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Thread: Optical Centre Punch - #TMC2020

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    MachineNZ's Tools

    Optical Centre Punch - #TMC2020

    Hi Everyone,
    This is my entry for the #TMC2020 :



    For those of you that don't know Emma Ritzen (Youtube Channel: Emmas Spareroom Machine Shop) is running a tool making competition on Youtube.
    Type #TMC2020 into Youtube to watch videos from creators who have entered.

    Regards
    Kevin Campkin

    173 Best Homemade Tools eBook

  2. The Following 3 Users Say Thank You to MachineNZ For This Useful Post:

    Altair (Jul 29, 2020), Jon (Jul 21, 2020), old_toolmaker (Jul 21, 2020)

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    th62's Tools
    Interesting! I made one some time ago but couldn't get a convex shate good enough to magnify clearly so I just polished the end flat and scribed crosses top and bottom. To get the cross hairs as fine as possible i used a sharpened hacksaw blade. I also lit mine with an LED.
    Attached Thumbnails Attached Thumbnails Optical Centre Punch - #TMC2020-cp.jpg  

  4. The Following User Says Thank You to th62 For This Useful Post:

    Altair (Jul 29, 2020)

  5. #3

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    MachineNZ's Tools
    Quote Originally Posted by th62 View Post
    Interesting! I made one some time ago but couldn't get a convex shate good enough to magnify clearly so I just polished the end flat and scribed crosses top and bottom. To get the cross hairs as fine as possible i used a sharpened hacksaw blade. I also lit mine with an LED.
    Hi there, yes the lens has to be a particular shape thats why I researched online using one of the many Lens calculators.
    Yours looks cool with the LED

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    th62's Tools
    How did you get the curve, just by eye?

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    Thanks MachineNZ! We've added your Optical Center Punch to our Measuring and Marking category,
    as well as to your builder page: MachineNZ's Homemade Tools. Your receipt:




  8. #6
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    Thanks th62! We've added your Optical Center Punch to our Measuring and Marking category,
    as well as to your builder page: th62's Homemade Tools. Your receipt:






    173 Best Homemade Tools eBook

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