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Old 26th May 2012, 05:47 AM   #11
EUVL is offline EUVL  Europe
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When you have sufficient power to start melting / evaporating the metal (and we have) your problem is then to control laser power such that the groove left behind is not like a bombed ally on a micro scale.

Mechanical engraving is still our preferred method. It is much easier to control.
You just need a CNC mill and a high speed spindle, say 40,000 rpm.


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Old 26th May 2012, 05:51 AM   #12
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Hi Patric

I think the laser can remove the oxide layer on aluminum. I measured the resistance with meter just now. when the pen touch the black aera, the resistance is infinity. but it's 0 when touched the white aera.

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Old 26th May 2012, 05:59 AM   #13
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Incidentally, Patrick should be spelled with k.

You have probably then removed (part of) the say 10m of oxide layer.
For most purposes it is sufficient, and better than Silk Screen printing.

Black on white (silver) background would be a bit more challenging,
especially when you do want the silver to retain the protective oxide layer.

We would have loved lasering to work. It is much much faster.
But for many Hi-End applications, we just do not see laser replacing machining at this moment in time.
Who knows. There is still a lot of potential in laser machining.

Plate cutting is already almost all laser now.


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Old 26th May 2012, 05:59 AM   #14
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I agree that CNC is the best way to engrave metal. Laser can do well on steel but it have trouble on aluminum. The aluminum gas can reflect the laser to damage the lens.
We have several precision CNC but they are all busying at machining the enclosures :-(
Laser is much faster to make nice patterns on surface. Effeciency is very important for Chinese low profit business.
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Old 26th May 2012, 06:02 AM   #15
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We both know all the "problems" and the limitations of alternative solutions.




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Old 26th May 2012, 06:06 AM   #16
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Ya that's why both methods exist.
nice to discuss with you

Mike
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Old 26th May 2012, 06:10 AM   #17
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May I ask where you are located ?
You can PM me if you wish.


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Old 26th May 2012, 06:40 AM   #18
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Beijing of China, not far away from Bird Nest :-)
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Old 26th May 2012, 06:45 AM   #19
EUVL is offline EUVL  Europe
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Quite far from us.
Maybe I'll drop you a line when one of us is in Beijing next time.


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