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SMT production site design guidelines 1. Infrastructure and power resources The design of the SMT production site must put safety in the first place. Since SMT equipment is generally installed in-line, the length of the production line is relatively long (for example, a high-speed SMT line has a total length of 25m~35m), and the load […]

Analysis and adjustment of temperature curve First, it must be verified that the total time from the ambient temperature to the peak temperature of the reflux is compatible with the desired residence time of the heating curve. If it is too long, increase the conveyor speed proportionally; if it is too short, the opposite is […]

About the setting procedure of the temperature curve The first parameter to consider when making the temperature curve is the speed setting of the conveyor belt, which will determine the time that the PCB spends in the heating channel. Typical solder paste manufacturing factory parameters require a heating curve of 3min~4min. Divide the total heating […]

What is the ideal temperature curve, do you know Before starting the temperature setting, you must have a basic understanding of the ideal temperature curve. Theoretically an ideal curve consists of four parts or sections. The first three sections are heated and the last section is cooled. The more temperature areas of the reflow soldering […]

Temperature curve setting preparation The correct temperature profile will ensure high-quality solder joints. In the PCB assembly using surface mount components, an optimized reflow temperature profile is one of the most important factors to obtain high-quality solder joints. The temperature curve is a function of the temperature applied to the circuit assembly versus time. When […]

The main factors affecting the uneven heating of reflow soldering The main reasons for the uneven heating of the components in the SMT reflow soldering process are: the difference in the heat capacity or absorbed heat of the reflow soldering components, the influence of the conveyor belt or the edge of the heater, and the […]

Do you know how to measure the temperature curve? Source: Dongguan SMT chip processing factory Yitai Electronics, release date: 2019-09-27, browse: When measuring the reflow soldering temperature curve, a temperature curve tester (hereinafter referred to as a thermometer) is required. Its main body is a flat metal box with a socket at one end and […]

How much do you know about the temperature curve Source: Dongguan SMT chip processing factory Yitai Electronics, release date: 2019-09-26, browse: The temperature curve refers to the curve of the temperature of a certain point on the SMA with time when the SMA passes through the reflow oven. The temperature curve provides an intuitive method […]

PCB soldering is poor, reflow soldering SMT products mostly use integral heating reflow welding, rich in far-infrared/hot air reflow welding and vapor phase reflow welding (VPS), etc. The main influencing factor of reflow welding on SMC/SMD is the thermal shock during welding. A reliable heating process must be set during operation to reduce thermal shock […]

Inspection and countermeasures of SMT defective products There are two main phenomena of missing components caused by the placement machine: ①The components are taken away after placement; ②The components fall off due to the movement of the X-YI table after placement. The smaller the ratio of the contact area between the component and the printed […]