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Thread: Max Depth on 30W Fiber // Deep Cutting Routines

  1. #1
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    Question Max Depth on 30W Fiber // Deep Cutting Routines

    As to not hijack from others, aside from a brute force standpoint is there a method to deep engrave on metals that is considered standard? Point of clarification: I am engraving my Glock slide. So far I can get about a 0.5mm before the machine seems to "bottom out". I would love to hear any input. Being as that I ran many hours of passes today I was able to test just about everything...hatch type, spacing, speed etc. It seems that depth [on 30W fiber] is achieved at around 250/200 mm/s at 100p with clean-ups in between. What do you all think?
    Epilog Legend 36EXT ~35W
    30W Fiber Laser
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  2. #2
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    You can definitely go deeper than that, I have many times. It could be that you are at the bottom of the focal range of your lens and it is so slow to go any deeper that it seems like it has bottomed out. I lasered a 1/2" square areas completely through a piece of 1/8" stainless just to see if I could. It was a long time ago and I don't have the settings saved, but it was something like: 100% power, 100 mm/s, 30 Freq, and two hatches with auto-incrementing hatch angle (I forget what that's called in the software). The closer you are to dead center below the lens the easier it will be to get deep, otherwise you are trying to cut through at an angle and making any focus problems much worse. Oh, and the piece will be very hot - even a 4" x 6" piece will heat up a lot getting deeper than .01". I may, or may not have, burned myself after it was done...
    I have done so much with so little for so long, that I can do almost anything with practically nothing...

    Trotec Speedy 400 80 watt 8/2015
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    G. Weike LF-30, 30 watt galvo fiber - 3/2015
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  3. #3
    "Auto Rotate"

    This is my 30w Triumph engraving a steel seal mold a couple years ago, when it was engraving all whacko-
    mold.jpg

    Look close on the mold itself, the first 5, the 9 and the -01 all have visible 'other' engraving. That was a fun time...
    mold1.jpg
    But- it still managed to engrave to somewhere between 3 & 4mm deep. It can be done
    ========================================
    ELEVEN - rotary cutter tool machines
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    CASmate, Corel, Gravostyle


  4. #4
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    g22rtf2.jpg
    This is where I am at currently. I would love to drop some weight and even punch through some windows to expose the barrel... My autorotate seemed to be stuck on 10 degrees yesterday so I'll certainly need to revisit. Yes, it got warm, and we always strive to work dead center of the table. Will post back results when/as I am able. Today I need to get some billing done.
    Epilog Legend 36EXT ~35W
    30W Fiber Laser
    Corel X6
    AutoCAD 2019
    FFL 01
    Some Patience

  5. #5
    you're every bit as deep there as the mold engraving if not more. Not sure you'll ever get clear thru that slide, tall order for a 30 watt light bulb

    Auto rotate- sometimes it doesn't work and it's usually because it's conflicting with some other variable, make sure the edge offset, line reduction etc numbers are zeroed out. You'll know the rotate is working when you revisit the hatch routine window and the 'angle' number is in the thousands

    When I use auto rotate I usually set it to a goofy number like 31 degrees, my thought being the hatch lines will rarely repeat/engrave on top of each other, or at least until the original metal is long gone. The Tykma 'how to run a fiber' manual states in many places to run many loops when deep engraving, and in my mind that's counter-productive; when you engrave the same line over and over you get to a point where the metal slags up and just falls into the cut. I proved this to myself went trying to cut a .030" thick SS sawblade for a customer, after so many passes it simply would not go any deeper. If I autorotate a crosshatch 30 degrees, every 3 passes the hatch angle repeats, but at 31 degrees, the hatch angle is skewed 3 degrees from original, and it will take 26 more passes to hit the original hatch alignment. And by then it won't matter. Doing this, the laser is always cutting 'fresh' material. Just seems to me to be more efficient than engraving the same lines 30 times...
    Last edited by Kev Williams; 06-28-2019 at 1:26 PM.
    ========================================
    ELEVEN - rotary cutter tool machines
    FOUR - CO2 lasers
    THREE - fiber lasers
    ONE - vinyl cutter
    CASmate, Corel, Gravostyle


  6. #6
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    Okay so, back to this. I mic'ed the top of the slide, ~2.25mm. I have since punched all the way through with surprising little time/effort. I changed my routine and went with 100mm/s as suggested. Edge is good, no burrs.

    20190701_135137.jpg
    Glock Window.jpg
    Last edited by Chris DeGerolamo; 07-02-2019 at 1:09 PM. Reason: added addl image
    Epilog Legend 36EXT ~35W
    30W Fiber Laser
    Corel X6
    AutoCAD 2019
    FFL 01
    Some Patience

  7. #7
    https://www.youtube.com/watch?v=T1pKIv--Nh4
    check out what this guy has to say. I want one of those lenses for my 50w. he is cutting through glock slides with a 20w.
    Micro Welding, Laser Engraving, and Cerakote.
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  8. #8
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    Quote Originally Posted by Tony South View Post
    https://www.youtube.com/watch?v=T1pKIv--Nh4
    check out what this guy has to say. I want one of those lenses for my 50w. he is cutting through glock slides with a 20w.
    This guy is only a few hours away; been watchin' his videos...good stuff. Note he admitted his 20W Qswitch was heavily modded. Thanks for posting.
    Epilog Legend 36EXT ~35W
    30W Fiber Laser
    Corel X6
    AutoCAD 2019
    FFL 01
    Some Patience

  9. #9
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    How does one heavily modify a laser? Also, any idea about that lens?
    Universal 60w VLS6.60 w/ rotary
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    Fab shop with South Bend Heavy 10, Bridgeport 9x42, 185a welder and a multitude of supporting tools/equipment

  10. #10
    Quote Originally Posted by Trey Tull View Post
    How does one heavily modify a laser? Also, any idea about that lens?
    I have messaged that guy on Instagram and asked him what his heavily modded laser consists of. He told me he had Upgraded software and that huge lens. so much for heavily modded haha.
    Micro Welding, Laser Engraving, and Cerakote.
    Alpha Laser-150w
    yag laser welder
    Laser Star-80w yag laser welder
    Laser Marking Technologies
    Marksman Dominator-50w galvo fiber-raycus
    Miller Snycrowave 350 LX
    C
    erakote applicator
    Clausing-8520 milling machine
    South Bend-Lathe


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