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Profile of surface

hellofriends

Hello guys, I would need a bit of help as I'm trying to measure this profile of surface dimension. I've been using Hexagon Performance 7.10.7 CMM machine for about 5 months, but this is the first project in which I need to measure profile of surface depended on three datum sufaces A/B/C. For datum A, I tried taking the line of surface, than making a plane, but it always shows me that axis on datum A and datum C are parallel or coincident. Datum B is I assume the circle which I scan and than make constructed circle. For the measurement I scan the radius and use that scan to get profile of surface. 

Can you help me on how to take datums A,B,C and is it correct to scan the radius and use it for my dimension. 


  • 0

    If I had the part with datum A facing up, it would be the a plane of the surface with the recycle symbol, since the datum line and triangle are pointing towards the face, B the circle, and C a plane on the side?

    Datum A Level Z, origin Z with plane, rotate Z+ about the C plane, Datum B circle X and Y origin?

  • 0

    Looks like you need a plane with at least 4 points for datum A (6+ would be better) then a Circle for the diameter of datum B, and a line or plane for datum C.

  • 0 in reply to ArkansasBeeper

    When I do that, it says first and third plane axis are parallel and it won't let me get the measurement

  • 0 in reply to hellofriends

    Are you doing it like I mentioned in my post? They should not be parallel, but perpendicular. Are you using the face with the Recycle symbol for Datum A? It is showing the side of the part, but the datum triangle is pointing towards the face. Similar to how C is showing the other face of the part, but the Datum triangle is pointing to the "left" or away from the face, to the side of the part.

  • 0 in reply to WilliamL

    Yah I'm lost too... Those should be perpendicular. 
    Post your code.

  • 0 in reply to WilliamL

    I did exactly as you told and with or without alignment it says they are parallel. 

  • 0 in reply to ArkansasBeeper

    STARTUP =ALIGNMENT/START,RECALL:USE_PART_SETUP,LIST=YES
    ALIGNMENT/END
    MODE/MANUAL
    FLY/ON
    FORMAT/TEXT,OPTIONS, ,HEADINGS,SYMBOLS, ;MEAS,NOM,DEV,TOL,OUTTOL, ,
    LOADPROBE/ZVEZDA RAZLICITA
    TIP/T1A0B0, SHANKIJK=0, 0, 1, ANGLE=0

    PLN1 =FEAT/CONTACT/PLANE/DEFAULT,CARTESIAN,OUTLINE,LEAST_SQR
    THEO/<176.5431,76.0469,-631.9672>,<0,0,1>
    ACTL/<205.2684,66.9443,-642.2566>,<-0.0149829,-0.0185292,0.9997161>
    TARG/<176.5431,76.0469,-631.9672>,<0,0,1>
    ANGLE VEC=<0.9995163,0,-0.0311005>,SQUARE
    SHOW FEATURE PARAMETERS=NO
    SHOW CONTACT PARAMETERS=YES
    NUMHITS=3,NUMROWS=3
    SPACER=0
    AVOIDANCE MOVE=BOTH,DISTANCE=10
    USE BOUNDARY OFFSET=NO
    SHOW HITS=NO

    PLN2 =FEAT/CONTACT/PLANE/DEFAULT,CARTESIAN,OUTLINE,LEAST_SQR
    THEO/<176.5431,76.0469,-631.9672>,<0,0,1>
    ACTL/<253.7335,89.8507,-635.6324>,<0.9967371,-0.0200802,0.078179>
    TARG/<176.5431,76.0469,-631.9672>,<0,0,1>
    ANGLE VEC=<0.9995163,0,-0.0311005>,SQUARE
    SHOW FEATURE PARAMETERS=NO
    SHOW CONTACT PARAMETERS=YES
    NUMHITS=3,NUMROWS=3
    SPACER=0
    AVOIDANCE MOVE=BOTH,DISTANCE=10
    USE BOUNDARY OFFSET=NO
    SHOW HITS=NO

    CIR2 =FEAT/CONTACT/CIRCLE/DEFAULT,CARTESIAN,OUT,LEAST_SQR
    THEO/<176.5431,76.0469,-631.9672>,<0,0,1>,50,6
    ACTL/<214.4606,109.8673,-631.9672>,<0,0,1>,54.8891,6
    TARG/<176.5431,76.0469,-631.9672>,<0,0,1>
    START ANG=0,END ANG=360
    ANGLE VEC=<0.9995163,0,-0.0311005>
    DIRECTION=CCW
    SHOW FEATURE PARAMETERS=NO
    SHOW CONTACT PARAMETERS=YES
    NUMHITS=10,DEPTH=5,PITCH=0
    SAMPLE METHOD=SAMPLE_HITS
    SAMPLE HITS=0,SPACER=0
    AVOIDANCE MOVE=BOTH,DISTANCE=10
    FIND HOLE=DISABLED,ONERROR=NO,READ POS=NO
    SHOW HITS=NO

    A1 =ALIGNMENT/START,RECALL:STARTUP,LIST=YES
    ALIGNMENT/LEVEL,ZPLUS,PLN1
    ALIGNMENT/TRANS,ZAXIS,PLN1
    ALIGNMENT/TRANS,ZAXIS,PLN1
    ALIGNMENT/ROTATE,XPLUS,TO,PLN2,ABOUT,ZPLUS
    ALIGNMENT/TRANS,XAXIS,PLN2
    ALIGNMENT/TRANS,XAXIS,CIR2
    ALIGNMENT/TRANS,YAXIS,CIR2
    ALIGNMENT/END

    MODE/DCC
    SCN1 =FEAT/SCAN,LINEAROPEN,NUMBER OF HITS=460,SHOW HITS=NO,SHOWALLPARAMS=YES
    EXEC MODE=NORMAL, NOMS MODE=MASTER,CLEARPLANE=NO,SINGLE POINT=NO,THICKNESS=0
    FINDNOMS=5,SELECTEDONLY=NO,USEBESTFIT=NO,PROBECOMP=NO,AVOIDANCE MOVE=NO,DISTANCE=0.1,CAD Compensation=NO,4-axis scan=NO
    DIR1=LINE,INCR=0.3
    HITTYPE=VECTOR
    INITVEC=0.9809406,-0.1935739,0.0168709
    DIRVEC=-0.843607,-0.5369611,-0.0001197
    CUTVEC=0.0131582,-0.0204496,-0.9997043
    ENDVEC=-0.9949033,-0.1002273,-0.0110448
    PLANEVEC=0.0999718,-0.9947544,0.0216642
    POINT1=252.6061,65.0968,-639.9733
    POINT2=174.3097,71.8329,-639.9944
    MEAS/SCAN
    BASICSCAN/LINE,NUMBER OF HITS=460,SHOW HITS=NO,SHOWALLPARAMS=YES
    <252.6061,65.0968,-639.9733>,<174.3097,71.8329,-639.9945>,CutVec=0.0131582,-0.0204496,-0.9997043,DirVec=-0.843607,-0.5369611,-0.0001197
    InitVec=0.9809406,-0.1935739,0.0168709,EndVec=-0.9949032,-0.1002274,-0.0110448,THICKNESS=0
    FILTER/DISTANCE,0.3
    EXEC MODE=NORMAL
    BOUNDARY/PLANE,<174.3097,71.8329,-639.9945>,PlaneVec=0.0999719,-0.9947544,0.0216642,Crossings=1
    HITTYPE/VECTOR
    NOMS MODE=MASTER
    ENDSCAN


    ENDMEAS/DATDEF/FEATURE=PLN1,A
    DATDEF/FEATURE=CIR2,B
    DATDEF/FEATURE=PLN2,C

  • 0 in reply to hellofriends

    your theo vectors of plane2 are wrong.

    THEO/<176.5431,76.0469,-631.9672>,<0,0,1>
    ACTL/<253.7335,89.8507,-635.6324>,<0.9967371,-0.0200802,0.078179>

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