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IndustryArena Forum > Mechanical Engineering > Mechanical Calculations/Engineering Design > Need help with calculating tool nose compensation
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  1. #1

    Need help with calculating tool nose compensation

    Hey guys, Im writing a CNC program (not a g-code) for a lathe machine and im having some trouble with calculating the tool radius compensation needed for arc cutting.
    When the arc angle is 90 degrees there's no problem, the problem is when i want to cut an arc that is less than that.
    Are there any formulas for calculating the compensation needed with dependece on the tool radius and the arc radius?

    Thanks!

  2. #2
    Member
    Join Date
    Jun 2015
    Posts
    3531

    Re: Need help with calculating tool nose compensation

    When the arc angle is 90 degrees there's no problem
    hy can you join several 90 degress arches, that have different radius, and different centers, and are not tangent ?

    handling rad comp requires offseting and sometimes auxiliar geometry in between not tangent entities

    please share a bit more details, maybe an example, so to see exactly where you get stuck, and i will help you / kindly
    Ladyhawke - My Delirium, https://www.youtube.com/watch?v=X_bFO1SNRZg

  3. #3
    Registered
    Join Date
    Mar 2009
    Posts
    1697

    Re: Need help with calculating tool nose compensation

    "calculated" tool path for 90°, covers the path for less, right? Just find the point of transition to the next shape element.

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