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Thread: How strong fiber laser for marking stainless steel 400x400 ?

  1. #1
    Join Date
    Dec 2011
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    Czech republic
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    How strong fiber laser for marking stainless steel 400x400 ?

    Hi all,
    please can you help me answer to question how strong should be fiber laser for marking stainless steel 400x400mm or 300x300mm ? Mopa or Qswitched ? Any practical experience with longer lens?

    Thank you for hints.

    Martin
    GCC Spirit LS 60W
    WEIKE LC 1612 90/130W RECI
    Morntech Fiber 30w raycus
    CO2 Galvo 35w
    Corel X6

  2. #2
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    Mar 2014
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    Iowa USA
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    Your 30 watt fiber machine won't do it?
    Retired Guy- Central Iowa. , Cloudray Galvo Fiber , WorkBee 1000x750 CNC Router - Mach4 - Windows 10

  3. #3
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    I didn't tried so long lens because I expect that 30w is too low power.... Do you have experience with 30w and long lens?
    Thx
    GCC Spirit LS 60W
    WEIKE LC 1612 90/130W RECI
    Morntech Fiber 30w raycus
    CO2 Galvo 35w
    Corel X6

  4. #4
    Join Date
    Mar 2014
    Location
    Iowa USA
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    Quote Originally Posted by Martin Safranek View Post
    I didn't tried so long lens because I expect that 30w is too low power.... Do you have experience with 30w and long lens?
    Thx
    My long lens gives a 7.9 x 7.9 inch field and I can mark stainless, Lens cost is like $100 from Cloudray, 50 watt laser galvo fiber is $5k.
    Retired Guy- Central Iowa. , Cloudray Galvo Fiber , WorkBee 1000x750 CNC Router - Mach4 - Windows 10

  5. #5
    There are several ways to "mark" stainless with a fiber.

    One way is to 'scuff' the surface with the laser using around a .05mm cross hatch, engraved using a low frequency, reasonably fast and 40% or less power, which results in a 'bright' sandblasted-looking mark. Vary speed and power settings to experiment.

    Another is the 'brute force' method, using a very tight single (not cross) hatch like .01mm, high power and lower speed. Higher frequencies sometimes work better...

    Yet another is the 'annealing' method, very slow but works well. My favorite settings for annealing is a single hatch, very tight at .002mm, running at 200-300 speed, about 30% power and frequency set at 70 or higher. This method causes the carbon at the surface of the metal to darken, with little or no actual engraving. Slight adjustments, in raising power and/or lowering frequency can add (or subtract) darkness, and the amount of actual engraving performed. Very slow but effective, but beware, as it is truly amazing how much heat a slow-moving 30 watt laser beam running at only 30% power can generate, which can cause the metal to warp, sometimes quite a bit...
    ========================================
    ELEVEN - rotary cutter tool machines
    FOUR - CO2 lasers
    THREE- make that FOUR now - fiber lasers
    ONE - vinyl cutter
    CASmate, Corel, Gravostyle


  6. #6
    Join Date
    Mar 2014
    Location
    Iowa USA
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    Quote Originally Posted by Bill George View Post
    My long lens gives a 7.9 x 7.9 inch field and I can mark stainless, Lens cost is like $100 from Cloudray, 50 watt laser galvo fiber is $5k.
    Forgot to say mine is a 30 watt machine. I think what your looking for is will a 30 watt using a 200 or 300 mm work area mark stainless and my answer is it works for me and least at the 200x200 mm work area.
    Retired Guy- Central Iowa. , Cloudray Galvo Fiber , WorkBee 1000x750 CNC Router - Mach4 - Windows 10

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