Xaptec 3D measuring bar

Xaptec 3D measuring bars also measure R2R films in the third dimension. The height profile of the film is scanned continuously in the CD direction.

Measured variables:

• Waviness
• Height difference
• Width

Laser lines

For 3D measurement, several laser lines are projected onto a film. A Xaptec measuring bar uses triangulation to determine the position of this line across the entire width of the film web and calculates a height profile even for transparent films.

The 3D measuring systems are manufactured in three basic configurations. The characteristics of these variants, XC1, XC2, and XC3, are outlined here. 

 3D system arrangement

A 3D measuring system consists of a measuring bar and a laser bar. The choice of angles to each other and the choice of spectral color of the laser can be varied depending on the application.

To detect defects such as black spots or gels, additional constellations of measuring bars are connected downstream if necessary, which work with diffuse transmitted light or incident light. 

Transillumination of films

In addition to 3D measurement technology, Xaptec measuring bars are also combined with diffuse light bars. For the detection of: gels, black spots, bubbles, dents, pores, streaks, grooves, and cracks.

Illumination of films

Powerful LED light bars can be used to illuminate even partially opaque films in order to detect and document defects.

Thickness measurement on films

3D measuring bars can also be used to measure film thicknesses. Even with a low number of only 10 windings, differences in film thickness across the direction of travel can be determined in the micrometer range on a roll.