Looking for information on lasers

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This topic contains 5 replies, has 4 voices, and was last updated by  Bryan 1 year ago.

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  • #71881

    John
    Participant

    I am thinking about getting a laser and am very new to lasers. I am hopping to get something that can burn images and also cut through plywood upto maybe 1/4 inch. What should I be looking for? is the 2.8w that is referenced strong enough for that?

    #71904

    Bryan
    Participant

    I just installed a 4w. Have not been able to cut through 1/4″. Probable can get through 1/8″. Maybe a 10w or larger.

    #71925

    Kevin
    Participant

    for cutting plywood you are  better off with a co2 laser.  I have a 3.5w led Chinese laser and it engraves wood well, but it’s not going to cut it without a bunch of slow passes and probably air assist.  Just my 2 cents.

    #71937

    dkj4linux
    Participant

    I have successfully cut some common 4.7mm luan plywood from Lowes with a Banggood 3.5 watt laser and 5 passes at 80-100 mm/min with air-assist but I think that was the odd sheet. Not all plywoods cut equally well, even of the same thickness… I think it depends on the glue used in its manufacture. 1/8″ craft ply is probably pretty consistently cut with 4-5 passes, with or without air-assist.

    Craft sticks I cut with a single pass at 80-100 mm/min… no air-assist

    20180920_074316

    A couple of NEMA17 motor mounts in 4.7mm luan (again, I think this was the odd sheet)… air-assist helps with smoke-staining and number of passes

    141564_2e9d597aa3f0efb775a4dc4136f4948b

    Same ply… air-assist nozzle and laser shroud in background…

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    1/4″ is probably asking too much of a 3.5 watt laser… CO2 is definitely the better choice there.

    — David

     

     

     

     

    #71943

    dkj4linux
    Participant

    Followup showing my most successful cut with 3.5 watt laser and the air-assist setup I used. This was 5 passes, full-power, 100 mm/min, constant focus on top of material… it is crucial to get absolute best focus for cleanest, quickest cuts

    142199_da8f60e043906e03924bded27bc3e7b1

    142201_ab40209bc17681b805cf4cf720f18c6d

    142202_2eec6aec2e1128487a4acb006d979b74

    142203_d8b90c750817642473980e3b1eb54c0e

    142204_6846d981aee8b38a3f6fd30308da1fc9

    142205_146f10085f23a5a2cc9e6aceceeaa4d9

     

    1 user thanked author for this post.
    #72573

    Bryan
    Participant

    When you say “constant focus on top of the material”, do you lower the laser on every pass? Or do you keep the laser at a constant height for the entire cut?

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