Let‘s learn some info on electronic solder
Manual welding tool requirements
Note: Before proceeding, please pay attention to personal safety and device safety. Be careful to be burned or scratched, be careful of the wire was hot iron caused by short-circuiting， or line leakage to be shocked.
1. Best solder tools
Diameter of 1.0mm solder wire for copper jack welding, solder and PCB board of tin, some of the larger components of the welding.
0.8mm diameter solder wire for the general type of electronic components welding.
Diameter of 0.6mm solder wire, for small pieces of electronic components and welding.
2. Electric Iron Power Selection Requirements
- Considering to use 35W internal heating electric iron when welding conventional electronic components and other components of heating parts.
- Selection of 60W internal heating electric soldering iron to wire, copper jack, solder pad and tin plating to the PCB.
- Removing some of the electronic components and heat-shrinkable tube shrink when considering the selection of a hot air gun.
3. Electric Iron Use Precautions
- The new soldering iron must be dipped in a layer of tin before the use of tin (To energize iron, and then heated to a certain time with a tin bar near the tip), the use of a long iron soldering iron, And then heating the heating temperature, and the tip of the dip dipped in a little rosin, until the rosin smoke on the tin, so that the tip of the tip of the first plated with a layer of tin.
- Before using the new iron must be dipped in a layer of tin (soldering iron to electricity, and then heated to a soldering iron when it is close to the tip with tin), then powered heating up and the tip dipped in rosin one o’clock, in time to be on the tin rosin smoke, so the first tip surface coated with a layer of tin.
- After powered electric iron, do not be on the iron frame, if a long time when not cut off power to prevent high－temperature oxidation of iron head. To prevent the electric iron from burning other components, especially the power cord, if the insulation layer is burned iron may lead to safety accidents.
- Do not beat the electric iron vigorously in order to avoid failure and shock power soldering iron inside electric wire or lead.
- After a period of use electric iron, iron head left in the tin dirt under iron heating conditions, can light with a damp cloth Sassafras. If there are grooves or oxidized blocks, apply a fine grain rasp to repair or replace the tip directly
4. Installation of Electronic Components
Manual bend pins can be twisted with tweezers or a small screwdriver. All components shall pins bent from the root, the general should be left more than 1.5mm; resistors, diodes and similar elements to the pin bent and shaped into a vertical element then installed interpolation.
5. components installed requirements
- Electronic Component instrumentation required to achieve clean and firm, components should be inserted into the correct place, no tilt, deformation phenomena. It should also be conducive to facilitate heat welding and welding components.
- Resistors, diodes and similar elements position parallel with the board, will have to try to put the component side characters easily observable.
- Capacitors, transistors, inductors, thyristors and similar components require pin mounted vertically, perpendicular to the circuit board components.
- IC, IC socket mounted plug-note sequence can not pin inserted upside and the installation should be in place, in parallel with the board member.
- The polarity of the components in the installation should pay attention to polarity, can not be installed in reverse polarity.
- Requires a high degree of unity when the same element is mounted, manual insertion welding follows the principal of first low to high, the small to big.
- During installation, hand edge of the board can only take place without electronic components, electronic components hand can not touch the pins, to prevent electrostatic discharge damage to components.
6. Component welding requirements
- Before the electric iron energizing check for leaks, ensure the integrity of the warm power. Electric iron reaches a predetermined temperature during welding. If the welding device is sensitive to electrostatic discharge, electric iron should be well grounded.
- First, based on design drawings test PCB panel meets design requirements: requires PCB panel surface is smooth, no scratches fracture phenomena exist; PCB panel requires smooth and no deformation phenomenon.
- Electronic components pre-installed plug-in checks whether the surface oxidation, ensure mounted electronic components into the circuit board without oxidation phenomenon; rigorous testing to receive electronic component model, the parameters to ensure compliance with the design requirements.
- Master welding time, welding general element within 2-3 seconds after the larger joints in 3-4 seconds after welding. When a welding finishes some time to wait for a secondary element to cool before welding.
- Solder joints require smooth and shiny, uniform size conical. Can not appear Weld, fake welding, missed welding, wrong welding, welding, welding, surfacing, pulling tip phenomenon.
- Clean surface oxidation of the components, the tin processing after welding.
- The Flux can not be used too much, welding surface should be clean, there can be no residue.
- PCB board welding does not allow foil tilt breakage, short welding wire to be well insulated. To prevent short circuit. Pin plug and wire welding should be a good set of heat shrink tubing.
Welding IC should wear anti-static wrist strap to avoid damage to the device. After welding must be carefully checked to ensure that the welding is correct.
But if you do not intend to solder yourself, you can ask a professional electronic solder service to do so, let’s see who can offer the best solder for electronics.
Seeed Fusion offers PCB Assembly service, they not only can manufacturing the PCB, purchase the components, but also can help to soldering the components. They generally use lead-free solder wire, and they require the solder joints are smooth and full without burrs.
The quality of the board is really good, they also offer testing service, Seeed studio Fusion PCBA service is a good choice if you need one-stop prototyping service.