How to place points exactly on center line

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  • How to place points exactly on center line

    I am trying to Probe a line right down the center of my part where the hits come in from the appropriate angles. I could make it from individual points or a line, but I don't have scanning capabilities. I have attached some pictures that should help you understand what I am going for. https://drive.google.com/drive/folde...V9?usp=sharing (let me know if you can't see them)

    My main question is how to I put the points for a profile exactly on the centerline.

  • #2
    type in the "ZERO" value in the correct axis for the line you want either after clicking close to where you want the hit, or by typing in several values.

    there are many ways to defur this feline.

    If you have CAD++ you have scanning abilities, just not continuous contact scanning.

    Open linear open scan, click the start point, the direction you want to go, and the end point. THEN, type in a common axis value for all scan line (so all 3 points have a Y0 value), then generate, turn on FIND NOMS. It will scan, but it will run like regular vector points (or like a sewing machine).
    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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    • Calvin.Korver
      Calvin.Korver commented
      Editing a comment
      Ok, so I am in the Linear Open Scan edit window. I think I am able to follow all the sets except I can't seem to edit the points in the "Boundary Points" section.
      Is there a different place I am supposed to edit these points?

      Edit: Nevermind I found it. The trick was clicking on the far left # column.
      Last edited by Calvin.Korver; 07-22-2020, 02:28 PM.

    • Matthew D. Hoedeman
      Matthew D. Hoedeman commented
      Editing a comment
      nope, that is the place, simply DOUBLE CLICK on the number to the LEFT of the XYZ values (there should be a 1, 2, & 3, dbl-click on the 1). I you want a line of points along the Y axis, then type in the Y value you want, hit enter, it will automatically go to the (2) point, y axis, type in the same number, hit enter, and the (3) point opens, defaulted on the Y, type in the same number, hit enter. They are now in the straight line, now is when you generate the scan (NOT measure, NOT create, GENERATE). Then create it.

  • #3
    Just touch probing auto lines I do two lines on the OD of a part to get the bevel angle fast that way where it is not critical... you will see theo are bang on but measured might be off a bit... still better than I can hold a protractor though

    [CODE]
    30DEG_BEVEL=FEAT/CONTACT/LINE/DEFAULT,CARTESIAN,UNBOUNDED
    THEO/<0,11.285,3.25>,<0.0000003,-0.8660266,-0.499998>,<-0.0000004,-0.499998,0.8660266>,<1,0,0.0000005>,0.9075
    ACTL/<0,11.2622,3.2893>,<0.0000003,-0.8660012,-0.5000419>,<-0.0000004,-0.5000419,0.8660012>,<1,0,0.0000005>,0.9081
    TARG/<0,11.285,3.25>,<0.0000003,-0.8660266,-0.499998>,<-0.0000004,-0.499998,0.8660266>,<1,0,0.0000005>
    SHOW FEATURE PARAMETERS=YES
    VOID DETECTION=NO
    SURFACE1=THEO_THICKNESS,0
    SURFACE2=THEO_THICKNESS,0
    MEASURE MODE=NOMINALS
    RMEAS=NONE,NONE,NONE
    AUTO WRIST=NO
    CLEARPLANE=NO
    GRAPHICAL ANALYSIS=NO
    FEATURE LOCATOR=NO,NO,""
    SHOW CONTACT PARAMETERS=YES
    NUMHITS=7,DEPTH=0
    SAMPLE METHOD=SAMPLE_HITS
    SAMPLE HITS=0,SPACER=0,INDENT1=0,INDENT2=0
    AVOIDANCE MOVE=NO,DISTANCE=1
    SHOW HITS=NO
    MOVE/POINT,NORMAL,<-0.0000,11.3750,3.6250>
    LIN1 =FEAT/CONTACT/LINE/DEFAULT,CARTESIAN,UNBOUNDED
    THEO/<0,11.75,3.375>,<0,1,0>,<-0.0000005,0,1>,<1,0,0.0000005>,2
    ACTL/<0,11.75,3.3759>,<0,1,0.0000694>,<-0.0000005,-0.0000694,1>,<1,0,0.0000005>,2.0002
    TARG/<0,11.75,3.375>,<0,1,0>,<-0.0000005,0,1>,<1,0,0.0000005>
    SHOW FEATURE PARAMETERS=YES
    VOID DETECTION=NO
    SURFACE1=THEO_THICKNESS,0
    SURFACE2=THEO_THICKNESS,0
    MEASURE MODE=NOMINALS
    RMEAS=NONE,NONE,NONE
    AUTO WRIST=NO
    CLEARPLANE=NO
    GRAPHICAL ANALYSIS=NO
    FEATURE LOCATOR=NO,NO,""
    SHOW CONTACT PARAMETERS=YES
    NUMHITS=7,DEPTH=0
    SAMPLE METHOD=SAMPLE_HITS
    SAMPLE HITS=0,SPACER=0,INDENT1=0,INDENT2=0
    AVOIDANCE MOVE=NO,DISTANCE=1
    SHOW HITS=NO
    [CODE]

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    • Douglas
      Douglas commented
      Editing a comment
      seems I did not properly tag the code...it includes a : doesn't it
      Last edited by Douglas; 07-22-2020, 02:24 PM.

    • Mike Ruff
      Mike Ruff commented
      Editing a comment
      If you use the # button, you don't need to remember it

  • #4
    I'm new to the whole scan thing. I think my CMM is trying to do the continuous contact scanning that Matthew mentioned. It comes nice and slowly to where I want it to start probing then errors out upon contact. Is there something I need to switch to just get it to take a line of points?

    beginning tool path looks like this Snapchat-1037678522.jpg
    Last edited by Calvin.Korver; 07-22-2020, 04:05 PM.

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    • Calvin.Korver
      Calvin.Korver commented
      Editing a comment
      Ok, I feel like an idiot. I found the "to Points" button in the "Path Definition tab" which is what I need... pretty sure

  • #5
    I use the grid in graphic view>Toggle Graphic Window 3D Grid. I square up to the surface I am placing the point on then I zoom all the way in to the X, Y and or Z values I need. This allows me to place a point exactly on zero on any given surface.


    EDIT: Never try to place points or scans on a CAD seam, PC-DMIS doesn't like that
    Last edited by YGOLORTEM; 07-23-2020, 09:59 AM.
    Jesse Krook

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