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  1. #11
    Quote Originally Posted by PEU View Post
    This is the attitude that I like to hear! I have discussed a hand mill with colleagues and due to the parameters that we would have to work with wouldn't be an option, nobody here would trust themselves eyeballing the depth going through the PCB.

    As for holding the chip in place as we will be destroying the board regardless, I am thinking of cutting the chip out from the board so it will sit flat on its back and some sort of adhesive to hold it down.

    You mentioned about being able to CNC it within budget, would this be with the chinese cnc machines found on ebay?

    Thanks for the reply.
    Grate! Good luck.
    Last edited by A_Camera; 31-03-2017 at 06:19 PM.

  2. #12
    Quote Originally Posted by PEU View Post
    This is the attitude that I like to hear! I have discussed a hand mill with colleagues and due to the parameters that we would have to work with wouldn't be an option, nobody here would trust themselves eyeballing the depth going through the PCB.
    You don't eyeball, you fit a DRO to the Z axis (digital caliper bodged on is popular) and measure the PCB thickness, set zero for the lower surface and you're good to go for precision depth milling ;-)

    Quote Originally Posted by PEU View Post
    You mentioned about being able to CNC it within budget, would this be with the chinese cnc machines found on ebay?
    Crikey No! They're Shite! If the Proxxon does the job manually just add steppers, drivers etc.
    To cut down on leg work you could look for something like -

    http://www.robotpark.com/Robotpark-MF-70-CNC-Kit

    Not saying that one is any good but read reviews and Google around a bit and preferably find a supplier you can visit if things are going particularly Pete Tong ;-)

    ATB,
    Nick
    You think that's too expensive? You're not a Model Engineer are you? :D

  3. #13
    Quote Originally Posted by A_Camera View Post
    Grate! Good luck.
    Sound advice as always :D
    You think that's too expensive? You're not a Model Engineer are you? :D

  4. #14
    m_c's Avatar
    Lives in East Lothian, United Kingdom. Last Activity: 4 Hours Ago Has been a member for 9-10 years. Has a total post count of 1,792. Received thanks 189 times, giving thanks to others 5 times.
    Trying it manually first would be my suggestion as well.

    The hardest part will be finding the balance between mounting the chip/pcb securely, and how much of a cut you can take without the chip/pcb moving. I'm sure you don't need anybody to mention that you'll most likely want to experiment on some already scrapped items.

    The only benefit you'll get from CNC is being able to set it up and leave it to do the bulk of the work, as you'll most likely need to adjust the depth slightly to get within the required tolerances for the final cut(s).

    To go with Nick's conversion kit suggestion above, I'm sure I came across a german supplier of kits a while back, but my google skills are failing to find anything. They did however turn up this Danish supplier kit - http://cnchobby.dk/en/cnc-machines/4...0-cnc-kit.html
    Avoiding the rubbish customer service from AluminiumWarehouse since July '13.

  5. #15
    PEU's Avatar
    Lives in Hampshire, United Kingdom. Last Activity: 05-04-2017 Has been a member for 0-1 years. Has a total post count of 6.
    Thank you very much, I will be speaking with my supervisor about getting the manual machine ordered with some callipers!

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