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Thread: Cylinder machine

  1. #1
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    Cylinder machine

    I have a coburn 506 thatís been in the lab for years and itís always worked however, recently itís began to give us nothing but issues when doing poly lenses. We have checked every possible cause and we canít see to locate I‎t.
    The problem we are having are finer marks. They donít fine out and wonít polish out. Sometimes they donít show up until the lens is coated.

    Help!

    -jonathan

  2. #2
    Master OptiBoarder OptiBoard Silver Supporter lensmanmd's Avatar
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    Quote Originally Posted by riverviewjonathan View Post
    I have a coburn 506 that’s been in the lab for years and it’s always worked however, recently it’s began to give us nothing but issues when doing poly lenses. We have checked every possible cause and we can’t see to locate I‎t.
    The problem we are having are finer marks. They don’t fine out and won’t polish out. Sometimes they don’t show up until the lens is coated.

    Help!

    -jonathan
    You will need to check your stroke and orbit first. I haven't touched these in years, so I can't tell you what they should be. Fining, I think, is 26mm orbit and polishing around 30. Your pin pressure should be 18psi.
    If the pads are tearing off, your axis is off. You should check those, too

  3. #3
    Ghost in the OptiMachine OptiBoard Silver Supporter Quince's Avatar
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    Try a more abrasive fining pad or adjusting your times and pressure like lensmanmd suggested.

    Also look into how old your polish is. Old polish makes for a sloppy final product.

    I feel your pain though- when the coater makes defects evident my heart sinks!
    Have I told you today how much I hate poly?

  4. #4
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    i was having similar issues with fining marks on my finished lens, mostly Transitions lens in my case. we had a Gerber Tech in the lab one day and he suggested this upgrade that wasnt Gerber related so we checked it out. and to our surprise kinda easy to install. We upgraded 1 set of our 506's with otleys. we have enjoyed them and the machine isnt as loud when running as it used to be. Pro:you dont have to get in the floor and grease the machine anymore.. you still have to grease the top side though. Con: you have to go the extra mile to seal the baffles from polish or water getting to the machine.(rust) it did help with the fining and took out the side to side play. heres the link to what we put into our machines. good luck.

    http://www.inlanddiamond.com/optical...s-and-parts-2/

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