Precision PCB Fabrication, High-Frequency PCB, High-Speed PCB, Standard PCB, Multilayer PCB and PCB Assembly.
The most reliable PCB & PCBA custom service factory.
PCBA manufacturer will have a lot of PCBA defective products and processing problems in the process of PCBA manufacturing, such as component leakage, side parts, turnover, deviation, damaged parts and so on, which will seriously affect the product quality of PCBA manufacturers; Now, the experienced and professional Shenzhen SMT Shiyan patch factory, weisiyuan technology, will share with you the reasons for the missing and damaged parts of PCBA board patch processing encountered in the process of PCBA manufacturing.
1. PCBA manufacturing leakage
It is usually caused by inadequate feeding by the component feeder, blockage of the air path of the component suction nozzle, damage of the suction nozzle, incorrect height of the suction nozzle, vacuum air path failure of SMT technology equipment, blockage, poor purchase of PCB circuit board, deformation, no solder paste or too little solder paste on the pad of PCB circuit board, quality problems of components, inconsistent thickness of the same variety SMT technology equipment Mounter calls the program with errors or omissions, or SMT technicians make mistakes in the selection of component thickness parameters during programming, inadvertently knocked off by human factors, etc.
2. The main causes of turning over and side parts during resistor mounting are abnormal feeding of component feeder, incorrect height of mounting head suction nozzle of SMT technology equipment mounter, incorrect height of mounting head grasping material, excessive size of loading hole of component braiding, component overturning due to vibration, reverse direction of bulk material when putting into braiding, etc.
3. Generally, the main reasons for the offset of components and parts on PCB circuit board are: the X-Y axis coordinates of components and parts are incorrect when SMT Mounter is programmed, and the material suction is unstable due to the reasons of patch suction nozzle, etc.
4. Damage of PCBA factory during PCBA manufacturing: generally, the main reasons for the damage of components and parts on PCB circuit board during placement are that the positioning thimble of SMT equipment is too high, which makes the position of PCB circuit board too high, the components and parts on PCB circuit board are squeezed during installation, and the Z-axis coordinates of components and parts on PCBA are incorrect during SMT placement machine programming The suction nozzle spring of SMT technology equipment mounting head is stuck.
