Critical Factors Affecting Nozzle Shafts That Must Be Understood!

The nozzle shaft is another key factor impacting placement efficiency, with contributing factors divided into external and internal causes.

External Causes

On one hand, pressure leakage in the air supply circuit, such as aging or cracking of rubber air hoses, aging/wear of seals, and wear of the nozzle shaft after prolonged use. On the other hand, nozzle shaft clogging caused by adhesive residues or dust in the external environment—especially a large amount of debris generated after cutting components packaged in paper tape. Therefore, daily inspection of the nozzle shaft's cleanliness is required, and its component picking status should be monitored in real-time. Nozzle shafts that are clogged or perform poorly in picking should be cleaned or replaced promptly to maintain optimal condition. Additionally, during installation, the nozzle shaft must be correctly and securely mounted; otherwise, it may cause damage to the nozzle shaft or equipment.

Internal Causes

One aspect is insufficient vacuum pressure. Before picking components, the nozzle automatically switches the mechanical valve on the placement head from blowing to vacuum suction, generating a certain negative pressure. After picking up a component, the machine operates normally if the detection value of the negative pressure sensor is within a specified range; otherwise, picking failure occurs. Generally, the negative pressure at the nozzle from the pickup position to the placement position should be at least 400 mmHg, and for large components, it should be above 700 mmHg. Therefore, the filter inside the vacuum pump should be cleaned regularly to ensure sufficient negative pressure, and the working status of the negative pressure detection sensor should be checked periodically. Another aspect is that the filters on the placement head and nozzle shaft become contaminated, clogged, and blackened due to impure ambient environment or air supply. Thus, these filters should be replaced regularly: the filter on the nozzle shaft should be replaced at least once every half month, and the filter on the placement head at least once every six months to ensure unobstructed air flow.