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I have a part that has -a- datum(dia.) on 1 end and -b- datum on the other end they are 2 different sizes. The 2 of them together create datum a-b. How can you create both datums together to use in exact meas. as a-b.
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define your A and B datums then from the drop down in xact, select A then type a hyphen then B.
Will look something like this when you do it.
FCF_A-B.JPGWhatever a man sows, he shall reap. -
Just got it figured out. ThanksComment
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I have a lot of parts like that. Below is an alignment I did yesterday. Figured you might like it since it fits your scenario.
I used a 3D line through the diameters I created so i know I'm getting the whole axis that I physically probed as opposed to using cylinders (centroid-centroid)
Capture.PNGCode:CLEARP/ZPLUS,PLN_TOP.Z+0.25,ZPLUS,PLN_TOP.Z+0.25,ON MOVE/POINT,NORMAL,<0,0,PLN_TOP.Z+1> TIP/T1A-95B0, SHANKIJK=0, -0.9962, -0.0872, ANGLE=0 CLEARP/YMINUS,-1.75,ZMINUS,-3.4,ON MOVE/POINT,NORMAL,<0,-1.75,1> MOVE/CLEARPLANE RAD_G_1 =FEAT/CONTACT/CIRCLE/DEFAULT,CARTESIAN,OUT,LEAST_SQR THEO/<0,0,-3.4>,<0,0,1>,2.4027,0 ACTL/<0,0,-3.4>,<0,0,1>,2.4027,0 TARG/<0,0,-3.4>,<0,0,1> START ANG=182.5,END ANG=-2.5 ANGLE VEC=<1,0,0> DIRECTION=CCW SHOW FEATURE PARAMETERS=NO SHOW CONTACT PARAMETERS=NO RAD_G_2 =FEAT/CONTACT/CIRCLE/DEFAULT,CARTESIAN,OUT,LEAST_SQR THEO/<0,0,-4.075>,<0,0,1>,2.4027,0 ACTL/<0,0,-4.075>,<0,0,1>,2.4027,0 TARG/<0,0,-4.075>,<0,0,1> START ANG=-2.5,END ANG=182.5 ANGLE VEC=<1,0,0> DIRECTION=CW SHOW FEATURE PARAMETERS=NO SHOW CONTACT PARAMETERS=NO RAD_G_3 =FEAT/CONTACT/CIRCLE/DEFAULT,CARTESIAN,OUT,LEAST_SQR THEO/<0,0,-4.75>,<0,0,1>,2.4027,0 ACTL/<0,0,-4.75>,<0,0,1>,2.4027,0 TARG/<0,0,-4.75>,<0,0,1> START ANG=182.5,END ANG=-2.5 ANGLE VEC=<1,0,0> DIRECTION=CCW SHOW FEATURE PARAMETERS=NO SHOW CONTACT PARAMETERS=NO MOVE/INCREMENT,<0.25,0,0> RAD_H_1 =FEAT/CONTACT/CIRCLE/DEFAULT,CARTESIAN,OUT,LEAST_SQR THEO/<0,0,-7.45>,<0,0,1>,2.3781,0 ACTL/<0,0,-7.45>,<0,0,1>,2.3781,0 TARG/<0,0,-7.45>,<0,0,1> START ANG=-2.5,END ANG=182.5 ANGLE VEC=<1,0,0> DIRECTION=CW SHOW FEATURE PARAMETERS=NO SHOW CONTACT PARAMETERS=NO RAD_H_2 =FEAT/CONTACT/CIRCLE/DEFAULT,CARTESIAN,OUT,LEAST_SQR THEO/<0,0,-7.66>,<0,0,1>,2.3781,0 ACTL/<0,0,-7.66>,<0,0,1>,2.3781,0 TARG/<0,0,-7.66>,<0,0,1> START ANG=182.5,END ANG=-2.5 ANGLE VEC=<1,0,0> DIRECTION=CCW SHOW FEATURE PARAMETERS=NO SHOW CONTACT PARAMETERS=NO MOVE/POINT,NORMAL,<1.425,-0.55,-7.66> MOVE/POINT,NORMAL,<1.425,-0.55,2> TIP/T1A-95B180, SHANKIJK=0, 0.9962, -0.0872, ANGLE=0 CLEARP/YPLUS,1.75,ZMINUS,-3.4,ON MOVE/POINT,NORMAL,<0,1.75,1> MOVE/CLEARPLANE RAD_G_4 =FEAT/CONTACT/CIRCLE/DEFAULT,CARTESIAN,OUT,LEAST_SQR THEO/<0,0,-3.4>,<0,0,1>,2.4027,0 ACTL/<0,0,-3.4>,<0,0,1>,2.4027,0 TARG/<0,0,-3.4>,<0,0,1> START ANG=177.5,END ANG=362.5 ANGLE VEC=<1,0,0> DIRECTION=CW SHOW FEATURE PARAMETERS=NO SHOW CONTACT PARAMETERS=NO RAD_G_5 =FEAT/CONTACT/CIRCLE/DEFAULT,CARTESIAN,OUT,LEAST_SQR THEO/<0,0,-4.075>,<0,0,1>,2.4027,0 ACTL/<0,0,-4.075>,<0,0,1>,2.4027,0 TARG/<0,0,-4.075>,<0,0,1> START ANG=2.5,END ANG=-182.5 ANGLE VEC=<1,0,0> DIRECTION=CCW SHOW FEATURE PARAMETERS=NO SHOW CONTACT PARAMETERS=NO RAD_G_6 =FEAT/CONTACT/CIRCLE/DEFAULT,CARTESIAN,OUT,LEAST_SQR THEO/<0,0,-4.75>,<0,0,1>,2.4027,0 ACTL/<0,0,-4.75>,<0,0,1>,2.4027,0 TARG/<0,0,-4.75>,<0,0,1> START ANG=177.5,END ANG=362.5 ANGLE VEC=<1,0,0> DIRECTION=CW SHOW FEATURE PARAMETERS=NO SHOW CONTACT PARAMETERS=NO MOVE/INCREMENT,<0.25,0,0> RAD_H_3 =FEAT/CONTACT/CIRCLE/DEFAULT,CARTESIAN,OUT,LEAST_SQR THEO/<0,0,-7.45>,<0,0,1>,2.3781,0 ACTL/<0,0,-7.45>,<0,0,1>,2.3781,0 TARG/<0,0,-7.45>,<0,0,1> START ANG=2.5,END ANG=-182.5 ANGLE VEC=<1,0,0> DIRECTION=CCW SHOW FEATURE PARAMETERS=NO SHOW CONTACT PARAMETERS=NO RAD_H_4 =FEAT/CONTACT/CIRCLE/DEFAULT,CARTESIAN,OUT,LEAST_SQR THEO/<0,0,-7.66>,<0,0,1>,2.3781,0 ACTL/<0,0,-7.66>,<0,0,1>,2.3781,0 TARG/<0,0,-7.66>,<0,0,1> START ANG=177.5,END ANG=362.5 ANGLE VEC=<1,0,0> DIRECTION=CW SHOW FEATURE PARAMETERS=NO SHOW CONTACT PARAMETERS=NO SCN1 =FEAT/SET,CARTESIAN THEO/<0,0,-3.4>,<0,0,1> ACTL/<0,0,-3.4>,<0,0,1> CONSTR/SET,BASIC,RAD_G_1.HIT[1..5],RAD_G_4.HIT[1..5],, CIR_G1 =FEAT/CIRCLE,CARTESIAN,OUT,LEAST_SQR,NO THEO/<0,0,-3.4>,<0,0,1>,2.4027 ACTL/<0,0,-3.4>,<0,0,1>,2.4027 CONSTR/CIRCLE,BF,2D,SCN1,, OUTLIER_REMOVAL/OFF,3 FILTER/OFF,UPR=0 PNT_G1 =FEAT/POINT,CARTESIAN,NO THEO/<0,0,-3.4>,<0,0,1> ACTL/<0,0,-3.4>,<0,0,1> CONSTR/POINT,CAST,CIR_G1 SCN4 =FEAT/SET,CARTESIAN THEO/<0,0,-4.075>,<0,0,1> ACTL/<0,0,-4.075>,<0,0,1> CONSTR/SET,BASIC,RAD_G_2.HIT[1..5],RAD_G_5.HIT[1..5],, CIR_G2 =FEAT/CIRCLE,CARTESIAN,OUT,LEAST_SQR,NO THEO/<0,0,-4.075>,<0,0,1>,2.4027 ACTL/<0,0,-4.075>,<0,0,1>,2.4027 CONSTR/CIRCLE,BF,2D,SCN4,, OUTLIER_REMOVAL/OFF,3 FILTER/OFF,UPR=0 PNT_G2 =FEAT/POINT,CARTESIAN,NO THEO/<0,0,-4.075>,<0,0,1> ACTL/<0,0,-4.075>,<0,0,1> CONSTR/POINT,CAST,CIR_G2 SCN7 =FEAT/SET,CARTESIAN THEO/<0,0,-4.75>,<0,0,1> ACTL/<0,0,-4.75>,<0,0,1> CONSTR/SET,BASIC,RAD_G_3.HIT[1..5],RAD_G_6.HIT[1..5],, CIR_G3 =FEAT/CIRCLE,CARTESIAN,OUT,LEAST_SQR,NO THEO/<0,0,-4.75>,<0,0,1>,2.4027 ACTL/<0,0,-4.75>,<0,0,1>,2.4027 CONSTR/CIRCLE,BF,2D,SCN7,, OUTLIER_REMOVAL/OFF,3 FILTER/OFF,UPR=0 PNT_G3 =FEAT/POINT,CARTESIAN,NO THEO/<0,0,-4.75>,<0,0,1> ACTL/<0,0,-4.75>,<0,0,1> CONSTR/POINT,CAST,CIR_G3 SCN10 =FEAT/SET,CARTESIAN THEO/<0,0,-7.66>,<0,0,1> ACTL/<0,0,-7.66>,<0,0,1> CONSTR/SET,BASIC,RAD_H_2.HIT[1..5],RAD_H_4.HIT[1..5],, CIR_H2 =FEAT/CIRCLE,CARTESIAN,OUT,LEAST_SQR,NO THEO/<0,0,-7.66>,<0,0,1>,2.3781 ACTL/<0,0,-7.66>,<0,0,1>,2.3781 CONSTR/CIRCLE,BF,2D,SCN10,, OUTLIER_REMOVAL/OFF,3 FILTER/OFF,UPR=0 PNT_H2 =FEAT/POINT,CARTESIAN,NO THEO/<0,0,-7.66>,<0,0,1> ACTL/<0,0,-7.66>,<0,0,1> CONSTR/POINT,CAST,CIR_H2 SCN13 =FEAT/SET,CARTESIAN THEO/<0,0,-7.45>,<0,0,1> ACTL/<0,0,-7.45>,<0,0,1> CONSTR/SET,BASIC,RAD_H_1.HIT[1..5],RAD_H_3.HIT[1..5],, CIR_H1 =FEAT/CIRCLE,CARTESIAN,OUT,LEAST_SQR,NO THEO/<0,0,-7.45>,<0,0,1>,2.3781 ACTL/<0,0,-7.45>,<0,0,1>,2.3781 CONSTR/CIRCLE,BF,2D,SCN13,, OUTLIER_REMOVAL/OFF,3 FILTER/OFF,UPR=0 PNT_H1 =FEAT/POINT,CARTESIAN,NO THEO/<0,0,-7.45>,<0,0,1> ACTL/<0,0,-7.45>,<0,0,1> CONSTR/POINT,CAST,CIR_H1 WORKPLANE/YMINUS LIN_GH =FEAT/LINE,CARTESIAN,UNBOUNDED,NO THEO/<0,0,-3.4>,<0,0,-1> ACTL/<0,0,-3.4>,<0,0,-1> CONSTR/LINE,BF,3D,PNT_G1,PNT_G2,PNT_G3,PNT_H1,PNT_H2,, OUTLIER_REMOVAL/OFF,3 FILTER/OFF,WAVELENGTH=0 WORKPLANE/ZPLUS A3 =ALIGNMENT/START,RECALL:STARTUP,LIST=YES ALIGNMENT/LEVEL,ZMINUS,LIN_GH ALIGNMENT/TRANS,XAXIS,LIN_GH ALIGNMENT/TRANS,YAXIS,LIN_GH ALIGNMENT/TRANS,ZAXIS,PLN_TOP ALIGNMENT/ENDComment
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Because I like to measure cylindrical features as cylinders, I make compound datums to the start/end points of the datum cylinders:
Code:CYL1 =FEAT/CONTACT/CYLINDER/DEFAULT,CARTESIAN,IN,LEAST_SQR THEO/<0,0,0>,<0,0,1>,20,3.05 ACTL/<0,0,0>,<0,0,1>,20,3.05 TARG/<0,0,0>,<0,0,1> START ANG=0,END ANG=0 ANGLE VEC=<0.7071068,-0.7071068,0> DIRECTION=CCW SHOW FEATURE PARAMETERS=NO SHOW CONTACT PARAMETERS=YES NUMHITS=3,NUMLEVELS=3,DEPTH=0,END OFFSET=0,PITCH=0 SAMPLE METHOD=SAMPLE_HITS SAMPLE HITS=0,SPACER=0 AVOIDANCE MOVE=NO,DISTANCE=10 FIND HOLE=DISABLED,ONERROR=NO,READ POS=NO SHOW HITS=NO CYL2 =FEAT/CONTACT/CYLINDER/DEFAULT,CARTESIAN,IN,LEAST_SQR THEO/<0,0,30>,<0,0,1>,10,3.05 ACTL/<0,0,30>,<0,0,1>,10,3.05 TARG/<0,0,30>,<0,0,1> START ANG=0,END ANG=0 ANGLE VEC=<0.7071068,-0.7071068,0> DIRECTION=CCW SHOW FEATURE PARAMETERS=NO SHOW CONTACT PARAMETERS=YES NUMHITS=3,NUMLEVELS=3,DEPTH=0,END OFFSET=0,PITCH=0 SAMPLE METHOD=SAMPLE_HITS SAMPLE HITS=0,SPACER=0 AVOIDANCE MOVE=NO,DISTANCE=10 FIND HOLE=DISABLED,ONERROR=NO,READ POS=NO SHOW HITS=NO START1 =GENERIC/POINT,DEPENDENT,CARTESIAN,$ NOM/XYZ,<CYL1.TSX,CYL1.TSY,CYL1.TSZ>,$ MEAS/XYZ,<CYL1.SX,CYL1.SY,CYL1.SZ>,$ NOM/IJK,<0,0,1>,$ MEAS/IJK,<0,0,1> END1 =GENERIC/POINT,DEPENDENT,CARTESIAN,$ NOM/XYZ,<CYL1.TEX,CYL1.TEY,CYL1.TEZ>,$ MEAS/XYZ,<CYL1.EX,CYL1.EY,CYL1.EZ>,$ NOM/IJK,<0,0,1>,$ MEAS/IJK,<0,0,1> START2 =GENERIC/POINT,DEPENDENT,CARTESIAN,$ NOM/XYZ,<CYL2.TSX,CYL2.TSY,CYL2.TSZ>,$ MEAS/XYZ,<CYL2.SX,CYL2.SY,CYL2.SZ>,$ NOM/IJK,<0,0,1>,$ MEAS/IJK,<0,0,1> END2 =GENERIC/POINT,DEPENDENT,CARTESIAN,$ NOM/XYZ,<CYL2.TEX,CYL2.TEY,CYL2.TEZ>,$ MEAS/XYZ,<CYL2.EX,CYL2.EY,CYL2.EZ>,$ NOM/IJK,<0,0,1>,$ MEAS/IJK,<0,0,1> LIN1 =FEAT/LINE,CARTESIAN,UNBOUNDED,NO THEO/<0,0,-3.05>,<0,0,1> ACTL/<0,0,-3.05>,<0,0,1> CONSTR/LINE,BF,3D,END1,START1,END2,START2,, OUTLIER_REMOVAL/OFF,3 FILTER/OFF,WAVELENGTH=0Comment
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Shouldn't this trick also work with concentricity? In 2019R1 is working only with position. When I try with concentricity A-B letters in edition window is red.Originally posted by bfire85 View PostComment
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The problem i seem to have with these compound datum is that you cannot use MMC on them. I have a cone to cone converter with datum A and B being the center of the inlet and outlet respectively. The inlet in center to the center line of the cone and the outlet is in the center but at an angle of 45 degrees. I get the compound datum A-B but the the <MC> falls away. Is this due to the fact that they not parallel to each other?Comment
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It's astounding. In cases like this, I always create a line between the datum A and B, designated it as AB (for example), and chose it in the FCF. It seems the time has come to recheck all the programs and compare the results
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I do the same... I'm using verison 2013 MR1 :| I cant type a hyphen in xact.Originally posted by Vladimir View PostIt's astounding. In cases like this, I always create a line between the datum A and B, designated it as AB (for example), and chose it in the FCF. It seems the time has come to recheck all the programs and compare the resultsComment
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I almost finished the process of rechecking programs, in most cases the hyphen between datums is actually applied, but in one of the programs I came across an error when introducing a hyphen "compound or pattern datum not valid as tertiary datum", but if I use the old method to build a line between datums and call it AB for example, then everything works as it should, is this the problem of my version PC DMIS? I use 2012.
1.jpgComment
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Using the hyphen combines single datum A and single datum B, making it a pattern/compound datum. Creating a line between them and using that as datum makes it a single datum (line, not compound/pattern). It has nothing to do with the PC-DMIS version, I believe you would get the same message in all versions of PC-DMIS using XactMeasure.
If you had created A-B as a feature set, you would still get the message (as a feature set is a compound/pattern datum).Last edited by vpt.se; 06-24-2020, 03:13 AM.PC-DMIS CAD++ 2o22.2 SP3Comment
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When i do this, i get an error that says "The second item must be the name of a plane, cylinder, cone, or line". I'm a little confused because those are the only features im using. I am doing a perpendicularity callout. Will this method still work with perpendicularity?Originally posted by bfire85 View Post
Thanks.Comment
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I don't think you can do an A-B on perpendicularity, unless A and B are along the same planar axis, like two concentric cylinders or two planes in the same Z axis.Originally posted by ThePudds View PostWhatever a man sows, he shall reap.Comment
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I haven't been using PC DMIS for long, so forgive me if this is a basic question.
I have to set up a program to report position of Datum...01-16-2019, 09:55 PM -
I'm not real good at describing what I want to know but I will give it a try:
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Hello folks,
I'm struggling with PCDMIS and would like some adivce. I use PCDMIS 2012. (programmation offline).
I trying...06-17-2013, 03:56 PM -
PcDmis 4.3 MR1 ?
Is it possible to give a datum a second letter or number when defining the datums?
example would be A1,...09-10-2009, 08:37 AM
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