17-02-2010 22:37

Steven Sigley

Re: pic: Team 935's Chassis

It's not gonna crumple if a robot falls on it right? Plus why the 80-20?

I do like the triangular and circular cutouts but it seems like too much was taken out.

Is there an arm?

How much does it weigh?

Very interesting.

17-02-2010 23:12

FlyingHedgeHog

Re: pic: Team 935's Chassis

... How many CIMS is that? I think it might be over 5, and you're only allowed 5...

17-02-2010 23:16

EricH

Re: pic: Team 935's Chassis

I only see 4 CIMs, all on the drivebase. I also see a window motor in the far back corner.

17-02-2010 23:18

FlyingHedgeHog

Re: pic: Team 935's Chassis

Oh, I see. Sorry, these hours must really be getting to me.

17-02-2010 23:46

Hawiian Cadder

Re: pic: Team 935's Chassis

nice, a low mecanum robot that climbs, i wanted to do something like that but with non driven omni wheels, hope to see you compete

18-02-2010 00:00

p8blr

Re: pic: Team 935's Chassis

I wouldn't worry about that too much, it's been a robust concept since 2006.

http://team935.com/media.php?photos

18-02-2010 00:02

Andrew Bates

Re: pic: Team 935's Chassis

Why did you CNC so much? I only ask because to me it would make more sense to build a separate upper frame instead of extending the CNC so high up.

18-02-2010 00:06

Akash Rastogi

Re: pic: Team 935's Chassis

The last three posts of this thread pose similar questions and comments. Left unanswered to curious minds.

http://www.chiefdelphi.com/media/photos/34715

Their triangular pattern is very strong. Even with pocketing, the pattern plus the fact that it is quarter-inch 6061 allows their frame to be very rigid and strong. It will not "crumple."

18-02-2010 00:06

mjazzka

Re: pic: Team 935's Chassis

Hmm, VERY interesting. It appears to me that when your robot is flat on the ground (like it is now) the middle four, non-mecanum wheels, are off the ground? So that would mean that they are only for getting over the bump. At least, it LOOKS like the axis of the shafts are not the same (see below).

http://s950.photobucket.com/albums/a...a.jpg&newest=1

Other than that, I am curious to see how ya'll elevate/score, I can't tell from the photo...

Good luck this year!


-624

18-02-2010 00:21

Brandon Holley

Re: pic: Team 935's Chassis

To go along with some of the other comments here...

Where the bumper zone is on your robot appears to be the weakest area in terms of structure, at least from what I can tell from these pictures. We build our drivetrains (among other things) in a very similar manner as you guys. We use 1/4" aluminum plates, and use round standoffs to hold them together. This is what you have done in your drive system, but above the drive system there does not appear to be any standoffs. Seeing as this is where the bumpers will be, and thus most of your interaction with other robots will be, are you concerned about bending in that area?

Also, was that milled or waterjetted? If it was milled, I'd love to see some pictures of it in process if you have any.

-Brando

18-02-2010 00:25

IndySam

Re: pic: Team 935's Chassis

I think that is a work of art.

Are you planning on using shims for attaching bumper? Your gonna have to do something to make those wheel bearings and screws legal.

18-02-2010 00:38

J_Beth

Re: pic: Team 935's Chassis

well, wouldn't it make more sense to make it out of one part instead of having multiple parts that could break, and have to be made with close enough tolerances to fit together.

18-02-2010 01:09

p8blr

Re: pic: Team 935's Chassis

I wouldn't worry about that too much, it has proven to be a light, yet robust way of creating a custom chassis to the parts our bots require. Four years running with this design, and no structural failures yet.

http://team935.com/media.php?photos

18-02-2010 17:48

mjazzka

Re: pic: Team 935's Chassis

In SOME things that is true, but a whole robot? If this frame got hit hard (which it will), there is a good chance that it would bend. You cant replace a bent part of a robot that is one giant piece. Unless you have infinite quantities of those plates! And besides, building the robot with good ol' nuts and bolts is fun!

18-02-2010 23:12

J_Beth

Re: pic: Team 935's Chassis

Well, having been apart of this team for several years, we have never had a problem with getting our robot bent. And yes we have abused them, a lot! We are very proud of our plates, and they were completely designed by students to have low weight, but still retain their strength. We have the front and back plates made out of 3/8 aluminum, and the sides are 1/4 inch with braces that connect the two sets. So, there are also no shortage of good ol' nuts and bolts on this robot, so you don't have to worry about that.

19-02-2010 11:23

Steven Sigley

Re: pic: Team 935's Chassis

I'm still wondering why there's 80-20.


You have such a nice light chassis then all that weight in your kicker.

20-02-2010 00:44

mjazzka

Re: pic: Team 935's Chassis

Ah, well it sounds like you have a plan! 3/8 should work lol...If you say so, I'm sure it will be just fine! And about the wheels, are the middle four just for going over bumps? We never got clarified i don't think...

20-02-2010 00:53

Akash Rastogi

Re: pic: Team 935's Chassis

Actually, it is not just b/c they say so, it is because they are good at engineering. Read this again.


Condescending tones don't sound that great when discussing teams' designs by the way.