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Unread 25-01-2015, 03:14
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asid61 asid61 is offline
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AKA: Anand Rajamani
FRC #0115 (MVRT)
Team Role: Mechanical
 
Join Date: Jan 2014
Rookie Year: 2013
Location: Cupertino, CA
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Re: TEAM2980 Open Source Robot Thread

Quote:
Originally Posted by eedoga View Post
So...a couple of things in response to questions that have been brought up about our team and robot.

Our design process is a bit abnormal...

Right after kick off we divide up into four separate teams. Each team designs a robot using a worksheet that our team uses.

https://docs.google.com/document/d/1...it?usp=sharing

Each team then does a CADD mock up using autodesk inventor during week 1. On Friday night we invite the community. This year we had over 100 people show up for this event.

Each team presents their idea in a 10 minute presentation, and then the entire team leaves the room.

The community including some graduated team members then argue about which design the team should build. This year they chose two different designs and combined them. (We will post the video of this soon...We are waiting for our Video Productions class to finish editing it down.)

We then spend week 2 doing a final CADD of the entire robot. We also use some of this time to prototype things to see what works.

Then we get to work actually building a robot. Week 3 is for Fabrication, and week 4 is for final assembly. We are pretty well on schedule at this point having finished welding our base frame today, and cutting out most of the parts for both lifting mechanisms.

So...This years robot.

We are using 1 lift mechanism to try to do a 3 tote autonomous stack. The plan is to pick up 2 of the totes, and then push the third into position dropping the two we lifted down on top of it. We are planning 3 seconds per tote with a few seconds in between which we understand is ambitious.

We then have a multi-purpose lift mechanism which we plan to use for totes and recycle bins.

We are using a halonomic(sp?) drive base.

Earlier in the thread we linked to a Github which has all of our CADD files posted in it. We have also posted renders of our robot. We will post more in the next few days.

Currently our base is driving around. we will be adding to it tomorrow...

We will post more at the end of the day.

best of luck to all teams.

Edoga
That's holonomic BTW.
By "the community" do you mean FRC people or parents/ kids etc? Becuase every year we do get input from parents and such during design reviews, but many ideas suggested show a sever lack of experience doing this sort of mechanical stuff (we have plenty of electrical engineers, though).
It looks pretty sweet either way though, and pretty bulletproof. Your elevator is a little less strong that it could be IMO, but I really don't know if you will have any issues. We are using bearings on three sides of the walls of our elevator.
3 seconds/ tote might be tricky if you can't position the arm quickly. One side of your robot needs to pull a stack into it, and the other side needs to laign the tote properly. Either of these tasks can be difficult.
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