True Position Callout

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  • True Position Callout

    Good Morning All!
    I have this part (shown below) that I am trying to program the true position for. My initial alignment for the part was aligned to the center of the OD and plane -A-. I have adjusted my alignment so that XPLUS is lined up with the 15° BSC dimension (the center line of the slot). I measured the slot as a measured slot and I am able to output my FCF correctly but when it measures it shows on the report that the SLTS1 measures at 44.4526. I do not know where it gets that measurement from. Any ideas on why or how to fix?
    Attached Files

  • #2
    Here is the code for the adjusted alignment, the measured slot, and TP.

    DCC_ALIGNMENT_2=ALIGNMENT/START,RECALL:STARTUP,LIST=YES
    ALIGNMENT/LEVEL,ZPLUS,PLN2
    ALIGNMENT/TRANS,ZAXIS,PLN2
    ALIGNMENT/TRANS,XAXIS,CYL4
    ALIGNMENT/TRANS,YAXIS,CYL4
    ALIGNMENT/ROTATE_CIRCLE,XPLUS,TO,CYL4,AND,CYL3,ABOUT,ZPLUS
    ALIGNMENT/END
    SLTS1 =FEAT/SQUARE_SLOT,CARTESIAN,IN
    THEO/<0.000003,-0.000016,-1.04>,<0,0,1>,<0.9659283,-0.2588097,0>,0.92,0
    ACTL/<0.000003,-0.000016,-1.04>,<0,0,1>,<0.9659284,-0.2588093,0>,0,0
    MEAS/SLOT,8,ZPLUS
    HIT/BASIC,NORMAL,<2.180772,-0.459995,-0.060444>,<-0.0000097,1,0>,<2.180772,-0.459995,-0.060444>,USE THEO=YES
    HIT/BASIC,NORMAL,<2.333541,-0.459994,-0.061506>,<-0.0000097,1,0>,<2.333541,-0.459994,-0.061506>,USE THEO=YES
    HIT/BASIC,NORMAL,<2.526177,-0.459992,-0.057095>,<-0.0000097,1,0>,<2.526177,-0.459992,-0.057095>,USE THEO=YES
    HIT/BASIC,NORMAL,<2.734214,-0.45999,-0.06998>,<-0.0000097,1,0>,<2.734214,-0.45999,-0.06998>,USE THEO=YES
    HIT/BASIC,NORMAL,<2.729095,0.46001,-0.05925>,<0.0000097,-1,0>,<2.729095,0.46001,-0.05925>,USE THEO=YES
    HIT/BASIC,NORMAL,<2.529612,0.460008,-0.071844>,<0.0000097,-1,0>,<2.529612,0.460008,-0.071844>,USE THEO=YES
    HIT/BASIC,NORMAL,<2.370401,0.460007,-0.070693>,<0.0000097,-1,0>,<2.370401,0.460007,-0.070693>,USE THEO=YES
    HIT/BASIC,NORMAL,<2.183035,0.460005,-0.080503>,<0.0000097,-1,0>,<2.183035,0.460005,-0.080503>,USE THEO=YES
    ENDMEAS/
    MOVE/CLEARPLANE
    SEQUENCE#47 =POSITION : SLTS1
    FEATCTRLFRAME/SHOWNOMS=NO,SHOWPARAMS=YES,SHOWEXPANDED=YES,
    CADGRAPH=OFF,REPORTGRAPH=OFF,TEXT=OFF,MULT=10.00,A RROWDENSITY=100,OUTPUT=BOTH,UNITS=IN,
    COMPOSITE=NO,FIT TO DATUMS=YES,DEV PERPEN CENTERLINE=ON,OUTPUT ALIGNMENT=Current Alignment
    CUSTOMIZED DRF=NO
    STANDARDTYPE=ASME_Y14_5
    PRIMARY DIMENSION/POSITION,0.005,MMC,<PZ>,<len>,A,B,MMC,0.801,C,MMC, 0.53
    SECONDARY DIMENSION/,<tol>,<MC>,<dat>,<dat>,<dat>
    NOTE/SEQUENCE#47
    FEATURES/SLTS1,,

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    • #3
      Try changing your OUTPUT ALIGNMENT from Current Alignment to Datum Reference Frame. Also, I'd suggest removing the keyed-in material boundary sizes, leaving them default should be fine unless you were explicitly directed to do so.

      Should this not be a planar tolerance zone? Which axes are you reporting Position in?
      Last edited by JacobCheverie; 11-01-2019, 01:49 PM.

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      • #4
        What is CYL4? in your alignment? In your FCF you have CYL1 as Datum B. Since you are doing manual hits on the slot, clean up the nominals. Your Z heights vary and the Y axis hits are not equal and centered about Datum C. Since Datum B is offset from the center of the piece, are your offsets correct in the program? And yes, you should be in a planar zone as well.


        In addition, remove the pound symbol from your naming feature. Only use numbers, letters, and underscores.

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