Are You Making These Mistakes?
Don’t worry, I made all of these mistakes myself. And sometimes it still works. But by correctly learning the welding technique, you reduce the chances of operating errors in your circuit, due to bad welding.
Note: in French, there is confusion and amalgamation between welding and brazing. In electronic wiring, it will always be the soldering process even if the term soldering is used.
1: Removing The Iron Before Applying The Solder
When I teach someone how to weld, I usually say that you have to heat the spindle and the pad first and then apply the solder.
But sometimes my explanation is not clear enough. I have seen students heat the pad and pin, then remove the soldering iron before trying to apply the solder.
Unfortunately, this cannot work well. When you remove the iron, the pad and the pin cool down quickly; the solder cannot melt.
2: Heat Only The Tablet
Another common mistake is to only heat the pellet. The person heats the patch, then applies the solder. But since the component spindle has not been heated, the welding does not take place with the spindle.
You will have the same connection fault if you only heat the component’s tab. You will get a drop of solder which will “float” above the patch.
3: Cut The Component Leg Too Short
To have a circuit that looks clean and pleasant to look at, I have seen students push the components as far as possible into the holes, then cut the tab so that it does not protrude from the board.
This makes it difficult to weld the spindle. The cabler then ends up with a solder covering the hole but, which is not actually connected to the pin.
4: Use Of Too Little Solder
Some beginners are afraid to use too much solder, so they deposit too little. The amount of solder is not necessarily the most important point, but it is generally preferable to apply a good dose of solder from the start.
You will thus obtain complete soldering which will ensure a correct connection of the assembly.
5: Fear Of Overheating The Assembly
The circuit can support more than it seems. I have seen students worried about overheating the circuit. They, therefore, try to solder the assembly in less than a second to keep the card out of possible overheating. Today we use lead-free solder (tin, silver, copper) and the melting temperature is 217 degrees Celcius.
It is certain that you can damage the components if you heat them too long, but that’s not the thing to worry about at first.
It is, therefore, necessary to heat the component chip assembly correctly (with a fault at 350 ° C).
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