27-08-2009 16:14

rokenboker

Re: pic: Team 1716 T-shirt Launcher

hey, nice work. is your tilt for the barrel only a single acting solenoid? and what brand valve are you using for it (SMC, FESTO)? just might have some helpful advice about pneumatics for you...

27-08-2009 17:43

McGurky

Re: pic: Team 1716 T-shirt Launcher

It is a double smc solenoid. Thanks for the compliments!

27-08-2009 21:36

rokenboker

Re: pic: Team 1716 T-shirt Launcher

if you can get ahold of two FESTO single-acting solenoids, i can give you a schematic on how to make the barrel adjust to different positions. did you think of using a Rain Bird (or something like that) electric sprinkler valve with a transformer? (i can tell you how to build it [safely]) they do work on 120 PSI that's what i'm using and it never leaks or anything. if you have any questions, just ask and i will most likely be able to help.

28-08-2009 08:38

McGurky

Re: pic: Team 1716 T-shirt Launcher

we looked into a sprinkler valve, but decided that it wouldn't be safe to have it holding back all of the pressure. Maybe I am wrong but we just went the safe route!

we will for sure try out that festo valve today!! thanks for the heads up!!

28-08-2009 10:52

Stephen of REX

Re: pic: Team 1716 T-shirt Launcher

I've been wanting to do one of these forever!

For valves, I would look at 1726's valve setup at http://www.chiefdelphi.com/media/photos/29086 and http://www.chiefdelphi.com/media/photos/29085

How far does it shoot with that galvanized pipe (?) resevior?

28-08-2009 12:16

McGurky

Re: pic: Team 1716 T-shirt Launcher

we have been charging it to about 100-115 psi, and with 2 compressors it takes about 15-20 seconds to fill. The t-shirt will go about 100-120 feet at the lower position. But when the barrel is raised, the T-shirt will go about 60-80 feet, but super high in the air, I have a ton of video that we shot yesterday, I just need time to edit it, and will post it up on youtube. Overall, It shoots awesome and at the distance we are shooting and where we will be at our school football games, the t-shirt will go right over the stands... So as far a s distance, it is all we will really need!!

Again, There are more pictures posted on that facebook link that I posted in the original post!

28-08-2009 13:43

Chris is me

Re: pic: Team 1716 T-shirt Launcher

Now the real challenge is to write a program that will let you target a t-shirt a specific distance away from the robot

Nice 'bot. Hope to catch a T-shirt out of it someday.

28-08-2009 20:55

McGurky

Re: pic: Team 1716 T-shirt Launcher

We are thinking about mounting another compressor but we manages to misplace the rubber standoffs to mount them. Is there anywhere they are available online? I couldn't seem to find them on the where to get more list.

Thanks,
McGurky

29-08-2009 16:46

jspatz1

Re: pic: Team 1716 T-shirt Launcher

Our 2009 Lunacy robot is ready to go as a t-shirt launcher with no modifications. Just need to bundle the shirts to fit in the catapult.

http://www.chiefdelphi.com/forums/at...9&d=1239427199

Shoots about 35 ft., good enough for basketball games.

If you are having trouble with air flow capacity through your valve, try parelleling 2 or 3 valves together, so they share a source, and merge their output together. We actually did this on this robot to get the cylinder speed we needed.

29-08-2009 19:09

artdutra04

Re: pic: Team 1716 T-shirt Launcher

They are #8-32 rubber shock mounts/vibration dampers; Vex Robotics sells identical ones (P/N LINK-RUBBER-832-4PK) on this page.

SDP/SI also sells #8-32 rubber shock mounts, and McMaster has a variety of them on page 1362.

29-08-2009 19:28

McGurky

Re: pic: Team 1716 T-shirt Launcher

Awesome! thanks, I was looking for a technical name for them, but couldn't find one!!

Thanks again!!!

-McGurky

11-01-2011 15:08

atarie101

Re: pic: Team 1716 T-shirt Launcher

How much did this whole project cost?