1, solder paste refrigeration
The solder paste has just been bought. If it is not used immediately, it should be placed in the refrigerator for refrigerating. The temperature is preferably between 5 °C and 10 °C, not below 0 °C. There are many explanations on the use of solder paste. There is not much to introduce here.
2, timely replacement of the placement machine is easy to lose goods
In the placement process, due to the aging of the placement machine equipment and the damage of the nozzle and the feeder, the placement machine is liable to stick, and high throwing occurs, which reduces production efficiency and increases production costs. In the case where the placement machine cannot be installed, it is necessary to carefully check whether the nozzle is clogged, damaged, and whether the feeder is intact.
3, measuring the furnace temperature
The quality of PCB board welding has a great relationship with the reasonable setting of reflow soldering process parameters. Generally speaking, the furnace temperature test needs to be carried out twice a day, and the minimum is also measured once a day to continuously improve the temperature curve and set the temperature curve that best fits the welding product. Don't miss this link for the efficiency of production and cost savings.
There are still a lot of specific precautions for Pcb assembly. I won't introduce them here, I hope to help you.