Chief Delphi

Chief Delphi (http://www.chiefdelphi.com/forums/index.php)
-   Robot Showcase (http://www.chiefdelphi.com/forums/forumdisplay.php?f=58)
-   -   4183's Full Auto Shooter (http://www.chiefdelphi.com/forums/showthread.php?t=112761)

nixiebunny 04-02-2013 20:30

4183's Full Auto Shooter
 
We decided to see how fast we could shoot a bunch of Frisbees. The shooter is a standard dual 8" pneumatic wheel one, with a mini-CIM and a CIM in direct drive. We got our speed control working today. The code fires the next Frisbee as soon as the speed recovers.

http://www.youtube.com/watch?v=AfY-uYwHv50

The distance is half court.

arun4444 04-02-2013 22:38

Re: 4183's Full Auto Shooter
 
class 1 laser?

z_beeblebrox 04-02-2013 22:40

Re: 4183's Full Auto Shooter
 
Illegal but temporary laser. Our real robot uses the pyramid or the camera to align.

z_beeblebrox 04-02-2013 23:00

Re: 4183's Full Auto Shooter
 
More of our progress:


CAD of final robot; should be submitted to sheet metal shop tomorrow-ish. Doesn't show shooter support/ tilting/ hanging mechanism



Prototype robot featured in video. Built on off-season drivetrain. Prototype intake in bottom-left corner.



Driver station, complete with our custom game-pad/ pistol grip controller and my precious, fluffy dog.

200th POST!!!

DELurker 05-02-2013 12:46

Re: 4183's Full Auto Shooter
 
Looks good. Seems like you have some vibration in the system, though ... ;)

nixiebunny 05-02-2013 17:58

Re: 4183's Full Auto Shooter
 
...
Quote:

Looks good. Seems like you have some vibration in the system, though ...
Indeed. We need to find a tire shop that can balance a tire on a 4 inch rim.

We have made a fair attempt at it using some screws as counterweights taped inside the rim opposite the valve stem.

Siri 05-02-2013 18:03

Re: 4183's Full Auto Shooter
 
Quote:

Originally Posted by nixiebunny (Post 1228293)
We have made a fair attempt at it using some screws as counterweights taped inside the rim opposite the valve stem.

When you say taped, you don't mean 'adhesive attempting to hold pointy metal objects onto a wheel spinning at 6,000 RPM', do you?

Please be safe ::ouch:: Even duct tape cannot guarantee safety here.

Awesome shooter, though! And very cute dog.

kuraikou 05-02-2013 23:37

Re: 4183's Full Auto Shooter
 
When you see the shooter from a non first person mode it doesn't vibrate as much as it appears in the video, especially for a prototype made of wood and bolts.

nixiebunny 06-02-2013 00:19

Re: 4183's Full Auto Shooter
 
Quote:

Originally Posted by Siri (Post 1228296)
When you say taped, you don't mean 'adhesive attempting to hold pointy metal objects onto a wheel spinning at 6,000 RPM', do you?

Yes, they are held in place *inside* the rim with double-sided foam poster mounting tape. The centrifugal force of spinning presses the screws more tightly into the tape. In order to fall out, they'd have to violate a couple of the laws of physics.

We will use hot glue to install them on the final assembly.

Jackladd 08-02-2013 23:09

Re: 4183's Full Auto Shooter
 
Quote:

Originally Posted by nixiebunny (Post 1227575)
We decided to see how fast we could shoot a bunch of Frisbees. The shooter is a standard dual 8" pneumatic wheel one, with a mini-CIM and a CIM in direct drive. We got our speed control working today. The code fires the next Frisbee as soon as the speed recovers.

http://www.youtube.com/watch?v=AfY-uYwHv50

The distance is half court.

I'm digging the earthquake simulator your robots also works as.

apm4242 05-04-2013 07:56

Re: 4183's Full Auto Shooter
 
Quote:

The code fires the next Frisbee as soon as the speed recovers.
How are you reading the motor speed and sending it to the code with direct drive?

Bruceb 05-04-2013 14:01

Re: 4183's Full Auto Shooter
 
Here is 706's full auto shooter. We slow it down an auton but watch after that. Driver justs holds the trigger down.
Sorry if you have seen this already, I just think it is so cool.


Bruceb 05-04-2013 14:01

Re: 4183's Full Auto Shooter
 
dang it this link didnt show up
http://www.youtube.com/watch?v=zViWA9QbeJ4

ykarkason 05-04-2013 15:12

Re: 4183's Full Auto Shooter
 
Quote:

Originally Posted by Bruceb (Post 1257499)
dang it this link didnt show up
http://www.youtube.com/watch?v=zViWA9QbeJ4

Cool! I liked how fast it recovers!
Are you using a bang-bang controller or a PID controller?
If it's a PID, how much time did you spend on optimizing it?

TheOtherGuy 05-04-2013 22:30

Re: 4183's Full Auto Shooter
 
Quote:

Originally Posted by apm4242 (Post 1257436)
How are you reading the motor speed and sending it to the code with direct drive?

We're using optical switches. A small metal tab passes through it once a revolution and we measure the time between pulses to determine the RPM.


All times are GMT -5. The time now is 19:47.

Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi