I am working on a program that takes 2 circles and two planes with 1,440 points. I have constructed the planes and circles from the points to find the runouts of these features. Is there a halfway decent way to find the low point of these features or the location of the max and min of the circle. Essentially I want to find the place on the part where the circle's diameter is the closest to the center of the part. I tested a couple ways, but with this many points I am not sure if there is an efficient way to approach this.
Finding the Low point of a circle
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Change your circles from Cartesian to Polar.
Then, you can use a maxindex and minindex command for each circle to extract the max and the min.
Code:ASSIGN/MAX_PR_1=MAXINDEX(ARRAY(CIR1.HIT[1..CIR1.NUMHITS).PR)) ASSIGN/MIN_PR_1=MININDEX(ARRAY(CIR1.HIT[1..CIR1.NUMHITS).PR)) ASSIGN/MAX_PR_2=MAXINDEX(ARRAY(CIR2.HIT[1..CIR2.NUMHITS).PR)) ASSIGN/MIN_PR_2=MININDEX(ARRAY(CIR2.HIT[1..CIR2.NUMHITS).PR))
Code:MAX_PT_1 =GENERIC/POINT,DEPENDENT,POLAR NOM/XYZ,<CIR1.HIT[MAX_PR_1].TPR, CIR1.HIT[MAX_PR_1].TPA, CIR1.HIT[MAX_PR_1].TZ> MEAS/XYZ,<CIR1.HIT[MAX_PR_1].PR, CIR1.HIT[MAX_PR_1].PA, CIR1.HIT[MAX_PR_1].Z> NOM/IJK,<CIR1.HIT[MAX_PR_1].TI,<CIR1.HIT[MAX_PR_1].TJ,<CIR1.HIT[MAX_PR_1].TK> MEAS/IJK,<CIR1.HIT[MAX_PR_1].I,<CIR1.HIT[MAX_PR_1].J,<CIR1.HIT[MAX_PR_1].K>
Output your locations PR and PA for each point.
you have been forewarned, this WILL extract outliers as valid hits. so make sure you have zero oil, dirt FOD Debris on your sample parts and probe tip.
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Another way:
Code:TMP_XY =FEAT/CONTACT/CIRCLE/DEFAULT,CARTESIAN,IN,LEAST_SQR THEO/<0,0,0>,<0,0,1>,1.5 ACTL/<0,0,0>,<0,0,1>,1.5 TARG/<0,0,0>,<0,0,1> START ANG=0,END ANG=360 ANGLE VEC=<0,1,0> DIRECTION=CCW SHOW FEATURE PARAMETERS=NO SHOW CONTACT PARAMETERS=YES NUMHITS=3,DEPTH=1,PITCH=0 SAMPLE METHOD=SAMPLE_HITS SAMPLE HITS=0,SPACER=1 AVOIDANCE MOVE=BOTH,DISTANCE=3 FIND HOLE=CENTER,ONERROR=NO,READ POS=NO SHOW HITS=NO A2 =ALIGNMENT/START,RECALL:A1,LIST=YES ALIGNMENT/TRANS,XAXIS,TMP_XY ALIGNMENT/TRANS,YAXIS,TMP_XY ALIGNMENT/END ASSIGN/MIN_R=999 ASSIGN/MAX_R=999 V1 =LOOP/START,ID=YES,NUMBER=TMP_XY.NUMHITS,START=1,SKIP=, OFFSET:XAXIS=0,YAXIS=0,ZAXIS=0,ANGLE=0 ASSIGN/PNT_R=SQRT(TMP_XY.X^2+TMP_XY.Y^2) ASSIGN/MIN_R=IF(PNT_R<MIN_R,PNT_R,MIN_R) ASSIGN/MAX_R=IF(PNT_R>MAX_R,PNT_R,MAX_R) LOOP/END
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louisd , Thx for the info about PR !!!!!
I would say that, if you construct a filtered circle from hits of the measured circles, it doesn't use outliers.
As I didn't know that PR was available in polar only, I usually do it :
ASSIGN/POLAR_RAD=SQRT(DOT(CIRC1.HIT[1..CIRC1.NUMHITS].XYZCIR1.XYZ,CIRC1.HIT[1..CIRC1.NUMHITS].XYZCIR1.XYZ))
Then
ASSIGN/V1=MAXINDEX(POLAR_RAD)
ASSIGN/V2=MININDEX(POLAR_RAD)
ASSIGN/RMAX=CIRC1.HIT[V1].XYZ
ASSIGN/RMIN=CIRC1.HIT[V2].XYZ
and use RMAX.X, .Y and .Z in a generic feature.
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