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Unread 03-05-2015, 19:42
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RoboChair RoboChair is offline
He who fixes with hammers #tsimfd
AKA: Devin Castellucci
FRC #1678 (Citrus Circuits and 5458 Digital Minds)
Team Role: Mentor
 
Join Date: Jan 2007
Rookie Year: 2005
Location: Davis, CA
Posts: 638
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Re: Development of 1678's Can Grabber

Quote:
Originally Posted by dougwilliams View Post
Very impressive development! I have two questions -

1- earlier in the season you had a release video with all 4 cans being taken - and people were guessing you were using some sort of tape measure system.

Was that in fact, the original 4 can wind-surfing system?

2- In this video

https://www.youtube.com/watch?v=P8t-SM8cK0E

It looks like you have a motorized pivot for the pole - if that's correct can you say a bit more about that? And you eventually switched to surgical tubing? And, it looks like the poles are extending as they pivot and retract, can you describe that mechanism a bit more?

Thanks, and congratulations!
In the video Can Grab 4 the system mounted to the robot is the teaser video system that we used.

As for #2 it was just directly attached to an output shaft that cranked hard of the arm to accelerate it quickly. The switch to surgical tubing was only mad for our Champs grabbers. The extension was done by anchoring a string to the body of our robot and to the INSIDE of the arm at the bottom, as the arm comes down it pulls on the string and causes it to extend. The top of the square tubing has bearings in place as does the bottom inside of the round tubing so it slides properly and does not rotate.
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11 Years and counting! Over a third of my life has been spent with FRC.