papaya

absolute motion servo motor and emergency stop

4 posts in this topic

Posted (edited)

Bonjour,

Hello,

I use a l33erm automaton and a Kinetix servo motor .
This
servo motor drives an engine with a chain moving in steps of 100 millimetres (there are 15 steps on the chain )
At each top of a cell this motor advances by 100 millimetre.
in reality it advances from about 0 to about 100. Sometimes it is 100,002 times to 99,997 (this is important further)
and when I give it a top it goes back to about 100 (100,003 times to 99,996)
And so on and so forth
up to no problem, I use a MAM with an absolute type of movement. It works.


Capturemam.JPG.21bb53af0276c8c7cb9a2f1b3 

 

However, this does not work any more after a rearmament following an emergency shutdown.
if it is a 100,002 no problem at the next top the chain advances one step
But when the engine is shut down at 99,997 and I give it the order to go to 100 it advances only by 0,003. 
This only happens after an emergency stop (or door opening).

Thank you for the help you can give me

excuse my English this is a machine translation

Captureparametreaxe.thumb.JPG.5f182a19a6Capturehelp.thumb.JPG.14498510c1f756673fUn séjour sans faille

Edited by papaya

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Does the servo-drive de-energize? losses power?

How do you home your axis?

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31 minutes ago, chantecler said:

Does the servo-drive de-energize? losses power?

How do you home your axis?

Thank you for your answer 

the servo-drive  has  de-energize by the STO, .. i think

This axis go home after fault with the same MAM .

Capture00.thumb.JPG.f8c8eef177f112d45c44Capture01.thumb.JPG.83624f87f96c92a793fcCapture.thumb.JPG.d9273f2aeb08857d239dd7Capture2.thumb.JPG.74d185617c30900e771bf

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Hi,

From here it's really difficult to figure out what's happening, I can only guess that when you have an emergency stop the drive de-energizes and losses its home reference and (maybe) that is why the next movement is to move the chain to its next stop in forward direction.

Another possibility that I can think of is that the emergency stop resets a sequence, in this case you have to check your program logic.
 

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