PR 260226 flatness of a surface is greater than the Profile to my datums, whi

huangyhg

flatness of a surface is greater than the Profile to my datums, which seems to me should be impossible
<< Don Turcotte  --  03/04/09  13:38:19>>
From Michael Holcumbrink [mailto:m-holcumbrink@raytheon.com]
via Mike Wilson:
"I have an example here where PCDIMS is telling me that the flatness of a surface is greater than the Profile to my datums, which seems to me should be impossible.  Can you afford me an explanation as to how PCDMIS came to this conclusion?  Or whether I have done something wrong?
"
<<END>>


<< Changes made by Don Turcotte -- 03/16/09  13:31:09>>
Status:  RESOLVED to CLOSED
<<END>>
<< Don Turcotte  --  03/04/09  15:04:47>>
Profile is calculated as the deviation of each measure point from the corresponding nominal point in the direction of the nominal vector.  This is equivalent to the location dimension T axis.  If you do a location dimension on each of the points used in the profile and report the T axis, you will see that the max T deviation is 0.01665 and the min T deviation is -0.00772 which is a total profile deviation of 0.02437 as reported by the profile dimension.
DIM PROF1= PROFILE OF SURFACE OF SET SCN1    FORMANDLOCATION  UNITS=IN ,$
GRAPH=OFF  TEXT=ON  MULT=100.00  OUTPUT=BOTH
AX        DEV     OUTTOL        MAX        MIN
M     0.02437    0.00000    0.01665   -0.00772 -----#--|-------#-
DIM LOC26= LOCATION OF POINT PNT_1  UNITS=IN ,$
GRAPH=OFF  TEXT=OFF  MULT=10.00  OUTPUT=BOTH
AX        DEV     OUTTOL
T     0.00079    0.00000 --------------#---
END OF DIMENSION LOC26
DIM LOC27= LOCATION OF POINT PNT_2  UNITS=IN ,$
GRAPH=OFF  TEXT=OFF  MULT=10.00  OUTPUT=BOTH
AX        DEV     OUTTOL
T     0.00284    0.00158 ----------------->
END OF DIMENSION LOC27
DIM LOC28= LOCATION OF POINT PNT_3  UNITS=IN ,$
GRAPH=OFF  TEXT=OFF  MULT=10.00  OUTPUT=BOTH
AX        DEV     OUTTOL
T     0.00862    0.00735 ----------------->
END OF DIMENSION LOC28
DIM LOC29= LOCATION OF POINT PNT_4  UNITS=IN ,$
GRAPH=OFF  TEXT=OFF  MULT=10.00  OUTPUT=BOTH
AX        DEV     OUTTOL
T     0.01624    0.01497 ----------------->
END OF DIMENSION LOC29
DIM LOC30= LOCATION OF POINT PNT_5  UNITS=IN ,$
GRAPH=OFF  TEXT=OFF  MULT=10.00  OUTPUT=BOTH
AX        DEV     OUTTOL
T     0.01408    0.01281 ----------------->
END OF DIMENSION LOC30
DIM LOC31= LOCATION OF POINT PNT_6  UNITS=IN ,$
GRAPH=OFF  TEXT=OFF  MULT=10.00  OUTPUT=BOTH
AX        DEV     OUTTOL
T     0.00646    0.00520 ----------------->
END OF DIMENSION LOC31
DIM LOC32= LOCATION OF POINT PNT_7  UNITS=IN ,$
GRAPH=OFF  TEXT=OFF  MULT=10.00  OUTPUT=BOTH
AX        DEV     OUTTOL
T    -0.00458    0.00331 <-----------------
END OF DIMENSION LOC32
DIM LOC33= LOCATION OF POINT PNT_8  UNITS=IN ,$
GRAPH=OFF  TEXT=OFF  MULT=10.00  OUTPUT=BOTH
AX        DEV     OUTTOL
T    -0.00772    0.00645 <-----------------            <<<<<<<<<<<<<<<<<<<<