I am a novice, in self-study scm. Want to do their own learning boards and power. But in the electronic circuit boards on the use of electronic components, what is the use of electric iron head? Is there anything else you need to use besides the electric iron? Want affordable.
The pad of the pan is very big, besides, it is not necessary to do the exercises. It can use a few pieces of copper tilted head iron. Suggest a 20W and a 35W. The former is used to weld small components, and 35W is used to weld devices with greater heat dissipation. The two won't add up to ten dollars.With the proposed things to use public incense, do not recommend the use of solder paste, because it contains acidic substances, especially the SCM crystal oscillator is easy, and therefore can not start vibration, I have had this situation.To prevent overheating, there should also be a pointed forceps.Conditional word can also prepare the following things: with working lamp, magnifying glass or tin, tin suctioner with anhydrous alcohol (remove excess rosin).
For beginners, SCM components or choose the cutter head welding iron, 20W power is enough, I do not recommend beginners, rosin flux, one is on the human body is not good, two is the welding of components is not helping, solder wire with flux is sufficient......Buy electric iron to go to a regular place, such as supermarkets, cheap things dangerous, iron head fast aging, the price to 20 yuan a few as well, the cutter head can be a single buy, in general, welding will be used when the two iron head, and sharp knife, to the two aOther welding tools are not complicated:1., iron table: with a rough wire to do a smooth point of the M type, and then fixed on a template can be very affordable, finished products, then, with solder wire rack to more than 20, the average of about ten yuan2. tweezers, oblique pliers, tin gun: domestic prices were 2 yuan, 6 yuan, 6 yuan, import: 20 yuan, 80 yuan, 35 yuan. I used the latter, from the beginning of learning electronic production, and now, used for about 11 years, is still very easy to use, and the former often less than a year have died3. solder wire: essential, beginners should choose slightly more fine, because the iron power is low, the temperature is low, too thick solder is not easy, the price is generally more than 20 yuan4. cutting saw blade: the best tool for removing element pin and soldering head, zero cost...
It's better to wear a tapered head.But this is only one aspect. In order to achieve better welding results, we should also pay attention to several points:1, the power of electric iron. Summer use 15 to 20 watts, winter 20 to 25 watts. At the same time, prepare a piece of fiber cloth with water. When the temperature of the soldering iron is too high, wipe it on the fiber cloth to reduce the temperature to a suitable level and then weld it.2. Solder wire. The taper iron head is not easy to solder. It can only solder the solder wire to the solder joint, and then solder it with the iron, so that the diameter of the solder wire is very important. Generally, the solder wire with a diameter of one millimeter is used.3. Control welding time. The general solder joints can be finished within 3 to 5 seconds, otherwise it will damage parts or cause the pad to fall off.4. Control solder quantity. Too few solder joints, low mechanical strength, easy to fall off the day after. Too much flow, short circuit and waste solder.5, choose the better quality of the circuit board. The substrate is preferably a fiber board, and the pad is not easy to fall off. The edge of the pad is smooth and burr free, otherwise it is easy to weld short circuited.6, the use of boards and components foot oxidation. Put aside the time, the pad on the pad surface oxidation, you can use 00 fine gauze grinding, just showing copper so far, and immediately with the prepared rosin alcohol (anhydrous alcohol) solution evenly coated. The components of the oxide are also handled cleanly. Do not use corrosive flux.
In fact, with the habit of what kind of head down, there is not much difference, but not too thick or too fine on the line, usually after buying the iron, you can use your own file, the file into the shape you like.
