Go to Post I love robotics, it has a spot for every kinda future career a student chooses. - Bharat Nain [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

 
 
 
Thread Tools Rate Thread Display Modes
Prev Previous Post   Next Post Next
  #13   Spotlight this post!  
Unread 28-03-2006, 21:56
Arkorobotics's Avatar
Arkorobotics Arkorobotics is offline
Robots!
AKA: Ara Kourchians
FRC #0589 (FalkØn)
Team Role: Mentor
 
Join Date: Nov 2005
Rookie Year: 2004
Location: La Crescenta, CA
Posts: 417
Arkorobotics is a splendid one to beholdArkorobotics is a splendid one to beholdArkorobotics is a splendid one to beholdArkorobotics is a splendid one to beholdArkorobotics is a splendid one to beholdArkorobotics is a splendid one to beholdArkorobotics is a splendid one to behold
Send a message via AIM to Arkorobotics
Re: pneumatics or hydraulics ?

Quote:
Originally Posted by KenWittlief
Im not sure I understand why people are saying pneumatics are rough, and hydraulics would be smoother?

Pneumatics use air, which will compress. Pneumatic cylinders act like adjustable air shocks, or air springs.

Hydraulics use oil, which is un-compressible. When you extend a hydraulic piston to a certain position it will be rock solid and will have zero give.

With hydraulic valves you can let small rates of fluid through - they are proportional valves, but you can also let large amounts of fluid at high pressure through, and send very violent jerks into the chair someone is sitting in.
I have seen that before on hydraulic hoists in big OLD auto-shops. Our school use to have an auto-shop before it became the robotics shop, and this had 2 gigantic hydraulic hoists. I remember lifting it without a load on and it would lag and jerk around, but with a load it still did it, just not as much. I think the jerking is due to a lack of oil lubricant. Now I am not sure, but I do agree now, that pneumatics are smoother. I forgot about that hydraulic experience. I know at times pneumatics time to time might have a minor lag, but that is only at low pressures (from my experience). I think mainly because people touch the shaft and leave it out extended and it collects dust.
Thanks for the reminder, I just still say hydraulics because you can regulate the stroke . I am not sure if it is the same on pneumatics, because I have never seen a device that can do that.
__________________
2007 Rockwell Automation Innovation in Control Award winners (Southern California Regional)
Crescenta Valley High School Team 589
http://www.arkorobotics.com My Blag


3.141592653589793238462643383275902884197 <- Current memorization of Pi
Callsign: N6ARA
 


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
pneumatics for 2006 competition? Joobacca Pneumatics 10 21-01-2006 23:14
Using previous years pneumatics? ChuckDickerson Pneumatics 0 30-01-2005 18:22
General Pneumatics Drok00 Pneumatics 8 11-01-2005 23:35
pneumatics and joysticks Jared Stofflett Pneumatics 3 24-02-2004 23:56
pneumatics and joysticks Jared Stofflett Programming 1 24-02-2004 17:45


All times are GMT -5. The time now is 01:07.

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