The successful exhibition "Digital Factory" at the International Engineering Fair in Brno brought many people interested in the digitalization of production to our stand, who were able to learn about the latest technologies of industrial digitalization and the Act-in MES platform for complete paperless production control and predictive maintenance through practical examples. Visitors appreciated the overall concept of the demonstration of a live mini-digital factory with a real demonstration of all modules of the MES system, CMMS system and OEE measurement system both at the machine workplace equipped with a machining CNC machine and at the assembly workplace with real and virtual assembly of the tool holder of the machining center. Interest is traditionally attracted by the opportunity to try training in virtual reality realized on a specific assembly of a tool holder and to get acquainted with the latest trends in virtual, mixed and augmented reality.