Rmeas help

I've been trying to figure out what PC-DMIS does with the RMEAS statement with the different numbers of Hits. I found some info that refers to the Rmeas with 3 hits as the "Flush/Gap" measurement. Can anyone explain the difference between the RMEAS with 1 hit versus the RMEAS with 3 hits? From analyzing the data I believe it has to do with the vector that is used when it takes the actual measurement. From what I've seen looking at data is the single hit RMEAS would be considered a "Surface/Edge" measurement where the edge is too thin to consider it having any thickness/depth.

From my own analysis it appears that the single hit version uses an approach vector that is perpendicular to the reference points vector. The vector I believe is derived by the unit vector of (|V1| X |V2|) X |V1|, where V1 is the vector on the surface point and V2 is the vector on the point being measured with RMEAS. The X represents the Cross Product function. The first cross product is done between the 2 vectors to obtain a vector normal to the 2 vectors. The cross product of the resulting vector & the surface vector then gives you a vector that is perpendicular to the surface vector V1, but in the same plane as V2.

Does anyone know what the 3 hit version does?

F(F0954M009B) = FEAT/POINT,CART,2531.99,860.834,605.15,0.0437,0.9651,0.2584
  MEAS/POINT, F(F0954M009B), 1
  ENDMES
 T(XTOL_4)=TOL/CORTOL,XAXIS,0.0,0.0
 T(YTOL_4)=TOL/CORTOL,YAXIS,-0.15,0.15
 T(ZTOL_4)=TOL/CORTOL,ZAXIS,0.0,0.0
 T(VECTOL_4)=TOL/PROFP,0.0,0.0
 TEXT/OUTFIL,'F0954M009B - POINT - INSP=D METAL=0.686'
 OUTPUT/FA(F0954M009B),TA(XTOL_4),TA(YTOL_4),TA(ZTOL_4),TA(VECTOL_4)

  GOTO/2536.032,864.531,605.704
F(G0954M009B) = FEAT/POINT,CART,2524.03,857.084,605.007,0.9667,-0.2002,-0.1595
  RMEAS/POINT, F(G0954M009B), 1, FA(F0954M009B)
  ENDMES
 T(XTOL_5)=TOL/CORTOL,XAXIS,-0.15,0.15
 T(YTOL_5)=TOL/CORTOL,YAXIS,0.0,0.0
 T(ZTOL_5)=TOL/CORTOL,ZAXIS,0.0,0.0
 T(VECTOL_5)=TOL/PROFP,0.0,0.0
 TEXT/OUTFIL,'G0954M009B - HEDGE - INSP=D METAL=0.686'
 OUTPUT/FA(G0954M009B),TA(XTOL_5),TA(YTOL_5),TA(ZTOL_5),TA(VECTOL_5)
  GOTO/2536.032,864.531,605.704

Parents

mjdevries over 11 years ago

            comment/rept,f7589a140 - point - insp=om metal=0.711 type=10 pn=68037589aa f panel - body side otr lt
f7589a140  =auto/vector point, showallparams=yes
            theo/5150.242,-816.214,1075.426,0.5676822,-0.7946932,0.2149411
            actl/5150.042,-816.222,1075.467,0.5676321,-0.794711,0.2150074
            targ/5150.242,-816.214,1075.426,0.5676822,-0.7946932,0.2149411
              theo_thickness = 0.711, rect, snap = no ,$
              auto move = yes, distance = 25
dim d_f7589a140= location of point f7589a140
ax  nominal    meas     +tol     -tol      dev  
x  5150.242 5150.042    1.200    1.200   -0.200
y  -816.214 -816.222    1.200    1.200   -0.008
z  1075.426 1075.467    1.200    1.200    0.041
t     0.000   -0.099    1.200    1.200   -0.099
v     0.568   -0.795    0.215
end of dimension d_f7589a140
            comment/rept,g7589a140 - hedge - insp=om metal=0.711 type=32 pn=68037589aa f panel - body side otr lt 


g7589a140  =auto/edge point, showallparams=yes
            theo/5153.436,-809.589,1076.956,0.9207243,-0.0697596,0.3839276
            actl/5152.725,-808.78,1076.8,0.9207259,-0.0697852,0.3839191
            targ/5153.436,-809.589,1076.956,0.9207243,-0.0697596,0.3839276
              theo_thickness = 0, rect, edge theo_thickness = 0.711, onerror = no ,$
              auto move = yes, distance = 25, rmeas = f7589a140, measure order = surface ,$
              surface normal = 0.5676822,-0.7946932,0.2149411 ,$
              init = 0, perm = 0, spacer = 0, indent = 6.298, depth = 0
dim d_g7589a140= location of point g7589a140
ax  nominal    meas     +tol     -tol      dev  
x  5153.436 5152.725    1.200    1.200   -0.711
y  -809.589 -808.780    1.200    1.200    0.809
z  1076.956 1076.800    1.200    1.200   -0.156
t     0.000   -0.771    1.200    1.200   -0.771
v     0.921   -0.070    0.384
end of dimension d_g7589a140

Reply

mjdevries over 11 years ago

            comment/rept,f7589a140 - point - insp=om metal=0.711 type=10 pn=68037589aa f panel - body side otr lt
f7589a140  =auto/vector point, showallparams=yes
            theo/5150.242,-816.214,1075.426,0.5676822,-0.7946932,0.2149411
            actl/5150.042,-816.222,1075.467,0.5676321,-0.794711,0.2150074
            targ/5150.242,-816.214,1075.426,0.5676822,-0.7946932,0.2149411
              theo_thickness = 0.711, rect, snap = no ,$
              auto move = yes, distance = 25
dim d_f7589a140= location of point f7589a140
ax  nominal    meas     +tol     -tol      dev  
x  5150.242 5150.042    1.200    1.200   -0.200
y  -816.214 -816.222    1.200    1.200   -0.008
z  1075.426 1075.467    1.200    1.200    0.041
t     0.000   -0.099    1.200    1.200   -0.099
v     0.568   -0.795    0.215
end of dimension d_f7589a140
            comment/rept,g7589a140 - hedge - insp=om metal=0.711 type=32 pn=68037589aa f panel - body side otr lt 


g7589a140  =auto/edge point, showallparams=yes
            theo/5153.436,-809.589,1076.956,0.9207243,-0.0697596,0.3839276
            actl/5152.725,-808.78,1076.8,0.9207259,-0.0697852,0.3839191
            targ/5153.436,-809.589,1076.956,0.9207243,-0.0697596,0.3839276
              theo_thickness = 0, rect, edge theo_thickness = 0.711, onerror = no ,$
              auto move = yes, distance = 25, rmeas = f7589a140, measure order = surface ,$
              surface normal = 0.5676822,-0.7946932,0.2149411 ,$
              init = 0, perm = 0, spacer = 0, indent = 6.298, depth = 0
dim d_g7589a140= location of point g7589a140
ax  nominal    meas     +tol     -tol      dev  
x  5153.436 5152.725    1.200    1.200   -0.711
y  -809.589 -808.780    1.200    1.200    0.809
z  1076.956 1076.800    1.200    1.200   -0.156
t     0.000   -0.771    1.200    1.200   -0.771
v     0.921   -0.070    0.384
end of dimension d_g7589a140

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