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Unread 10-02-2009, 00:07
jgraber jgraber is offline
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Re: Pearce Practice Day Success!

Quote:
Originally Posted by Pavan Dave View Post
I have uploaded the longest clip I have of robots on the field. However I would appreciate it if you would all stop being critical of the robots there ... Without further ado:
http://www.youtube.com/watch?v=yRAMaqQhVJw

Enjoy!
The Orange bumper people know about the 6" rule and plan to modify their bumper, although we did not discuss the aspect of the non-bumper part needing to be separate for weighing.

I'm a mentor for team 2743, with the Green bumpers. Those bumpers are an example of what happens when you wrap the bumpers around the corner, rather than cut them in some way: lots of unwrap force! The front bumpers are exactly 6", but not mounted securely in front. Because of the temporary electronics mounting, #2743 was not able to check trailer nesting correctly, but likely the front bumpers will need adjustment/enlargement to avoid trailer pole contact.
New 18 lb bumpers with solid left and right side Green bumpers are planned, with cut noodle corners rather than wrapped.

An interesting side effect of the practice: Since none of the driving robots had ball handling equipment currently installed, all the 'points' scored were scored by human players, none by robots. Therefore, one can conclude that only humans will score points in a real game also.

Other observations from that practice:
I saw 5 teams, only 2-3 were driving, only one had any kind of ball handling installed.
All driving teams were in 4w drive wide config.
One team not yet driving was in 2w narrow config.
I saw no traction control running.
I saw no steerable wheels.
Drag race between 4cim and 2cim bots showed insignificant difference.
Pushing contest between Green 86 lb robot and Orange 82? lb robot was slightly won by Green.
Pinning tests between Green and Orange showed that either could eventually escape being pinned at the wall.
The 2/3rds field seemed crowded with 2 robots and 20 balls on the field, it is hard to imagine how crowded a full field with 6 robots and 100+ balls will be.
Orange team had some excellent basketball-trained human players.
One orbit ball exploded into individual rings as it was being thrown by gripping the rings (rather than cupping the ball as if it were solid).
The orbit ball barely fits through the Outpost shield wall hole, doesn't seem possible to throw it through that hole to the diagonal opposite corner.
Green battery connection fell apart in middle of driving, possibly due to being hit by a ball. We need to use Zip ties for competition!
Green CIM key fell out, team moved to a lighter colored floor tile to work on it, to make pieces easier to find on the floor. Since we didn't bring any tools (!) of our own, thanks to the other teams that graciously loaned us some tools and washers to rebuild our Toughbox. We plan to use set-screw locking collars to hold in the keys for competition.
Due to our exposed electronics, no high-speed head to head collisions were performed. A common manuever seemed to be two robots circling and chasing each other's trailers.
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