Go to Post Have no fear, ancient and brilliant coaches of yore were consulted. - JamesCH95 [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 18-01-2010, 17:00
Johnw Johnw is offline
Registered User
FRC #2172
 
Join Date: Jan 2010
Location: Lakewood, OH
Posts: 2
Johnw is an unknown quantity at this point
Pneumatic Rotary Actuators Questions

I guess what I am asking is, if anyone can show me a guide or some kind of information that would aid me in understanding them. I have heard about them before but I know little to nothing about them, such as force, speed and other aspects of them. I saw on the Bimba site that you could get these, and I was wondering if someone could help explain them to me, I had look for guides but had no success.

Thanks
  #2   Spotlight this post!  
Unread 18-01-2010, 17:40
Tom I's Avatar
Tom I Tom I is offline
Slightly Crazy... slightly
AKA: Tom Indelicato
FRC #0811 (The Cardinals)
Team Role: Alumni
 
Join Date: Jul 2008
Rookie Year: 2005
Location: Nashua, NH
Posts: 171
Tom I is a splendid one to beholdTom I is a splendid one to beholdTom I is a splendid one to beholdTom I is a splendid one to beholdTom I is a splendid one to beholdTom I is a splendid one to beholdTom I is a splendid one to behold
Re: Pneumatic Rotary Actuators Questions

My team has had some experience with these. Pretty much, its a way of taking the linear motion of a piston and turning into rotary motion. It works by a piston moving a rack, which turns a pinion, much like a car steering wheel works (kinda). This allows you to pneumatically turn something. The rotation is normally limited, so it does not behave like a motor. But if you only need to rotate something out of the way, like a door or something, it would turn it.

As for force and power, the one we used was a half inch bore cylinder, so ours had very little force. it was able to lift the small moment arm we needed it to, but it wouldn't be able to fight much resistance. Also, it behaves just like a cylinder, so if you're looking for speed (or kick!) you would need a larger bore than what we used, because ours simply lacked power of any sort. You can also play around with the air speed regulators to find the optimum power.

This is a different model than the one we used, but its the same general thing:
http://www.bimba.com/Products/PneuTu...taryActuators/
you could also look for others actuators. In my humble opinion, if you want to use it as a kicker, I don't think this will be what you're looking for. However, you're free to experiment, and if you find it works, let me know!

Also, one more thing from my team's experience... be careful with them, they can break
__________________
-Mentor-
-UMass Lowell '13-
-Former Team Lead-

  #3   Spotlight this post!  
Unread 18-01-2010, 17:46
Unsung FIRST Hero Woodie Flowers Award
Chris Fultz Chris Fultz is offline
My Other Car is a 500 HP Turbine
FRC #0234 (Cyber Blue)
Team Role: Engineer
 
Join Date: Jan 2002
Rookie Year: 1942
Location: Indianapolis, IN
Posts: 2,837
Chris Fultz has a reputation beyond reputeChris Fultz has a reputation beyond reputeChris Fultz has a reputation beyond reputeChris Fultz has a reputation beyond reputeChris Fultz has a reputation beyond reputeChris Fultz has a reputation beyond reputeChris Fultz has a reputation beyond reputeChris Fultz has a reputation beyond reputeChris Fultz has a reputation beyond reputeChris Fultz has a reputation beyond reputeChris Fultz has a reputation beyond repute
Re: Pneumatic Rotary Actuators Questions

The rotary actuators work by taking the linear motion of a pneumatic cylinder rod and converting it to a rotary motion.

Basically, you connect an air line to each end of the actuator. By pressurizing one end, you will turn the center shaft, usually about 90 degrees. By pressurizing the other end, you will rotate it back past center and 90 degrees the other direction. The Bmba site says they make them from 45 degrees to 1080 degrees (3 turns).

With 60 PSI to work with, you get limited torque output, but there are some specific places where these are beneficial.

If you these, be very careful with the end connectors for the tubing. The threaded connection to the cylinder is very small and a slight impact can break it off.
__________________
Chris Fultz
Cyber Blue - Team 234
2016 IRI Planning Committee
2016 IndyRAGE Planning Committee
2010 - Woodie Flowers Award - Championship
  #4   Spotlight this post!  
Unread 19-01-2010, 15:15
Johnw Johnw is offline
Registered User
FRC #2172
 
Join Date: Jan 2010
Location: Lakewood, OH
Posts: 2
Johnw is an unknown quantity at this point
Re: Pneumatic Rotary Actuators Questions

Do they have a good rotational speed?
  #5   Spotlight this post!  
Unread 19-01-2010, 15:43
Daniel_LaFleur's Avatar
Daniel_LaFleur Daniel_LaFleur is offline
Mad Scientist
AKA: Me
FRC #2040 (DERT)
Team Role: Engineer
 
Join Date: Apr 2005
Rookie Year: 2003
Location: Peoria, IL
Posts: 1,981
Daniel_LaFleur has a reputation beyond reputeDaniel_LaFleur has a reputation beyond reputeDaniel_LaFleur has a reputation beyond reputeDaniel_LaFleur has a reputation beyond reputeDaniel_LaFleur has a reputation beyond reputeDaniel_LaFleur has a reputation beyond reputeDaniel_LaFleur has a reputation beyond reputeDaniel_LaFleur has a reputation beyond reputeDaniel_LaFleur has a reputation beyond reputeDaniel_LaFleur has a reputation beyond reputeDaniel_LaFleur has a reputation beyond repute
Send a message via MSN to Daniel_LaFleur
Re: Pneumatic Rotary Actuators Questions

Quote:
Originally Posted by Johnw View Post
Do they have a good rotational speed?
Rotational speed is dependent on the supplied air pressure and the load it is required to move.
__________________
___________________
"We are not now that strength which in old days moved earth and heaven; that which we are, we are;
One equal temper of heroic hearts, Made weak by time and fate, but strong in will
To strive, to seek, to find, and not to yield. "
- Tennyson, Ulysses
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
Rotating pneumatic actuators horoponhorr Pneumatics 7 23-03-2007 05:50
actuators Transformers Pneumatics 1 27-01-2007 02:48
actuators KillerCows456 Technical Discussion 1 18-01-2006 17:04
cost of pneumatic actuators Gary Dillard Pneumatics 4 14-01-2004 23:53
Nitinol actuators patrickrd Technical Discussion 9 16-12-2003 14:04


All times are GMT -5. The time now is 22:30.

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