While soldering a header socket i sometimes apply too much solder and it flows through, partially filling in one or two of the female sockets holes. Tools and techniques for assembling electronics jepson, brian, moskowite, tyler, hayes, gregory on. This is due either to the preheat being set too low or poor flux application. Youre not boiling off all the solvent deep in those holes or youve got too much flux. Prior to establishing his own consulting company in 1974, he was affiliated with alphamet international, alpha metals, and ibm. The holes narrow the path for heat flow through the metal by simply removing some of the metal, and allow airflow to carry heat away by conve. Learning how to solder w proper soldering techniques is a fundamental skill every maker should master.
If its still not clean, then we recommend you get a tip cleaner. Sanford categories repair and soldering when you heat up your work for soldering and reach the temperature at which solder flows, you are also creating oxides on the surface of your metal that mar its appearance. This article explains when, where, and how to use cleanout holes. This is a desoldering tool set used for clearing the pcb board soldering holes. Check out the wikipedia solder page for an extensive list of the different types. The simplest repair is to fold the lead over to a stillattached copper trace and solder it as shown to. Plating and solder mask shall be of uniform color and finish, holes properly located, markings sharply defined and aligned, and electrical solder termination areas bright and shiny. In this tutorial, we outline the basics of soldering irons, soldering stations, types of solder, desoldering and safety tips. Ebook printed circuit boards incoming inspection guide. Flux pens allow you to dab stubborn components with liquid flux to create better looking solder joints. How to solder throughhole soldering sparkfun education. Hold the soldering iron in your dominant hand, like you would hold a pencil.
Solder poppingout of holes during the assembly process can be caused by outgassing ofmoisture from the pth. During this process, its tempting to touch the solder to the iron tip and then spread it around the lead, rather than let it melt through the heat applied to the lead. If the solder doesnt melt, apply heat for a longer period. It should fill the hole and flow smoothly onto both the solder pad and the pin or component lead. Dont forget to clean solder before and after running through the.
Repairing a lifted pad it may not be pretty, but a lifted pad can usually be repaired. This works well on very small holes as melted solder does not always push out cleanly with metal tools. Using the tip of your soldering iron, heat the old solder until it melts. Alternative to soldering in part is wire wrapping, but wire wrapping not always easy or perfect solution with currently available tools. The printed wiring board is clean and damagefree, with sharply defined conductive patterns. Clean each glass piece of any grinder dust or cutting oil and wrap with copper foil. How to remove solder from a circuit board hole robot room. Here are the basic steps for using a handpowered desoldering pump. The outside diameter of the tip should not cover the pad completely or touch. When you first get into electronics, it seems counterintuitive that you have to expose your circuits to cleaning solutions, but cleaning your pcbs should always be part of your circuitbuilding regimen. Techniques for removing excess solder from pcb holes. Ive been asked about a million questions related to soldering brazing well, thats a huge exaggeration but, it is the subject of many of the questions that im asked and for good reason. Like many good things in life, good soldering is all about timing, rhythm.
With a 116 bit, we drilled holes in the bottom case, under the fans we figured out where the blades of the fan were exposed based on the dust pattern stuck to the inside of the bottom case. Blow holes are caused by trapping solvents in the flux inside the hole. Blowing out i tried to blow with my mouth without any effect. We have experimented with different profiles and different no clean fluxes with no results. Lead to hole ratios are fairly important but not normally a cause for blow holes. There are a gazillion books out there on jewelry making and they are a great way to learn. If we want to remove a throughhole device, we need to first remove the solder from the hole and remove each lead from the device to leave a clean hole that we can then place another device inside.
That process is called a cold solder joint, and the result usually is a bad solder job. Whenever you melt solder, the flux core in the solder burns off. If you need to get excess solder out of holes, try sticking something like a safety pin or needle through to clear out the throughholes. Silver solders are technically better described as brazing alloys, although the basic principles of soldering and brazing are similar, except for the temperature.
First, there are tons of other solder compositions out there aside from lead and tin. Stunning pieces made with sea glass, stones, and crystals by eva sherman, hot and cold jewelr. Unfortunately, the stock bulb tip is fairly wide, making it difficult to access holes near electronic components. It is not necessary to go into this in any detail indeed, it would be difficult to do so in a book this. After heating up the solder, you can use the desoldering pump to suck the solder up and out of the way.
Soldering two pieces of silver together, or repairing a crack in a silver object, requires different materials and techniques than most other metal soldering jobs. Wet the soldering station sponge with the water provided in the lab. How to remove solder from circuit board holes the above techniques work on surface mounted components, but throughhole soldering requires a much different approach. Even if you already have a soldering work area set. If needed, circuit boards should be cleaned prior to soldering and component removal operations. My favorite technique is to use a desoldering bulb to suck out the excess solder. Profusely illustrated, this book by the worlds top solder educator has been the leader in its field for two decades.
Never melt the solder against the iron tip and allow it to flow onto a surface cooler than the solder melting temperature. The after is to remove the flux, which is mildly acidic. Ensuring a clean solder joint at every stage in the soldering process, its essential to avoid contaminants. To clean holes that have solder in them, strip a half inch section of stranded.
Its a sort of dance where you have to get the sequence and the timing just right. In both cases, a check on the process parameters should eliminate the problem. And, like dancing, as you learn, you will go from feeling like a fumbling klutz to joyfully finding your groove. How to best clean out a solder hole after desoldering.
The less solder needed to fill the gap, the less likely you are to have shrinkage porosity in the joint. Solder vacuum solder sucker is a great tool for removing solder left behind in through holes when delsodering components. Desoldering hole with soldering iron and desoldering bulb. If the soldering process is functioning correctly, when the hole out gasses the solder tends to shrink back into the hole to fill the void. How do i repair this soldering over worn pivot holes. Check out this video for one procedure which works every time for me. How about making your friend or loved one a custom pair of sterling silver e. How to clean sheet and wire solder cut or uncut tip. There are allpurpose, heavy duty, no clean, rosin and watersoluble flux. There are several effective methods for removing solder from a pcb hole. Lifted pads are especially common on boards with thin copper layers andor no throughplating on the holes. The contacts should be clean enough to pass through the solder pad holes. How do i repair this soldering over worn pivot holes nawcc.
Clean rooms and associated controlled environments part 1. If you ever need to heat that solder again, you need to add flux first. Mar 01, 2001 get the latest developments in solder technology you cant work in electronics without solder and you shouldnt work with solder without solders and soldering, fourth edition. Selective soldering troubleshooting ddm novastar learning. Soldering metal requires flux, solder, heat and of course metal. A desoldering pump, also called a solder sucker, vacuums up melted solder to.
I find that sucking out the solder with a desoldering bulb and then drilling out any remaining solder is. When they hit the wave, the solvents boil rapidly and expand. Wipe the tip of the soldering iron on a damp wet sponge to clean it. Whether youre building a robot or working with arduino, knowing how to solder will come in handy. You can push the terminal with the soldering iron tip at the same time to help free the component as the old solder melts. Previously, i described a number of methods for desoldering pcb holes. Heat up the solder you want to remove with a soldering iron some desoldering pumps also come with attached irons. How to clean the solder from plated pcb holes youtube. Remember to clean the tip like this before each connection you make the tips oxidize quickly. And while it baked, we decided it was time to break out the bigger guns. Aug 10, 2016 10 top tips for working with printed circuit boards. Here i am going to show you how to clean up solder from two points on a logic board. Hold the soldering iron in one hand and solder in the other.
Here are our top 4 tips on how to solder silver to copper. Let it cool once enough solder has been added to the joint and it has flowed well onto both the component lead and the solder pad, remove the iron from the joint and allow it to cool undisturbed. Pushing out i had no thin solid wire here, so i added a little extra solder and heated the via while pushing in the new capacitor from the opposite side. For top results ensure your tips are in top condition. Icstation stainless steel soldering hole tip cleaner desoldering tool set 0. Flux helps clean the surface and allows the solder to flow better by improving the wetting characteristic of the solder. The before is to be sure the pads are clean of any oils or films. The article below was something that i was asked to put together by some of the ford truck enthusiasts forum members to add to a number of group tech articles. There is probably, no other technique, that causes as much fear, uncertainty and confusion, as soldering. Most jewelers know how to solder a joint closed, as well as join parts together, but if asked what is happening in the process, few are able to provide a good explanation. If you want to combine 2 wires, you can easily use.
Jul 20, 2012 this video was uploaded from an android phone. Soldering is probably the most commonly used and least understood operation performed in the jewelry industry. Solder applied to a cleaned, fluxed and properly heated surface will melt and flow without direct contact with the heat source and provide a smooth, even surface, filleting out to a thin edge. Usually, the clog is residual solder that occurs when an existing electronic component is desoldered and removed. I do this for each of the pins until all the vias are clear of solder. Slot the pins through the pcb holes and solder as normal. Soldering throughhole technology components throughhole components are commonly used by the makers and differs from smd. Plug in the soldering iron, turn it on, and let it warm up for 23 minutes. I took a classic car restoration course at the thames valley university last year and part of the course covered traditional lead solder filling. How do i repair this soldering over worn pivot holes page 2. How to clean up solder from connections ifixit repair guide.
Second, solder comes in a variety of gauges, or widths. How to remove throughhole components soldering youtube. Use an old soldering iron if you have one, since pushing with the iron can wear the iron down. Ensure that it is clean and shiny before soldering and you can achieve this by cleaning it on the sponge. Heat the solder joint and pull out the pin with pliers on the other side. Afterward, flux residue can be removed from the solder joint with commercial flux removers. Tip tinner is a chemical paste used to clean the tip of your soldering iron. The purpose of the soldermask is to mask off and insulate. Clean the tip of the soldering iron and tin it with solder. One of the most important things to keep in mind when youre learning how to solder copper and silver together is to keep your metal as clean as possible. Howard manko teaneck, nj is an internationally recognized authority on soldering and cleaning with more than 35 yars experience in the field. Sometimes worked but this thing has two legs and i have only 1 soldering iron. Do i keep the soldered pieces as a part of the movements historyor clean all that solder and metal pieces off and rebush.
Wave soldering defects epec engineered technologies. Remove excess solder from plated holes using a vacuum desoldering tool. Check out tangents desoldering tutorial, i just watched it yesterday and there were a few techniques i havent thought of. It is a mixture of the flux in the solder, and powdered solder. Prepare your component for soldering by removing any excess solder from the contacts. Solder sucker desoldering tool is the preferred method for holes. Keep heating the solder and allow it to flow into the joint. You can start by cleaning the piece in an ultrasonic before soldering. If you are using a propane torch i suggest you get a mapp gas torch. Ordinary soldering irons are not costly and you can try.
How to solder and desolder connections ifixit repair guide. Nov 07, 2018 if we want to remove a throughhole device, we need to first remove the solder from the hole and remove each lead from the device to leave a clean hole that we can then place another device inside. Aside from choosing leaded or leadfree solder, there are a number of other factors to consider when picking out solder. In reinforced masonry construction, cleanout holes are the openings through which mortar droppings and other debris are removed and a wall is inspected prior to highlift grouting. The flux acts as an agent to clean oxidation from the surface of the metal so that the melted solder can flow. Sunken solder joints on the base of the board may be caused by outgassing. The solder has not fully filled the plated through hole in figure 1. Since some residual solder may remain inside the hole, pull with tweezers or pliers.
Well go over how to use this tool a little later in the tutorial. The slap method for throughhole rework sparkfun electronics. You may be able to use sandpaper to clean it out after it is cooled. Professional reflowsoldering equipment and printable solder pastes became commercially available by the early 1970s, when smds had begun to be used on conventional circuit boards.
I place my sheet solder on a charcoal block and gently heat it. Wave soldering defects inconsistent or poor hole fill. Soldering is one of the most needed skill in the world of electronics. How to clean flux residue after soldering our pastimes. Cleaning can be achieved with a mild abrasive andor the application of ux. Apply a small amount of solder at the junction of soldering iron tip and lead to make a solder bridge. Fortunately, you have several useful pcb hole desoldering options, regardless if you want to remove a component or want to remove any excess solder. In this case i am working on a chinese a all winner tablet and i am cleaning the solder points for the battery so i can correctly install a new battery on the logic boar. Soldering involves melting a lowtemperature metal alloy over a joint or wire splice to secure 2 pieces together without the risk of them coming undone. Sunken solder joints can be caused by incorrect preheat or poor fluxing when seen on the topside of the board.
Try not to handle your solder too much and if you must, wash your hands often and avoid touching your face as that prettyhandsome mug of yours is full of oil glands, while your hands are not. After the solder is applied, hot air knives blow off the residual solder, clean out the holes and level the solder down to the required height. Component and board markings are clear and legible. Problems with blow holes we are having problems with what appear to be blow holes on one particular part of an assembly we run frequently. Clear solder from brass fitting terry love plumbing. This instructable will demonstrate how to solder sterling silver rings using a torch, silver solder, and various other tools to create a pair of sterling silver earrings. Heat the solder until it liquefies, put the duster straw right above the solder and quickly hit the melted solder with an air blast to instantly clear the hole of solder. Soldering 101 the 4 steps for successful soldering. This pcb rework and repair guide has been downloaded from the intertronics website. Populated plated through holes pth should exhibit a vertical solder fill of 100%, with a fully formed. Place the soldering iron tip at the junction between the pad and component lead. And you want to clean the board before you populate. Surgeon grade rework and repair, by the book and guaranteed.
Common soldering problems adafruit guide to excellent. Kester flux, no clean solder are available at mouser electronics. Pin holes or blow holes are caused by the circuit board outgassing during soldering and. See figure 1 note the size of the solder is important when soldering small components. When it is cooled off use a 1 stainless brush to clean out remaining solder. Tips on how to master soldering ganoksin jewelry making. Could the cause be due to an improper ratio of the lead to the hole. Fill holes in the uchannel with solder by dabbing small amounts at a time. Never use water soluble unless you are using a dishwasher to clean the boards. For those interested in removing the flux residue, isopropyl alcohol ipa is required. If the tip is nice and silvery and shiny, you can make good connections. Assemble pieces together on a flat, heat resistant surface.
Pin holes and blow holes on a pcb wave soldering defects. Please visit us for all your rework and repair needs. I agree with this some of the smaller holes can be welded up using this technique use brass on one side and weld on the other like said above make sure the surface is clean and go to town grind down smooth and youre good to go i did this to the many smaller holes in my driver floor yet had to cut out and replace another section entirely gotta use some judgement on what you think. Icstation stainless steel soldering hole tip cleaner. Begin by making sure the tip is attached to the iron and screwed tightly in place.
Heat the wire as you slide it into the solder joint, and it will clean the entire hole in one sweep in and out. The making of a good soldered joint needs the right amount of solder, flux, and heat, in the right place, and at the right time. I dip the braid in the paste, then use that to transfer heat to the solder stuck in the through holes. To clean holes that have solder in them, strip a half inch section of stranded wire 2226 awg for these holes, and use it as a thin solder braid. Get the latest developments in solder technology you cant work in electronics without solder and you shouldnt work with solder without solders and soldering, fourth edition. Unfortunately, the vacuum action of the bulb also removes the solder from the tip of the soldering iron. This is typicallyfacilitated by substandard plating in the holes that allows moisture trapped inthe substrate to outgass through the plating into the barrel when the solder istrying to wet and take hold. Methods for removing solder from inside a header socket electrical. Flux is highly recommended when soldering surface mount or castellated components. Jan 30, 2012 heat the solder joint and pull out the pin with pliers on the other side. To prevent damage and to allow for maximum transfer of heat to the next clogged hole, regularly reapply a coating of fresh solder to the tip of the soldering iron. Youll learn 29 different methods for soldering and heating for both automatic and manual. In order to do so, well be using the solder sucker. Boards shall be clean and damagefree, with sharply defined conductive patterns.
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