Re: [Ri3D] Team oRyon Presents Betelgeuse!!
 

H drive would be nice! But... its 3 days and not everyone can build an efficient Hdrive. I agree that H drive would be beneficial in some cases but it was not worth spending our time during the 3 days.

Re: [Ri3D] Team oRyon Presents Betelgeuse!!
 

Yes. Our fork is the least complete system on the robot. The imaginary next iteration would use a more robust sliding mechanism. We took the brute force approach and used two massive pistons to prove the concept.

Precisely! We recommend swapping out the front two wheels for traction wheels. You can still turn but you would be less "slidy" on the bump and your center of rotation would move forward towards the front of the robot which is desirable when manipulating totes.

Tried it yet? Last I checked it was still at Rice U. :D

Re: [Ri3D] Team oRyon Presents Betelgeuse!!
 

I think at about 1:40 in the video I see a CIM powered VersaPlanetary Gearbox directly driving a spool for your winching mechanism for your elevator. Can you confirm this? What is the final gear ratio in the gearbox and what diameter spool are you using?

Re: [Ri3D] Team oRyon Presents Betelgeuse!!
 

That is correct. 1:70 versa planetary (1:7 + 1:10). The spool is something we found in a box and adapted. Its OD is roughly 4 inches. I imagine something similar could be found on McMaster. The most important part of a spool in this application is the sidewall height. You don't ever want your cable to slip off the spool. See attached pic.

We drilled some holes in it in order to mount a vex pro hex hub and another hole in the side wall to tie off the 1/16th cable.

To fasten the cable to the spool we tied a simple knot around the hole spool (like the first knot when tying a shoe) and passed the end through the hole drilled in the sidewall. We used a swage crimp as the main means of fastening the cable. If you used swage crimps, make sure you use the proper size crimp that is designed for your diameter cable and use a proper swaging tool.

Re: [Ri3D] Team oRyon Presents Betelgeuse!!
 

Just to clarify: Is 4" the od of the flange, or the where the cable spools up?

Re: [Ri3D] Team oRyon Presents Betelgeuse!!
 

Well done for 3 days, guys. A great example of a highly functional robot that any team could make.

-Brando

Re: [Ri3D] Team oRyon Presents Betelgeuse!!
 

Where the cable spools up. An estimate =)

Re: [Ri3D] Team oRyon Presents Betelgeuse!!
 

Thanks a bunch this is very useful information :)

Re: [Ri3D] Team oRyon Presents Betelgeuse!!
 

Love the video, and the lightshow your robots put on. Well done.

Re: [Ri3D] Team oRyon Presents Betelgeuse!!
 

We have 86 likes on our release video! Lets get to 100! Watch the video! Like the video and spread the word!

http://youtu.be/0KOSkMz1hTA

Lets inspire the community! I would like all of the teams that are going to build something similar to make major improvements to our design!

Re: [Ri3D] Team oRyon Presents Betelgeuse!!
 

White paper! http://www.chiefdelphi.com/media/papers/3091?

Re: [Ri3D] Team oRyon Presents Betelgeuse!!
 

Are the arms on the lift a standard aluminum stock size? I can't seem to find much C-channel or angled aluminum that is smaller than 1" in either dimension.

Glad to see that some of the Ri3D teams arrived at similar design conclusions that our team did.

Re: [Ri3D] Team oRyon Presents Betelgeuse!!
 

2x1 ripped down the middle of the 1 inch side.

kept it .5 in order to fit between the totes in the landfill.

Re: [Ri3D] Team oRyon Presents Betelgeuse!!
 

That strategy is specifically why I ask. We will want to keep our arms fairly narrow for the landfill but I want more resistance to bending than a flat stock of 1/8" aluminum is going to have when we hit something hard while turning.

Thanks for the idea!

Re: [Ri3D] Team oRyon Presents Betelgeuse!!
 

Does the dimensions of your robot fit in the "Transport" frame? It appears that the wider dimension is across the forks and the shallower dimension is in line with the forks