If a vacuum cup is not sealing but supply pressure is okay, what should be checked next?

When a vacuum cup is not sealing properly despite the supply pressure being acceptable, the next logical step is to check the vacuum pressure at the cup. This is crucial because the vacuum cup relies on an adequate vacuum pressure to achieve a proper seal against the surface it is intended to pick up.

If the vacuum pressure is insufficient, even with an intact supply pressure, the cup will fail to hold. Checking the vacuum pressure directly at the cup allows for a detailed examination of whether the cup itself is generating the necessary vacuum level to perform its job effectively.

This process can also uncover issues related to the vacuum system that aren't immediately apparent from simply inspecting the supply line or generator. Verifying vacuum pressure provides immediate feedback on the functionality of the system and indicates if further inspection or maintenance is required for the cup or the entire vacuum system.

While checking the supply line for leaks, the vacuum generator, or cleaning the cup surface could potentially be relevant in addressing the problem, the primary focus should first be on confirming that the vacuum pressure being generated at the cup is indeed adequate for its operation.