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Unread 20-02-2014, 10:18
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Team 1339 Reveal

http://www.youtube.com/watch?v=BG3zcrWX0qA

The USS Defiant. Something a little different for your perusal.
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Unread 20-02-2014, 10:54
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Re: Team 1339 Reveal

Finally, another team with a pneumatic puncher! Defiant looks very well contained. My props to the students who helped build such a well performing machine
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Unread 20-02-2014, 10:59
DanielPlotas DanielPlotas is offline
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Re: Team 1339 Reveal

do the pick-up wheels spin when it is shot?
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Unread 20-02-2014, 12:02
IronBenderII IronBenderII is offline
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Re: Team 1339 Reveal

Cool robot but even cooler introduction to the video... Nice work team.
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Unread 20-02-2014, 12:26
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Re: Team 1339 Reveal

Very nice shooting mechanism. And glad to see another robot with a pneumatic punch.
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Unread 20-02-2014, 19:55
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Re: Team 1339 Reveal

It is not a pneumatic punch.
The wheels used for pickup are thrown into reverse and the piston just moves the ball into contact with the wheels.
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Unread 20-02-2014, 20:53
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Re: Team 1339 Reveal

Are the secondary banebot wheels behind the shooter wheels passive? It seems like they're there to keep the ball in.

Plus, that intro made me smile.
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Unread 20-02-2014, 20:59
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Re: Team 1339 Reveal

Quote:
Originally Posted by bEdhEd View Post
Are the secondary banebot wheels behind the shooter wheels passive? It seems like they're there to keep the ball in.
That is partially correct while it does help keep the ball in it also makes sure the ball is centered when picked up.
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Unread 20-02-2014, 21:11
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Re: Team 1339 Reveal

Ironic Dead Bird is correct. It is essentially a wheeled shooter, ala a pitching machine. The front wheels are both the intake and the shooter. The wheels behind them are unpowered dead axle, and are simply the holding mechanism (they hold very firmly; we tried to punch and kick the ball out and couldn't move it out). The pneumatics are for pushing the ball into the wheels.

Other notable features:
-3Cim Ball Shifters with 5.1:1 and 15.5:1 in an East Coast wheelbase
-sweet 1 1/4" x 4" Colsons, crown-flattened and with a lightweight hub straight from BaneBots. I will add pics of these later; they deserve a spotlight!
-220 degree arm rotation, picks up and shoots from the front or the rear
-nice 'n easy piston-only ground or kiss pass

Ask if you've got any other questions!
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Unread 20-02-2014, 23:52
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Re: Team 1339 Reveal

I like this design a lot - a very elegant way to do a double sided pickup/shooter. See you guys in Utah and Denver!
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Unread 21-02-2014, 00:04
Lil' Lavery Lil' Lavery is offline
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Re: Team 1339 Reveal

Glad a couple teams went through with this idea. I had toyed with the idea, but our initial proof of concepts with wheeled shooters had very poor results, and we didn't have the time or manpower to go further down that path. Part of me still wishes we did.

What speeds are you running your shooting wheels? How much compression?
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Unread 21-02-2014, 00:13
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Re: Team 1339 Reveal

Quote:
Originally Posted by Lil' Lavery View Post
Glad a couple teams went through with this idea. I had toyed with the idea, but our initial proof of concepts with wheeled shooters had very poor results, and we didn't have the time or manpower to go further down that path. Part of me still wishes we did.

What speeds are you running your shooting wheels? How much compression?
Thanks for the vote of confidence. We went this direction because, for us, our previous experience made it the most comfortable fit. It was really a lot easier for us than the other options we saw and/or prototyped.

We are running miniCIMs with a 4:3 reduction, so 4650 free speed. Compression is 4.75" on the nominal ball size.
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Unread 21-02-2014, 21:44
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Re: Team 1339 Reveal

Quote:
Originally Posted by IronicDeadBird View Post
It is not a pneumatic punch.
The wheels used for pickup are thrown into reverse and the piston just moves the ball into contact with the wheels.
Oh, well now it definitely seems a good many teams are using wheels either in their shooter or their ball intake mechanism.

Quote:
Originally Posted by D_Price
Very nice shooting mechanism. And glad to see another robot with a pneumatic punch.
Saw an image of your robot on your team Facebook page. How does yours work?
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Unread 25-02-2014, 14:55
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Re: Team 1339 Reveal

The Robot looks Awsome! Great Job!

We actually have a similar design and were wondering what you are using to power the wheels from the Cims. Is it V-belt, timing belt, chain? We tried using V-belt but are having a lot of problems with the Cim not being able to get past the friction in the V-belt and pulley. Do you have any suggestions?

Also what type of metal are your shooter arms made of? Is that just box aluminum?

Thanks so much! And Good Luck!
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Unread 25-02-2014, 15:57
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Re: Team 1339 Reveal

I like the shot of you punching a ball out of another robot, though they had the same color bumpers which is probably bad. I wonder how the referees will call something like this, it will be hard to tell if a team actually just hit the ball or if it hits part of the opponent robot inside their frame perimeter.
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