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  1. #1
    Join Date
    Oct 2020

    Mirrors adjustet - but beam isnt a complete circle?

    I have Adjustet the mirrors on my 80w red and black chinese laser, the dot is roughly in the center of the third mirror. But when trying to asjust the lens vertically, I can see that the mark left when moving the table 100mm down is far from a circle. It almost looks as if something is shadowing for the beam. I have alteady removed the air assist nozzle...
    Any input or help apreciated

  2. #2
    Join Date
    Nov 2008

    Re: Mirrors adjustet - but beam isnt a complete circle?

    Something like this could be an indication that the tube is bad. But look closely at the beam pattern before the first mirror to see if it’s something to do with the mirrors and not the tube.
    Partial and full circles are difficult to focus into a finely concentrated beam.

    Sent from my iPhone using Tapatalk

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