Go to Post GO OUTSIDE, OR SOMETHING. Go do something other than FIRST for a little while - after all, in January, your life is consumed! - Libby K [more]
Home
Go Back   Chief Delphi > Technical > Pneumatics
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
Closed Thread
Thread Tools Rate Thread Display Modes
  #1   Spotlight this post!  
Unread 17-08-2010, 21:01
pfreivald's Avatar
pfreivald pfreivald is offline
Registered User
AKA: Patrick Freivald
FRC #1551 (The Grapes of Wrath)
Team Role: Mentor
 
Join Date: Jan 2007
Rookie Year: 2001
Location: Naples, NY
Posts: 2,304
pfreivald has a reputation beyond reputepfreivald has a reputation beyond reputepfreivald has a reputation beyond reputepfreivald has a reputation beyond reputepfreivald has a reputation beyond reputepfreivald has a reputation beyond reputepfreivald has a reputation beyond reputepfreivald has a reputation beyond reputepfreivald has a reputation beyond reputepfreivald has a reputation beyond reputepfreivald has a reputation beyond repute
Pneumatic Dump Valve for T-Shirt Launcher

Can anyone recommend a pneumatic dump valve -- preferably solenoid controlled -- for a T-shirt launcher? We're looking for lots of air flow and rated for 100-ish PSI.

Thanks!

Patrick
__________________
Patrick Freivald -- Mentor
Team 1551
"The Grapes of Wrath"
Bausch & Lomb, PTC Corporation, and Naples High School

I write books, too!
  #2   Spotlight this post!  
Unread 18-08-2010, 10:31
Josh Adkins's Avatar
Josh Adkins Josh Adkins is offline
Registered User
FRC #3138 (Innovators Robotics)
Team Role: Leadership
 
Join Date: Aug 2009
Rookie Year: 2008
Location: Dayton, Ohio
Posts: 9
Josh Adkins has much to be proud ofJosh Adkins has much to be proud ofJosh Adkins has much to be proud ofJosh Adkins has much to be proud ofJosh Adkins has much to be proud ofJosh Adkins has much to be proud ofJosh Adkins has much to be proud ofJosh Adkins has much to be proud of
Re: Pneumatic Dump Valve for T-Shirt Launcher

Our team modified a sprinkler valve. Hardware stores normally have a good selection of these valves

http://www.instructables.com/id/Golf...rinkler-Valve/

Instead of using a blowoff valve to release the air holding down the diaphram we used a KoP solenoid valve. For about $25 you will have a high flow (about .6in^2) remotely operated valve.
  #3   Spotlight this post!  
Unread 18-08-2010, 11:01
Bryan Herbst's Avatar
Bryan Herbst Bryan Herbst is offline
Registered User
AKA: Bryan
FRC #2052 (KnightKrawler)
Team Role: Mentor
 
Join Date: Sep 2007
Rookie Year: 2007
Location: Minneapolis, Minnesota
Posts: 545
Bryan Herbst has a reputation beyond reputeBryan Herbst has a reputation beyond reputeBryan Herbst has a reputation beyond reputeBryan Herbst has a reputation beyond reputeBryan Herbst has a reputation beyond reputeBryan Herbst has a reputation beyond reputeBryan Herbst has a reputation beyond reputeBryan Herbst has a reputation beyond reputeBryan Herbst has a reputation beyond reputeBryan Herbst has a reputation beyond reputeBryan Herbst has a reputation beyond repute
Re: Pneumatic Dump Valve for T-Shirt Launcher

Our team also used a sprinkler valve, but we hooked it up to a relay instead of a solenoid.

Our local hardware store had plenty of 12v sprinkler valves for about $20. Just make sure that you get a 12v valve, as a large number of the valves operate on 24v.
__________________
Team 2052- KnightKrawler
Mentor and volunteer
  #4   Spotlight this post!  
Unread 18-08-2010, 11:21
Josh Adkins's Avatar
Josh Adkins Josh Adkins is offline
Registered User
FRC #3138 (Innovators Robotics)
Team Role: Leadership
 
Join Date: Aug 2009
Rookie Year: 2008
Location: Dayton, Ohio
Posts: 9
Josh Adkins has much to be proud ofJosh Adkins has much to be proud ofJosh Adkins has much to be proud ofJosh Adkins has much to be proud ofJosh Adkins has much to be proud ofJosh Adkins has much to be proud ofJosh Adkins has much to be proud ofJosh Adkins has much to be proud of
Re: Pneumatic Dump Valve for T-Shirt Launcher

Quote:
Our team also used a sprinkler valve, but we hooked it up to a relay instead of a solenoid.
If I understand correctly you used the solenoid already attached to the sprinkler valve rather than modifying it?

I think the only difference between the two methods is the time it takes to release the valve. I've read the modified sprinkler valve releases up to 10x faster, but I've never actually tested one without modifying it.

You could always test the sprinler valve out of the box, and, if your not getting the results you want, go ahead and modify it.
  #5   Spotlight this post!  
Unread 18-08-2010, 18:51
Bryan Herbst's Avatar
Bryan Herbst Bryan Herbst is offline
Registered User
AKA: Bryan
FRC #2052 (KnightKrawler)
Team Role: Mentor
 
Join Date: Sep 2007
Rookie Year: 2007
Location: Minneapolis, Minnesota
Posts: 545
Bryan Herbst has a reputation beyond reputeBryan Herbst has a reputation beyond reputeBryan Herbst has a reputation beyond reputeBryan Herbst has a reputation beyond reputeBryan Herbst has a reputation beyond reputeBryan Herbst has a reputation beyond reputeBryan Herbst has a reputation beyond reputeBryan Herbst has a reputation beyond reputeBryan Herbst has a reputation beyond reputeBryan Herbst has a reputation beyond reputeBryan Herbst has a reputation beyond repute
Re: Pneumatic Dump Valve for T-Shirt Launcher

Quote:
Originally Posted by Josh Adkins View Post
If I understand correctly you used the solenoid already attached to the sprinkler valve rather than modifying it?

I think the only difference between the two methods is the time it takes to release the valve. I've read the modified sprinkler valve releases up to 10x faster, but I've never actually tested one without modifying it.

You could always test the sprinler valve out of the box, and, if your not getting the results you want, go ahead and modify it.
Yes, sorry, wasn't thinking this morning.

We haven't had any problems with the speed at which it releases, but experience has told us that our system is relatively inefficient. We have considered improving it, but for our purposes what we have works fine. It takes a good while to get the 5gal tank back up to full after we launch a T-shirt, but we usually can only shoot off about 2-3 t-shirts at a time anyway. The full 5gal tank can shoot one to the back of the stands, one to the middle, and one up front consecutively with no problems.
__________________
Team 2052- KnightKrawler
Mentor and volunteer
  #6   Spotlight this post!  
Unread 18-08-2010, 22:57
Andrew Schuetze's Avatar
Andrew Schuetze Andrew Schuetze is offline
499 Founder / Alamo FTC & FLL AP
no team
Team Role: Leadership
 
Join Date: Jan 2002
Rookie Year: 2001
Location: San Antonio, Texas
Posts: 689
Andrew Schuetze has a reputation beyond reputeAndrew Schuetze has a reputation beyond reputeAndrew Schuetze has a reputation beyond reputeAndrew Schuetze has a reputation beyond reputeAndrew Schuetze has a reputation beyond reputeAndrew Schuetze has a reputation beyond reputeAndrew Schuetze has a reputation beyond reputeAndrew Schuetze has a reputation beyond reputeAndrew Schuetze has a reputation beyond reputeAndrew Schuetze has a reputation beyond reputeAndrew Schuetze has a reputation beyond repute
Re: Pneumatic Dump Valve for T-Shirt Launcher

We've had great success with this valve which is engineering for compressed air. A spike relay controlls this 12VDC valve perfectly. Dump is instantanously.
__________________
APS

Founder FRC 499
Parent alumni FRC 2745 & 4219
Co-Coach FTC 4549 & 6407
Alamo FTC Affiliate Partner
Alamo FLL Affiliate Partner
  #7   Spotlight this post!  
Unread 19-08-2010, 23:42
pfreivald's Avatar
pfreivald pfreivald is offline
Registered User
AKA: Patrick Freivald
FRC #1551 (The Grapes of Wrath)
Team Role: Mentor
 
Join Date: Jan 2007
Rookie Year: 2001
Location: Naples, NY
Posts: 2,304
pfreivald has a reputation beyond reputepfreivald has a reputation beyond reputepfreivald has a reputation beyond reputepfreivald has a reputation beyond reputepfreivald has a reputation beyond reputepfreivald has a reputation beyond reputepfreivald has a reputation beyond reputepfreivald has a reputation beyond reputepfreivald has a reputation beyond reputepfreivald has a reputation beyond reputepfreivald has a reputation beyond repute
Re: Pneumatic Dump Valve for T-Shirt Launcher

Thanks, all! A mentor brought in a valve -- no idea what it was originally used for, but it's steel and it's robust as heck and with it we shot a T-shirt 82 feet today. (That's more than enough distance given the venues in which we will be firing, and it will likely improve as we tweak things anyway.)
__________________
Patrick Freivald -- Mentor
Team 1551
"The Grapes of Wrath"
Bausch & Lomb, PTC Corporation, and Naples High School

I write books, too!
  #8   Spotlight this post!  
Unread 20-08-2010, 09:54
Taylor's Avatar
Taylor Taylor is offline
Professor of Thinkology, ThD
AKA: @taylorstem
FRC #3487 (Red Pride Robotics)
Team Role: Teacher
 
Join Date: Jan 2006
Rookie Year: 2006
Location: Indianapolis, IN, USA 46227
Posts: 4,605
Taylor has a reputation beyond reputeTaylor has a reputation beyond reputeTaylor has a reputation beyond reputeTaylor has a reputation beyond reputeTaylor has a reputation beyond reputeTaylor has a reputation beyond reputeTaylor has a reputation beyond reputeTaylor has a reputation beyond reputeTaylor has a reputation beyond reputeTaylor has a reputation beyond reputeTaylor has a reputation beyond repute
Re: Pneumatic Dump Valve for T-Shirt Launcher

Quote:
Originally Posted by pfreivald View Post
Thanks, all! A mentor brought in a valve -- no idea what it was originally used for, but it's steel and it's robust as heck and with it we shot a T-shirt 82 feet today. (That's more than enough distance given the venues in which we will be firing, and it will likely improve as we tweak things anyway.)
Be sure to post pictures and video!
__________________
Hi!
Closed Thread


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
pic: Team 1716 T-shirt Launcher McGurky Extra Discussion 12 11-01-2011 15:08
T-shirt launcher: Help? archer003 Technical Discussion 0 07-03-2010 16:49
T-shirt collection for NJ Regional - (T-Shirt Launcher) Team 2016 General Forum 0 17-02-2010 12:33
T-shirt launcher FRC 1985 catsylve Robot Showcase 4 21-09-2008 19:14
Dump valve and pressure gage's tareyton Pneumatics 3 06-02-2003 21:13


All times are GMT -5. The time now is 22:24.

The Chief Delphi Forums are sponsored by Innovation First International, Inc.


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