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Bystronic Bytube cutting problem

Bystronic Bytube cutting problem

Bystronic Bytube cutting problem

(OP)
Hello,

Bystronic Bytube 3kw laser with 35000hours on it.

We have strange problem, one part could be cut ideally and another one is not cut in all areas.

It looks like laser doesn't have enough power or the power level is jumping drastically.

You can see in our video that there is no sparks on normal cutting and then they appear. It all happens on the same contour. Sparks starts at 11 second.

We tried cutting mild steel 6mm and stainless steel 5mm. The result is the same. Some parts are very nice and some is impossible to remove.

On resonator I see power level , which maximum is around 2600W.

Testing gas blow shows correct behavior during cutting and in hand mode with cross jet.

Maybe you have a suggestion where to look for a problem?

I have cleaned, cheeked and replaced mirrors from resonator to cutting head.



Video: http://files.engineering.com/getfile.aspx?folder=c...

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