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What would you do if you had a soldering station? You could most likely fix your broken radio or put in some new pickups in your guitar. Then again you could most likely start your own mini soldering business. All of these things sound great but if you want your soldering to come out looking great then you need a quality soldering iron. If you get a cheap soldering iron odds are that you might do more harm than good. So here is a review of inexpensive soldering irons that have potential.

Weller WESD51 Digital Soldering Station with Power Unit, Soldering Pencil, Stand, Sponge

This soldering iron can do just about everything. If you need fast quality production then this is most likely for you. If you have things that need to get reworked for better soldering then this machine claims to be able to do it. This solder station can also be useful for multi layer boards.

Another great feature of this Weller station is that you can set it at a certain temperature and it will never rise from that temperature. This is very important when soldering fragile things because you can end up burning them. If you happen to leave the station on then there is no need to worry because it will automatically power down after 99 minutes of inactivity.

Weller WLC100 Soldering Station for Hobbyist and Do-It-Yourselfer

If you are into individual projects or soldering is just a pastime that you enjoy then the Weller WLC100 is made just for that. It is very easy to use and it includes a simple on and off switch for simple activation. This Weller station can produce anything from 5 to 49 watts of power. The pencil iron in this machine is top quality and very light weight. It is made for accurate welding points so that you will never miss a spot.

As you can see, there are many kinds of soldering stations to get. If you want the best soldering station then you need to get one that will meet your needs as far as the type of soldering that you do.

Many of us have experienced the frustration of running an assembly on two different wave machines and seeing two very different board qualities emerge. Why do your wave machines produce different results when both are set at the same pump speed, conveyor speed, conveyor angle, solder pot height, preheat and solder temperature, are using the exact same chemistry, have the same maintenance schedules and show the same thermal profile?

As an industry, we have often retreated to accepting that “different wave solder machines have different personalities.” Others blame operators. Yet the answer is often simple and measurable: All wave machines produce waves that are different shapes.

Limitations of Machine Set-up

What this all means is that in order to control your wave process you need to directly measure what your board actually experiences in the wave. Wave machine settings can never assure repeatability. Your board does not see a conveyor speed; it does experience a dwell time. Likewise, your board does not know your pump speed; it experiences an immersion depth. Also, your wave machine settings do not tell you the wave machine’s variability. Therefore, parameters for wave soldering must be based primarily on guidelines for board-wave interaction, not wave machine settings.

Assembly plants need no longer blame their wave solder machines, flux or personnel when their real challenge is the wave solder process itself. Your wave machine does not even purport to measure your board-wave interaction.

Good equipment does not compensate for uncontrolled process. The best wave solder equipment in the world still requires a sound approach to process optimization and control.

Dwell Time Baseline for Study

A major consumer electronics company tasked one of its North American facilities to perform a month-long study to assess the significance of dwell time optimization and repeatability. The assembly with the greatest volume, representing 19% of all the boards produced at that location, was selected for the study.

For this purpose, the Wave Solder Optimizer was used as direct board-wave contact sensors are necessary for meaningful data. Capable of performing four runs in a row, the device offered the convenience of taking multiple readings before downloading the data to a PC. Also, the Optimizer’s LCD display allowed the reading of data immediately upon its exit from the wave machine. Another important capability: Direct measurement of immersion depth. The following steps were performed:

Step 1 Parallelism was measured and established.

Step 2 Measurement of the board’s current dwell time, which was 1.0 seconds.

Step 3 Measurement of the board’s current immersion depth, which was 24 mil.

Step 4 Assessment of board quality, showing a defect rate at 312 ppm, a level considered normal at the facility despite the amount of rework being performed, and excellent by industry standards.

Step 5 Steps 1 through 3 were easily performed for three shifts in a row, twice per shift, since all data was obtained in a single run of the device through the wave machine. Step four was performed at the end of each shift.

If, prior to running the assembly, measurements showed a disparallelism, or a dwell time more than 0.1 second away from 1.0 seconds, or an immersion depth other than 24 mil, adjustments to the wave machine were made and additional measurements were taken to confirm that the desired board-wave experience was occurring. Areas unrelated to board-wave interaction were maintained throughout. These include, for example, flux types, preheat settings and solder temperature.

Soldering Machine
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wave soldering process is a very essential process for the manufacturers of the printed circuit boards. This process plays a key role in the manufacturing process and for the successful completion of the process. Every single part and operation performed or involved in this process plays a vital role in the quality of the final output of the process. In order to have a successful process of wave soldering we need to have all the process like thermal profiling, reflow profiling to be done very carefully. Similar is the cases with the equipment involved the process all the devices or the parts of the wave soldering machine like wave solder optimizer, wave solder pot, thermal profiler etc should be in there defined places and should be functioning properly.

The role of the wave solder pots is very important in the process of the wave soldering and in determining the final out put and the quality of the final out put of the process. In general the titanium wave solder pots are used in the wave solder machines for the wave soldering process. Titanium wave solder pot liner stops the iron dissolution and raises the life of wave solder pot. Longer the life of the wave solder pot the better will be the performance of the wave solder machine and for much longer period.

A titanium wave solder pot liner is that which can be located within the existing cast iron wave solder pot. So that to modernize the on hand wave soldering machine for the lead-free usage of the machines. This titanium liner could be collectively retrofitted to the most models of wave soldering machines. Though it is a cost efficient solution which eliminates the iron dissolution, reduces the solder contamination and keep away from periodic dumping of the solder pot. But it certainly enhances the quality of the product and also gives a consistency to the machine performance so as to produce the best product as the final output of the process.

In a normal tin-lead wave solder pot, impurities like copper fabricates and they develops inter metallic with the tin. This development of the inter metallic causes the reduction in the temperature of the wave solder pot, it allows the pot to be inactive for few hours, and float on the top surface can effortlessly remove the inter metallic. This technique works pretty well as the thickness of the copper-tin inter metallic (CuSn) is 8.28, and tin-lead (SnPb) is 8.80, which allows the copper-tin inter metallic to float.

Episodic preservation of the tin-lead solder pot can simply preserve the copper levels among an acceptable range of 0.15-3.0%. With the enlarged use of tin-copper or silver- copper lead-free wave solder alloys, the situation modifies, since the density of both alloys is less than that of tin-lead.

That was the description of the wave solder pots used normally I hope it will be beneficial to the people involved in the wave soldering processes and to their business as well.

Related Soldering Machine Articles

Welding technology in the electronics assembly occupies an extremely important position. General Welding divided into two categories: one is mainly applied to through-hole electronic components and PCB welding? Wave, the so-called wave (wavesoldering) that is soft solder melting solder by electric pump or electromagnetic pump jet peak into the design requirements of the solder, so that pre-printed board with electronic components by solder wave crest to achieve components with the PCB solder pad or pin end of the mechanical and electrical connection between the soft soldering welding; the other is mainly applied to surface mount components and PCB welding? reflow (reflowsoldering), also known as re-flow soldering, reflow soldering is through the so-called re-melted pre-assigned to the PCB pad of soft solder solder paste, solder-side components for surface mount or pin and the PCB pad mechanical and electrical connections between the soldering, to achieve a certain reliability of the circuit functions. With surface mount components in electronic products widely used surface mount reflow soldering techniques and technology into a major technology. Its main technology features: The flux of metal to be welded surface cleaning (removal of oxide), to make good on the solder wetting; supply of molten solder to wet the metal surface; in the solder and welding metal intermetallic compounds formed between ; also enables micro-soldering.

Reflow soldering is in advance of PCB Welding parts (pad) cast proper and appropriate forms of solder paste release surface mount components, solder reflow using an external heat source to the welding required by the group or by point welding. Reflow and wave soldering in comparison with the following features:

1, do not like the wave soldering components as needed to direct immersion in molten solder, so parts are subject to the thermal impact;

2, reflow the site only need to solder on the cast, a significant reduction in the use of solder;

3, solder reflow can control who discharge to avoid defects such as bridging the generation;

4, when the components have a certain deviation from posted up here, because the role of molten solder surface tension, cast in the correct position as long as the solder, reflow soldering can automatically correct this minor error, so that components fixed in position on;

5, can use local heating source, which can be used in the same substrate for different reflow soldering process;

6, solders are generally not mixed with impurities, the use of solder paste for reflow solder can be formed to maintain the right.

Reflow soldering techniques are classified according to heating methods are: vapor phase reflow, infrared reflow, infrared hot air reflow, laser reflow, hot air reflow soldering, and tools such as heating.

Reflow temperature curve theory: From the temperature curve (see Figure 1) of reflow principle: When the PCB into the heating zone (dry zone), the solder paste in the solvent, the gas evaporate, while the flux solder paste wetting pad component terminal and pin, solder paste softening, collapse, covering the pad, the pad, component pins and oxygen separation; PCB into the heat zone, so that PCB and components are fully preheated suddenly into the welding zone against PCB excessive heat damage to PCB and components; when PCB into the welding zone, the temperature rose rapidly to reach molten solder paste, liquid solder pad on the PCB, components and pin ends wet , diffusion, overflow or return mixed to form the solder joint; PCB into the cooling zone, so that solder solidification, to complete the soldering.

Temperature curve is critical to ensure welding quality, the actual temperature curve and solder paste temperature profile of the temperature slope and the peak temperature should be consistent. 160 temperature rise before the speed control in 1 / s ~ 2 / s, if the temperature slope too fast, on the one hand and the PCB heating component fast, easy to damage the components, could easily lead to PCB deformation; the other hand, solder paste in the solvent evaporation rate is too fast, easily spilled metal components, resulting solder ball. Peak temperature is set higher than the melting temperature of solder paste 20 ~ 40 or so (for example, the melting point of solder paste Sn63/Pb37 183 , the peak temperature should be set at about 205 ~ 230 ), back (again) flow time for the 10s ~ 60s, the peak temperature is low or back (re) flow time is short, will not fully welded, solder paste does not cause serious melting; peak temperature is too high or back (re-) long stream, resulting in oxidation of metal powder, affect the welding quality, and even damage to components and PCB.

Reflow temperature profile, and back under the principles of the reflow soldering machines currently on the market are generally simple four-zone reflow machine, there are six large, eight-or 12-zone reflow soldering machine, which model QHL320A reflow soldering machine 20 programmable temperature control, the equivalent of 20-zone reflow machine, it will return the temperature curves, and thus more precise temperature control, more fitting ideal reflow profile to achieve optimal welding.

Where good welding quality protection? QHL320A reflow machine in addition to full compliance with reflow in the control of outside temperature curve, but also allows users to truly understand the principle of reflow soldering. QHL320A reflow machine with the functions of large transparent window, users can have transparent windows throughout the entire welding process control, solder paste can be observed simultaneously in the whole state of the welding process changes, easy to find the problems in the welding process, through the parameters adjustments to improve, to ensure good quality of welding. Meanwhile QHL320A reflow soldering machine for small desktop machine, all-static soldering, effectively prevent a large-scale multi-zone reflow machine crawler transfer resulting from small vibrations, the vibration may be in the flow of molten solder paste soldering area state of the small space between IC (Such as distance 0.5mm) and components (such as 0603,0402 and 0201, etc.) affect the welding, leading to the drift component, solder balling, solder bridges welding defects, and all welding is still completely avoid these potential defects.

Set back (again) reflow soldering temperature profile of the authority:

1, according to the temperature curve using the solder paste to set. Different metal content of the solder paste has a different temperature profile, solder paste manufacturers should be provided in accordance with the temperature curve of the specific product set back (again) reflow soldering temperature profile;

2, under the PCB material, thickness, whether the multilayer, size, etc.;

3, under the surface mount board carrying components of the density, size and availability of components of BGA, CSP and other special components set.

4, according to the specific equipment, such as: the length of heated area, plus