An Approach to The Implementation of the Machine Safety Function Using an Integrated in the CNC System Softplc and an External Safety Controller Made According to the SoftPlC

The work is devoted to the study and solution of the problems of safety operation of CNC equipment in “smart” digital manufacture. The principles of ensuring the safety operation of CNC machine mechanisms based on external programmable logic safety controllers are considered. Theoretical aspects of the development and practical solution of Safety PLC for technological equipment operating in automatic mode are presented. The general principle of functioning of the system of checking and ensuring the safety operation of the machine tools mechanisms, built based on a SoftPLC integrated in the CNC system and an external Safety controller made according to the SoftPLC type, is described. As an example, a technical solution to ensure the safe operation of the brake of the vertical axis of a CNC machine is demonstrated. A block diagram of the algorithm of the operation and a software implementation of the Safe Brake Test functional block are presented.