Print and Surface Inspection

In print inspection every print is compared with a reference image: color shift, missing print, misregistration and stains are detected. In surface inspection, scratches, dents, bubbles and texture irregularities are made visible with low-angle bar lighting and classified with deep learning.

Area or line scan cameras are used depending on line speed; with encoder triggering the image geometry stays correct even when belt speed changes. Defective regions are logged with coordinates and, if desired, the faulty product is rejected with a pneumatic pusher.