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Know the type of soldering iron head used by the soldering machine, then directly select the corresponding type. When the type is not confirmed, the type can be confirmed by the following methods:

1. The size of the distance between the points is appropriate, and there are regular points. We should choose the welding type of pull welding. In the use of R type of soldering head, is generally inclined, there is a certain point of view, rather than straight up and down; When using D type of soldering iron head for pull welding, it is generally straight up and straight down.

2, about welding FPC soft plate and other products, should choose PC or FPR type of soldering iron head in short, there are many kinds of shape of the iron head, the general principle is to choose what type of welding products, otherwise it is very simple to form the rise of solder joint defect rate.

3, about the distance of the point is relatively large, or the placement of irregular solder joints, we are generally a point a point of single point welding, also known as spot welding, suitable for this type of iron head type D or DV, especially as the plug-in type of electricity meters, are inclined to choose this type of iron head.

4, when the same product on the same machine needs spot welding and pull welding together, we generally tend to choose R or D type iron head, so choose R or D type welding, depending on the distribution of solder joints and the distribution of components around the solder joints to determine.