×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

cylcle testing..plc?

cylcle testing..plc?

cylcle testing..plc?

(OP)
Hi all,

I do not have a good electrical background,hence the reason for my question..

I need to cycle test a unit to see if it will last over a certain amount of cycles (approx. 10,000 cycles)..

Its basically a hydraulic cylinder that I need to run up to full pressure(10,000 psi) and then retract, and then run up to full pressure again, and so on, and so on...

I think I need a PLC, so I am told..I need it to cylce every 20 seconds and I need it to have a counter on it so I can see how many cylces..

I have a high pressure pump with a button switch to activate.  I obviously can't sit there and activate this cylinder 10,000 times. So I want to automate it so I can walk away and do something else.  

So basically, I am clueless here..any suggestions??

thanks,
brent

RE: cylcle testing..plc?

I do not think that you need a PLC. There are universal timers that can be set to deliver a contact closure every 20th second. Hook that parallel to the push-button you were supposed to push, but don't like to.

Set the contact closure time (the ON time) so that there is enough time for the pressure to build up and the piston to do a full stroke.

Add a simple event counter to totalize the number of strokes.

See http://www.inotek.com/Catalog/abbe16cn.html for an example of the type of relay you need. Google "universal time relay" for more stuff.

Of course, a simple PLC (Siemens Logo! for instance) would also do the job admirably. But you don't seem to want to do the programming. Or, if I am mistaken there, just do it. They cost just above USD 100.

Gunnar Englund
www.gke.org

RE: cylcle testing..plc?

You may be able to get away with a predetermining cycle counter with timer. I think Eagle Signal Controls (now Danaher)is a manufacturer of one such unit. Basically a device that you set how many cycles and the on/off time for each cycle.

Look at the SX110 for example

http://www.dancon.com/products/PresetTime/presettime3.htm

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
"It's the questions that drive us"
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources