×
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

HELP

HELP

(OP)
PLEASE HELP.
MICROLOGIX 1500 LRP AND DYNA PART ENCODER CUT TO LENGTH APPLICATION, LENGTH VARIES UP TO 0.375" VARIES EVEN MORE AT LOWER SPEED.VERY CERTAIN THAT THERE IS NOT SLIPPAGE ON THE STOCK.
THANK YOU.

RE: HELP

Has the encoder been replaced recently?  If so was it replaced with the correct ppr? Or could be broken wire on the encoder and missing pulses.  I have seen the feeders slip on material many times.  The only way to tell is to hand tach the feeder roll then tach the material.  Additionally you must look at the plc program to determine what triggers the shear to fire and then troubleshoot from there.  Did a roll get replaced and now different diameter which is causing a calculation to be off?

RE: HELP

Does the length vary stochastically? Or is there a constant deviation from set length?

How is the pay-off brake working? Have had problems there. Brake not working correctly can cause elongation and also slippage (when you do not look).

What do the encoder signals look like? Baseline? Amplitude? Glitches? Missing pulses? Uneven width? (often a sign that there's dust or dirt in the encoder). Also, check the encoder coupling. Slippage there is a main cause for problems in these applications.

Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...

RE: HELP

(OP)
Thanks Skogsgurra,length is not consistence varies +/- 0.200.
These is new project no brake, forming round rod to triangle  shape, so there is a lot of pressure on the stock .
Encoder and plc is new,
        thank you for your help  
         

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