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Thread: replacement lens help

  1. #1
    Join Date
    May 2008
    Location
    Fennimore, Wi
    Posts
    189

    replacement lens help

    been reading all the posts regarding this, this is my first time replacing a lens, a little confused.
    gcc laserpro spirit 40W
    standard 2" focal lenz
    have a call into laser research, waiting for call back. 165.00 not mounted
    looking on ebay, everything out there seems to be in metric terms and im not good at converting. they look alot cheaper.
    can someone tell me if i should just go with laser research or is ebay good to use. if so what sizes am i looing for out there.
    thanks alot
    chad
    Chad Fitzgerald
    Hickory Grove Cabinetry
    Custom Woodworking/Laser Engraving
    Laser Pro Spirit 40W
    ShopSabre RC4 CNC
    55x49 cut area
    with 3 1/4 PC Router, 10" Z

  2. #2
    Join Date
    Aug 2006
    Location
    Suwanee, GA
    Posts
    3,686
    Chad,
    Measure the diameter of your lens then draw a circle that size in Corel. Change the measurement units to millimeters and you don't have to convert anything - I believe yours are .75" which is 19.05 mm. If you aren't sure if it will fit then cut one out of rowmark at the size they are selling and see if it fits in your lens holder. There have been lots of people that use the cheap(er) ebay lenses and I have heard of very few problems. Mostly it has to do with focus - their 2" lens may actually be more or less than that and you'll have to adjust your focus to suit.

  3. #3
    Join Date
    Mar 2005
    Location
    Gig Harbor, WA
    Posts
    1,157
    Mark
    In the Great Northwest!

    Trotec Speedy C25, Newing-Hall 350 (AMC I & HPGL), NH-CG-30 (Carbide Cutter Sharpener)
    Sawgrass 400 Gel Ink Printer, CS5, 5/9/x6 CorelDraw

  4. #4
    Hi
    you can just type in google 2 inches in mm and google will convert for you. Same for all other possible convertion.
    Shenhui laser 60W, corel Draw X5.

  5. #5
    Join Date
    May 2008
    Location
    Fennimore, Wi
    Posts
    189
    thanks for the advice and chart. i forgot to mention, im still using the lens, still in the holder. I just want to have one on hand for backup. im afraid to take it out of the holder and measure it with the caliper in fear of scratching it. looks easy enough to remove, just a couple of set screws, but again dont want to handle it. it does look like 3/4" but when talking with laser research(they were very helpful by the way) he mentioned it is likely 3/4 BUT could be .746 in. , if i gfet the wrong one may not fit or may be sloppy fit. also thickness they said was important as well. both ways i need to measure with caliper to get exact dimensions.
    So i guess my question really is, how do i find this out without removing it from the holder??? kinda hoping someone had the same machine and already knows.
    Suppose i could contact, GCC or my rep, but assuming they may not like the idea of me wanting to go elsewhere for the lens. maybe that shouldnt worry me but.
    thanks again.
    Chad Fitzgerald
    Hickory Grove Cabinetry
    Custom Woodworking/Laser Engraving
    Laser Pro Spirit 40W
    ShopSabre RC4 CNC
    55x49 cut area
    with 3 1/4 PC Router, 10" Z

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