Characteristics of pen shaped and pointed electric soldering irons
1. Pen shaped electric soldering iron
This type of electric soldering iron is generally pointed, with two types: adjustable temperature and non adjustable temperature.
Its characteristics are: low price, suitable for welding plug-in components, non adjustable pen shaped electric soldering iron, which oxidizes with prolonged high temperature and no longer tins on the tip.
For LQFP and TSSOP packages, pointed electric soldering irons are generally difficult to use and cannot be replaced with knife edge soldering irons, which have significant limitations.
It is only the welding of plug-in components, and harmful electric soldering irons can be used for some simple welding needs.
2. Pointed electric soldering iron
Welding stations are generally temperature adjustable, and some are equipped with Heat gun. The original configuration was a pointed tip, but due to structural compatibility, it can be replaced with a blade soldering iron head.
When using a pointed electric soldering iron, the welding temperature of general electronic components can be adjusted to around 350. When there is a fan heating design on the PCBA, the temperature can be adjusted appropriately to ensure that the temperature can melt the tin on the PCBA.
Due to the effective bonding between the tip of the soldering iron and the pins of the SOP/TSSOP/LQFP package, it is easier to handle during tin removal.
Experience in selecting electric soldering irons, selection techniques for soldering tin and flux
1. Selection of electric soldering iron
The power of an electric soldering iron is determined by the size of the solder joint. The area of the solder joint is large, and the heat dissipation speed of the solder joint is also fast. The selected electric soldering iron should have a higher power.
The power of a general electric soldering iron includes 20W, 25W, 30W, 35W, 50W, etc. Generally, a power of around 30W is selected.
Tin on electric soldering iron:
The newly purchased electric soldering iron needs to be tinned before it can be used.
After long-term use, a layer of oxide will be generated on the head of the electric soldering iron, making it difficult to eat tin. You can use a file to remove the oxide layer, and after the soldering iron is electrified and the head is slightly hot, insert rosin and apply soldering tin to continue using it.
2. Solder and flux
When selecting solder and flux, low melting point solder wire is generally used, and non corrosive flux such as rosin is chosen. Industrial solder and corrosive acidic solder oil are not recommended, and solder wire containing rosin is generally used.
