the curve in engineering and presentation.

The reasons I love the Lemelson InvenTeam program so much to keep coming back is that one of the main problems engineers are faced with is communications. Typically, we are nerds that would rather be in the lab than on stage in front of an audience of people. This process of having to do a formal presentation forces the students to get on stage, see what it's like, get very valuable experience public speaking. You can have the best engineered product in the universe, but if you cannot communicate your ideas, then the investors will go elswhere with their capital. The whole process of Lemelson/MIT InvenTeams is to innovate, invent and communicate.

We were an InvenTeam in 2004 (Pothole detection and repair) and "raised the bar" back then. You folks bumped it up another notch by "aiming high."

22-06-2006 17:24

techtiger1

Re: pic: Team 357's 2006 MIT InvenTeam

[I have been meaning to comment on this thread for a while. Team 357 is one of the most organized teams ever as well as they have some amazing people on there team. There Jester drive is gorgeous I got a up close and personal look at it during the Florida regional and was blown away by it. The wheel chair looks amazing guys great job. Thanks to MIT for giving them the opportunity. All around amazing team and great project.

-Drew

08-07-2006 18:02

Spikr122

Re: pic: Team 357's 2006 MIT InvenTeam

Hello, I am a wheelchair user and i think that this is a great idea. I have the same question on the rotation.