Hole axis

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  • Hole axis

    Can a hole axis be create and recognized as T value in CAD. The part has a hole that is smaller than any probe tip I have available. I would like to be able to place probe at surface of the hole and wall and recognize the hole axis real time in T (CAD). I have 2016 CAD++ SP7. Thanks in advance.

  • #2
    Search is your friend.

    https://www.pcdmisforum.com/forum/pc...724#post437724
    "This is my word... and as such is beyond contestation."

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    • #3
      Yes I know how to use the single click hole. What i would like to do is what I was able to do with some previous software is hold the probe in the hole at the mating surface and the probe read or measure the hole axis in real time T(CAD). I'm not wanting to create a program or a report. Just want the look at the T value on the screen while holding the probe in the hole. Is there a way to do this? Thanks

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      • #4
        hole axis? the only way to determine a vector is to establish a plane. a hole doesn't necessarily exist by itself but rather on a plane.

        i think that's what you're asking. Otherwise, your vector is assumed to be whatever your arm encoders are articulated to.
        Ex-Hex

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        • #5
          Enable the DRO window and right click on it to display some of the options you can use. Other than that, hold the probe against the surface the hole is in and look at the smaller DRO in the lower right corner of the PC-DMIS window. Might not give you the T-value per se, though.
          PC-DMIS CAD++ 2o18 R2 SP3

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          • #6
            I hard figure what's the _value for a hole...
            Something like sample hits around the hole obtained directly ?
            In this case, VinniUSMC gave the right link...

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            • #7
              Originally posted by Shoal Bass View Post
              Yes I know how to use the single click hole. What i would like to do is what I was able to do with some previous software is hold the probe in the hole at the mating surface and the probe read or measure the hole axis in real time T(CAD). I'm not wanting to create a program or a report. Just want the look at the T value on the screen while holding the probe in the hole. Is there a way to do this? Thanks
              Ah, you want to do like PolyWorks can do with the real time "Build/Inspect" mode. Sorry, I misread that.

              Well, even with PolyWorks, you would still need to align to the part, but in PC-DMIS, you might have to go an extra step. (I haven't touched Portable in PC-DMIS in several years now, so I don't know if PC-DMIS has the same capability or not.)

              Align to the part, auto-feature a single point circle, construct a generic point with the values from the circle, and dimension that:

              Code:
              CIR1       =FEAT/CONTACT/CIRCLE/DEFAULT,CARTESIAN,OUT,LEAST_SQR
                          THEO/<3235.54,552.281,2233.352>,<-0.9359515,-0.3463153,0.0637223>,6.15,0
                          ACTL/<3235.54,552.281,2233.352>,<-0.9359515,-0.3463153,0.0637223>,6.15,0
                          TARG/<3235.54,552.281,2233.352>,<-0.9359515,-0.3463153,0.0637223>
                          START ANG=90,END ANG=270
                          ANGLE VEC=<0.0525653,0,-0.9986175>
                          DIRECTION=CCW
                          SHOW FEATURE PARAMETERS=NO
                          SHOW CONTACT PARAMETERS=YES
                            NUMHITS=5,DEPTH=0.5,PITCH=0
                            SAMPLE METHOD=SAMPLE_HITS
                            SAMPLE HITS=0,SPACER=2
                            AVOIDANCE MOVE=BOTH,DISTANCE=15
                            FIND HOLE=CENTER,ONERROR=NO,READ POS=NO
                          SHOW HITS=NO
              PNT1       =GENERIC/POINT,DEPENDENT,CARTESIAN,$
                          NOM/XYZ,<CIR1.TX,CIR1.TY,CIR1.TZ>,$
                          MEAS/XYZ,<CIR1.X,CIR1.Y,CIR1.Z>,$
                          NOM/IJK,<CIR1.TI,CIR1.TJ,CIR1.TK>,$
                          MEAS/IJK,<CIR1.I,CIR1.J,CIR1.K>
              DIM LOC100= LOCATION OF POINT PNT1  UNITS=MM ,$
              GRAPH=OFF  TEXT=OFF  MULT=1.00  OUTPUT=BOTH  HALF ANGLE=NO
              AX       MEAS    NOMINAL       +TOL       -TOL        DEV     OUTTOL
              T        0.000      0.000      0.050      0.050      0.000      0.000
              END OF DIMENSION LOC100
              I think that's the best PC-DMIS can do.
              "This is my word... and as such is beyond contestation."

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              • #8
                OK Thanks for the replies. I had verisurf before and was able to create hole axis in CAD and was able to get real time data in build inspect mode quickly using the hole axis. It doesn't look like I will be able to do this with PC DMIS. Using PC DMIS it looks like I will have to go the extra step and measure and dimension the hole to get the info needed. Thanks again for the help.

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                • #9
                  Originally posted by Shoal Bass View Post
                  OK Thanks for the replies. I had verisurf before and was able to create hole axis in CAD and was able to get real time data in build inspect mode quickly using the hole axis. It doesn't look like I will be able to do this with PC DMIS. Using PC DMIS it looks like I will have to go the extra step and measure and dimension the hole to get the info needed. Thanks again for the help.
                  I went through the same troubles when switching from Verisurf to PC-DMIS. Try creating an auto-circle with a single point, execute it, and pull up your DRO with Dx,Dy and nest the probe.

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