How can I measure this True Position?

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  • How can I measure this True Position?

    I have this round part and this true position frame. The part is a stator stack so it has a height. I just don't understand what feature can I create in order to get this measured. The drawing says that planes M2, M3 and M4 must be considered in the dimension. I took six points, one on each plane, 3 on each side of the lamination and then I tried to build a Square Slot out of those points but it didn't work. How can I do it?
    Attached Files

  • #2
    Have you tried constructing a width feature?

    Comment


    • Hirxm
      Hirxm commented
      Editing a comment
      Yes but it doesn't let me construct it. If I construct two opposing lines and then check 2D feature when building the Width feature, the two lines don't show up on the features list which means I'm not able to construct it.

    • A-machine-insp
      A-machine-insp commented
      Editing a comment
      Hirxm try a 3d width. Not saying it will work but it's something to try.

  • #3
    Measure -A-, -B-, and -C-.

    Create ABC alignment.

    Create a new alignment that uses ABC as the RECALL alignment and offset/rotate so you're square to the slot geometry in two axes.

    Probe geometry as a "width". Report TP of the width.
    SF7107(PCD), SF454(PCD), 152614(Quindos), 9159(Quindos), 7107(Quindos), B&S Manual, M&M Gear Checker

    Comment


    • Hirxm
      Hirxm commented
      Editing a comment
      Thanks but I understand the alignment part. What I can't understand is what feature can I build in that area, since a square slot is not working for me.

    • DAN_M
      DAN_M commented
      Editing a comment
      I gotcha, check comment #4

  • #4
    Hirxm

    This should do it.

    Treat the slot as a generic circle. Force the generic circle's location and diameter to be dependent on a midplane and the two planes that create the midplane.

    Code:
    PLN1 =FEAT/CONTACT/PLANE/DEFAULT,CARTESIAN,NONE,LEAST_SQR
    THEO/<0,0,-0.6>,<1,0,0>
    ACTL/<0,0,-0.6>,<1,0,0>
    TARG/<0,0,-0.6>,<1,0,0>
    ANGLE VEC=<1,0,0>,RADIAL
    SHOW FEATURE PARAMETERS=NO
    SHOW CONTACT PARAMETERS=NO
    PLN2 =FEAT/CONTACT/PLANE/DEFAULT,CARTESIAN,NONE,LEAST_SQR
    THEO/<0.5,0,-0.6>,<-1,0,0>
    ACTL/<0.5,0,-0.6>,<-1,0,0>
    TARG/<0.5,0,-0.6>,<-1,0,0>
    ANGLE VEC=<1,0,0>,RADIAL
    SHOW FEATURE PARAMETERS=NO
    SHOW CONTACT PARAMETERS=NO
    PLN3 =FEAT/PLANE,CARTESIAN,TRIANGLE,NO
    THEO/<0.25,0,-0.6>,<1,0,0>
    ACTL/<0.25,0,-0.6>,<1,0,0>
    CONSTR/PLANE,MID,PLN1,PLN2
    DIM DIST1= 2D DISTANCE FROM PLANE PLN1 TO PLANE PLN2 PAR TO XAXIS,NO_RADIUS UNITS=IN,$
    GRAPH=OFF TEXT=OFF MULT=10.00 OUTPUT=NONE
    AX MEAS NOMINAL +TOL -TOL DEV OUTTOL
    M 0.5000 0.5000 0.0004 0.0004 0.0000 0.0000 ----#----
    CIR1 =GENERIC/CIRCLE,DEPENDENT,CARTESIAN,OUT,$
    NOM/XYZ,<0.25*1,0*1,-0.6*1>,$
    MEAS/XYZ,<PLN3.X,PLN3.Y,PLN3.Z>,$
    NOM/IJK,<0*1,0*1,1*1>,$
    MEAS/IJK,<0*1,0*1,1*1>,$
    DIAMETER/0.5*1,DIST1.MEAS
    DIM LOC1= POSITION OF CIRCLE CIR1 UNITS=IN ,$
    GRAPH=OFF TEXT=OFF MULT=10.00 OUTPUT=BOTH FIT TO DATUMS=OFF DEV PERPEN CENTERLINE=OFF DISPLAY=DIAMETER
    AX MEAS NOMINAL +TOL -TOL BONUS DEV OUTTOL
    X 0.2500 0.2500 0.0000
    DF 0.5000 0.5000 0.0004 0.0004 0.0000 0.0000 ----#----
    TP 0.0000 RFS 0.01000 0.0000 0.0000 0.0000 #--------
    END OF DIMENSION LOC1
    If you don't have enough space to make planes, you could do this same method but with lines or singular points.
    Last edited by DAN_M; 02-24-2021, 02:10 PM.
    SF7107(PCD), SF454(PCD), 152614(Quindos), 9159(Quindos), 7107(Quindos), B&S Manual, M&M Gear Checker

    Comment


    • Hirxm
      Hirxm commented
      Editing a comment
      Thanks, i'm gonna give it a try to this. Just one more question, what are the "*1" on the nominals and measured values of the generic circle for?

  • #5
    Hirxm adding a "*1" makes the input in that field controlled by a math equation INSTEAD of just a regular old number. PCD will change nominals sometimes (IF its a number) and make your code look annoying but it won't change an equation.

    All we care about is the X,Y,Z, and ACTUAL DIA....<--that stuff is normal...

    ..everything else we "lock" it to it's nominal value with the "*1".

    Hope this make sense
    SF7107(PCD), SF454(PCD), 152614(Quindos), 9159(Quindos), 7107(Quindos), B&S Manual, M&M Gear Checker

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    • #6
      I do not see a diametrical sign Ø in front of the .7, I would treat this FCF as a positional location using + & -, just my thought.

      Comment


      • #7
        Originally posted by oddam View Post
        I do not see a diametrical sign Ø in front of the .7, I would treat this FCF as a positional location using + & -, just my thought.
        Yes, is only a 1 axis true position
        SF7107(PCD), SF454(PCD), 152614(Quindos), 9159(Quindos), 7107(Quindos), B&S Manual, M&M Gear Checker

        Comment

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