Constructed Width Error

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  • #1

    Constructed Width Error

    I am measuring two planes PLN3 and PLN4, both in Z+. I would like to create a constructed width. I create a reverse plane from my top plane so it has normal Z-. Below it I have a plane with normal Z+. Constructed Width - 3D - In tells me "Math failed. Make sure that the areas of the inputs overlap." Any ideas?

    Code:
    PLN3       =FEAT/PLANE,CARTESIAN,TRIANGLE
            THEO/<0.0077,3.6373,-0.4381>,<0,0,1>
            ACTL/<0.0077,3.6373,-0.4381>,<0,0,1>
            MEAS/PLANE,12
              HIT/BASIC,NORMAL,<0.7345,2.8009,-0.4393>,<0,0,1>,<0.7345,2.8009,-0.4393>,USE THEO=YES
              HIT/BASIC,NORMAL,<1.1372,3.1103,-0.4394>,<0,0,1>,<1.1372,3.1103,-0.4394>,USE THEO=YES
              HIT/BASIC,NORMAL,<0.8622,3.3907,-0.4389>,<0,0,1>,<0.8622,3.3907,-0.4389>,USE THEO=YES
              HIT/BASIC,NORMAL,<0.8744,3.8481,-0.439>,<0,0,1>,<0.8744,3.8481,-0.439>,USE THEO=YES
              HIT/BASIC,NORMAL,<1.1022,4.2159,-0.4393>,<0,0,1>,<1.1022,4.2159,-0.4393>,USE THEO=YES
              HIT/BASIC,NORMAL,<0.7284,4.4898,-0.439>,<0,0,1>,<0.7284,4.4898,-0.439>,USE THEO=YES
              MOVE/POINT,NORMAL,<0.7301,4.4901,0.4984>
              MOVE/POINT,NORMAL,<-0.6193,4.4784,0.5005>
              HIT/BASIC,NORMAL,<-0.6868,4.4312,-0.4385>,<0,0,1>,<-0.6868,4.4312,-0.4385>,USE THEO=YES
              HIT/BASIC,NORMAL,<-1.0599,4.351,-0.4382>,<0,0,1>,<-1.0599,4.351,-0.4382>,USE THEO=YES
              HIT/BASIC,NORMAL,<-0.9681,3.7784,-0.4381>,<0,0,1>,<-0.9681,3.7784,-0.4381>,USE THEO=YES
              HIT/BASIC,NORMAL,<-0.8811,3.429,-0.4355>,<0,0,1>,<-0.8811,3.429,-0.4355>,USE THEO=YES
              HIT/BASIC,NORMAL,<-1.0716,3.0342,-0.4355>,<0,0,1>,<-1.0716,3.0342,-0.4355>,USE THEO=YES
              HIT/BASIC,NORMAL,<-0.6783,2.7679,-0.4362>,<0,0,1>,<-0.6783,2.7679,-0.4362>,USE THEO=YES
            ENDMEAS/
            MOVE/POINT,NORMAL,<-0.6767,2.7682,0.4246>
PLN4       =FEAT/PLANE,CARTESIAN,TRIANGLE
            THEO/<0.0229,3.6141,0>,<0,0,1>
            ACTL/<0.0229,3.6141,0>,<0,0,1>
            MEAS/PLANE,8
              HIT/BASIC,NORMAL,<-0.3579,3.0653,0>,<0,0,1>,<-0.3579,3.0653,0>,USE THEO=YES
              HIT/BASIC,NORMAL,<-0.6069,3.6415,0>,<0,0,1>,<-0.6069,3.6415,0>,USE THEO=YES
              HIT/BASIC,NORMAL,<-0.4311,4.0664,0>,<0,0,1>,<-0.4311,4.0664,0>,USE THEO=YES
              HIT/BASIC,NORMAL,<0.0132,4.2275,0>,<0,0,1>,<0.0132,4.2275,0>,USE THEO=YES
              HIT/BASIC,NORMAL,<0.4672,4.042,0>,<0,0,1>,<0.4672,4.042,0>,USE THEO=YES
              HIT/BASIC,NORMAL,<0.6088,3.666,0>,<0,0,1>,<0.6088,3.666,0>,USE THEO=YES
              HIT/BASIC,NORMAL,<0.4477,3.1581,0>,<0,0,1>,<0.4477,3.1581,0>,USE THEO=YES
              HIT/BASIC,NORMAL,<0.0425,3.0458,0>,<0,0,1>,<0.0425,3.0458,0>,USE THEO=YES
            ENDMEAS/
PLN5       =FEAT/PLANE,CARTESIAN,TRIANGLE,NO
            THEO/<0.0229,3.6141,0>,<0,0,-1>
            ACTL/<0.0229,3.6141,0>,<0,0,-1>
            CONSTR/PLANE,REV,PLN4
    Tags: None
    • Likes 1
  • #2
    First plane says it's -.4381, change all your hits to be the same.

    Code:
    PLN3       =FEAT/PLANE,CARTESIAN,TRIANGLE
            THEO/<0.0077,3.6373,-0.4381>,<0,0,1>
            ACTL/<0.0077,3.6373,-0.4381>,<0,0,1>
            MEAS/PLANE,12
              HIT/BASIC,NORMAL,<0.7345,2.8009[COLOR=#FF0000],-0.4381[/COLOR]>,<0,0,1>,<0.7345,2.8009,-0.4393>,USE THEO=YES
              HIT/BASIC,NORMAL,<1.1372,3.1103[COLOR=#FF0000],-[/COLOR][COLOR=#ff0000]0.4381[/COLOR]>,<0,0,1>,<1.1372,3.1103,-0.4394>,USE THEO=YES
              HIT/BASIC,NORMAL,<0.8622,3.3907[COLOR=#FF0000],-[/COLOR][COLOR=#ff0000]0.4381[/COLOR]>,<0,0,1>,<0.8622,3.3907,-0.4389>,USE THEO=YES
              HIT/BASIC,NORMAL,<0.8744,3.8481[COLOR=#FF0000],-0[/COLOR][COLOR=#ff0000].4381[/COLOR]>,<0,0,1>,<0.8744,3.8481,-0.439>,USE THEO=YES
              HIT/BASIC,NORMAL,<1.1022,4.2159[COLOR=#FF0000],-[/COLOR][COLOR=#ff0000]0.4381[/COLOR]>,<0,0,1>,<1.1022,4.2159,-0.4393>,USE THEO=YES
              HIT/BASIC,NORMAL,<0.7284,4.4898,-[COLOR=#ff0000]0.4381[/COLOR]>,<0,0,1>,<0.7284,4.4898,-0.439>,USE THEO=YES
              MOVE/POINT,NORMAL,<0.7301,4.4901,0.4984>
              MOVE/POINT,NORMAL,<-0.6193,4.4784,0.5005>
              HIT/BASIC,NORMAL,<-0.6868,4.4312,-[COLOR=#ff0000]0.4381[/COLOR]>,<0,0,1>,<-0.6868,4.4312,-0.4385>,USE THEO=YES
              HIT/BASIC,NORMAL,<-1.0599,4.351.-[COLOR=#ff0000]0.4381[/COLOR]>,<0,0,1>,<-1.0599,4.351,-0.4382>,USE THEO=YES
              HIT/BASIC,NORMAL,<-0.9681,3.7784,-[COLOR=#ff0000]0.4381[/COLOR]>,<0,0,1>,<-0.9681,3.7784,-0.4381>,USE THEO=YES
              HIT/BASIC,NORMAL,<-0.8811,3.429,-[COLOR=#ff0000]0.4381[/COLOR]>,<0,0,1>,<-0.8811,3.429,-0.4355>,USE THEO=YES
              HIT/BASIC,NORMAL,<-1.0716,3.0342,-[COLOR=#ff0000]0.4381[/COLOR]>,<0,0,1>,<-1.0716,3.0342,-0.4355>,USE THEO=YES
              HIT/BASIC,NORMAL,<-0.6783,2.7679,-[COLOR=#ff0000]0.4381[/COLOR]>,<0,0,1>,<-0.6783,2.7679,-0.4362>,USE THEO=YES
            ENDMEAS/
    (In Memory of my Loving wife, "Ronda" who I lost March 7, 2016. I love you baby.)
    They say "Nobody's Perfect." I must be Nobody.

    Comment

    • #3
      KIRBSTER269 Thanks for noticing that, I was just taking rough hits and didn't think to change them. Unfortunately that did not fix the issue.

      Comment

      • KIRBSTER269
        #3.1
        KIRBSTER269 commented
        11-18-2019, 09:16 AM
        Editing a comment
        You might try 2D since the 2 planes are at different locations one shows in the X direction .0077 and the other is .0229, the same with the Y direction, or clean those up also. Probably why it won't work
      • JacobCheverie
        #3.2
        JacobCheverie commented
        11-18-2019, 09:19 AM
        Editing a comment
        2D won't work with planes, and this is a datum. Cleaning up the position didn't change anything.
    • #4
      If your planes don't match then this is what your constructed width is try to do. which won't work. Your hits don't match, nor does your planes. Make your opposing planes match. Try Auto Planes also

      Untitled.jpg
      Last edited by KIRBSTER269; 11-18-2019, 09:33 AM.
      (In Memory of my Loving wife, "Ronda" who I lost March 7, 2016. I love you baby.)
      They say "Nobody's Perfect." I must be Nobody.

      Comment

      • #5
        KIRBSTER269 I went ahead and made two auto planes. Nominals are the same up to the difference in height (Z). Flipped one by using constructed reverse plane. Same error when trying to construct a width.

        It is an issue with reverse plane used for the width. When I flip the actual vectors of one of the planes (as if I could actually measure the part this way) the width constructs fine. Just not when I involve reverse plane...
        Last edited by JacobCheverie; 11-18-2019, 10:31 AM.

        Comment

        • #6
          I think it's just because a reverse plane doesn't contain hits, so it's an infinite plane, and you can't construct a width with it...
          Just my opinion...
          • Likes 2

          Comment

          • JacobCheverie
            #6.1
            JacobCheverie commented
            11-18-2019, 10:53 AM
            Editing a comment
            I think you're right. I will have to raise the part so that I can get under it. I was just trying to avoid extra rotations. Thanks JEFMAN
          • KIRBSTER269
            #6.2
            KIRBSTER269 commented
            11-18-2019, 11:23 AM
            Editing a comment
            Yeah just tried that got the same error, when I created the hits it worked.
        • #7
          Construct Width won't work on anything that doesn't contain points such as construct reverse plane. You can try to do a workaround by constructing generic points and plugging in the xyzijk of your leveling plane but add in a *-1 on the vector to flip it then construct plane using those generic points. This will allow the construct width feature to work.

          DISCLAIMER: I actually haven't done any live testing of the above method. Haven't had the need. Only tried it in an offline theoretical situation. So triple check your results!
          • Likes 1

          Comment

          • #8
            Could it be the active workplane??
            Time for the Trolls to leave.

            Comment

            • #9
              As already has been said, a WIDTH can only be constructed from opposing planes, containing hits. The idea from Sora5 is interesting, and might work, but you risk getting the position of the width wrong if you use BFRE in the construction. Also, I have noted problems now and the when mixing 'real hits' and 'constructed hits' in the same construction command.
              Last edited by AndersI; 11-19-2019, 07:40 AM.
              AndersI
              SW support - Hexagon Metrology Nordic AB

              Comment

              • Incredible.Mr.Lucas
                #9.1
                Incredible.Mr.Lucas commented
                10-31-2022, 11:42 AM
                Editing a comment
                Since this comment was written, have you any more experience with mixing measured and constructed points in constructions? Did it just not work, and if so, why do you think that is?
            • #10
              Originally posted by Sora5 View Post
              Construct Width won't work on anything that doesn't contain points such as construct reverse plane. You can try to do a workaround by constructing generic points and plugging in the xyzijk of your leveling plane but add in a *-1 on the vector to flip it then construct plane using those generic points. This will allow the construct width feature to work.

              DISCLAIMER: I actually haven't done any live testing of the above method. Haven't had the need. Only tried it in an offline theoretical situation. So triple check your results!
              The Idea from Sora5 is interesting indeed. Creating generic points and tying them to the actuals of the measured points and mathing the vectors. Have any of you ever tried this? Will a width work with planes constructed from generic points like this? do those count as "measured" points?

              How would one efficiently do this with scan data? I can think of a way with reference variables and a loop, but that seems tedious. Can anyone think of more elegant method of accomplishing this task?

              Comment

              • #11
                I know this is a super old thread but I have found a way that works pretty well actually two different ways,

                1.)Take your plane that you want to reverse the vector points and construct plane out of it use num.hits then manually change the vector and update actual, then construct the width from this and the lets say top plane.

                2.) same thing take the plane you want to reverse the vector on and point cloud this feature then construct plane out of that point cloud, then manually flip the vector and update actual this works also


                PLN1 =FEAT/CONTACT/PLANE/DEFAULT,CARTESIAN,TRIANGLE,LEAST_SQR
                THEO/<-2.7325,-1.507,-0.03>,<0,0,1>
                ACTL/<-2.7325,-1.507,-0.03>,<0,0,1>
                TARG/<-2.7325,-1.507,-0.03>,<0,0,1>
                ANGLE VEC=<1,0,0>,SQUARE
                SHOW FEATURE PARAMETERS=NO
                SHOW CONTACT PARAMETERS=NO

                PLN2 =FEAT/CONTACT/PLANE/DEFAULT,CARTESIAN,TRIANGLE,LEAST_SQR
                THEO/<-3.5873,-1.7536,-3.375>,<0,0,1>
                ACTL/<-3.5873,-1.7536,-3.375>,<0,0,1>
                TARG/<-3.5873,-1.7536,-3.375>,<0,0,1>
                ANGLE VEC=<1,0,0>,SQUARE
                SHOW FEATURE PARAMETERS=NO
                SHOW CONTACT PARAMETERS=NO

                PLN4 =FEAT/PLANE,CARTESIAN,TRIANGLE,YES,LEAST_SQR
                THEO/<-3.5873,-1.7536,-3.375>,<0,0,-1>
                ACTL/<-3.5873,-1.7536,-3.375>,<0,0,-1>
                CONSTR/PLANE,BF,PLN2.HIT[1..PLN2.NUMHITS],,
                OUTLIER_REMOVAL/OFF,3
                FILTER/OFF,WAVELENGTH=0

                COP1 =COP/DATA,TOTAL SIZE=9,REDUCED SIZE=9,
                FINDNOMS=NO,REF=PLN2,,

                PLN3 =FEAT/PLANE,CARTESIAN,TRIANGLE,YES,LEAST_SQR
                THEO/<-3.5873,-1.7536,-3.375>,<0,0,-1>
                ACTL/<-3.5873,-1.7536,-3.375>,<0,0,-1>
                CONSTR/PLANE,BF,COP1,,
                OUTLIER_REMOVAL/OFF,3
                FILTER/OFF,WAVELENGTH=0

                WIDTH1 =FEAT/WIDTH,CARTESIAN,OUT,LEAST_SQR,NO
                THEO/<-3.1599,-1.6303,-1.7025>,<0,0,-1>,3.345
                MEAS/<-3.1599,-1.6303,-1.7025>,<0,0,-1>,3.345
                CONSTR/WIDTH,BF,PLN1,PLN3

                WIDTH2 =FEAT/WIDTH,CARTESIAN,OUT,LEAST_SQR,NO
                THEO/<-3.1599,-1.6303,-1.7025>,<0,0,-1>,3.345
                MEAS/<-3.1599,-1.6303,-1.7025>,<0,0,-1>,3.345
                CONSTR/WIDTH,BF,PLN1,PLN4​

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