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M140 - M Type Abnormal Beam?

adam212

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May 6, 2021
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I am using M140 M Type for a DIY laser engraver. Recently I noticed that when I focus the beam to a dot a rectangle pops up on the side. This rectangle feels like a reflection of the diode beam but turned 90 degrees. Is this normal for M140?

s-l1600.jpg
 



adam212

New member
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May 6, 2021
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2DA45F3E-E697-4F9F-8299-02F6047211DE.jpeg
 

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steve001

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As I recall Poco wrote in his thread they are looking into beam correction.
 

adam212

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Thanks for your replies. The thread above was an interesting read.
 




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