Sunday, January 06, 2008

we've kicked off!

hello!

the 2008 season has begun! build and programming are working together on the design process, so i've posted this to both blogs.

caroline, me, allie, and nandini headed down at the crack of dawn (literally...) saturday to recieve the challenge from sj state. this year's challenge, first overdrive, is different from any other challenge. effectively, it's a racetrack with oversized inflatable balls. these are the game pieces. it's really hard to describe - search for first overdrive 08 on youtube and you should find something. i think this should link to it: http://youtube.com/watch?v=GKBIEqY2Ak4

we had a great turnout for brainstorming session at school saturday. many mentors came, and thank you for that. we broke into groups and came up with many rough ideas.

then, today, with a smaller turnout (allie, caroline, anndini, annie c, sallie, crystal, mari, neli, me...) we presented our design ideas and began to PROTOTYPE! the two main arm concepts at this point are the shoulder-elbow-wrist extendable design, as recommended by jimmy and a forklift. very rough prototyping with 80/20 ensued. allie and i also put together the kit chassis as a prototype.

things to think about:
what is going to grip that thing? the ball is huge, and fairly slippery.
what is our overall strategy? i know we're hoping to go over rather than under the overpass, but are we going to place it on top at the end?
what's our priority?
hybrid?
sensors?
we've been discussing many different concepts for a drive train. obviously, scotty's will not work. we can't almost tip over every time we turn...

possibilities:
-mecanum wheels. like jester drive (is it possible to buy them? how difficult is the programming?)
-omni wheels (again. expensive. no experience with them)
-omni wheel/traction wheel combo. we saw a lot of this in atlanta
-power steering two smaller front wheel
-combination of casters and driven wheels
-anything i've forgotten

this is something we'll have to continue to think about.

oh, there's a schedule of deadlines on the project room whiteboard. that will come soon. we deffffinitely need to be testing far earlier this year, and spend less time on prototyping. i know we're hoping to have parents help out to build an overpass, and we want to make good use of that.

uh, also, can we get that leak in the closet taken care of? ...it makes me nervous.

a HUGE THANK YOU to doug for generally being an amazing source of information as well as providing the books and tools necessary. those hex screwdrivers will make everything so much easier. :D
also thanks to karlin for coming in to help us talk through concepts, and marsha abbott for chaperoning and yummy dips for the pita, as well as the costco run.

get ready for season! i'm excited. hopefully you are too. :)

1 comment:

Guy said...

You can buy Mecanums from AndyMark, at almost $400 for a set of either 6" diameter or 8". They also have both Aluminum and Plastic omniwheels.

We're still brainstorming everything. I'm kidna focusing on hybrid mode and sensors to try and figure out what code I write. If you want to brainstorm the sensors and control part together at some point let me/us know. That might not be easy as we'll have different robots and drive trains, but maybe there's some stuff to be learned.

-Guy Davidson, Paly Robotics