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-   -   842 Kicker On Bot (http://www.chiefdelphi.com/forums/showthread.php?t=81275)

MrForbes 28-01-2010 23:51
Re: 842 Kicker On Bot
 
Do you do that by controlling how much air it gets? timing the opening/closing of the solenoid valves?

dude__hi 28-01-2010 23:57
Re: 842 Kicker On Bot
 
Quote:
Originally Posted by squirrel (Post 909037)
Do you do that by controlling how much air it gets? timing the opening/closing of the solenoid valves?
Yes, in the game from 2 years ago when we used a similar pneumatic shooter design to launch the large ball over the scaffold we would sometimes get really bad shots and the ball would shoot short. This time we're having the robot do that intentionally in order to vary the distance it kicks.

In short, the amount of time the valve is open varies the amount of strength we use to make contact with the ball.

Ed Law 29-01-2010 00:07
Re: 842 Kicker On Bot
 
Team 842,

That is an awesome kicker design. I now understand how one can use springs (surgical tubes) to assist to get the piston come out faster. I also learned about pre-charging (pressurizing) and how you use the gate latch to hold it.

Can you tell me in your set up, if the maximum distance by doing everything you are doing is 20 feet, what is the distance if you do not pressurized the kicking cylinder and just activate the solenoid valve? Did you also try to pressurize the kicking cylinder but take out the elastic cords. We are very behind right now and will not have time to try out all these things. Any help from any team will be appreciated.

nitneylion452 29-01-2010 00:12
Re: 842 Kicker On Bot
 
Quote:
Originally Posted by Ed Law (Post 909048)
Team 842,

That is an awesome kicker design. I now understand how one can use springs (surgical tubes) to assist to get the piston come out faster. I also learned about pre-charging (pressurizing) and how you use the gate latch to hold it.

Can you tell me in your set up, if the maximum distance by doing everything you are doing is 20 feet, what is the distance if you do not pressurized the kicking cylinder and just activate the solenoid valve? Did you also try to pressurize the kicking cylinder but take out the elastic cords. We are very behind right now and will not have time to try out all these things. Any help from any team will be appreciated.
Right now, we are using only a pneumatic cylinder to power our kicker and it's not working too well (about 1.5 ft max distance in the air). We're going to try pressurizing with a gate latch this weekend and try and add some surgical tubing. Hopefully we'll get a similar result as what's in the video.

dude__hi 29-01-2010 00:15
Re: 842 Kicker On Bot
 
Quote:
Originally Posted by Ed Law (Post 909048)
Team 842,

That is an awesome kicker design. I now understand how one can use springs (surgical tubes) to assist to get the piston come out faster. I also learned about pre-charging (pressurizing) and how you use the gate latch to $@#$@#$@#$@# it.

Can you tell me in your set up, if the maximum distance by doing everything you are doing is 20 feet, what is the distance if you do not pressurized the kicking cylinder and just activate the solenoid valve? Did you also try to pressurize the kicking cylinder but take out the elastic cords. We are very behind right now and will not have time to try out all these things. Any help from any team will be appreciated.
The shortest kick we achieve is done by having the cylinder vented on both sides and relying on just the tension force from the elastics that are attached.

Using the elastics doubled our range. What we did was use as much elastic force as possible while still being able to retract the cylinder pneumatically.

falconmaster 29-01-2010 11:21
Re: 842 Kicker On Bot
 
Quote:
Originally Posted by Ed Law (Post 909048)
Team 842,

That is an awesome kicker design. I now understand how one can use springs (surgical tubes) to assist to get the piston come out faster. I also learned about pre-charging (pressurizing) and how you use the gate latch to hold it.

Can you tell me in your set up, if the maximum distance by doing everything you are doing is 20 feet, what is the distance if you do not pressurized the kicking cylinder and just activate the solenoid valve? Did you also try to pressurize the kicking cylinder but take out the elastic cords. We are very behind right now and will not have time to try out all these things. Any help from any team will be appreciated.
1. with just elastic we get more of small hop and roll effect any where from 2 to 5 feet
2. With just air no pre-pressurizing and locking it at 4" before releasingwe get about 5 feet- to 7 feet
3. with pre-pressurizing we get 18 to 20 feet

kE7JLM 29-01-2010 11:51
Re: 842 Kicker On Bot
 
Quote:
Originally Posted by Valkyries_698 (Post 908635)
good stuff 842, I can't wait to see your robot at comp. Are you guys coming to Duel in the Desert?
Yeah, we'll be there with both our bots. A large portion of our team will be missing due to other school stuff...


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