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Thread: Engraving parameters for 30W MOPA on acrylic (plexiglas)

  1. #1
    Join Date
    May 2009
    Location
    Wellington, Western Cape
    Posts
    7

    Engraving parameters for 30W MOPA on acrylic (plexiglas)

    I've been trying to engrave plexiglass using the setting recommend by the machine supplier and also others downloaded from various sites. However I've not been able to replicate the same result that they have shown in testing prior to me purchasing the machine. I only achieve a grey versus white marking on black and no marking/burning on coloured Plexiglas. I've created a few different map/matrix with various power/frequency/q pulse width to test with but either no result or burned plastic as result.

    Is there anyone who could suggest a more productive method to test various settings on a substrate or even willing to share settings that they have been using that works on the Plexiglas? Also any suggestions on how to 'replicate' non-mopa settings on a MOPA machine? For example using a fixed Q pulse width to simulate a non-mopa machine? And what would that be?

    Thank you
    80W CO2 laser

  2. #2
    I can't offer much help because we aren't running a MOPA system but I can tell you that the acrylic itself matters. Especially the black. Some brands mark super bright white and some brands mark gray. There's nothing that I'm aware of that you can do to make it white on the material that engraves gray. Been there, done that. As for clear acrylic, I've never seen that done and never been able to do it.
    Lasers : Trotec Speedy 300 75W, Trotec Speedy 300 80W, Galvo Fiber Laser 20W
    Printers : Mimaki UJF-6042 UV Flatbed Printer , HP Designjet L26500 61" Wide Format Latex Printer, Summa S140-T 48" Vinyl Plotter
    Router : ShopBot 48" x 96" CNC Router Rotary Engravers : (2) Xenetech XOT 16 x 25 Rotary Engravers

    Real name Steve but that name was taken on the forum. Used Middle name. Call me Steve or Scott, doesn't matter.

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