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  1. #1
    Join Date
    Nov 2007
    Posts
    68

    Question touch probe rotation cycle

    dear all,

    i have the following question

    1- if i have an inclined (not straight) rectangular block on machine bed, how to get its center points (in X and Y) with the inclination angle ?? i mean how to use axes rotation cycle to measure this inclined block via touch probe??

    the machine control is Fanuc 0imc
    the touch probe used is : Blum TC50 ( a German brand like Renishaw )

    the macro used in measuring cycle in attachment (the main macro is 9700 and all sub macros from 9701 to 9709)
    Attached Files Attached Files

  2. #2
    Join Date
    Feb 2006
    Posts
    1792
    On a 3-axis machine, it may not be possible.

    State your problem more clearly, preferably with a drawing, and write what exactly you want to measure.

    I am not able to open the file attached by you.

  3. #3
    Join Date
    Nov 2007
    Posts
    68
    thanks Sinha for your reply,

    the problem in details as follow:

    i want to measure the center point of a rectangular die on machine center bed.

    we usually use a dial indicator to make this die 100% horizontally .

    we need to use this Blum to measure the center point of this die without using indicator (to save setup time).

    the machine move as photo number 1 and this cause the center to be wrong.

    we need to make the machine path like photo number 2.

    i hope it's clear now

    for the file in previous attach it was for measuring cycle (macro programs ).

    i will attach it again.
    Attached Thumbnails Attached Thumbnails 1.jpg   2.jpg  
    Attached Files Attached Files

  4. #4
    Join Date
    Nov 2006
    Posts
    175
    Measuring center points by X and Y (look at brown lines) will give you the figure center. After that you should measure also the rotation angle
    Attached Thumbnails Attached Thumbnails PIC2.jpg  

  5. #5
    Join Date
    Feb 2006
    Posts
    1792
    I have derived formulae for a similar problem (finding the angle of an edge, and the coordinates of the lower left corner of a rotated rectangle). If you are interested, let me know. I would post these here.

  6. #6
    Join Date
    Nov 2007
    Posts
    68
    yes please we need this formula badly

  7. #7
    Join Date
    Feb 2006
    Posts
    1792
    Formulae attached.

    I located the lower left corner, and the angle of the lower edge with X-axis. You need the center. So, more derivation is needed, after touching the workpiece from all sides.
    Attached Files Attached Files

  8. #8
    Join Date
    Nov 2007
    Posts
    68
    Dear Sinha,

    the document you attached is helpful, but what if i need the coordinates of program zero point to be in the center of the workpiece (i mean not in the lower corner) ??

    is it possible, if yes how can i do this ??

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