Yes, but for a slower cut,  and that means more time/ = money.

Sight unseen I would say: 
CO2 laser delivers energy pulse to pulverize substrates direct to plasma
state and up the chimney, does not work by [chemical] burning. So you should
not be receiving carbon black other than slight darkening caramelizing to
near black, possibly a little black right on cut margin.

The window on CO2 is small on balancing pulse rate, feed speed, cooling flow
etc so that adjacent areas can be come overheated by conduction and be
burnt. There is operator skill in final balance for specific circuit types.,
but its usually doable. If you have actual carbon it might be possible to
ash it off in plasma to recover existing and future work.

Regards


Mike 


 


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Paul Edwards
Sent: Tuesday, June 19, 2012 10:30 PM
To: [log in to unmask]
Subject: Re: [TN] Type 3 flex burnt during laser cutting

Change to a different laser...

Paul

Paul Edwards

Process/Quality Engineering

Surface Art Engineering

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of [log in to unmask]
Sent: Tuesday, June 19, 2012 1:33 PM
To: [log in to unmask]
Subject: [TN] Type 3 flex burnt during laser cutting

Need guideline for acceptance.

We have a Type 3 flex that requires laser cutting. (CO2 laser)
Sometimes (very rare)..we see laser burn on the flex.

What is the acceptance criteria.  Looked in IPC-600 and 6013.  Does not
address the laser cutting/burn situation.

OR if you have seen this and how was it handled.

Rashesh
Accurate Engg Inc.

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