constructing a plane out of coincidental planes?

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  • constructing a plane out of coincidental planes?

    Am i wrong but i figured it would be a simple venture to take two planes that are on opposite sides of the part, called out as datum C, and construct a full connected plane? I used auto plane to scan both sides and can't figure out how to combine them?

  • #2
    I find it easier to make a series of auto-points, then later in the program CONSTRUCT a plane out of those points. Mainly because it is a pain in the butt to 'deconstruct' a plane (or a series of planes), then reconstruct another.

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    • #3
      Create a scan out of the hits of both features, then construct a plane out of the scan.

      Code:
      PLN1 =FEAT/PLANE,CARTESIAN,OUTLINE
      THEO/<0,15.25,0>,<0,0,1>
      ACTL/<0,15.25,0>,<0,0,1>
      MEAS/PLANE,8
      HIT/BASIC,NORMAL,<-13,10,0>,<0,0,1>,<-13,10,0>,USE THEO=YES
      HIT/BASIC,NORMAL,<-10,16.5,0>,<0,0,1>,<-10,16.5,0>,USE THEO=YES
      HIT/BASIC,NORMAL,<-3,15.5,0>,<0,0,1>,<-3,15.5,0>,USE THEO=YES
      HIT/BASIC,NORMAL,<-3,19,0>,<0,0,1>,<-3,19,0>,USE THEO=YES
      HIT/BASIC,NORMAL,<3,19,0>,<0,0,1>,<3,19,0>,USE THEO=YES
      HIT/BASIC,NORMAL,<3,15.5,0>,<0,0,1>,<3,15.5,0>,USE THEO=YES
      HIT/BASIC,NORMAL,<10,16.5,0>,<0,0,1>,<10,16.5,0>,USE THEO=YES
      HIT/BASIC,NORMAL,<13,10,0>,<0,0,1>,<13,10,0>,USE THEO=YES
      ENDMEAS/
      PLN2 =FEAT/PLANE,CARTESIAN,OUTLINE
      THEO/<0,-15.25,0>,<0,0,1>
      ACTL/<0,-15.25,0>,<0,0,1>
      MEAS/PLANE,8
      HIT/BASIC,NORMAL,<-13,-10,0>,<0,0,1>,<-13,-10,0>,USE THEO=YES
      HIT/BASIC,NORMAL,<-10,-16.5,0>,<0,0,1>,<-10,-16.5,0>,USE THEO=YES
      HIT/BASIC,NORMAL,<-3,-15.5,0>,<0,0,1>,<-3,-15.5,0>,USE THEO=YES
      HIT/BASIC,NORMAL,<-3,-19,0>,<0,0,1>,<-3,-19,0>,USE THEO=YES
      HIT/BASIC,NORMAL,<3,-19,0>,<0,0,1>,<3,-19,0>,USE THEO=YES
      HIT/BASIC,NORMAL,<3,-15.5,0>,<0,0,1>,<3,-15.5,0>,USE THEO=YES
      HIT/BASIC,NORMAL,<10,-16.5,0>,<0,0,1>,<10,-16.5,0>,USE THEO=YES
      HIT/BASIC,NORMAL,<13,-10,0>,<0,0,1>,<13,-10,0>,USE THEO=YES
      ENDMEAS/
      SCN1 =FEAT/SET,CARTESIAN
      THEO/<0,0,0>,<0,0,1>
      ACTL/<0,0,0>,<0,0,1>
      CONSTR/SET,BASIC,PLN1.HIT[1..PLN1.NUMHITS],PLN2.HIT[1..PLN2.NUMHITS],,
      PLN3 =FEAT/PLANE,CARTESIAN,TRIANGLE,NO
      THEO/<0,0,0>,<0,0,1>
      ACTL/<0,0,0>,<0,0,1>
      CONSTR/PLANE,BF,SCN1,,
      OUTLIER_REMOVAL/OFF,3
      FILTER/OFF,WAVELENGTH=0

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      • #4
        I scan both sides of the part and construct planes for each of them, then construct a width feature to be used as the datum.

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        • Mike Ruff
          Mike Ruff commented
          Editing a comment
          I believe he is referring to a single plane with the middle portion missing, not two opposing planes

        • BKulpa
          BKulpa commented
          Editing a comment
          By his last comment on the topic I finally understand.
          Duh!
          Last edited by BKulpa; 01-29-2020, 12:08 PM.

      • #5
        There's a script in the Code section for doing this - https://www.pcdmisforum.com/forum/pc...many#post32186
        AndersI
        SW support - Hexagon Metrology Nordic AB

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        • davehocum
          davehocum commented
          Editing a comment
          Andersl, thank you for the code example moving features from ListBox to ListBox.

        • A-machine-insp
          A-machine-insp commented
          Editing a comment
          Taking this. Thanks AndersI . Even thought you are retiring, your DMIS legacy will live on.

      • #6
        Can auto line scans be used to create a plane?

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        • #7
          Originally posted by granto View Post
          Can auto line scans be used to create a plane?
          Select the lines, then add .HIT[1..NUMHITS] as shown in RandomJerk's example above with the planes.
          PC-DMIS 2016.0 SP8

          Jeff

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          • #8
            Originally posted by granto View Post
            Am i wrong but i figured it would be a simple venture to take two planes that are on opposite sides of the part, called out as datum C, and construct a full connected plane? I used auto plane to scan both sides and can't figure out how to combine them?
            I am confused on why a connected plane. For an external width (opposite planes) the datum is the center plane isn't?
            Last edited by Roberto; 01-29-2020, 09:13 AM.
            sigpicIt's corona time!
            737 Xcel Cad++ v2009MR1....SE HABLA ESPAƑOL

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            • #9
              I have two co-planer surfaces on the under side of the part separated by a cutout in the center as my datum c. I was trying to take each section as auto planes and then construct a bigger plane that covers both, that didn't work. I then tried auto lines and construct a plane between them still no good. So i made freeform scans on either surface then was finally able to construct those into a full plane. Thank you for the help everyone being new im really trying to find the limits of the software. I know there are a thousand ways to do everything im PC-dmis so i have found it easier to look for the limits and stay away form these features.

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