A set of posts placed around the machine to detect the presence of people approaching it. They cause the device to stop working when the laser beam is exceeded. The set consists of a transmitter, a receiver and two reflecting mirrors, which ensures the machine is secured up to three sides.
It is the simplest solution in the field of machine protection. It consists of a few or a dozen fencing panels, placed around the machine, which prevent unauthorized persons from entering the device's work zone.