What is selective soldering process?

Table of Contents

Selective Soldering is a process to solder individual through hole components on a PCB using a solder fountain. The machine includes a flux spray, preheater and a soldering pot that feeds a solder fountain. The solder fountain or head moves to the position to solder from underneath.

What is selective wave soldering?

Selective soldering is a variant of wave soldering used mainly for soldering printed circuit boards that are assembled partly or even entirely with through-hole components.

How do you measure soldering quality?

Major points of interest during the visual inspection of solder joints are as follows:

Degree of wetting is a measure of solder joint quality.
Joints Contours are also inspected as they indicate the volume of solder deposited.
Thermal damage.
Damages on the devices caused during handling.

What are four process stages in soldering?

What are the Steps involved in the Wave Soldering Process?

Step 1 – Melting the Solder. This is the very first step in the entire wave soldering process.
Step 2 – Cleaning the Components. This is a very crucial step to be carried out.
Step 3 – Placement of the PCB.
Step 4 – Application of Solder.
Step 5 – Cleaning.

What are the method of soldering?

Top 8 Methods of Soldering | Metallurgy

Method # 1. Soldering Irons:
Method # 2. Torch Soldering:
Method # 3. Dip Soldering:
Method # 4. Wave and Cascade Soldering:
Method # 6. Resistance Soldering:
Method # 7. Induction Soldering:
Method # 8. Other Soldering Methods:

Which checking is important in soldering?

It’s important to check with your PCB assembly supplier to understand the technology involved in their soldering process and in solder joint inspection. If your supplier doesn’t invest in a sophisticated machine or relies only on manual inspection (a.k.a. bare eyes inspection), you could be in for a rough ride.

What are the determining factors a good solder and determining factors of a bad solder?

A good solder joint will have a shiny finish to it, and it should not have too much solder. Typically the contour of the solder around the joint should be slightly concave.

What are the 10 steps of soldering?

For a more thorough overview of soldering techniques, check out my other Intro to Soldering instructable.

Step 1: Solder. For Simple Bots, the ideal solder is .
Step 2: Turn It On.
Step 3: Picking It Up.
Step 4: Putting It Down.
Step 5: Tin the Tip.
Step 6: Strip Wires.
Step 7: Twist.
Step 8: Solder.

What are the six steps of soldering?

Just Follow the instructions given below and Watch The Video to get Perfect Soldering Results!

Step 1: What You’ll Need. A 20-40 Watt Soldering iron or a Mini Soldering Station.
Step 2: Tinning.
Step 3: Soldering Wires.
Step 4: Soldering on PCB’s.
Step 5: Cleaning the Flux.
Step 6: Soldering Tips!

What is the difference between reflow soldering and wave soldering?

The essential difference between wave soldering and reflow soldering lies in flux spraying — wave soldering contains this step, while reflow soldering does not. Flux enables dioxide elimination and surface tension reduction in the material to be soldered.

What is solder bath?

Solder baths – ideal for tin plating of stranded wire braids ERSA solder baths consist of electrically heated melting pots for tin/lead and similar alloy solder. The high-capacity ceramic heating elements are exchangeable and mounted to the pot.

What is the best temperature for soldering?

600°- 650°F (316°- 343°C) is a good place to start for lead-based solder and 650°- 700°F (343°- 371°C) for lead-free solder. You want the tip hot enough to melt the solder efficiency, but excess heat can damage components as the heat travels along the leads, and it will reduce the lifespan of the soldering tip.

What are the safety rules for soldering?

Soldering Safety

Never touch the element of the soldering iron…. 400°C!
Hold wires to be heated with tweezers or clamps.
Keep the cleaning sponge wet during use.
Always return the soldering iron to its stand when not in use. Never put it down on the workbench.
Turn unit off and unplug when not in use.

What is a solder test?

Solderability testing is a destructive test and a common flow-down requirement performed to ensure that the solder will stick to the leads properly in next level assembly. A proper solder connection indicates proof of wetting and is a reliable and quantitative way to measure solderability.

What are the factors that influence the selection of solder?

No matter which type of solder you use, the temperature and its ability to wet a surface will affect the PCB solder joint strength. In addition, each type of solder can form oxides if the incorrect type of flux is used, which will also decrease PCB solder joint strength.

Why selective soldering processes?

Selective soldering processes lead to economic success if the processes are precisely adapted to the applications and quantities. A very important factor in this context is productivity, i.e. the throughput of assemblies through the soldering system. This is implemented in practice by multi-wave soldering technology.

What is the soldering verification process?

This soldering verification process ensures that SMDs, substrates, solder alloys, soldering processes, associated staking compounds and conformal coatings are suitable for the operational lifetime of the spacecraft. The following figure illustrates the tests involved in the ECSS soldering verification plan described in the current post.

What is mass selective Dip soldering?

Mass selective dip solder fountain: A variant of selective-aperture soldering in which specialized tooling (with apertures to allow solder to be pumped through it) represent the areas to be soldered.

How do Ersa selective soldering machines work?

To meet these diverse challenges, Ersa selective soldering machines can be equipped with up to five preheating modules and optional top heaters. In the basic version of mini-wave soldering, a single solder nozzle is used, which solders each solder joint one after the other.