1. #1
    Retro fit core drill for motorised z axis, suggestions.

    I have a new project and I want to cut some cores out of stone so I'm thinking of getting a, not so expensive bench core drill, and retro fitting the z axis so I can be cutting the cores slowly but efficiently and doing other things at the same time.

    I'm thinking a pulley and motor may slip .. unless say I use a toothed car cam wheel type setup ? Direct stepper motor may be a bit to large to produce the torque ? Not sure I'm no expert :)

    Example pic

    Click image for larger version. 

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    its basically a very small version of this below which i think is really cool lol :)


    Fiction is far more plausible when wrapped around a thread of truth

    Nothing great was ever achieved without enthusiasm.
    Ralph Waldo Emerson

  2. #2
    Do you need fixed feed speed or fixed cutting pressure?
    You think that's too expensive? You're not a Model Engineer are you? :D

  3. #3
    Quote Originally Posted by magicniner View Post
    Do you need fixed feed speed or fixed cutting pressure?
    I was thinking fixed cutting pressure , cutting speed would depend on material and also help tool life I think.. not sure lol

    I had thought of putting a wide pulley on and fixed weight on a chain, seen this done for other things
    Last edited by Fivetide; 08-06-2018 at 06:00 PM.

    Fiction is far more plausible when wrapped around a thread of truth

    Nothing great was ever achieved without enthusiasm.
    Ralph Waldo Emerson

  4. #4
    Quote Originally Posted by Fivetide View Post
    I had thought of putting a wide pulley on and fixed weight on a chain,
    My thoughts too, if fixed force.
    For fixed speed a stepper, stepper driver, variable frequency pulse generator and toothed pulleys & belts.
    You think that's too expensive? You're not a Model Engineer are you? :D

  5. The Following User Says Thank You to magicniner For This Useful Post:


  6. #5
    Quote Originally Posted by magicniner View Post
    My thoughts too, if fixed force.
    For fixed speed a stepper, stepper driver, variable frequency pulse generator and toothed pulleys & belts.
    Yes agreed.. I think ill try that.. keep it simple rule. Thanks magicniner

    Fiction is far more plausible when wrapped around a thread of truth

    Nothing great was ever achieved without enthusiasm.
    Ralph Waldo Emerson

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