MES project import-module analysis-SMT loading error prevention system (error proof system)

 

Error proof system)

I. Demand factors
External factors:

• RoHS and other mandatory regulations require manufacturers to self-declare whether to comply with legal requirements and provide traceability queries as needed, thus highlighting the necessity of traceability. In the event of any product quality incidents, traceability can narrow down the scope of product recall, so as to help reduce the loss caused by the Recall product and provide sufficient information to identify the cause of the accident and improve the product quality. Traceability is provided to meet the requirements of customers, markets and laws, which greatly improves the competitiveness of manufacturers.

• The thinning of components may increase the feeding cost and increase the loading error multiple times;

Consumer demand for personalized electronic products has intensified, leading to faster modularization and refinement of electronic components. Some enterprises can achieve batch production by increasing labor hours, the small development of devices will lead to an increasing risk of quality accidents, and a considerable part of these accidents will be discovered after being delivered to the customer, this may cause serious loss of the company's image and cost, and the possibility of loss of customers.

Internal factors:

• Inevitable requirements for sustainable business development;

The intensification of competition in the industry has led SMT enterprises to continuously improve efficiency to reduce costs. With the increase of outsourcing business, brand owners pay more attention to protecting their own brand image and e-manufacturing services (EMS) providers need to respond to this challenge by providing traceability information to retain existing customers and acquire new manufacturing orders.

• Inevitable requirements for improving the manufacturing management level of SMT enterprises:

The product quality traceability capability is increasingly valued by customers. Its ability directly reflects the quality management level and quality assurance capability of enterprises. The EPS provides a comprehensive solution for quality traceability, the customer only needs to feedback the PID of the product, which can be traced back to the manufacturer, cycle, Lot No, and other related information of any part of the product;

2. Solutions
EPS is a system designed specifically for these problems. Using bar code technology, the system integrates bar code acquisition terminals, bar code printers, and other hardware devices to develop a mature system.

(1) first, the materials must be uniformly encoded, followed by certain encoding rules, and pasted on the material tray to identify the hardware by bar code, including line encoding and device encoding, platform code, feeder code. And paste the barcode at the corresponding location of the device.


(2) the EPS needs to import the materials from the site table. Generally, there are two parts: the part is the BOM of the ticket ingredients (including the material code and symbol number 〕, the other part is the process BOM prepared by the process personnel. This process BOM does not contain specific material information, but only provides the position and feeder specification information of a SMT device corresponding to each symbol. The process BOM data is basically fixed for each device. Only the BOM data of ticket ingredients is changed. The BOM data of ticket ingredients is usually generated and adjusted in the ERP system, the possibility of errors is extremely small.

(3) Material check:
When switching the production model, the PC will import the site table information to the handheld terminal;
When changing materials, you also need to use a hand-held terminal for verification;
Material check is required during shift change.
If the data is incorrect, the system prompts and sends an alarm.

(4) Check Method:

(5) other system functions:
Operation Log function: employees use the bar code scanning terminal to perform the switchover and material replacement operations, regardless of whether the operation is correct or wrong.
Report function: Provides the report on device type information replacement, device type switching, material replacement, and substitute usage.
(6) Pay attention to the following four aspects during SMT:
A. the BOM information must be correct;
B. The BOM of the SMT engineering department is correctly maintained, and the program information database is generated correctly;
C. The materials are the same as the labels of the reel. iqc must ensure that the labels are correctly pasted;
D. The loading personnel put the rolling tray in the wrong place. At this time, the separation system between the loading personnel and the loading personnel should be established to supervise each other and check each other for errors; ensure that the materials are safe and reliable;

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