We can check step by step by following these steps:
1. Check the wire feeding speed of the
tin wire. Under normal circumstances, the wire feeding speed should be less than 60mm/s. If the wire feeding speed is too fast, the tin wire may be pushed to the PIN before it can be melted, which may easily cause tin blocking.
2. Check whether the position of the tin wire feeding point is correct. When the welding head touches the solder joint, if the tin wire feeding point is too low, it is very easy to reduce the tin wire and send it to the PIN, resulting in tin blocking, so we should try to send the tin to the PIN. Solder the head, and let the tin flow along the head to the pad.
3. Check whether the solder parameters are correct, including tin feeding method, solder temperature, etc. Generally speaking, a slight increase in temperature can make the tin wire easier to melt, thereby reducing the risk of tin blocking. In addition, if the solder joint absorbs heat very quickly, the temperature supply at this time is particularly important. It is much better to send tin in advance and then down to the solder head than to send tin for interpolation.
4. Check the wire diameter of the tin wire. Excessive wire diameter of the tin wire is also a common cause of tin blocking. Because of the different manufacturers or models of the automatic soldering machine, the size requirements of the tin wire diameter are also different. It is best if the wire diameter of the tin wire is slightly smaller than that of the tin feeding channel.
3.Regularly replace the tin feeding roller or blade. Under the use of the machine for many years, the hardware will inevitably wear out, and the wear and damage of these hardware will also increase the risk of tin blocking.
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