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The first inspection mechanism refers to an error-proof mechanism to prevent mass accidents. Before PCBA mass production or at the beginning of each shift or after the process is changed, the first or first few products processed on the production line will be processed. All-round testing. After all the tests have passed, the formal mass production will start. This can reduce the risk of wrong parts, reduce the probability of errors, and effectively improve the quality of the entire production. This method is the first piece inspection mechanism (FAI). -First Article Inspection)
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About the first inspection in PCBA processing
First article inspection generally occurs in the following situations:
1. The new product goes online for the first time
2. The beginning or handover of each work class
3. Change product model
4. Adjust equipment, fixtures and materials
5. Change technical conditions, process methods and process parameters
6. After adopting new materials or changing ECN materials
Requirements for first article inspection:
About the first inspection in PCBA processing
The first article inspection adopts three inspection systems: self-inspection, mutual inspection and special inspection.
1. The products submitted for inspection must be "self-inspected" by the operator first, then "mutual inspection" by the team leader or colleagues, and finally "special inspection" by the inspector. After confirming that it is qualified, the subsequent products can be processed.
About the first inspection in PCBA processing
2. After the first piece of inspection, whether it is qualified or not, it should be approved by a full-time inspector. The inspector shall put the required mark on the first product that passes the inspection and keep it until the shift or batch of products is processed (all first pieces) Samples of the product must be retained for subsequent product comparison to see if the process has changed, and mark "√" with a marker to show that it has passed the first article inspection).
About the first inspection in PCBA processing
3. If the first piece is unqualified, the reasons should be found out, measures should be taken, and the fault should be re-processed and three inspections should be carried out. The first piece can only be determined after it is qualified.
The purpose of the first article inspection:
About the first inspection in PCBA processing
1. The first piece inspection in the production process is mainly to prevent products from being out of tolerance, repairing and scrapping in batches. It is a means of pre-controlling the production of products, an important method of product process quality control, and the company's assurance Product quality, an effective and indispensable method to improve economic efficiency.
About the first inspection in PCBA processing
2. The first inspection is to find the factors that affect the quality of the product as soon as possible in the production process, and to prevent batch defects or scrap.
About the first inspection in PCBA processing
3. The first product can enter the formal production after passing the inspection, mainly to prevent the occurrence of batches of unqualified products.
About the first inspection in PCBA processing
4. Long-term practical experience has proved that the first inspection system is an effective measure to detect problems as early as possible and prevent products from being scrapped in batches. Through the first article inspection, it can be found that there are systemic reasons such as severe wear of the tool and fixture or installation and positioning errors, poor accuracy of measuring instruments, misreading of drawings, feeding or formula errors, etc., so that corrective or improvement measures can be taken to prevent batch failures. Qualified products occur.
