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How to place points exactly on center line

Calvin.Korver
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/folders/1yzBjycglU4qLi_0le3OZHJnm9spsQhV9?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.
  • 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).
  • 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 

    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]
  • in reply to Douglas
    seems I did not properly tag the code...it includes a : doesn't it
  • in reply to Matthew D. Hoedeman
    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.
  • in reply to Matthew D. Hoedeman
    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.
  • 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
  • in reply to Douglas
    If you use the # button, you don't need to remember it Sunglasses
  • in reply to Calvin.Korver
    Ok, I feel like an idiot. I found the "to Points" button in the "Path Definition tab" which is what I need... pretty sure
  • 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
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