What is the main concern when using presence-sensing devices on a full-revolution press?

The priority concern when using presence-sensing devices on a full-revolution press is the failure to stop the press. Full-revolution presses can pose significant hazards due to their capability to produce a complete cycle of operation during which a worker may be at risk if the press does not stop upon detecting an obstruction or an operator's presence. The function of presence-sensing devices is to identify when someone may be in a dangerous location and to halt the operation of the press automatically to prevent injuries. If these devices fail to stop the press in a timely manner, it can lead to severe accidents and injuries, highlighting the critical importance of reliable and effective safety mechanisms in high-risk machinery.

Other concerns related to presence-sensing devices may include ensuring compliance with safety standards and considering cost implications, but the immediate safety hazard associated with a malfunctioning device is the most pressing issue when dealing with the operation of full-revolution presses.