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output coupler

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fab3

fab3

Industrial
Dec 4, 2008
33
I am curious if there are any specific signs a output coupler is going bad or needs replacement. I am quite sure the one i have in use now is at least five years old and could probably be changed.
 
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As far as cutting, as the output coupler gets stressed, you'll usually have to move your focus higher and higher to be able to cut. Or it will cut for a 1-5 minutes, then go bad. On stainless cutting, it may cut OK for a while (1-5 minutes), then you'll lose the cut. Eventually you won't be able to cut at all.
To check it, you can take a cold and hot mode. If the hot mode is getting a lot deeper and diameter getting a lot smaller compared to cold mode, then the output coupler is stressed and needs to be replaced.
 
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The resonator is an old PRC 1500 watt. It does not hold full power but is stable at about 1300 watts.
 
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