Robonauts CAD
 

I've just found this out, and I thought I'd post it here because it was really useful for me.

The robonauts have put up CAD models of their 2007, 2009, 2011, and 2012 robots, which are really neat, very detailed, and some of the best CAD work I've ever seen from an FRC team. I now know how their massive gearbox in 2007 works!

You can download them from here
http://ccisdrobonauts.org/?w=1600&h=900&p=robots

Re: Robonauts CAD
 

I really wanted to see the CADs of their 2013 and 2010 robots. Hopefully that's going to happen.

(Also, those huge STEP files should probably be delivered compressed—they'll be about 10% of the size.)

Re: Robonauts CAD
 

Agreed on those request.

Also agreed on .zip for step files. It's AMAZING how efficiently they compress. It's fun actually.

Re: Robonauts CAD
 

there goes the rest of my day. Seriously love how amazing 118's bots are. I hope 118 post the CAD of the side bridge mechanism from 2012, that thing was really cool even though it got the ruled as illegal. Probably the most inspirational FIRST robot mechanism to only to be used in a practice match.

Re: Robonauts CAD
 

Yeah, looking back, that was totally unfair to make it illegal.

Re: Robonauts CAD
 

I wouldn't say totally unfair. The game manual did say no "grappling" on the bridges. Different people had different interpretations of what constituted grappling, and so by making the mechanism 118 took a risk.

Re: Robonauts CAD
 

This is incredible. I don't think a single robot has had a bigger impact on my team than Robonaut 2012, and now we can check out the CAD! Thanks so much to an incredible team for posting these models.

The unfair part is when multiple teams repeatedly asked FIRST for a definition of "grapple" and FIRST wouldn't provide it. The ruling on "grapple" in 2012 also relied on a different definition than 2011.

Re: Robonauts CAD
 

I was watching a piece on the BBC website about 3D printing this afternoon and noticed a short clip of a complete CAD of Endeavour as well as a closeup of a wheel I believe.

http://www.bbc.co.uk/news/technology-25101388

Re: Robonauts CAD
 

Wow, that's really cool! For those interested, 118 shows up around the 2:15 mark.

Re: Robonauts CAD
 

That is interesting...

I don't recognize that CAD operator or the area that he is working in. I wonder where that footage is from?

Ironically enough we didn't use 3D printed wheels. We 3D printed a positive mold tool then cast the wheels from a different plastic.

Still cool to have something I designed make it into the video though.

Also, we're working on updating the CAD files on the website. For now you can get them here:

https://www.dropbox.com/s/khh6lcfynt..._asm_6week.zip

Re: Robonauts CAD
 

Wow. The 2013 CAD is really impressive. I can't say that I've ever seen a cooler and more detailed CAD of any robot. Literally every thing on the robot is in the model.

I'm a huge fan of your gearbox. I don't think I've ever seen another team use a dog shifter between a gear and a sprocket.

Just out of curiosity, how do you guys work with these massive files? It took me a good 10 minutes just to open it, and I have to look at individual assemblies or it is too slow. Does solidworks do a better job than inventor with big assemblies? For me, inventor uses 5 gb of RAM just to have the file open.

Re: Robonauts CAD
 

Ditto, I'm having fun just exploring the model. SO many impressive details.

Question, I'm looking at the "Magic Maker", shooter angle flap. Why both the string and 10 turn pot? Redundancy? Flexibility to choose one or the other on the final product? Something I'm totally missing?

Another question, was Apex single speed? From what I can tell, the dog shifts between DT and Climb Wheel.

Thanks so much for posting these models! Can't wait to show my kids on Wednesday. This is inspiring stuff.

-Mike

Re: Robonauts CAD
 

We use Pro-E. The models get sluggish but people rarely work inside the complete model.

We divide the design and modeling tasks amongst the individual mentor leads. They're responsible for their sub-team's assemblies. We define a coordinate system for the robot...you essentially build your parts at your default location. When you bring each sub-assembly into the master you can drop it at "default" and it goes where it belongs.

Not everyone is a professional designer though, so we have one group that manages the master model and integrates to make sure we have no interference issues.

The "macker" or deflector used a pot for positioning. The string pot in the model is from an early design. Conceptual features aren't always removed from the model.

Re: Robonauts CAD
 

So I was examining this CAD model in all its glory, and I noticed that there weren't any visible chain or belt runs on the drivetrain.

At least until I looked inside the long chassis rails:


Maybe I'm missing something, but how did you get your chain in there? Also, did you have any issues with running 6 CIMs on the drivetrain (current draw popping the main breaker for example)?

Thanks for posting this model, really appreciate getting the opportunity to look at 118's amazing work!

Re: Robonauts CAD
 

They switched to 4 CIM + 2 Mini CIM after they took their climber off