I've used the search function here but cannot seem to find anything related to my issue.
Before I get into the issue I will say I have 0 formal training using PC-DMIS, I've had to ultimately self teach my self how to run this machine based on a previous inspector's programs in the last 18 months, our version is 4.2.
I set up the part on a preexisting fixture and set my manual alignment using DATUMS F A E, this is the most common datum usage on the part.
Then switch to DCC mode to set the Auto Alignment using the same features.
The probe then checks a few features including DATUM H and J, after this I set another alignment at the end of the program to DATUMS H J with a rotation to E for dimensioning purposes, however, when i set the new alignment, all of my features previous to the alignment, shift. Not much, but noticeable.
On the full program this is an issue as the further from the new alignment i get, the farther out it says my dimensions are.
I have confirmed by other means that the dimensions are correct and in tolerance but the CMM is reading them as out.
I am programming this completely using the solid .iges model, all features line up correctly until i run the program through, then everything moves.
Here is the program: (I've had to omit a lot of data to fit the 10000 characters limit. but hopefully there is nothing crucial missing.)
STARTUP =ALIGNMENT/START,RECALL:,LIST=YES
ALIGNMENT/END
MODE/MANUAL
PREHIT/ 0.3
RETRACT/ 0.3
MANRETRACT/2.54
FORMAT/TEXT,OPTIONS, ,HEADINGS,SYMBOLS, ;NOM,TOL,MEAS,DEV,OUTTOL, ,
LOADPROBE/1-5 BY 30MM BALL
TIP/T1A0B0, SHANKIJK=0, 0, 1, ANGLE=0
COMMENT/OPER,NO,TAKE FOUR POINTS ON DATUM F
DATUM F INITIAL=FEAT/PLANE,CARTESIAN,TRIANGLE
THEO/<0.2826,-0.027,-0.125>,<0,0,1>
ACTL/<7.5757,30.5858,-18.8371>,<0.0114563,-0.0041409,0.9999258>
MEAS/PLANE,4
ENDMEAS/
COMMENT/OPER,NO,TAKE THREE POINTS ON LARGE DIAMETER
DATUM E INITIAL=FEAT/CIRCLE,CARTESIAN,IN,LEAST_SQR
THEO/<0,0,-0.2265>,<0,0,1>,3.75
ACTL/<7.3584,30.3527,-18.9719>,<0,0,1>,3.7543
MEAS/CIRCLE,3,WORKPLANE
ENDMEAS/
TIP/T1A75B-90, SHANKIJK=0.9659, 0, 0.2588, ANGLE=-90
WORKPLANE/XPLUS
COMMENT/OPER,NO,TAKE TWO POINTS ON DATUM A
,FRONT TO BACK
PNT1 =FEAT/POINT,CARTESIAN
THEO/<12.0658,29.0039,-18.8758>,<1,0,0>
ACTL/<12.066,28.9702,-18.8849>,<0.9999996,0.0009112,0>
MEAS/POINT,1
HIT/BASIC,NORMAL,<12.0658,29.0039,-18.8758>,<1,0,0>,<12.066,28.9702,-18.8849>,USE THEO = YES
ENDMEAS/
PNT2 =FEAT/POINT,CARTESIAN
THEO/<12.0673,31.5941,-18.8759>,<1,0,0>
ACTL/<12.0675,31.7242,-18.8556>,<1,0,0>
MEAS/POINT,1
HIT/BASIC,NORMAL,<12.0673,31.5941,-18.8759>,<1,0,0>,<12.0675,31.7242,-18.8556>,USE THEO = YES
ENDMEAS/
DATUM A INITIAL=FEAT/LINE,CARTESIAN,UNBOUNDED,NO
THEO/<12.0666,29.0039,-18.8758>,<0,1,-0.0000609>
ACTL/<12.0668,28.9702,-18.8849>,<0,0.9999432,0.0106599>
CONSTR/LINE,BF,2D,PNT1,PNT2,,
OUTLIER_REMOVAL/OFF,3
FILTER/OFF,WAVELENGTH=0
COMMENT/OPER,NO,READY TO RUN DCC
MANUAL ALIGNMENT=ALIGNMENT/START,RECALL:STARTUP,LIST=YES
ALIGNMENT/LEVEL,ZPLUS,DATUM F INITIAL
ALIGNMENT/ROTATE,YPLUS,TO,DATUM A INITIAL,ABOUT,ZPLUS
ALIGNMENT/TRANS,ZAXIS,DATUM F INITIAL
ALIGNMENT/TRANS,XAXIS,DATUM E INITIAL
ALIGNMENT/TRANS,YAXIS,DATUM E INITIAL
ALIGNMENT/END
CLEARP/ZPLUS,0.5,ZPLUS,0.5,ON
MODE/DCC
WORKPLANE/ZPLUS
MOVE/INCREMENT,<0,0,6>
TIP/T1A0B0, SHANKIJK=-0.0115, 0.0041, 0.9999, ANGLE=0.0027
MOVE/INCREMENT,<-6,0,0>
DATUM F =FEAT/PLANE,CARTESIAN,TRIANGLE
THEO/<0.2826,-0.027,0>,<0,0,1>
ACTL/<0.2826,-0.027,0>,<-0.0000021,-0.000018,1>
MEAS/PLANE,4
MOVE/CLEARPLANE
ENDMEAS/
DATUM E =FEAT/CIRCLE,CARTESIAN,IN,LEAST_SQR
THEO/<0,0,-0.1>,<0,0,1>,3.75
ACTL/<-0.0001,0.0003,-0.0998>,<0,0,1>,3.7548
MEAS/CIRCLE,8,WORKPLANE
MOVE/CLEARPLANE
ENDMEAS/
MOVE/INCREMENT,<0,0,6>
MOVE/INCREMENT,<10,0,0>
WORKPLANE/XPLUS
CLEARP/XPLUS,6,XPLUS,6,ON
TIP/T1A75B-90, SHANKIJK=0.9629, 0.0011, 0.2699, ANGLE=-90.2261
DATUM A-1 =FEAT/POINT,CARTESIAN
THEO/<4.71,-1.236,0>,<1,0,0>
ACTL/<4.7058,-1.2359,0.0002>,<1,0,0>
MEAS/POINT,1
MOVE/CLEARPLANE
HIT/BASIC,NORMAL,<4.71,-1.236,0>,<1,0,0>,<4.7058,-1.2359,0.0002>,USE THEO = YES
ENDMEAS/
DATUM A-2 =FEAT/POINT,CARTESIAN
THEO/<4.71,1.236,0>,<1,0,0>
ACTL/<4.7074,1.2361,0.0002>,<1,0,0>
MEAS/POINT,1
MOVE/CLEARPLANE
HIT/BASIC,NORMAL,<4.71,1.236,0>,<1,0,0>,<4.7074,1.2361,0.0002>,USE THEO = YES
ENDMEAS/
DATUM A =FEAT/LINE,CARTESIAN,UNBOUNDED,NO
THEO/<4.71,-1.236,0>,<0,1,0>
ACTL/<4.7066,-1.2359,0.0002>,<0,1,0.0000148>
CONSTR/LINE,BF,2D,DATUM A-1,DATUM A-2,,
OUTLIER_REMOVAL/OFF,3
FILTER/OFF,WAVELENGTH=0
AUTO ALIGNMENT=ALIGNMENT/START,RECALL:MANUAL ALIGNMENT,LIST=YES
ALIGNMENT/LEVEL,ZPLUS,DATUM F
ALIGNMENT/ROTATE,YPLUS,TO,DATUM A,ABOUT,ZPLUS
ALIGNMENT/TRANS,ZAXIS,DATUM F
ALIGNMENT/TRANS,XAXIS,DATUM E
ALIGNMENT/TRANS,YAXIS,DATUM E
ALIGNMENT/END
CLEARP/ZPLUS,0.5,ZPLUS,0.5,ON
RETRACT/ 0.2
PREHIT/ 0.2
MOVE/INCREMENT,<0.5,0,7>
TIP/T1A0B0, SHANKIJK=-0.0115, 0.0041, 0.9999, ANGLE=0.0028
WORKPLANE/ZPLUS
MOVE/INCREMENT,<-5,0,0>
DATUM J =FEAT/CIRCLE,CARTESIAN,IN,LEAST_SQR
THEO/<3.38,-1.81,-0.063>,<0,0,1>,1.13
ACTL/<3.3778,-1.8192,-0.0628>,<0,0,1>,1.1299
MEAS/CIRCLE,12,WORKPLANE
MOVE/CLEARPLANE
HIT/BASIC,NORMAL,<3.945,-1.81,-0.063>,<-1,0,0>,<3.9421,-1.8094,-0.0628>,USE THEO = YES
HIT/BASIC,NORMAL,<3.8693,-1.5275,-0.063>,<-0.8660254,-0.5,0>,<3.8621,-1.5312,-0.0627>,USE THEO = YES
HIT/BASIC,NORMAL,<3.6625,-1.3207,-0.063>,<-0.5,-0.8660254,0>,<3.6584,-1.3274,-0.0623>,USE THEO = YES
HIT/BASIC,NORMAL,<3.38,-1.245,-0.063>,<0,-1,0>,<3.38,-1.2528,-0.0628>,USE THEO = YES
HIT/BASIC,NORMAL,<3.0975,-1.3207,-0.063>,<0.5,-0.8660254,0>,<3.1016,-1.327,-0.0628>,USE THEO = YES
HIT/BASIC,NORMAL,<2.8907,-1.5275,-0.063>,<0.8660254,-0.5,0>,<2.8937,-1.5289,-0.0629>,USE THEO = YES
HIT/BASIC,NORMAL,<2.815,-1.81,-0.063>,<1,0,0>,<2.8135,-1.8096,-0.0629>,USE THEO = YES
HIT/BASIC,NORMAL,<2.8907,-2.0925,-0.063>,<0.8660254,0.5,0>,<2.8855,-2.0951,-0.0631>,USE THEO = YES
HIT/BASIC,NORMAL,<3.0975,-2.2993,-0.063>,<0.5,0.8660254,0>,<3.0923,-2.3078,-0.0633>,USE THEO = YES
HIT/BASIC,NORMAL,<3.38,-2.375,-0.063>,<0,1,0>,<3.3801,-2.3847,-0.0628>,USE THEO = YES
HIT/BASIC,NORMAL,<3.6625,-2.2993,-0.063>,<-0.5,0.8660254,0>,<3.6661,-2.3049,-0.0628>,USE THEO = YES
HIT/BASIC,NORMAL,<3.8693,-2.0925,-0.063>,<-0.8660254,0.5,0>,<3.8718,-2.0933,-0.0628>,USE THEO = YES
ENDMEAS/
DATUM H =FEAT/PLANE,CARTESIAN,TRIANGLE
THEO/<3.3664,-1.7805,-0.063>,<0,0,1>
ACTL/<3.3665,-1.7806,-0.0606>,<-0.0014467,-0.0001116,0.9999989>
MEAS/PLANE,3
MOVE/CLEARPLANE
HIT/BASIC,NORMAL,<4.0006,-1.7632,-0.063>,<0,0,1>,<4.0007,-1.7632,-0.0596>,USE THEO = YES
HIT/BASIC,NORMAL,<3.0635,-1.2104,-0.063>,<0,0,1>,<3.0635,-1.2104,-0.0609>,USE THEO = YES
HIT/BASIC,NORMAL,<3.0353,-2.368,-0.063>,<0,0,1>,<3.0353,-2.3681,-0.0611>,USE THEO = YES
ENDMEAS/
MOVE/INCREMENT,<0,2,0>
MOVE/INCREMENT,<5,0,5>
CLEARP/XPLUS,6,XPLUS,6,ON
TIP/T1A75B-45, SHANKIJK=0.6801, 0.684, 0.2638, ANGLE=-75.7966
WORKPLANE/XPLUS
A1 =ALIGNMENT/START,RECALL:AUTO ALIGNMENT,LIST=YES
ALIGNMENT/LEVEL,ZPLUS,DATUM H
ALIGNMENT/ROTATE,YPLUS,TO,DATUM A,ABOUT,ZPLUS
ALIGNMENT/TRANS,ZAXIS,DATUM H
ALIGNMENT/TRANS,XAXIS,DATUM J
ALIGNMENT/TRANS,YAXIS,DATUM J
ALIGNMENT/END
On the photo's you can see in the large bore, the circle feature outline, moves into the wall on the Y+ end.
Any help would be greatly appreciated
Thanks,
Eric
