How to Measure a short end-straight with a flange

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How to Measure a Short End Straight with a Flange in VTube-LASER


Vtube-laser screen 1 65.jpg




Difficult End Flanges

Vtube-laser endflange image1.jpg

End flanges can cause challenges when a bend is coming out of the flange. There is no first straight available where the tube comes out of the flange.

Vtube-laser endflange image2.jpg



Step 1 - End Scan

Start the TUBE measure feature in the MEASURE PROCESS menu, then switch the laser off for the end-scan use the ball probe to collect the end of the tube.

Vtube-laser endflange ballprobe endscan.jpg




Step 2 - Straight Measure

When measuring the straight, switch the laser off again. Probe the inside of the cylinder as shown here.

  • Measure along the first end of the cylinder shown in red points. Measure 3 points minimum. Do not take in a continuous stream of points, as the location of each point is much more critical.


  • Press the red button, then measure along the second part of the short straight as shown with the green cylinder.


  • Press the red button when finished with the second part of the straight.

Vtube-laser endflange ballprobe insidecylinderscan.jpg




Step 3 - Cylinder Fit Error

When measuring a short straight like this, the cylinder fit error window will most like display. This is normal as the straight is so short.

  • Decide if the fit numbers are acceptable. If they are just over the tolerance, then you can press "continue".


  • There is a second cylinder fit dialog that will not allow you to move forward. If this dialog displays, then the cylinder fit engine could not work with the points scanned to create a cylinder. You must remeasure in this case.


  • The image shows a short first cylinder measured from a 45mm diameter tube.

Vtube-laser cylinderfit accuracies dialog.jpg
Vtube-laser cylinderfit outoftolerance dialog.jpg
Vtube-laser cylinderfit shortcylinder.jpg