pic: 6WD Chassis

[Tom Line]

You're going for the wide chassis footprint rather than the narrow.

You don't need 6 wheels to rocker a wide chassis - it turns fairly well with 4.

[Rion Atkinson]

Originally Posted by Tom Line

You're going for the wide chassis footprint rather than the narrow.

Actually. I will be designing a narrow as well. I figured I would "perfect", so to speak, the wide chassis first.

Originally Posted by sanddrag

I would definitely keep 1/8" wall for the outside perimeter, and I would question the need for that upper deck.

The upper deck is actually what I used to mount the AM SS....

[BrendanB]

One suggestion, I wouldn't have the C'rio up against the front in case you get a hard it. It happens a lot. I don't think any team wants to have the most expensive piece of there robot be destroyed.

[Dillon Carey]

What is the indent in the front for?

[Rion Atkinson]

Originally Posted by Dillon Carey

What is the indent in the front for?

Nothing really.. I could move it forward, but there is really no need.. Save weight! (Even if only around .5 lbs...)

[Dillon Carey]

Originally Posted by Formerly Famous

Nothing really.. I could move it forward, but there is really no need.. Save weight! (Even if only around .5 lbs...)

Ok, i was thinking you were trying to plan ahead for some sort of pick up system.

[Taylor]

I assume the tabs along the sides are for bumper attachment. Given the limited hand space there, are you thinking cotter pins through bolts to hold them on?

[kramarczyk]

Originally Posted by Akash Rastogi

Actually, many teams mounted their cRIO that way and even perpendicular to the ground. Even without zipties, I don't think any team had loose modules or a broken cRIO. It can take impacts pretty well.

Yeah, the cRio has been known to take a beating.
http://decibel.ni.com/content/docs/DOC-6176

Originally Posted by Taylor

I assume the tabs along the sides are for bumper attachment. Given the limited hand space there, are you thinking cotter pins through bolts to hold them on?

We used some quick release pins from McMaster-Carr (p/n 98320A140) on two robots this year. No bottom access required. We had zero perfomance issues and zero inspection issues (some of the inspectors actually liked them).

[AndyB]

Originally Posted by kramarczyk

Yeah, the cRio has been known to take a beating.
http://decibel.ni.com/content/docs/DOC-6176

Very interesting. I knew the cRio could take a hit, but that's unbelievable.

I would have no concerns about moving your cRio. Just make sure it's easy to access.

You'd be safe using 50 lb/ft^3 density for your wood panel. Aluminum is about 3 times that (I just looked up the densities for for particle board and 6061 aluminum for these numbers). http://www.engineeringtoolbox.com/wo...sity-d_40.html has a list of densities for various types of wood.

[Rion Atkinson]

Originally Posted by AndyB

You'd be safe using 50 lb/ft^3 density for your wood panel. Aluminum is about 3 times that (I just looked up the densities for for particle board and 6061 aluminum for these numbers). http://www.engineeringtoolbox.com/wo...sity-d_40.html has a list of densities for various types of wood.

The only problem is wood is not an option to choose from.. And I don't if you can manually change the density in Inventor...

[EricH]

Originally Posted by Formerly Famous

The only problem is wood is not an option to choose from.. And I don't if you can manually change the density in Inventor...

You can. I forget how, but you can. And if wood isn't an option, then I just lost respect for Inventor. You go into the properties, and pick your type of wood--pine or oak should do the trick. (It doesn't have "wood" as an option because every wood is a different type of wood, and has a different density.)

[MrForbes]

Somehow we modeled ours in Inventor last winter...huh....

http://www.chiefdelphi.com/forums/sh...ad.php?t=71902

[Rion Atkinson]

Originally Posted by EricH

And if wood isn't an option, then I just lost respect for Inventor. You go into the properties, and pick your type of wood--pine or oak should do the trick. (It doesn't have "wood" as an option because every wood is a different type of wood, and has a different density.)

I went through all materials. Not a single type of wood. In the 2009 Inventor There was. They were listed as "Wood (Pine)" or "Wood(Oak)". But when they upgraded to 2010 they must have take it out...

Originally Posted by squirrel

Somehow we modeled ours in Inventor last winter...huh....

It is possible to just change the texture (As I did). But odds are you made it in 2009.

[BrendanB]

Originally Posted by kramarczyk

Yeah, the cRio has been known to take a beating.
http://decibel.ni.com/content/docs/DOC-6176
[/IMG]

WOW!!!!

That really does take a beating. Guess I now know what is the strongest part of the robot.

[Rion Atkinson]

Originally Posted by Dillon Carey

Ok, i was thinking you were trying to plan ahead for some sort of pick up system.

That was the original plan, but there isn't really enough room... I could always make the chassis bigger than 35 x 25...

Originally Posted by Taylor

I assume the tabs along the sides are for bumper attachment. Given the limited hand space there, are you thinking cotter pins through bolts to hold them on?

Pretty much yes.