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Monitoring a drill acceleration

  1. Mar 30, 2015 #1

    i am working on a project, trying to monitor, the accelerating of a handdrill, while drilling ( and thus being able to register the slip when the drill go through the other edge of the wood panel ).
    I was thinking about using an accelerometer or a linear potentiometer as a sensor to achieve that ? but is it precise enough to do the job, any idea og suggestion how to achieve that the best way ?.

    Any help will be appreciated. Thanks
    Last edited: Mar 30, 2015
  2. jcsd
  3. Mar 30, 2015 #2


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    Science Advisor

    There are problems with metering fluted twist drills.
    For sensible feed-rates, the cutting edge on a drill will usually pull the drill into the material.
    If the drill comes out the other side then it may pull through on the flutes without cutting.
    The central part of the drill does not cut. It follows a pilot hole or it deforms and displaces material outwards.
    The profile of the cutting edges and relief angle may be adapted for different materials and feed-rates.

    A hand drill will be very difficult to meter based on axial displacement alone. You will need to know the actual feed rate, the hand force applied and rotational torque, to have any idea what is happening.

    How much experience do you have drilling with a hand drill ?
    Have you drilled deep holes in wood ?
    Have you drilled holes through thin sheet metal ? with or without a pilot hole ?
    Have you ever drilled into thick PVC, nylon or copper with a drill sharpened to the standard profile ?


    For better help you need to be more specific about your application.
    What type of drill bit will you use, in what type of material, of what thickness ?
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