Notes

The Basics of Soldering and Soldering Stations
Learning to solder is an indispensable skill every maker should hone. An effective soldering technique will save time and effort in troubleshooting bad joints in the future.

Soldering stations comprise of a control unit into which is plugged a low-voltage soldering iron; such units typically feature digital displays and multiple temperature settings for optimal use.
Soldering Iron

Soldering irons work by heating to an extremely high temperature, melting solder into liquid form and joining components together. While standalone soldering irons may be available, a soldering station offers greater control and convenience.

Start by placing the tip of your iron on the area where you intend to solder and waiting for it to warm up to its proper temperature. Too high of temperatures could damage what you are working with while too low will not form an effective connection between components.


Once your iron is hot, apply it to the soldering pad and begin feeding in your chosen amount of solder. Keep in mind that different types of solder come in various diameters; once finished feeding in, remove your iron and wait a second or two for it to cool before taking action - an ideal solder joint should look shiny with an "volcano"-esque appearance; otherwise reheating and feeding additional solder could be needed for completion.
Soldering Flux

Soldering is the practice of joining metal surfaces together using molten alloys known as solders, or solder. Solder is heated until it forms an intermetallic bond with any surfaces it comes into contact with and forms an intimate intermetallic joint between them, creating a strong connection. Impurities or oxides on metal surfaces can hinder this bond forming process - to remedy this situation solder flux is used to remove oxidation and increase wetting.

Flux is typically made up of chemicals like rosin or organic acids and comes in the form of paste or liquid that can be applied directly onto metal surfaces before being heated up for heating purposes.

When selecting the ideal flux for your soldering application, it's essential to take into account soldering temperatures, environment and cleaning requirements as well as any regulations which may pertain to your business. Some electronics-grade fluxes are non-corrosive and don't require special cleaning methods after soldering - while other require chemical flushing afterward to eliminate residue on components after soldering has taken place.
Solder Joints

Soldering is a technique in which molten filler metal is used to join heated base materials together, similar to welding but at lower temperatures; this helps lower heat stress on components.

To ensure a good solder joint, it is imperative that the parts you are working with are clean. Otherwise, soldering robot may have difficulty applying enough heat to them and melting the solder properly.

Use of the proper flux will help prevent re-oxidation and facilitate wetting to begin capillary action, aiding in residual oxide removal.

Applicating just the right amount of solder is an art that only comes with practice. Too much will cause short circuits between adjacent joints; too little may not support components properly or seal completely. Visually, an ideal solder joint should be free from defects like dents, looseness, grittiness and untightness; its surface should also be smooth and shiny.
Desoldering Pump

Desoldering is a vital skill for electronic circuit designers to master. Be it to repair or replace components, troubleshoot production issues, salvage parts for future projects or remove and install parts without damaging the overall board or circuit, desoldering allows you to safely remove or add pieces without disrupting their overall functionality.

Desoldering pumps work by applying heat to melted solder, which allows the tool to vacuum up the excess solder. There are various styles of desoldering pumps on the market; two examples include plunger-style and bulb designs - both are effective, though each may perform differently.

Before beginning with a desoldering pump, apply heat to the soldered joint you want to unsolder. Position the tip of your tool against any melted solder and press down on it using either its plunger or your finger (in bulb-style pumps). Pull the trigger to activate your desoldering pump and allow it to pick up molten solder. Repeat this process until all solder has been removed from its joint.

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