The film presents the printing process of a precise KELLER pad printing machine made on water meter discs. The machine has the ability to print 3 colors, the movement of printing pads is carried out by servodrives. The machine also has a vision quality control system that allows the automatic rejection of incorrectly printed details during unloading. The solutions in the machine have been selected to ensure the best quality and performance. Each machine built by KELLER has the function of customized adjusting to the printed product. The printing pads that were used in the machine are also made by KELLER.