Site Logo

 
It is currently Sat Apr 19, 2014 1:46 pm

All times are UTC - 6 hours




Post new topic Reply to topic  [ 21 posts ]  Go to page Previous  1, 2, 3  Next
Author Message
 Post subject: Re: Blue plastic drums
PostPosted: Mon Nov 07, 2011 7:15 am 
Offline
User avatar

Joined: Mon Mar 07, 2011 11:30 am
Posts: 67
Location: Fridley, MN
kstoerz wrote:
...
A hypothetical -90psi vacuum supply would indeed double the force of the cylinder. The 90psi in the top of the cylinder is relative to 0psi (atmospheric pressure) in the bottom half. 90 on top an -90 on the bottom is the same as having 180psi on top and the usual nothing on the bottom. As to how and why someone would actually create a large scale -90psi vacuum supply to pipe around the shop, I'll leave an exercise for the reader...


There must be balance in the Force! If we have plumbed shop air, we must have plumbed shop vacuum! ;)

_________________
73 de KC0TFB * http://gplus.luno.org * http://wishlist.luno.org/
Skype/Yahoo Messenger/Google Chat: kc0tfb * Google Voice: (612) 208-2550


Top
 Profile  
 
 Post subject: Re: Blue plastic drums
PostPosted: Mon Nov 07, 2011 9:44 am 
Offline
User avatar

Joined: Tue Mar 17, 2009 5:06 pm
Posts: 319
Location: Minneapolis, MN
Thinking about some kind of game. a pneumatic game. like Crush, Crush, Can Revolution. Imagine if you will. 2 stomp pads connected to 2 separate 7 inch throw cylinders. The game is to use the stomp pad to build up pressure into the the crushing arm (like a bicycle pump). Hacker are competitive by nature. so why not bleed off a little of that energy to crush cans. We could even add point counters by pressure and number of stomps. I see a leader board feature added soon after...

_________________
Have kilt, will travel...


Top
 Profile  
 
 Post subject: Re: Blue plastic drums
PostPosted: Mon Nov 07, 2011 11:37 am 
Offline
Site Admin

Joined: Mon Mar 30, 2009 11:03 am
Posts: 363
Location: Maple grove
+1
swinkdaddy wrote:
Thinking about some kind of game. a pneumatic game. like Crush, Crush, Can Revolution. Imagine if you will. 2 stomp pads connected to 2 separate 7 inch throw cylinders. The game is to use the stomp pad to build up pressure into the the crushing arm (like a bicycle pump). Hacker are competitive by nature. so why not bleed off a little of that energy to crush cans. We could even add point counters by pressure and number of stomps. I see a leader board feature added soon after...


Top
 Profile  
 
 Post subject: Re: Blue plastic drums
PostPosted: Mon Nov 07, 2011 12:07 pm 
Offline
User avatar

Joined: Fri Jan 30, 2009 1:54 am
Posts: 194
Location: Coon Rapids
I'm curious how you plan to generate -90 psi vaccuum. ;)


Top
 Profile  
 
 Post subject: Re: Blue plastic drums
PostPosted: Mon Nov 07, 2011 2:20 pm 
Offline
User avatar

Joined: Thu Dec 02, 2010 12:25 pm
Posts: 75
Location: Minneapolis
darus67 wrote:
I'm curious how you plan to generate -90 psi vaccuum. ;)


Sssh, don't tell them!


Top
 Profile  
 
 Post subject: Re: Blue plastic drums
PostPosted: Mon Nov 07, 2011 7:11 pm 
Offline
User avatar

Joined: Fri Feb 05, 2010 10:35 pm
Posts: 71
I guess I'm not sure why you would need that much force. I'm sure you can crush a can with less then 200lbs. You have to rememeber that if you hit the can at a slight angle its side walls will buckle. Also I don't think it would be wise to do a -90 psi with a 90psi for the fact that most cylinders are rated at 150 psi. Soo I'm thinking that you might actually rupture the cylinder itself. That being said. If you wanted to create an easy -90 psi system that all you need to do is run two cylinders in tandom. One has 90 psi pushing in extending the rod. The other which is connected to the same rod just back words will have ~ the same amount of negitive pressure on one of its port. (the difference would be the cap end area vs rod end area)

Oh and I got bored and built a prototype out of wood. It's sitting in the shop office. I know where the directional control valve is. I don't have the quick connect tube or standard fittings for it.

_________________
"insert something witty here"


Top
 Profile  
 
 Post subject: Re: Blue plastic drums
PostPosted: Tue Nov 08, 2011 9:29 am 
Offline
User avatar

Joined: Thu Dec 02, 2010 12:25 pm
Posts: 75
Location: Minneapolis
How about ultracapacitors and a really big solenoid?

-Jim Hart


Top
 Profile  
 
 Post subject: Re: Blue plastic drums
PostPosted: Tue Nov 08, 2011 11:53 pm 
Offline

Joined: Sat Jul 17, 2010 5:13 pm
Posts: 246
Location: Minneapolis, MN
How about this: http://tesladownunder.com/CanCrushing.htm

Not exactly efficient, or even particularly effective, but damn! Just... damn.

_________________
If it ain't broke, your version is outdated.


Top
 Profile  
 
 Post subject: Re: Blue plastic drums
PostPosted: Wed Nov 09, 2011 3:38 am 
Offline

Joined: Thu Feb 17, 2011 9:46 pm
Posts: 42
Happyk wrote:
I guess I'm not sure why you would need that much force.


Who said anything about need? :twisted:

Image

overkill by kstoerz, on Flickr

_________________
Karl
kstoerz.com


Top
 Profile  
 
 Post subject: Re: Blue plastic drums
PostPosted: Wed Nov 09, 2011 9:22 am 
Offline
User avatar

Joined: Thu Dec 02, 2010 12:25 pm
Posts: 75
Location: Minneapolis
mcsteve wrote:
How about this: http://tesladownunder.com/CanCrushing.htm

Not exactly efficient, or even particularly effective, but damn! Just... damn.


That link is awesome.

-Jim Hart


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 21 posts ]  Go to page Previous  1, 2, 3  Next

All times are UTC - 6 hours


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
Template made by DEVPPL Flash Games