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  1. #1
    Join Date
    Apr 2018
    Posts
    2

    Default Building a curve with an equation

    Hey Guys,

    I have been trying to build the evolvent of a Gear in CATIA V5 and I want to use the following formulas for the curve:
    x = R*(sin(f)-f*cos(f))
    y = R*(cos(f)+f*sin(f))
    Where x and y are the coordinates,R is a know konstant and f is a number going from 0 to a specific number (which will be defined by another formula, but lets say for this case it will be =0.67).
    Can any one please tell me how to do it?

    Thank you!

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  2. #2
    Join Date
    Jul 2006
    Posts
    1,682

    Default

    I've seen several videos and tutorials on the internet explaining how to make a CATIA curve based on an equation.

    I found this one (using the same equations as yours) that provides two solutions: 1. use CATIA Laws and 2. use Excel macro to compute involute coordinates for CATIA

    http://www.eng-tips.com/viewthread.cfm?qid=227675
    Last edited by MrCATIA; April 6th, 2018 at 07:15 AM.

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  3. #3
    Join Date
    Apr 2018
    Posts
    2

    Default

    Thanks that's helpful. I suppose if u want to use it to create a Gear it will be too complicated to be worth it. My idea was to make one and just change the parameters to become other sizes.

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