[Scenmed]

The 100 watt (red/black style) Chinese OmTech laser was working fine until ghost lines started to appear while cutting and sometimes during engraving. I checked mirror alignment and all 3 are centered properly. They are all clean as is the laser tube output. Today I installed a new focus lens (1.5") and although the lines are a bit sharper I'm still getting ghost lines. Please see picture.
Can anyone advise me as to what may be causing these phantom lines? Thank you!

[Dean448]

What type mirrors are you using? I had ghost lines like that on my new 90W tube just before I burnt a hole in and cracked the first mirror. I had gold over glass and converted to gold over SI. Problem solved for me.


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[Scenmed]

What type mirrors are you using? I had ghost lines like that on my new 90W tube just before I burnt a hole in and cracked the first mirror. I had gold over glass and converted to gold over SI. Problem solved for me.


Sent from my iPhone using Tapatalk

I don't know what mirror type but I ordered 3 new ones from Amazon that I hope get here tomorrow. They "appear" clean and clear of scratches. I'm just surprised the new focal lens didn't help. Thanks for your reply!