End-Scan Using the End Wall

How to perform the end-wall end scan. Back to VTube-LASER See End-Scan Technique Research

Why the End-Scan technique is important

This end-scan method is useful for increase in precision over the scissor method. We recommend this for increased precision where high-reflectivity and burrs are not an issue on the end wall of the tube. The End Wall method is also very useful for thicker wall tubes. For tube walls with high-reflectivity and burrs, we recommend the most precise End-Scan Using End Targets.

Measure Setup

Set System Options, Measure 2 Tab, "Maximum Number of LLP Points in String" to 3 Set Measure Setup - LASER Tab: The LASER defaults to ON for CYLINDERS and END-SCANS. Set Measure Setup - LASER Tab: Cylinder stripes = 3 to 5 Set Measure Setup - LASER Tab: End-scan stripes = 5 Set Measure Setup - LASER Tab: Split bend stripes = 5 Set Measure Setup = Scan Rates Tab: Set all rates to TIMER for all scan types. Set Measure Setup = Scan Rates Tab: Set the Scan Rates TIMER is set to 0 for all TIMERS.

How To Use This End-Scan Technique

Align the scanner at the end wall of the tube. Be careful to not allow the laser reflection to strike you in the eyes. Attempt to hold the laser motionless when collecting the stripes across the end to increase repeatability. Consistently place the line across the same area of the tube end from measure to measure. Press the green button until VTube-LASER is finished scanning all the end stripes. The advantage of this method is that it is easy to use. The disadvantage is that it is more prone to outlier points from the inner diameter surface.

Another Way to Use This End-Scan Technique

An alternative way to scan the end is to align the scanner so that it touches one end wall of the tube. The advantage of this method is that it is less prone to outlier points. The disadvantage is that it is hard to aim at thinner walls.

Avoiding Outliers

When scanning the end walls of highly reflective tubing with striations like shown in the image on the right, it is better to either cover the end with a coat of Maganaflux or Dynaflux spray, or cover it with an end target. The image below an end target plastic label attached to the end of the same tube. In this case, there are no striations visible.

Other Pages

• See also End-Scan Using the Scissor Motion
• See also End-Scan Using End Targets
• Back to VTube-LASER