We have a part that has two mounting studs projecting from two surfaces (mouting surfaces). The drawing specs the distance between the holes & the customer wants the distance between the studs at the mounting surface (actually, opposite side of matl of mounting surface).
To do this, we're measuring circles at the top & bottom of the studs, creating a cylinder for each one and then creating a circle at the intersection point of the cylinder & the plane. The cylinder direction is from top towards the intersection point. I tried creating an intersection point instead of circle but PCd wants to put it way off location every time.
Sometimes when the program is run, it runs fine; all circles / cylinders line up properly. Randomly other times, the intersection circle is off location in the Y-axis. This causes a problem because one of the intersection circles is the origin along the X&Y axes. If this is off, the cmm crashes trying to find the other features of the parts.
The pictures show the location of the cylinders & the intersection circles from two consecutive runs of the program; the part was not moved. The only change was that I went back into the program, F9 on the intersection circles, clicked on the plane to remove it from the construction & then clicked back on it and selected OK. This moves the intersection circle back to where it should be.
Obviously, we don't want to have to go into the edit window every time the program is run to edit the intersection circles. Can somebody please advise if this is a glitch or a programming error & how to correct it? Thank you for your assistance.
CIR_4_TOP =FEAT/CONTACT/CIRCLE,CARTESIAN,OUT,LEAST_SQR
THEO/<0+0,0+0,15+0>,<0+0,0+0,1+0>,11.06,0,0,0
ACTL/<-0.038,-0.094,15.013>,<-0.0012805,0.0013257,0.9999983>,11.078,0,0,0
TARG/<0.183,-0.051,15.013>,<-0.0012805,0.0013257,0.9999983>
ANGLE VEC=<1,-0.0000688,0>
DIRECTION=CW
SHOW FEATURE PARAMETERS=YES
REMEASURE=NO
SURFACE=THICKNESS_NONE,0
MEASURE MODE=NOMINALS
RMEAS=NONE,NONE,NONE
AUTO WRIST=NO
CIRCULAR MOVES=YES
CLEARPLANE=NO
GRAPHICAL ANALYSIS=NO
FEATURE LOCATOR=NO,NO,""
SHOW CONTACT PARAMETERS=YES
NUMHITS=8,DEPTH=0,PITCH=0
SAMPLE HITS=0,SPACER=3
AVOIDANCE MOVE=NO,DISTANCE=0
FIND HOLE=DISABLED,ONERROR=NO,READ POS=NO
SHOW HITS=NO
CIR_4_BTM =FEAT/CONTACT/CIRCLE,CARTESIAN,OUT,LEAST_SQR
THEO/<0+0,0+0,3.25+0>,<0+0,0+0,1+0>,11.06,0,45,45
ACTL/<-0.005,-0.013,3.25>,<0,0,1>,11.081,0,45,45
TARG/<0,0,3.25>,<0,0,1>
ANGLE VEC=<1,-0.0000688,0>
DIRECTION=CW
SHOW FEATURE PARAMETERS=YES
REMEASURE=NO
SURFACE=THICKNESS_NONE,0
MEASURE MODE=NOMINALS
RMEAS=NONE,NONE,NONE
AUTO WRIST=NO
CIRCULAR MOVES=YES
CLEARPLANE=NO
GRAPHICAL ANALYSIS=NO
FEATURE LOCATOR=NO,NO,""
SHOW CONTACT PARAMETERS=YES
NUMHITS=6,DEPTH=0,PITCH=0
SAMPLE HITS=0,SPACER=3
AVOIDANCE MOVE=NO,DISTANCE=0
FIND HOLE=DISABLED,ONERROR=NO,READ POS=NO
SHOW HITS=NO
CYL_4 =FEAT/CYLINDER,CARTESIAN,OUT,LEAST_SQR,NO
THEO/<0+0,0+0,8.75+0>,<0+0,0+0,-1+0>,11.057,12.128
ACTL/<-0.022,-0.054,9.135>,<0.0028065,0.0069445,-0.9999719>,11.08,11.849
CONSTR/CYLINDER,BF,CIR_4_TOP,CIR_4_BTM,,
CIR_4_INT =FEAT/CIRCLE,CARTESIAN,OUT,NO
THEO/<0+0,0+0,-1.2+0>,<0+0,0+0,-1+0>,11.057
ACTL/<0.006,0.021,-1.195>,<0.0026757,0.0072054,-0.9999705>,11.076
CONSTR/CIRCLE,INTOF,CYL_4,PLN_DTM_U
PNT_4_INT =FEAT/POINT,CARTESIAN,NO
THEO/<1.654,-21.398,1051.635>,<0,0,-1>
ACTL/<-15.256,-40.362,5800.159>,<0.0028065,0.0069445,-0.9999719>
CONSTR/POINT,INT,CYL_4,PLN_DTM_U
ALN_DWG =ALIGNMENT/START,RECALL:aln_lvl_zplus_3,LIST=YES
ALIGNMENT/LEVEL,ZPLUS,PLN_DTM_U
ALIGNMENT/ROTATE_CIRCLE,YPLUS,TO,CIR_3_INT,AND,CIR_4_INT,ABOUT,ZPLUS
ALIGNMENT/TRANS,XAXIS,CIR_4_INT
ALIGNMENT/TRANS,YAXIS,CIR_4_INT
ALIGNMENT/TRANS,ZAXIS,PLN_DTM_U
ALIGNMENT/END
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