Which is NOT a requirement of an effective machine guard?

An effective machine guard is designed to ensure safety and mitigate risks associated with operating machinery. One of the critical functions of a machine guard is to prevent any objects, including tools or materials, from falling into moving parts. This is important because if objects do fall into the machinery, they can cause jams, malfunction, or even accidents that may injure operators or bystanders.

An effective machine guard should prevent contact with the moving parts of the machine, be securely attached to the equipment to maintain its function, and must not create new hazards in the work environment. Therefore, allowing objects to fall into moving parts directly contradicts the fundamental purpose of machine guarding, which is to enhance safety and streamline the machinery's operations without unnecessary risks.