ATS800 SVI Measurements

Surface Vector intersection Measurements

The ATS refectorless measurement capability provides a means to precisely measure a point location on a surface. Vectors normal to that surface can be used to identify exactly where to measure on an actual part regardless of thickness variation. This corrects for a potentially significant shift in the location of the returned point depending on the incidence angle to the part if nominal points on the part are used rather than vectors. SVI (Surface Vector Intersection) measurements provides an auto-measure function which can be used for this type of application.

If you have a CAD model, its very easy to construct a grid of points on a surface using: Points Evenly-Spaced on Mesh Surfaces in UV

Then you can query those points to the CAD to build Vectors normal to the surface.

 

For settings, go to the Gear Tool (General Settings) in the main tracker interface window, and hit [Leica ATS] button

To initiate this measurement, just go to the SA Instrument menu, and select Instrument>Automatic Measurement > Measure Batch of Vectors

Measurement details will include the “Max Expected Part Deviation” and “Threshold” values used, and the resultant point’s distance from the vector.

 

Automated Measurement using SVI

In addition to direct measurement, SVI measurements can be setup in advance. As of the 2025.1 version of SA these SVI measurements can be pre-configured as part of a template by using the Trapping Controls within a relationship's properties.

Use the Guide Vectors selection option to set the desired drive vectors and enable the Auto Measure Guide Data check box:

Its important to first align the instrument within the job file but they trapping can trigger the SVI measurement process.

When trapping is initiated for this feature it will automatically try to measured the guide vectors.