Iterative alignment

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  • Iterative alignment

    I have been trying to do an iteritive alignment and I keep getting an alignment error. I can see in the code that it levels to z, but both rotate and origin are set to default. I have redone the alignment a few times but it gives me the same thing, can some one help me?

  • #2
    Can you post the program code?
    sigpicIt's corona time!
    737 Xcel Cad++ v2009MR1....SE HABLA ESPAÑOL

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    • #3
      or the print?
      im gonna miss you bob....

      sigpic

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      • #4
        Use the points/features that you are using for the IT alignment to first create a non-IT alignment.
        Then create an IT alignment with those same points.
        If the first (non-IT alignment) works, then the IT alignment should work.
        If the first one doesn't work you can trouble-shoot that to figure out what you are doing to create the error.
        Lately, it occurs to me
        What a long, strange trip it's been.

        2017 R1 (Offline programming)

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        • #5
          Originally posted by Roberto View Post
          Can you post the program code?
          This is the code, I know it is weird to call the features that but it is what is called out on the print.

          X_1 =AUTO/VECTOR POINT,SHOWALLPARAMS = NO
          THEO/149.9663,103.3344,13.5941,0,0,-1
          ACTL/448.665,-302.8474,752.6256,-0.2586758,0.2503697,-0.9329533
          TARG/149.9663,103.3344,13.5941,0,0,-1
          X_2 =AUTO/VECTOR POINT,SHOWALLPARAMS = NO
          THEO/-111.3693,-28.3572,-85.518,0,0,-1
          ACTL/177.0797,-426.4648,653.2536,-0.2531379,0.2486291,-0.9349357
          TARG/-111.3693,-28.3572,-85.518,0,0,-1
          X_3 =AUTO/VECTOR POINT,SHOWALLPARAMS = NO
          THEO/180.1663,-295.7333,659.609,0,0,-1
          ACTL/177.101,-297.5849,659.6827,0,0,-1
          TARG/180.1663,-295.7333,659.609,0,0,-1
          Z_1 =AUTO/VECTOR POINT,SHOWALLPARAMS = NO
          THEO/167.2597,-299.605,664.7056,-1,0,0
          ACTL/169.6734,-299.1191,662.6662,-1,0,0
          TARG/167.2597,-299.605,664.7056,-1,0,0
          TIP/T1A90B0, SHANKIJK=0, 1, 0, ANGLE=0
          Y_1 =AUTO/VECTOR POINT,SHOWALLPARAMS = NO
          THEO/428.026,-821.4994,763.5051,0,-1,0
          ACTL/430.0459,-818.675,764.786,0,-1,0
          TARG/428.026,-821.4994,763.5051,0,-1,0
          Y_2 =AUTO/VECTOR POINT,SHOWALLPARAMS = NO
          THEO/172.3264,-801.8699,815.6673,0,-1,0
          ACTL/174.7798,-799.0267,820.205,0,-1,0
          TARG/172.3264,-801.8699,815.6673,0,-1,0
          CLEARP/ZMINUS,24,ZMINUS,0
          A0 =ALIGNMENT/START,RECALL:STARTUP, LIST= YES
          ALIGNMENT/ITERATE
          PNT TARGET RAD = 10, START LABEL = , FIXTURE TOL = 1, ERROR LABEL =
          MEAS ALL FEAT = ALWAYS ,MAX ITERATIONS = 3 ,LEVEL AXIS=ZAXIS ,ROTATE AXIS=Default ,ORIGIN AXIS=Default
          LEVEL = X_1,X_2,X_3,,
          ROTATE = Y_1,Y_2,,
          ORIGIN = Z_1,,
          ALIGNMENT/END

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          • #6
            This is the 1st alignment, notice my choices / answers Use the drop down boxes to change your axis and origin from default to "see below"

            A0 =ALIGNMENT/START,RECALL:STARTUP, LIST= YES
            ALIGNMENT/ITERATE
            PNT TARGET RAD = 0.5, START LABEL = , FIXTURE TOL = 0, ERROR LABEL =
            MEAS ALL FEAT = ONCE ,MAX ITERATIONS = 4 ,LEVEL AXIS=ZAXIS ,ROTATE AXIS=XAXIS ,ORIGIN AXIS=YAXIS
            LEVEL = MANPNT1,MANPNT2,MANPNT3,MANPNT4,,
            ROTATE = MANCIR1,MANCIR2,,
            ORIGIN = MANCIR1,,
            ALIGNMENT/END
            Last edited by AuRules; 01-09-2013, 01:42 PM.
            sigpic

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            • #7
              Code:
              X_1 =AUTO/VECTOR POINT,SHOWALLPARAMS = NO
              THEO/149.9663,103.3344,13.5941,0,0,-1
              ACTL/448.665,-302.8474,752.6256,-0.2586758,0.2503697,-0.9329533
              TARG/149.9663,103.3344,13.5941,0,0,-1
              X_2 =AUTO/VECTOR POINT,SHOWALLPARAMS = NO
              THEO/-111.3693,-28.3572,-85.518,0,0,-1
              ACTL/177.0797,-426.4648,653.2536,-0.2531379,0.2486291,-0.9349357
              TARG/-111.3693,-28.3572,-85.518,0,0,-1
              X_3 =AUTO/VECTOR POINT,SHOWALLPARAMS = NO
              THEO/180.1663,-295.7333,659.609,0,0,-1
              ACTL/177.101,-297.5849,659.6827,0,0,-1
              TARG/180.1663,-295.7333,659.609,0,0,-1
              Z_1 =AUTO/VECTOR POINT,SHOWALLPARAMS = NO
              THEO/167.2597,-299.605,664.7056,-1,0,0
              ACTL/169.6734,-299.1191,662.6662,-1,0,0
              TARG/167.2597,-299.605,664.7056,-1,0,0
              TIP/T1A90B0, SHANKIJK=0, 1, 0, ANGLE=0
              Y_1 =AUTO/VECTOR POINT,SHOWALLPARAMS = NO
              THEO/428.026,-821.4994,763.5051,0,-1,0
              ACTL/430.0459,-818.675,764.786,0,-1,0
              TARG/428.026,-821.4994,763.5051,0,-1,0
              Y_2 =AUTO/VECTOR POINT,SHOWALLPARAMS = NO
              THEO/172.3264,-801.8699,815.6673,0,-1,0
              ACTL/174.7798,-799.0267,820.205,0,-1,0
              TARG/172.3264,-801.8699,815.6673,0,-1,0
              CLEARP/ZMINUS,24,ZMINUS,0
              A0 =ALIGNMENT/START,RECALL:STARTUP, LIST= YES
              ALIGNMENT/ITERATE
              PNT TARGET RAD = 10, START LABEL = , FIXTURE TOL = 1, ERROR LABEL = 
              MEAS ALL FEAT = ALWAYS ,MAX ITERATIONS = 3 ,LEVEL AXIS=ZAXIS ,ROTATE AXIS=Default ,ORIGIN AXIS=Default
              LEVEL = X_1,X_2,X_3,,
              ROTATE = Y_1,Y_2,,
              ORIGIN = Z_1,,
              ALIGNMENT/END
              sigpicSTANDING CORRECTED IS THE ONLY WAY I STAND

              Comment


              • #8
                Originally posted by AuRules View Post
                This is the 1st alignment, notice my choices / answers Use the drop down boxes to change your axis and origin from default to "see below"

                A0 =ALIGNMENT/START,RECALL:STARTUP, LIST= YES
                ALIGNMENT/ITERATE
                PNT TARGET RAD = 0.5, START LABEL = , FIXTURE TOL = 0, ERROR LABEL =
                MEAS ALL FEAT = ONCE ,MAX ITERATIONS = 4 ,LEVEL AXIS=ZAXIS ,ROTATE AXIS=XAXIS ,ORIGIN AXIS=YAXIS
                LEVEL = MANPNT1,MANPNT2,MANPNT3,MANPNT4,,
                ROTATE = MANCIR1,MANCIR2,,
                ORIGIN = MANCIR1,,
                ALIGNMENT/END
                I am picking the same features but when it prints the code to the report it puts in default instead of the features I pick.

                Comment


                • #9
                  Originally posted by Keren McComas View Post
                  I am picking the same features but when it prints the code to the report it puts in default instead of the features I pick.

                  A0 =ALIGNMENT/START,RECALL:STARTUP, LIST= YES
                  ALIGNMENT/ITERATE
                  PNT TARGET RAD = 0.5, START LABEL = , FIXTURE TOL = 0, ERROR LABEL =
                  MEAS ALL FEAT = ONCE ,MAX ITERATIONS = 4 ,LEVEL AXIS=ZAXIS ,ROTATE AXIS=XAXIS ,ORIGIN AXIS=YAXIS
                  LEVEL = MANPNT1,MANPNT2,MANPNT3,MANPNT4
                  ROTATE = MANCIR1,MANCIR2,,
                  ORIGIN = MANCIR1,,
                  ALIGNMENT/END[/QUOTE]

                  Are you chosing your axis or using the default. Check level, using the pull down box check your axis that matches your cad model, choose your measured features and then click select.
                  Last edited by AuRules; 01-09-2013, 02:08 PM.
                  sigpic

                  Comment


                  • #10
                    Code:
                    X_1 =AUTO/VECTOR POINT,SHOWALLPARAMS = NO
                    THEO/149.9663,103.3344,13.5941,0,0,-1
                    ACTL/448.665,-302.8474,752.6256,-0.2586758,0.2503697,-0.9329533
                    TARG/149.9663,103.3344,13.5941,0,0,-1
                    X_2 =AUTO/VECTOR POINT,SHOWALLPARAMS = NO
                    THEO/-111.3693,-28.3572,-85.518,0,0,-1
                    ACTL/177.0797,-426.4648,653.2536,-0.2531379,0.2486291,-0.9349357
                    TARG/-111.3693,-28.3572,-85.518,0,0,-1
                    X_3 =AUTO/VECTOR POINT,SHOWALLPARAMS = NO
                    THEO/180.1663,-295.7333,659.609,0,0,-1
                    ACTL/177.101,-297.5849,659.6827,0,0,-1
                    TARG/180.1663,-295.7333,659.609,0,0,-1
                    Do you know why the actuals on X_1 and X_2 are so far out compaired to X_3?
                    sigpicIt's corona time!
                    737 Xcel Cad++ v2009MR1....SE HABLA ESPAÑOL

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                    • #11
                      Do you know why the actuals on X_1 and X_2 are so far out compaired to X_3?[/QUOTE]

                      I changed the ones on x_3 It wouldn't let me change the others.

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                      • #12
                        Originally posted by Keren McComas View Post
                        Do you know why the actuals on X_1 and X_2 are so far out compaired to X_3?
                        I changed the ones on x_3 It wouldn't let me change the others.[/QUOTE]

                        changed what? the ACTUALS? You can't change the actuals. The THEO's? You can't just willy-nilly change the THEO (nominals) of features. You have to have the correct THEO's for all points in the program, including the points used in an iterative alignment.
                        sigpic
                        Originally posted by AndersI
                        I've got one from September 2006 (bug ticket) which has finally been fixed in 2013.

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                        • #13
                          Originally posted by Matthew D. Hoedeman View Post
                          I changed the ones on x_3 It wouldn't let me change the others.
                          changed what? the ACTUALS? You can't change the actuals. The THEO's? You can't just willy-nilly change the THEO (nominals) of features. You have to have the correct THEO's for all points in the program, including the points used in an iterative alignment.[/QUOTE]

                          Sorry I should have said I changed the vectors not the hit actuals.

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                          • #14
                            do you have your find nominals turned on under F5
                            sigpic

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                            • #15
                              The relationship between your ACTUAL and THEO on these datum points does NOT make sense and here's why:

                              1, If you start off with your m/c co-ordinate system then you should always have huge deviation between ACTUAL and THEO, even with totally wrong ijk because your THEO is from CAD but your ACTUAL is obtained from m/c. So your 3 X points seem normal but how can those Y and Z points within 3 mm deviation from ACTUAL to THEO? That means the relationship between your X points and YZ points is already broken in ACTUAL readings.

                              2, If you just look at your THEO on 3 X points, these are 0,0,-1 points, the difference between X1 and X3 is more than 600mm, but the elevation in X,Y direction is much less, so pc-dmis will have tough time to use these 3 X points for level.

                              I'll suggest the following:
                              1, Double check your THEO values, re-think which points are reasonable for level;
                              2, Reset all ACTUAL value and run from scratch, just do the manual measurement, do go ahead with iterative alignment yet;
                              3, Look through your ACTUAL value to make sure they make sense under your m/c co-ordinate system;
                              4, If everything okay then go ahead with iterative alignment (with all axis set as default option);

                              It should work.

                              Best Regards,

                              Ray Xing
                              GDTP S-0605
                              CGP Certified (ITAR equivalent)
                              CMM Application Specialist
                              RX Metrology Solutions Inc.
                              One stop solution for self-paced Metrology training
                              www.rxmetrology.com

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