How To Remove Solder From A Circuit Board

On How To Remove Solder, Removing solder from the circuit board can be a challenge. You can too leave the solder in that location, of form. Unless the solder creates short circuits or structural problems, you lot can heat the solder until it melts and and so pushes your components through. The solder volition notwithstanding piece of work. You will even get a connection to it.

Nonetheless, if the old solder will cause problems, you take no selection but to remove it. Fortunately, y'all have several options for removing this solder, and each one requires some tool.

This guidance volition show you how to remove it; I hope it will be helpful.

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How To Remove Solder From Circuit Lath

Regardless of your project, you accept several ways to remove solder from, or desolder, your circuit board. These ways range from auto-powered tools to manual, but they will all practise the job. For most DIY projects, you only need a desoldering pump and complect.

At that place is likewise a solder wick. Beyond those, there are methods for more than specialized tasks and contexts. Either style, tool choice frequently comes down to purely personal preference.

i.one Choose a Desolder Method

Regardless of the tool, desoldering comes downwards to only a few elementary methods. They all have advantages and disadvantages. Often, the way you choose comes down to what y'all are desoldering, how big it is, and where it is.

1.1.1 Grinding and Scraping

Your basic desoldering techniques are grinding and scraping the solder away. These techniques will take some time, but they will work most of the time. Plus, you simply need a knife, scraper, or pick.

These techniques are also the virtually controlled and organized. The trick is all in your technician skills. Fatigue is the only drawback. Because of this, nigh people reserve grinding to the final surface preparation steps.

i.one.2 Machining and Milling

While you lot volition want to fit your milling motorcar with a microscope for precision, y'all can drill away the solder mask from the circuit board. Milling out the solder volition take much less time than scrapping, merely it requires high levels of skill and experience.

The drill chip can dig into the PCB itself, damaging it in the procedure.

one.1.iii Chemical Stripping

This technique uses a liquid chemical solvent you must apply with a brush or swab. It would help if you only used this technique to remove solder from copper plates or solder surfaces.

Even then, you still want to apply masking tape or some other protective material to protect your circuit. The solvent breaks down the solder like a pigment stripper, but information technology will deteriorate the base cloth if you allow it.

one.1.iv Microblasting

If you must remove solder from a large surface expanse, then y'all want to micro-blast your PCB.

This technique uses modest bench-top systems that propel annoying materials at the target area through a pencil-shaped handpiece, which must be flushed away after application. This annoying material blasts away the coating.

How To Remove Solder From Circuit Board Holes

The above techniques piece of work on surface-mounted components, only through-pigsty soldering requires a much unlike approach. Fortunately, you have several helpful PCB hole desoldering options, regardless if y'all desire to remove a member or wish to remove whatsoever backlog solder.

2.ane Desoldering Bulb, Pump, or Solder Sucker

Also called solder suckers, desoldering bulbs are the most popular method for removing solder from circuit lath holes. Afterward securing and preheating the PCB and void in a vice or PCB holder, you suck the solder off the board by squeezing and releasing the bulb from backside the hole.

To prevent damage to the lath, y'all should re-solder your soldering iron at present and so, as the technique will remove solder from it likewise.

You can likewise get these tools with or without the rubber seedling. In these desoldering pumps, a plunger replaces the bulb, but their operation is identical.

ii.2 Drill

If you cannot use a bulb for any reason, you lot can attempt removing the solder from your circuit board holes with a drill or pin vise.

Drilling is another standard desoldering method, but y'all must employ a small enough carbon, cobalt, or high-speed steel bit, as well-nigh PCB holes are 0.029 inches in diameter. Oversized bits will remove the tracing within the hole, damaging the board.

2.iii Desoldering Complect/Wick

No longer in everyday use, some technicians still swear by the good quondam desoldering braid. These ropes of tiny woven copper wires wick upwardly whatsoever nearby solder once heated. Yous place a new braid on acme of the hole or solder then apply oestrus until saturated to use the complect.

2.4 All-in-ane solutions

Also the to a higher place methods, you can find a few combo units. These tools meld a desoldering tool to a soldering fe. You tin can get them with either a desoldering bulb or plunger. These tools let you desolder while keeping i of your hands-free.

Y'all tin can fifty-fifty find fully electronic versions of them that will automatically suck the solder for y'all. In that location are too a few models dedicated to removing solder and nothing else.

How To Remove Solder Without Wick

The techniques mentioned above are the most mutual ways to remove solder from a circuit board, simply they are by no ways the only way to exercise it.

Later on stripping off whatsoever insulation and twisting the wires together, you follow the standard procedures for using solder wick. For example, you practise not need an actual wick. Information technology would help if you had anything that will blot molten solder. Any fine stranded wire will do, such every bit onetime CAT5 Ethernet cabling.

If you demand something more efficient, yous tin dip your homemade wick into solder flux before using it.

If you lot do non have whatsoever stranded cabling around, you can employ some thin rod to push out the solder instead. You button the rod through the hold while heating information technology from the other side, and the rod takes care of the residual.

To prevent soldering the rod instead, yous want something that does not readily fuse, such as carbon pencil lead, stainless steel, or wooden toothpicks.

How To Remove Solder Without a Soldering Iron

Up to now, nosotros presumed that you lot have a soldering iron and know how to apply it. Notwithstanding, what should yous practice when you do non? For virtually of these techniques, you practise not need an iron. While they do brand solder work more than comfortable and faster, but they are never necessary.

A soldering iron is trivial more than a heated piece of metal. Thus, yous can substitute it with any other wild slice of metal. Two long, flathead screwdrivers with a propane torch are perfect for this.

Generally, you will have one to use a screwdriver you do not mind discolored, and another one you lot manage covered in solder.

From there, you accept to heat your fe-replacement screwdriver until information technology turns red, then use it as you would utilise whatsoever other soldering fe. Yous want to do this close enough to the soldering area so you can use the screwdriver before information technology cools off.

Molten solder should adhere readily to a cold screwdriver. You use the other screwdriver every bit a wick. Practise not use your screwdriver wick to pick or chip the solder, as this can damage your PCB and components. You lot tin can heat the screwdriver to clean off the solder.

How To Remove Old Solder

It becomes increasingly challenging to melt as solder ages, specially with an essential soldering iron and solder sucker. However, the bang-up affair about solder is that it hasn't inverse since its invention.

Sure, the materials nosotros use accept changed to make better connections, only modern solder melts the same way sometime solder did. That is too how yous remove erstwhile solder too. You utilise a new solder layer, and somewhen, the heat will melt the old stuff underneath.

You and so remove information technology with any of the desolder techniques mentioned above.

How To Remove Solder Flux

Depending on the solder you lot use, yous may encounter a flake of flux build upwardly around your soldering area. This flux is harmless mainly to leave it there, but you lot can make clean it off with a simple technique.

How this technique works volition depend on your solder and flux, so you will want to check the manufacturer'southward documentation. Some DIY experts say y'all tin utilise isopropyl booze or distilled water to remove no-make clean change, but that comes with risks.

Yous tin also apply ane of the many chemical cleaners for flux on the market. They all come in aerosol cans like hairspray or shaving cream.

After spraying the flux expanse, you tin can utilise a strong brush and a set of dental picks to clear the flux out of the cracks and crevices. In one case you are done, you can utilize a cotton swab to dry up any remaining cleaner and alter.

Yous can echo the process until you remove everything, going as far as using compressed air as needed.

Determination

While most former solders will not damage your PCB or circuitry, at that place are times when you want to clean your excursion lath of solder thoroughly. To remove solder, you must use a desoldering tool in conjunction with a soldering iron.

Once you have all your tools gear up, you lot can beginning removing the solder from your boards and components. If y'all need help choosing the right desoldering tool for your project or instructions on using information technology, please feel free to contact us.

Source: https://www.wellpcb.com/special/how-remove-solder.html

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