Which type of guard is not suitable for a full revolution press?

A full revolution press operates in a way that poses significant risks to workers anytime the machine is in operation. The use of appropriate safeguarding devices is crucial to ensure the safety of personnel working around such equipment.

An infrared barrier safeguarding device is not suitable for a full revolution press because it relies on a beam of light to detect the presence of an operator entering a dangerous area and stopping the machine’s operation. However, in the case of a full revolution press, the machine continues to operate and cycle through its motion even if a worker might inadvertently enter the hazard zone, which can lead to severe injuries. Other types of guards, such as mechanical gates or presence-sensing devices, are designed to immediately stop the machine when someone is detected in a danger zone, making them more appropriate for full revolution presses.

In contrast, other options like Type A and Type B gates, along with presence-sensing devices, provide more reliable methods of preventing access to the press during its operation, ensuring that operators are safeguarded effectively against accidental exposure to the dangerous moving parts.