05-02-2013 15:20

Boe

Re: pic: Team 3824 Chassis Pic 1

what is your frame made out of? Carbon Fiber?

05-02-2013 15:32

s_forbes

Re: pic: Team 3824 Chassis Pic 1

You can't post that and not tell us what it weighs! Very cool application of materials.

05-02-2013 15:48

SoccerTaco

Re: pic: Team 3824 Chassis Pic 1

The gold parts on the corners were printed on a 3D printer. The material is ULTEM. The cross members are carbon fiber.

Thanks! We think it is pretty cool too! It will be interesting to see how well it actually holds up in competition. Even if it does have some issues, trying something different has definitely been Inspiring to the team!

We did not weigh just the chassis as pictured - should have done that! But we did weigh last night with both our shooter and (as yet unproven 30 pt) climber and we were at 105. More than we expected!

05-02-2013 15:53

Nuttyman54

Re: pic: Team 3824 Chassis Pic 1

ULTEM is a really sweet material. Do you have any kind of core in the cross members, or is it hollow tube? And did you guys layup the fiber yourselves, or do you have a sponsor who made it?

I'm really curious to see how this holds up. It's a really unique setup, and the integrated gearboxes give you a ton of space in the center.

Major kudos to your team for pulling this off, it looks very professional.

05-02-2013 15:56

Madison

Re: pic: Team 3824 Chassis Pic 1

You've got your mecanum wheels on incorrectly, for what that's worth. It looks like the top two (in the picture) should be swapped.

05-02-2013 16:16

SoccerTaco

Re: pic: Team 3824 Chassis Pic 1

There are two carbon fiber tubes in the cross members. One of our sponsors did the layup for us.


Oops! I think the wheels were just slid on quickly for the photo op, they came back off while they worked on the electronics. It is driving well now, so they must have got it right when it counted!

05-02-2013 16:19

Kevin Sevcik

Re: pic: Team 3824 Chassis Pic 1

I'd double check it anyways. The rollers should make an X when you look at them from the top.

05-02-2013 16:31

mocibot

Re: pic: Team 3824 Chassis Pic 1

I'd also like to know whether or not you laid up the carbon fiber yourself, as my team does our own carbon fiber.

I do agree that it looks cool

Edit: Looks like my curiosity got answered before I managed to post. It still looks cool though

05-02-2013 18:01

AllenGregoryIV

Re: pic: Team 3824 Chassis Pic 1

What gearboxes are you using and are those miniCIMs, they look a bit short?

06-02-2013 00:12

SoccerTaco

Re: pic: Team 3824 Chassis Pic 1

I'm hoping we are able to do that next year. One of our students went over and worked with our sponsor, and we are hoping to have a team of students back to do more. Next year, I'm hoping they can help other teams in our area interested in trying this.

Yep, those are the minis. It is one of the Banebot gearboxes.

06-02-2013 10:45

thefro526

Re: pic: Team 3824 Chassis Pic 1

Ultem is such a cool material.

Just out of curiosity, how do you itemize it in the BOM? Do you include just the cost of the material required to make the part? Or do you factor in the support as well?

06-02-2013 11:13

Toa Circuit

Re: pic: Team 3824 Chassis Pic 1

This... looks awesome. So superb. I'm jealous.
One thing though: Aren't we only allowed TWO mini CIMs?

06-02-2013 11:19

Siri

Re: pic: Team 3824 Chassis Pic 1

R32 allows a total of 4 mini-CIMs + BAG motors.


Loving the carbon fiber. We lay it up for panels (shooter base/box, electronics mounting, etc), but hadn't thought about tubes as structural members. Do you know what the layers are, specifically? Where does it strain?

Just a note - If the sponsor employees are not team members, then labor costs are included in the BOM price (R14).

06-02-2013 12:28

SoccerTaco

Re: pic: Team 3824 Chassis Pic 1

We include just the cost of materials. The printers are in the same facility where our team (as well as other area teams) meets. One of our mentors and some of the students do all the work associated with the printing.

I'm sorry, I do not know the specifics. I'll try to find out.

06-02-2013 12:36

SoccerTaco

Re: pic: Team 3824 Chassis Pic 1

I'll re-read R14 and make sure we account for it correctly.

06-02-2013 12:38

ToddF

Re: pic: Team 3824 Chassis Pic 1

Don't forget this important paragraph in the R14 blue box:
It is in the best interests of the Teams and FIRST to form relationships with as many organizations as possible. Teams are encouraged to be expansive in recruiting and including organizations in their team, as that exposes more people and organizations to FIRST. Recognizing supporting companies as Sponsors of, and members in, the Team is encouraged, even if the involvement of the Sponsor is solely through the donation of fabrication labor.

06-02-2013 14:08

Siri

Re: pic: Team 3824 Chassis Pic 1

Yep. Based on the description of the printing process, I'd venture they have it correct now. We've been down this before, and my litmus test tends to be 'do the boss and the employees doing the work know who we and FIRST are?' i.e. have I created a mutual relationship, or am I just a customer?