Feature messurment offset

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  • Feature messurment offset

    Hello,

    I heave a part witch I measure tactile and with laser on a Global CMM on the same fixture.
    With the laser I get constant deviation to the tactile measurment. I would like to offset some laser mesured features for the difference, any ideas how? The nominals must stay the same, only the measured xyz need to be offset.

    The laser masurment needs to be fast so i don´t heave time to scan slower or 2 time to get better results, also the part does not help because the sheet matal parts are reflecting.

    Thanks, Bojan

  • #2
    Maybe it's the calibration of the laser which is bad ?
    How do you perform it ?
    How do you link tactile and laser calibration spheres ?

    Comment


    • #3
      With rfference tip I measure bouth spheres before I start auto calibration rutine. I also heave a rotine to chek tips one to another and the laser and it is within tolerance.

      GT_2_U_RE =ELEM//KREIS/STANDARD,KARTESISCH
      NENN/<-234.5,279.5,-185.6>,<0,0,-1>,16
      MESS/<-234.42,279.7,-185.98>,<0.0199961,0.0271286,-0.9994319>,16.77
      ZIEL/<-234.5,279.5,-185.6>,<0,0,-1>
      PROTOKOLLVEK=<0,0,-1>
      ELEMENTPARAMETER EINBLENDEN=NEIN
      LASERPARAMETER_ANZEIGEN=JA
      GT_2_U_RE_P=ELEMENT/PUNKT,KARTESISCH,NEIN
      NENN/<-234.75,279,-185.6>,<0,0,-1>
      MESS/<-234.67,279.2,-185.98>,<0.0199961,0.0271286,-0.9994319>
      KONST/PUNKT,VERSATZ,GT_2_U_RE,-0.25,-0.5,0

      Edit:

      This changes my nominals, not what I was aming for...

      Last edited by Bisky; 10-08-2020, 02:28 AM.

      Comment


      • #4
        Come up with a solution, it is far from simple....

        Measured feature:
        GT_2_U_RE =ELEM//KREIS/STANDARD,KARTESISCH
        NENN/<-234.5,279.5,-185.6>,<0,0,-1>,16
        MESS/<-234.42,279.7,-185.98>,<0.0199961,0.0271286,-0.9994319>,16.77
        ZIEL/<-234.5,279.5,-185.6>,<0,0,-1>
        PROTOKOLLVEK=<0,0,-1>
        ELEMENTPARAMETER EINBLENDEN=NEIN
        LASERPARAMETER_ANZEIGEN=JA

        Offset feature:
        TEST =BENUTZERDEFINIERT/KREIS,ABHÄNGIG,KARTESISCH,AUSSEN,$
        NENNW/XYZ,<GT_2_U_RE.TEX,GT_2_U_RE.TEY,GT_2_U_RE.TEZ>,$
        MESS/XYZ,<GT_2_U_RE.X+0.25,GT_2_U_RE.Y+0.5,GT_2_U_RE.Z> ,$
        NENNW/IJK,<0,0,-1>,$
        MESS/IJK,<0,0,-1>,$
        DURCHM/0,16

        yes my PC-Dmis is in German...

        Comment

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