Leveling Plane Points Used

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  • Leveling Plane Points Used

    When using a plane for leveling how does PC-DMIS determine what points from a plane to level to? Are the points averaged and then leveled to? Does it use 3 worst deviations high and low?

    Do you know what (actual) points from this plane would be used?

    Code:
    [FONT=Calibri]PLN_T =FEAT/CONTACT/PLANE/DEFAULT,CARTESIAN,OUTLINE,LEAST_SQR[/FONT]
    [FONT=Calibri]THEO/<0,0,0>,<0,-1,0>[/FONT]
    [FONT=Calibri]ACTL/<0,-0.00003,0>,<0.0000025,-1,0.0000002>[/FONT]
    [FONT=Calibri]TARG/<0,0,0>,<0,-1,0>[/FONT]
    [FONT=Calibri]ANGLE VEC=<1,0,0>,RADIAL[/FONT]
    [FONT=Calibri]SHOW FEATURE PARAMETERS=NO[/FONT]
    [FONT=Calibri]SHOW CONTACT PARAMETERS=YES[/FONT]
    [FONT=Calibri]NUMHITS=13,NUMRINGS=1[/FONT]
    [FONT=Calibri]SPACER=7.7025[/FONT]
    [FONT=Calibri]AVOIDANCE MOVE=BEFORE,DISTANCE=0.3[/FONT]
    [FONT=Calibri]SHOW HITS=YES[/FONT]
    [FONT=Calibri]HIT/BASIC,<7.7025,0,0>,<0,-1,0>,<7.70283,-0.00077,-0.00003>[/FONT]
    [FONT=Calibri]HIT/BASIC,<6.72085,0,3.51286>,<0,-1,0>,<6.72126,-0.00276,3.51292>[/FONT]
    [FONT=Calibri]HIT/BASIC,<4.37552,0,6.33903>,<0,-1,0>,<4.37591,-0.00035,6.33902>[/FONT]
    [FONT=Calibri]HIT/BASIC,<0.92843,0,7.64634>,<0,-1,0>,<0.92882,0.00214,7.64638>[/FONT]
    [FONT=Calibri]HIT/BASIC,<-2.73134,0,7.20196>,<0,-1,0>,<-2.73104,0.00209,7.20212>[/FONT]
    [FONT=Calibri]HIT/BASIC,<-5.7654,0,5.1077>,<0,-1,0>,<-5.76498,0.00002,5.10785>[/FONT]
    [FONT=Calibri]HIT/BASIC,<-7.47868,0,1.84333>,<0,-1,0>,<-7.47822,-0.00202,1.8433>[/FONT]
    [FONT=Calibri]HIT/BASIC,<-7.47868,0,-1.84333>,<0,-1,0>,<-7.47832,-0.00196,-1.84336>[/FONT]
    [FONT=Calibri]HIT/BASIC,<-5.7654,0,-5.1077>,<0,-1,0>,<-5.76501,0.00038,-5.10773>[/FONT]
    [FONT=Calibri]HIT/BASIC,<-2.73134,0,-7.20196>,<0,-1,0>,<-2.73096,0.00135,-7.20215>[/FONT]
    [FONT=Calibri]HIT/BASIC,<0.92843,0,-7.64634>,<0,-1,0>,<0.92881,0.00054,-7.64637>[/FONT]
    [FONT=Calibri]HIT/BASIC,<4.37552,0,-6.33903>,<0,-1,0>,<4.37587,0.00008,-6.33907>[/FONT]
    [FONT=Calibri]HIT/BASIC,<6.82023,0,-3.57953>,<0,-1,0>,<6.82072,0.00088,-3.57952>[/FONT]
    [FONT=Calibri]ENDMEAS/[/FONT]
    Jesse Krook

  • #2
    You have the algorithm set to LEAST_SQUARES so it would calculate a plane based on that - similar to the average.
    Neil Challinor
    PC-DMIS Product Owner

    T: +44 870 446 2667 (Hexagon UK office)
    E: [email protected]

    Comment


    • #3
      In later versions (maybe 2016 onward but I'm not 100% on this) there is a constructed Tangent plane which will create a plane from tangent to the three highest points. Typically very useful for alignments.
      Applications Engineer
      Hexagon UK

      Comment


      • #4
        Originally posted by neil.challinor View Post
        You have the algorithm set to LEAST_SQUARES so it would calculate a plane based on that - similar to the average.
        That's kind of what I thought Thank you
        Jesse Krook

        Comment


        • #5
          If you level and origin Y on PLN_T, then, you can ASSIGN/V1=PLN_T.HIT[1..13].Y, it will give you an array of plus and minus values around zero.

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