Why is the soldering iron tip not tinned at 380℃?
It is absolutely impossible to solder the iron tip at 380℃ without tin.
So why do some customers report that the soldering iron tip cannot be tinned when using the 936 soldering station for lead-free soldering at 380°C? First of all, this 380°C was measured under a static condition, but the actual temperature is not such high at the moment of welding. Let me use the HAKKO936 soldering station as an example and everyone will understand.
Taking the HAKKO936 soldering station as an example, let's look at the relationship between temperature and welding speed in leaded and lead-free soldering:
Welding wire type melting point welding temperature welding speed
6337 welding wire 183℃ 350℃ about 4 seconds/piece
Lead-free soldering wire 220℃ 390℃ About 6 seconds/piece
Our normal welding speed is 3-4 seconds per soldering point, while the HAKKO936 soldering station performs lead-free soldering at 390°C for about 6 seconds per soldering point. The domestic 936 soldering station takes even longer. Different soldering stations have different temperature compensation capabilities. The faster the better. The domestic 936 soldering station has poor temperature compensation capabilities and the temperature is not reached during normal welding. Therefore, some customers reported that the soldering iron tip was not tinned when using the 936 soldering station for lead-free soldering at 380°C.
Common faults of soldering irons
1. The electric soldering iron does not generate heat after being powered on.
If the soldering iron does not heat up after being powered on, it means that the soldering iron has an open circuit fault. This fault may occur at the plug of the soldering iron in several places. The soldering iron core is broken, the lead of the soldering iron core is disconnected, and the power cord of the soldering iron is disconnected.
2. The soldering iron head does not eat tin.
The soldering iron tip does not eat. "Xi Pu saw that the newly purchased soldering iron tip was used directly without being repaired, resulting in the soldering iron tip not being tinned. The soldering iron tip used for a long time was not tinned, and the soldering iron tip was burnt and needed to be repaired.
3. The soldering iron is charged
A charged soldering iron is very dangerous for welders and may lead to serious electric shock accidents. Therefore, once the soldering iron is found to be charged, the power supply should be cut off immediately for inspection. There are several reasons why the soldering iron becomes electrified: the power cord of the soldering iron is connected to the terminal of the ground wire; the power cord falls off from the terminal of the soldering iron core and then touches the screw of the ground wire, causing the electrified power lead of the soldering iron head to become entangled and cause leakage; The power ground wire itself leaks electricity.
4. Pit appears on the soldering iron tip
When a soldering iron is used for a period of time, pits or an oxidized corrosion layer will appear on the soldering iron tip, causing the shape of the blade surface of the soldering iron tip to change. When encountering this situation, you can use a file to remove the oxide layer and pits, file them into their original shape, and then plate them with tin, and you can reuse them.
