Guangzhou wave plant, Guangdong best wave soldering manufacturers, wave soldering plant in Dongguan, Shenzhen wave soldering manufacturers, Zhongshan wave plant, Foshan wave soldering manufacturers, professional wave soldering manufacturers, the Friends of automation brand wave soldering. Defects and Countermeasures wave solder balls PCB preheat temperature is too low or too short warm-up time, the flux of solvent and water does not evaporate, causing the solder spatter welding. Preheating temperature increase or extend warm-up time. Welding end components, pins, PCB pads have oxidation or contamination, or PCB moisture. Component first come first use, do not store in a humid environment, do not exceed the prescribed use date. Cleaning of printed boards and to deal with the influx. Welding ends stomatal components, pins, PCB pads have oxidation or contamination, or PCB moisture. Component first come first use, do not store in a humid environment, do not exceed the prescribed use date. Cleaning of printed boards and to deal with the influx. Solder contamination exceeded, AL content is too high, long and short joints. Replace solder. Solder surface oxide residue pollution. You should clean the residue after the end of the day. PCB ramp angle is too small, is not conducive to the flux exhaust. PCB ramp angle of 3-7 ° wave height is too low, is not conducive to the exhaust. Crest height control in general 2/3 PCB thickness. Cold welding of belt vibrations by external influences upon cooling, the solder disorders. Check whether the motor is faulty, check the voltage is stable. Conveyor for foreign objects. Soldering temperature is too low or belt speed is too fast, the viscosity of the molten solder is too large. Solder joints wrinkled. Solder wave temperature of 250 ± 5 ℃, soldering time 3-5s. When the temperature is slightly lower, slower conveyor speed should be adjusted. Tin wire PCB preheat temperature is too low, due to the low PCB and component temperatures, contact with splashes of solder paste crest surface formed in the PCB. Preheating temperature increase or extend warm-up time. PCB moisture. De tide of PCB processing. Solder mask rough, uneven thickness. PCB to improve processing quality. Eight, the machine choice based on price and yield, wave soldering machines can be divided into three categories. 40,000 to $ 55,000 can buy an entry-level, low or medium output vertical machines. Although there are cheaper desktop models, but these are only suitable for use in research and development or prototyping of applications because demand for manufacturers to adapt to growth, they are not enough by the use. Typical of such machines which output belt speed of about 0.8 m / min to 1 m / min, using a flux spray or a foam-type coating apparatus. It may not have convection preheater, but most vendors offer both single wave and double wave performance machines. 48,000 to 80,000 yuan can buy a machine production Taichung, preheating zone about 1.22 m to 1.83 m, the production rate of about 1.2 m / min to 1.5 m / min. In addition to dual wave as standard, but also it provides more advanced configuration, such as an inert gas environment. In the high-end market, with 95,000 to 190,000 yuan to buy high-yield machinery that can run 24 hours a day and with little human intervention. Generally use 1.83 m to 2.44 m length of preheat can get or higher yields 2 m / min. It also includes many advanced features, such as statistical process control and remote monitoring devices, and both spray, foam type have the formula peak flux coating machine in the same system, there may be three additional peaks performance.