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Unread 27-01-2008, 17:07
7-11number1 7-11number1 is offline
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Team 1711 prototype

http://www.flickr.com/photos/23220170@N07/

Heres a few images of the robot design we've created. The "jaws" are pneumatically operated and grab the ball loading it to the arm. When the arm is raised the ball is parallel with the over pass and the upper jaw launches it over. We originally were going to use 2 tread wheels and 2 mechanums but then opted for all mechanum. Questions comments or suggestion are appreciated.
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Unread 27-01-2008, 17:10
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Re: Team 1711 prototype

looks awesome!

do you stay within the 80" rule?
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Unread 27-01-2008, 17:24
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Re: Team 1711 prototype

we stretch out to 81 inches when the arm lifts up and is in possession of a ball. Luckily its the third week so we can adjust for that
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Unread 27-01-2008, 17:28
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Re: Team 1711 prototype

very impressive
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Unread 27-01-2008, 17:32
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Re: Team 1711 prototype

Very clever design! I'd love to see a movie of it doing it's thing, it looks like it would be very fun to watch.
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Unread 27-01-2008, 17:32
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Re: Team 1711 prototype

Quote:
Originally Posted by 7-11number1 View Post
we stretch out to 81 inches when the arm lifts up and is in possession of a ball. Luckily its the third week so we can adjust for that
Remember it's not 80" long it's fitting into a 80" circle.


BTW I love the design.
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Unread 27-01-2008, 17:36
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Re: Team 1711 prototype

we have a freakishly similar design....may i ask what material you used for the "jaw"....also how do you close it up to fit inside starting position.....congratulations on an amazing looking robot

here is our design (sadly we dont have anyone experienced with CAD) so we use chalk and a board...the design is to scale..we have a protoype, much like yours except with a different method of gripping the ball (we used PVC...i dont personally like the pvc idea i like yours much better)

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Unread 27-01-2008, 17:37
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Re: Team 1711 prototype

Quote:
Originally Posted by IndySam View Post
Remember it's not 80" long it's fitting into a 80" circle.

No it's not. You may not have any two points more than 80" apart (horizontally).
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Unread 27-01-2008, 17:42
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Re: Team 1711 prototype

That's neat! uses up a lot of air though, doesn't it? we are also dealing with air consumption issues
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Unread 27-01-2008, 17:43
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Re: Team 1711 prototype

Quote:
Originally Posted by Jaybee1405 View Post
No it's not. You may not have any two points more than 80" apart (horizontally).
<R16> Once the MATCH has started, the ROBOT may assume a PLAYING CONFIGURATION that exceeds the size dimensions specified in Rule <R11>. While in the PLAYING CONFIGURATION, the ROBOT may expand up to a maximum horizontal dimension of 80 inches (e.g. all parts of the ROBOT must fit within an imaginary 80-inch-diameter upright cylinder).

Read this http://www.chiefdelphi.com/forums/sh...&highlight=r16
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Unread 27-01-2008, 17:45
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Re: Team 1711 prototype

We've been thru the 80" rule discussion in a few different threads...and the Q&A addresses it also....the circle thing is an example, but the rule says only that you can't have two points further apart than 80" in a horizontal direction.

Measuring this can be a bit difficult.
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Unread 27-01-2008, 17:47
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Re: Team 1711 prototype

oh and can i reccomend you use the same tread that u used for the traction wheels as ball "grippers" they grab the ball like no other
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Unread 27-01-2008, 17:48
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Re: Team 1711 prototype

Quote:
Originally Posted by IndySam View Post
<R16> Once the MATCH has started, the ROBOT may assume a PLAYING CONFIGURATION that exceeds the size dimensions specified in Rule <R11>. While in the PLAYING CONFIGURATION, the ROBOT may expand up to a maximum horizontal dimension of 80 inches (e.g. all parts of the ROBOT must fit within an imaginary 80-inch-diameter upright cylinder).

Read this http://www.chiefdelphi.com/forums/sh...&highlight=r16
I was told by an official FIRST regional inspector that it is not an upright cylinder. The shape is more like a very high piece of pie (ex. take an 80" long piece of extrusion and make a sweep from the farthest point.

Thank you Squirrel.
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Unread 27-01-2008, 18:54
7-11number1 7-11number1 is offline
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Re: Team 1711 prototype

Quote:
Originally Posted by esisso View Post
we have a freakishly similar design....may i ask what material you used for the "jaw"....also how do you close it up to fit inside starting position.....congratulations on an amazing looking robot

here is our design (sadly we dont have anyone experienced with CAD) so we use chalk and a board...the design is to scale..we have a protoype, much like yours except with a different method of gripping the ball (we used PVC...i dont personally like the pvc idea i like yours much better)

The Jaws are made from some AL pipes one of our mentors shop had lying around. As to fit in the starting dimensions the Jaws fold up against the arm almost vertically. Its just barely under height restriction and the 80in rule is a little touchy for us. Were gonna have to bend or shorten the jaws slightly
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Unread 27-01-2008, 21:06
7-11number1 7-11number1 is offline
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Re: Team 1711 prototype

Quote:
Originally Posted by esisso View Post
we have a freakishly similar design....may i ask what material you used for the "jaw"....also how do you close it up to fit inside starting position.....congratulations on an amazing looking robot
We used 1" electrical conduit and a pipe bender. Also, if you use conduit, DO NOT DRILL THROUGH IT or flatten it. Use pipe clams to avoid creating potential failure points. Note: Last year at the Michigan regional a team constructed an arm out of PVC and it snapped.
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