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Additional MMC

MattyRyan
Hey everyone,

I apologize if this seems redundant, I tried looking through the forum first before posting.

I see quite a few topics about feature control frame call-outs of multiple diameters with MMC and how to apply it in PCDMIS. I'm still not entirely sure I've come across the answer (if I did and someone has that information I'd greatly appreciate it). I've tried a few different ways to apply it, but nothing gets me to the answer I know I should have (based on diameter sizes, etc.). I'm simply looking for the steps on how to apply the additional MMC. The following is what I'm looking to dimension out in PCDMIS.



Any help on this is greatly appreciated. Again, I apologize if this sounds like a redundant question, I'm just really stumped at the moment.
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  • I would do this--> 

    STARTUP =ALIGNMENT/START,RECALL:USE_PART_SETUP,LIST=YES
ALIGNMENT/END
FORMAT/TEXT,OPTIONS,ID,HEADINGS,SYMBOLS, ;MEAS,NOM,TOL,DEV,OUTTOL, ,
MODE/MANUAL
LOADPROBE/7107_Y_3X40
TIP/T1A0B0, SHANKIJK=0, 0, 1, ANGLE=0
PLN1 =FEAT/PLANE,CARTESIAN,TRIANGLE
THEO/<3.5778,2.1876,0>,<0,0,1>
ACTL/<3.5778,2.1876,0>,<0,0,1>
MEAS/PLANE,3
HIT/BASIC,NORMAL,<1.439,1.6553,0>,<0,0,1>,<1.439,1.655 3,0>,USE THEO=YES
HIT/BASIC,NORMAL,<4.2759,4.2457,0>,<0,0,1>,<4.2759,4.2 457,0>,USE THEO=YES
HIT/BASIC,NORMAL,<5.0185,0.6618,0>,<0,0,1>,<5.0185,0.6 618,0>,USE THEO=YES
ENDMEAS/
LIN1 =FEAT/LINE,CARTESIAN,UNBOUNDED
THEO/<3.208,0,-0.4>,<-1,0,0>
ACTL/<3.208,0,-0.4>,<-1,0,0>
MEAS/LINE,2,ZPLUS
HIT/BASIC,NORMAL,<3.208,0,-0.4>,<0,-1,0>,<3.208,0,-0.5473>,USE THEO=YES
HIT/BASIC,NORMAL,<0.5219,0,-0.4>,<0,-1,0>,<0.5219,0,-0.3441>,USE THEO=YES
ENDMEAS/
PNT1 =FEAT/POINT,CARTESIAN
THEO/<0,0.4,-0.4>,<-1,0,0>
ACTL/<0,0.4,-0.4>,<-1,0,0>
MEAS/POINT,1,WORKPLANE
HIT/BASIC,NORMAL,<0,0.4,-0.4>,<-1,0,0>,<0,0.5854,-0.4828>,USE THEO=YES
ENDMEAS/
A1 =ALIGNMENT/START,RECALL:STARTUP,LIST=YES
ALIGNMENT/LEVEL,ZPLUS,PLN1
ALIGNMENT/ROTATE,XMINUS,TO,LIN1,ABOUT,ZPLUS
ALIGNMENT/TRANS,XAXIS,PNT1
ALIGNMENT/TRANS,YAXIS,LIN1
ALIGNMENT/TRANS,ZAXIS,PLN1
ALIGNMENT/END
MODE/DCC
CLEARP/ZPLUS,PLN1.Z+0.5,ZPLUS,0,ON
PLN_A =FEAT/PLANE,CARTESIAN,TRIANGLE
THEO/<3.978,2.3522,0>,<0,0,1>
ACTL/<3.978,2.3522,0>,<0,0,1>
MEAS/PLANE,6
MOVE/CLEARPLANE
HIT/BASIC,NORMAL,<1.6382,0.6522,0>,<0,0,1>,<1.6382,0.6 522,0>,USE THEO=YES
HIT/BASIC,NORMAL,<1.2434,3.3522,0>,<0,0,1>,<1.2434,3.3 522,0>,USE THEO=YES
HIT/BASIC,NORMAL,<3.8184,4.2542,0>,<0,0,1>,<3.8184,4.2 542,0>,USE THEO=YES
HIT/BASIC,NORMAL,<4.4872,0.6272,0>,<0,0,1>,<4.4872,0.6 272,0>,USE THEO=YES
HIT/BASIC,NORMAL,<6.1292,0.7734,0>,<0,0,1>,<6.1292,0.7 734,0>,USE THEO=YES
HIT/BASIC,NORMAL,<6.5516,4.4543,0>,<0,0,1>,<6.5516,4.4 543,0>,USE THEO=YES
ENDMEAS/
MOVE/CLEARPLANE
CIR_B =FEAT/CONTACT/CIRCLE/DEFAULT,CARTESIAN,IN,LEAST_SQR
THEO/<3.1496,2.3622,0>,<0,0,1>,14.02
ACTL/<3.1496,2.3622,0>,<0,0,1>,14.02
TARG/<3.1496,2.3622,0>,<0,0,1>
START ANG=0,END ANG=360
ANGLE VEC=<1,0,0>
DIRECTION=CCW
SHOW FEATURE PARAMETERS=NO
SHOW CONTACT PARAMETERS=NO
A2 =ALIGNMENT/START,RECALL:A1,LIST=YES
ALIGNMENT/LEVEL,ZPLUS,PLN_A
ALIGNMENT/ROTATE,XMINUS,TO,LIN1,ABOUT,ZPLUS
ALIGNMENT/TRANS,XAXIS,CIR_B
ALIGNMENT/TRANS,YAXIS,CIR_B
ALIGNMENT/TRANS,ZAXIS,PLN_A
ALIGNMENT/END
MOVE/CLEARPLANE
CIR_C =FEAT/CONTACT/CIRCLE/DEFAULT,POLAR,IN,LEAST_SQR
THEO/<7.4,271.5,0>,<0,0,1>,0.215
ACTL/<7.4,271.5,0>,<0,0,1>,0.215
TARG/<7.4,271.5,0>,<0,0,1>
START ANG=0,END ANG=360
ANGLE VEC=<1,0,0>
DIRECTION=CCW
SHOW FEATURE PARAMETERS=NO
SHOW CONTACT PARAMETERS=NO
LIN_OFFSET_BC=FEAT/LINE,CARTESIAN,UNBOUNDED,YES
THEO/<0,0,0>,<0,-1,0>
ACTL/<0,0,0>,<0,-1,0>
CONSTR/LINE,OFFSET
SURFACE NORMAL = <0,0,1>,MULTI POINT
ID = CIR_B,CIR_C,,
OFFSET = 0,-0.1937
ALI_ABC =ALIGNMENT/START,RECALL:STARTUP,LIST=YES
ALIGNMENT/LEVEL,ZPLUS,PLN_A
ALIGNMENT/ROTATE,YMINUS,TO,LIN_OFFSET_BC,ABOUT,ZPLUS
ALIGNMENT/TRANS,XAXIS,CIR_B
ALIGNMENT/TRANS,YAXIS,CIR_B
ALIGNMENT/TRANS,ZAXIS,PLN_A
ALIGNMENT/END
MOVE/CLEARPLANE
CIR1 =FEAT/CONTACT/CIRCLE/DEFAULT,POLAR,IN,LEAST_SQR
THEO/<1.6142,0,0>,<0,0,1>,0.6457
ACTL/<1.6142,0,0>,<0,0,1>,0.6457
TARG/<1.6142,0,0>,<0,0,1>
START ANG=0,END ANG=360
ANGLE VEC=<1,0,0>
DIRECTION=CCW
SHOW FEATURE PARAMETERS=NO
SHOW CONTACT PARAMETERS=NO
DIM DIM_1= 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 1.6142 1.6142 0.0000
Y 0.0000 0.0000 0.0000
DF 0.6457 0.6457 0.0020 0.0020 0.0020 0.0000 0.0000 ----#----
D1 14.0200 14.0200 0.0020 0.0020 0.0020 CIRCLE CIR_B AT MMC
D2 0.2150 0.2150 0.0030 0.0030 0.0030 CIRCLE CIR_C AT MMC
TP 0.0000 MMC 0.0100 0.0020 0.0000 0.0000 #--------
END OF DIMENSION DIM_1


    offset line is a construction from -B- to -C- with an offset of the small leg distance, this rotationally constrains through those datums while keeping your blue print basic dimensions square (notice the vector of the line is straight and it comes from the center of -B- and is offset from the center of -C-). you do this instead of rotating from -B- to -C- & offsetting the 1.5° because if that hypotenuse distance is off even microscopically (and of course it will be because this is the real world) you'll have problems with that alignment using a now geometrically incorrect offset thats gonna mess with your nominals/results .hope this makes sense

  • in reply to DAN_M
    - That was extremely helpful and exactly what I was hoping to get from this post! I will remember this going forward as I'm sure I've approached it incorrectly. Thank you sir!
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