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  1. #16
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    Quote Originally Posted by elanjacobs View Post
    Waterjet has about a 1mm wide cut, so no good there. EDM would be the go if you know someone who has one
    Thanks for your answer!

    What is EDM?

  2. #17
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    Quote Originally Posted by frnnd View Post
    Thanks for your answer!

    What is EDM?
    Electrical discharge machining. Electricity is passed through a very thin wire that basically burns the material away. It's a relatively slow process compared to laser cutting, but much more precise; down to micron level tolerance.

  3. #18
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    There is this video on youtube that explains briefly at 0:55
    It shows a circular saw but with some kind of oil...

    https://www.youtube.com/watch?v=RXf924CGLbs

    The comb I want to make doesn't need to be as small as the on in the picture.
    I need a comb that works and has a way of doing it, if possible.

  4. #19
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    Hi Bob, Guys,

    Quote Originally Posted by BobL View Post
    Anyone for EDM
    Yes wire EDM would probably do the job ! Though I can't imagine making the frame to hold 16 tungsten wires.
    Best Regards:
    Baron J.

  5. #20
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    If you have a lathe or a mill you could use a slitting saw ,with appropriate custom fixture and coolant

  6. #21
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    1) The mechanism with the metal comb costs like 5 bucks, so I imagine that it's not a expensive or complex procedure to make all of those cuts.
    Considering that, what could be the possible procedure used in making this small metal comb?

    2) I don't need to make a really small comb like that, if the cuts needs to be wide, so be it. Whats procedure can I use considering that I need precision in those cuts?

    In the video I mentioned before, they use some kind of circular saw with some oil to make the cut. Does anyone know that procudure and machine?

    This is a pic of the video:

    circular saw.jpg

  7. #22
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    Hi Frnnd, Guys,

    That would be quite easy to do on the lathe, and you can get slitting saws of almost any thickness. I have some that are only 5 thou thick, but its very easy to strip the teeth off those or break them.

    The slitting you have seen in that video is done under CNC control.
    Best Regards:
    Baron J.

  8. #23
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    Quote Originally Posted by frnnd View Post
    "cutting in carbon steel [1020] 0.5mm thick has no way to do it because the laser will melt the fine parts of the comb, this type of cut we recommend making in stainless steel"
    I don't think either of those metals are suitable for the comb. They are heat treated after cutting to give the ringing sound. Untreated steel would sound very dull.

    This article talks about the combs being heated to 'glass hard' after cutting. I don't think you can achieve that with 1020.

    https://www.thenakedwatchmaker.com/m...ened)%20twice.
    Chris

  9. #24
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    Quote Originally Posted by BaronJ View Post
    Though I can't imagine making the frame to hold 16 tungsten wires.
    You don't, it's a single brass wire that just follows a toolpath.

  10. #25
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    A stack of slitting saws of the required thickness, with spacers between them.
    Low revs - you approximate the speed of a hacksaw blade. Low feed rate to match.
    The oil is to wash the swarf away, which can be crucial. Nothing like a jam.
    I have done similar with a manual mill, and with a CNC. I use HSS, but you can get carbide.

    Cheers
    Roger

  11. #26
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    Not sure a stack would work with each slot being a different length...

  12. #27
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    each slot being a different length...
    Oops!
    Oh well, CNC with a single slitting saw, multiple cuts. It's just g-code ...

    Cheers
    Roger

  13. #28
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    Considering the comb in the picture is from a really cheap mechanism from China, there has to be a inexpensive way to do it.

    I costs less than a dollar for just one entire mechanism.

    https://www.aliexpress.com/item/10000133302865.htm

    How can they make it so cheap considering that the comb is something more complex than the other parts?

    Should be possible to do it with a plate of aluminum?

    Thank you all for your answers!

  14. #29
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    Quote Originally Posted by frnnd View Post
    How can they make it so cheap considering that the comb is something more complex
    CNC with a slitting saw like your video probably

  15. #30
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    Quote Originally Posted by elanjacobs View Post
    CNC with a slitting saw like your video probably
    But the cuts are literally a hairthin thickness. I rip out a string of my head to measure.

    There are a slitting saw thin like that?

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