Legacy dimension - profile of a surface

First of all, I am aware this topic has been covered, but my google-fu failed to find a solution for my current conundrum.

All that follows is relative to PC-DMIS 2012

Part setup:
Datum A: Cylinder along Z, locking X, Y and two rotational DoF
Datum B: Plane perpendicular to A, locking Z
Datum C: Plane perpendicular to B at 5.5 basic from A's axis, locking the last rotational DoF

Callout:
Profile of a surface of datum C relative to datum A

The issue:
While this is pretty straightforward to do with exact dimensions, the report template at my current workplace plays nicely only with legacy dimensions.
The result of legacy profile of a surface (form and position, LSQ best fit) while aligned to ABC are different (worse) than exact above.
To my understanding this is to be expected as legacy "form and location" fits to the current alignment, which is restricting 6 DoF instead of just 4 as Datum A alone would.
If this is the case, is there any way to use legacy with the callout that I have?

Parents

Neil Challinor over 4 years ago

MBaroni can you either share your program or post your code? It should look something like this...

CYL1 =FEAT/CONTACT/CYLINDER/DEFAULT,CARTESIAN,IN,LEAST_SQR
THEO/<4.8819,1.9685,0>,<0,0,1>,2.3819,0.5906
ACTL/<4.8819,1.9685,0>,<0,0,1>,2.3819,0.5906
TARG/<4.8819,1.9685,0>,<0,0,1>
START ANG=0,END ANG=360
ANGLE VEC=<1,0,0>
DIRECTION=CCW
SHOW FEATURE PARAMETERS=NO
SHOW CONTACT PARAMETERS=YES
NUMHITS=3,NUMLEVELS=3,DEPTH=0,END OFFSET=0,PITCH=0
SAMPLE METHOD=SAMPLE_HITS
SAMPLE HITS=0,SPACER=0
AVOIDANCE MOVE=BOTH,DISTANCE=0.3937
FIND HOLE=DISABLED,ONERROR=NO,READ POS=NO
SHOW HITS=NO
PLN1 =FEAT/CONTACT/PLANE/DEFAULT,CARTESIAN,OUTLINE,LEAST_SQR
THEO/<5.4747,0.5272,-20>,<0.9953962,0.0958458,0>
ACTL/<5.4747,0.5272,-20>,<0.9953962,0.0958458,0>
TARG/<5.4747,0.5272,-20>,<0.9953962,0.0958458,0>
ANGLE VEC=<0.9953962,0.0958458,0>,SQUARE
SHOW FEATURE PARAMETERS=NO
SHOW CONTACT PARAMETERS=YES
NUMHITS=3,NUMROWS=3
SPACER=1
AVOIDANCE MOVE=BOTH,DISTANCE=0.3937
SHOW HITS=NO
A1 =ALIGNMENT/START,RECALL:STARTUP,LIST=YES
ALIGNMENT/LEVEL,ZPLUS,CYL1
ALIGNMENT/TRANS,XAXIS,CYL1
ALIGNMENT/TRANS,YAXIS,CYL1
ALIGNMENT/BF2D,ZPLUS,VECTOR_MIN_MAX,CREATE WEIGHTS=NO,ROTONLY,0,0,0,0
ITERATEANDREPIERCECAD=NO
Deviation Threshold=0.0003937
SHOWALLINPUTS=NO,SHOWALLPARAMS=NO
ALIGNMENT/END
DIM PROF1= PROFILE OF SURFACE OF PLANE PLN1 FORMANDLOCATION UNITS=IN ,$
GRAPH=OFF TEXT=OFF MULT=10.00 ARROWDENSITY=100 OUTPUT=BOTH
AX NOMINAL +TOL -TOL MEAS DEV OUTTOL
M 0.0000 0.0005 0.0005 0.0000 0.0000 0.0000 ----|----
DATDEF/FEATURE=CYL1,A
FCFPROF1 =SURFACE PROFILE : PLN1
FEATCTRLFRAME/SHOWPARAMS=YES,SHOWEXPANDED=YES
CADGRAPH=OFF,REPORTGRAPH=OFF,TEXT=OFF,MULT=10.00,A RROWDENSITY=100,OUTPUT=BOTH,UNITS=IN
COMPOSITE=NO,
CUSTOMIZED DRF=NO
STANDARDTYPE=ASME_Y14_5
PRIMARY DIMENSION/PROFILE OF SURFACE,0.001,<UZ>,<UTol>,A,<dat>,<dat>
NOTE/FCFPROF1
FEATURES/PLN1,,

Reply

Neil Challinor over 4 years ago

MBaroni can you either share your program or post your code? It should look something like this...

CYL1 =FEAT/CONTACT/CYLINDER/DEFAULT,CARTESIAN,IN,LEAST_SQR
THEO/<4.8819,1.9685,0>,<0,0,1>,2.3819,0.5906
ACTL/<4.8819,1.9685,0>,<0,0,1>,2.3819,0.5906
TARG/<4.8819,1.9685,0>,<0,0,1>
START ANG=0,END ANG=360
ANGLE VEC=<1,0,0>
DIRECTION=CCW
SHOW FEATURE PARAMETERS=NO
SHOW CONTACT PARAMETERS=YES
NUMHITS=3,NUMLEVELS=3,DEPTH=0,END OFFSET=0,PITCH=0
SAMPLE METHOD=SAMPLE_HITS
SAMPLE HITS=0,SPACER=0
AVOIDANCE MOVE=BOTH,DISTANCE=0.3937
FIND HOLE=DISABLED,ONERROR=NO,READ POS=NO
SHOW HITS=NO
PLN1 =FEAT/CONTACT/PLANE/DEFAULT,CARTESIAN,OUTLINE,LEAST_SQR
THEO/<5.4747,0.5272,-20>,<0.9953962,0.0958458,0>
ACTL/<5.4747,0.5272,-20>,<0.9953962,0.0958458,0>
TARG/<5.4747,0.5272,-20>,<0.9953962,0.0958458,0>
ANGLE VEC=<0.9953962,0.0958458,0>,SQUARE
SHOW FEATURE PARAMETERS=NO
SHOW CONTACT PARAMETERS=YES
NUMHITS=3,NUMROWS=3
SPACER=1
AVOIDANCE MOVE=BOTH,DISTANCE=0.3937
SHOW HITS=NO
A1 =ALIGNMENT/START,RECALL:STARTUP,LIST=YES
ALIGNMENT/LEVEL,ZPLUS,CYL1
ALIGNMENT/TRANS,XAXIS,CYL1
ALIGNMENT/TRANS,YAXIS,CYL1
ALIGNMENT/BF2D,ZPLUS,VECTOR_MIN_MAX,CREATE WEIGHTS=NO,ROTONLY,0,0,0,0
ITERATEANDREPIERCECAD=NO
Deviation Threshold=0.0003937
SHOWALLINPUTS=NO,SHOWALLPARAMS=NO
ALIGNMENT/END
DIM PROF1= PROFILE OF SURFACE OF PLANE PLN1 FORMANDLOCATION UNITS=IN ,$
GRAPH=OFF TEXT=OFF MULT=10.00 ARROWDENSITY=100 OUTPUT=BOTH
AX NOMINAL +TOL -TOL MEAS DEV OUTTOL
M 0.0000 0.0005 0.0005 0.0000 0.0000 0.0000 ----|----
DATDEF/FEATURE=CYL1,A
FCFPROF1 =SURFACE PROFILE : PLN1
FEATCTRLFRAME/SHOWPARAMS=YES,SHOWEXPANDED=YES
CADGRAPH=OFF,REPORTGRAPH=OFF,TEXT=OFF,MULT=10.00,A RROWDENSITY=100,OUTPUT=BOTH,UNITS=IN
COMPOSITE=NO,
CUSTOMIZED DRF=NO
STANDARDTYPE=ASME_Y14_5
PRIMARY DIMENSION/PROFILE OF SURFACE,0.001,<UZ>,<UTol>,A,<dat>,<dat>
NOTE/FCFPROF1
FEATURES/PLN1,,

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