Go to Post Take care of home and family first- then we play robots - Wayne C. [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 23-01-2006, 18:01
waialua359's Avatar
waialua359 waialua359 is offline
Mentor
AKA: Glenn
FRC #0359 (Hawaiian Kids)
Team Role: Mentor
 
Join Date: Apr 2003
Rookie Year: 2000
Location: Waialua, HI
Posts: 3,301
waialua359 has a reputation beyond reputewaialua359 has a reputation beyond reputewaialua359 has a reputation beyond reputewaialua359 has a reputation beyond reputewaialua359 has a reputation beyond reputewaialua359 has a reputation beyond reputewaialua359 has a reputation beyond reputewaialua359 has a reputation beyond reputewaialua359 has a reputation beyond reputewaialua359 has a reputation beyond reputewaialua359 has a reputation beyond repute
Our pump has problems!

Hi all,
We hooked up our pneumatic system to a cylinder following the basic setup.
Our pump gauge only read until 75psi. The pump also was still on and didnt shut off. I think the switch kicks in at about 115 psi to shut the pump off. anybody else had problems getting the air tanks to reach 115psi? We checked all of our hoses and their was no apparent leak.

Also, can you adjust the switch to shut off the tank at 75psi? If so, how? is it done through the code?

Aloha!!!
  #2   Spotlight this post!  
Unread 23-01-2006, 18:22
sanddrag sanddrag is offline
On to my 16th year in FRC
FRC #0696 (Circuit Breakers)
Team Role: Teacher
 
Join Date: Jul 2002
Rookie Year: 2002
Location: Glendale, CA
Posts: 8,510
sanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond repute
Re: Our pump has problems!

Did you notice the compressor getting very warm? Did it take a long time to get up to pressure? My guess is you have it running in reverse. Try switching the wires or the relay direction.
__________________
Teacher/Engineer/Machinist - Team 696 Circuit Breakers, 2011 - Present
Mentor/Engineer/Machinist, Team 968 RAWC, 2007-2010
Technical Mentor, Team 696 Circuit Breakers, 2005-2007
Student Mechanical Leader and Driver, Team 696 Circuit Breakers, 2002-2004
  #3   Spotlight this post!  
Unread 23-01-2006, 19:27
KenWittlief KenWittlief is offline
.
no team
Team Role: Engineer
 
Join Date: Mar 2003
Location: Rochester, NY
Posts: 4,213
KenWittlief has a reputation beyond reputeKenWittlief has a reputation beyond reputeKenWittlief has a reputation beyond reputeKenWittlief has a reputation beyond reputeKenWittlief has a reputation beyond reputeKenWittlief has a reputation beyond reputeKenWittlief has a reputation beyond reputeKenWittlief has a reputation beyond reputeKenWittlief has a reputation beyond reputeKenWittlief has a reputation beyond reputeKenWittlief has a reputation beyond repute
Re: Our pump has problems!

reverse? I though the pump was bi-directional?

check your fittings all around with a little soapy water. Or pump up the system with a pressure gauge attached, turn the pump off, and watch the pressure - you should not be able to see the needle on the gauge move in less than a minute or two.
  #4   Spotlight this post!  
Unread 23-01-2006, 19:50
Derek Bessette's Avatar Unsung FIRST Hero
Derek Bessette Derek Bessette is offline
Registered User
FRC #4976 (Rebels)
Team Role: Engineer
 
Join Date: Oct 2004
Rookie Year: 2003
Location: Milton, Ontario, Canada
Posts: 90
Derek Bessette has a reputation beyond reputeDerek Bessette has a reputation beyond reputeDerek Bessette has a reputation beyond reputeDerek Bessette has a reputation beyond reputeDerek Bessette has a reputation beyond reputeDerek Bessette has a reputation beyond reputeDerek Bessette has a reputation beyond reputeDerek Bessette has a reputation beyond reputeDerek Bessette has a reputation beyond reputeDerek Bessette has a reputation beyond reputeDerek Bessette has a reputation beyond repute
Re: Our pump has problems!

I would try disconnecting the entire circuit after your pressure gage and pressure switch. Once you have done this plug the open end. If you are using tubing, a t-fitting with two ends connected with a single loop of tube works well as a plug.

Try your compressor using this setup. This will help determine whether your problem is a leak or actually with the compressor.

For instance, if the pressure goes up to 120 in this situation, you would know that you had a leak somewhere. If the pressure still stops at 75 psi then you need to start looking at your compressor.

Hope this helps.
__________________
Derek Bessette
Team 4976 - GDHS Rebels
(Formerly Team 1114 and 3571)
  #5   Spotlight this post!  
Unread 23-01-2006, 20:15
Stephen Kowski's Avatar
Stephen Kowski Stephen Kowski is offline
BSEE, MSEE, JD
AKA: employed
no team
Team Role: Alumni
 
Join Date: Jun 2001
Rookie Year: 2000
Location: Saint Petersburg, FL
Posts: 1,144
Stephen Kowski has a reputation beyond reputeStephen Kowski has a reputation beyond reputeStephen Kowski has a reputation beyond reputeStephen Kowski has a reputation beyond reputeStephen Kowski has a reputation beyond reputeStephen Kowski has a reputation beyond reputeStephen Kowski has a reputation beyond reputeStephen Kowski has a reputation beyond reputeStephen Kowski has a reputation beyond reputeStephen Kowski has a reputation beyond reputeStephen Kowski has a reputation beyond repute
Send a message via AIM to Stephen Kowski
Re: Our pump has problems!

make sure are your components are running in the correct direction especially the regulators....(hint: turn them upside down there is normally an arrow indicating the path air will flow)
  #6   Spotlight this post!  
Unread 24-01-2006, 07:54
Unsung FIRST Hero
Al Skierkiewicz Al Skierkiewicz is offline
Broadcast Eng/Chief Robot Inspector
AKA: Big Al WFFA 2005
FRC #0111 (WildStang)
Team Role: Engineer
 
Join Date: Jun 2001
Rookie Year: 1996
Location: Wheeling, IL
Posts: 10,770
Al Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond repute
Re: Our pump has problems!

Quote:
Originally Posted by waialua359
Hi all,
We hooked up our pneumatic system to a cylinder following the basic setup.
Our pump gauge only read until 75psi. The pump also was still on and didnt shut off. I think the switch kicks in at about 115 psi to shut the pump off. anybody else had problems getting the air tanks to reach 115psi? We checked all of our hoses and their was no apparent leak.

Also, can you adjust the switch to shut off the tank at 75psi? If so, how? is it done through the code?

Aloha!!!
There are a few things that could be wrong. Although the pump works in either polarity, it is more efficient and will run cooler when running in the correct direction. It is possible that the wiring feeding the compressor has a loose crimp or that you have a defective breaker which will supply less current to the compressor. The compressor has a pressure relief valve that is designed to pop open at 125-130 PSI that may be damaged and leaking. It is the brass fitting connected to the head of the compressor. Finally, screw fittings should be assembled with Teflon tape (available at any hardware store) to help seal the connection. 90% of the problems with pneumatics are leaks. If you system is already assembled with valves in place, clamp the tubing as it exits the storage tanks and see if the compressor will reach full 120 PSI. Valves sometimes leak especially when installed backwards.
Aloha!
__________________
Good Luck All. Learn something new, everyday!
Al
WB9UVJ
www.wildstang.org
________________________
Storming the Tower since 1996.
  #7   Spotlight this post!  
Unread 24-01-2006, 13:00
Jared Russell's Avatar
Jared Russell Jared Russell is offline
Taking a year (mostly) off
FRC #0254 (The Cheesy Poofs), FRC #0341 (Miss Daisy)
Team Role: Engineer
 
Join Date: Nov 2002
Rookie Year: 2001
Location: San Francisco, CA
Posts: 3,078
Jared Russell has a reputation beyond reputeJared Russell has a reputation beyond reputeJared Russell has a reputation beyond reputeJared Russell has a reputation beyond reputeJared Russell has a reputation beyond reputeJared Russell has a reputation beyond reputeJared Russell has a reputation beyond reputeJared Russell has a reputation beyond reputeJared Russell has a reputation beyond reputeJared Russell has a reputation beyond reputeJared Russell has a reputation beyond repute
Re: Our pump has problems!

We had this problem earlier too - it turned out the pressure relief valve in the compressor was damaged. We replaced it and our problem went away.
  #8   Spotlight this post!  
Unread 24-01-2006, 13:02
waialua359's Avatar
waialua359 waialua359 is offline
Mentor
AKA: Glenn
FRC #0359 (Hawaiian Kids)
Team Role: Mentor
 
Join Date: Apr 2003
Rookie Year: 2000
Location: Waialua, HI
Posts: 3,301
waialua359 has a reputation beyond reputewaialua359 has a reputation beyond reputewaialua359 has a reputation beyond reputewaialua359 has a reputation beyond reputewaialua359 has a reputation beyond reputewaialua359 has a reputation beyond reputewaialua359 has a reputation beyond reputewaialua359 has a reputation beyond reputewaialua359 has a reputation beyond reputewaialua359 has a reputation beyond reputewaialua359 has a reputation beyond repute
Re: Our pump has problems! *FIXED*

Thanks everyone for your help. It was our regulator.
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
Labview problems and code problems ajsetter Programming 25 18-01-2006 17:07
Robot Rodeo - fixing control problems Gary Dillard Off-Season Events 7 26-10-2004 00:46
Do you all have problems with.... Munkaboo Website Design/Showcase 19 03-03-2003 19:51
Radio problems -- not archiver 2000 1 23-06-2002 22:23
Pneumatics pump allowed on robot? bigqueue Pneumatics 5 06-01-2002 12:30


All times are GMT -5. The time now is 17:16.

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