Team 1339 Reveal
 

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

The USS Defiant. Something a little different for your perusal.

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 :cool:

Re: Team 1339 Reveal
 

do the pick-up wheels spin when it is shot?

Re: Team 1339 Reveal
 

Cool robot but even cooler introduction to the video... Nice work team.

Re: Team 1339 Reveal
 

Very nice shooting mechanism. And glad to see another robot with a pneumatic punch.

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.

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.

Re: Team 1339 Reveal
 

That is partially correct while it does help keep the ball in it also makes sure the ball is centered when picked up.

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!

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!

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?

Re: Team 1339 Reveal
 

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.

Re: Team 1339 Reveal
 

Oh, well now it definitely seems a good many teams are using wheels either in their shooter or their ball intake mechanism.

Saw an image of your robot on your team Facebook page. How does yours work?

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!

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.