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Thread: RF vs DC excited lasers... engraving/spot size question

  1. #16
    Quote Originally Posted by Kev Williams View Post
    I've never advertised, never needed to. Could be G-graph feels they don't need to?
    If they are happy making what they make then maybe so. However, the big 3 have reaped in millions in sales, so I'm guessing that France doesn't care about the US Market that much.

    I think about Gravograph the same as I do Xenetech (which we own). They are built like tanks. Built to last, no doubt.

    Our Trotec is the same as your Gravograph. It just runs.
    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.

  2. #17
    Had an opportunity to snag a gravograph at a gov auction last year but passed on it. It wasn't any more powerful than my Epilog and I'm pretty well committed to getting something a bit more powerful for my next laser. 30 watts seems pretty marginal for doing rubber stamps.

  3. #18
    Join Date
    Mar 2008
    Location
    Savusavu, Fiji
    Posts
    1,167
    I was pretty happy with my Epilog at 45 watts. However, jumping to 80 and then 100+, even with DC tubes, has made many jobs much much faster and easier. I cut and engrave a lot of curved items (especially coconut shell) and the increased power makes the lack of exact focus much less of an issue. I cut my rubber stamps out a lot faster than my Epilog could.
    Longtai 460 with 100 watt EFR, mostly for fun. More power is good!! And a shop with enough wood working tools to make a lot of sawdust. Ex-owner of Shenhui 460-80 and engraving business with 45 watt Epilog Mini18.

  4. #19
    Join Date
    Dec 2010
    Location
    NW Arkansas
    Posts
    1,611
    Blog Entries
    1
    Speed isn't everything though in Raster engraving....... Can that 30 or 40 watt RF mark with Cermark as fast or faster than my 80 watt? I run it at 165mm/s or 6.5 ips. Which even with the Chinese laser seems really slow..... but it sticks.....
    Just say'n....
    Woodworking, Old Tools and Shooting
    Ray Fine RF-1390 Laser
    Ray Fine 20watt Fiber Laser
    PM2000, Delta BS, Delta sander, Powermatic 50 jointer,
    Powermatic100-12 planer, Rockwell 15-126 radial drill press
    Rockwell 46-450 lathe, and 2 Walker Turner RA1100 radial saws

    RIA 22TCM 1911s

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