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soldering iron station for circuitsYou will find often two forms of product used to make a board that is multilayer. Pre-preg material is slim levels of fiberglass pre-impregnated by having an adhesive, and is in sheet kind, often about .002 inches dense. Core product is comparable to a tremendously double that is thin board in that it features a dielectric material, such as for example epoxy fiberglass, having a copper layer deposited for each side, usually .030 thickness dielectric product with 1 ounce copper layer on each side. In a board that is multilayer, there are two methods used to build up the required wide range of levels. The core stack-up method, that is an adult technology, runs on the center layer of pre-preg product by having a layer of core material above and another layer of core material below. This combination of one pre-preg layer and two core levels would make a 4 layer board.

The film stack-up technique, a newer technology, could have core product while the center layer accompanied by levels of pre-preg and copper material accumulated above and below to create the last wide range of layers required by the board design, sort of like Dagwood building a sandwich. This technique permits the maker freedom in the way the board layer thicknesses are combined to satisfy the product that is finished needs by varying the amount of sheets of pre-preg in each layer. After the product levels are finished, the entire stack is put through heat and stress that triggers the adhesive within the pre-preg to bond the core and pre-preg levels together as a entity that is single.
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The dark spot is oil left over through the cutting and forming process during the manufacture. If this oil is left for you will burn your fitting and it surely will not take the solder.

Flux the pipe and fittings: Using your flux past brush each end associated with the pipe and fittings. This will guarantee a clean and tinned joint.

Time to solder: Whatever size your pipe, that is how much solder you will need to use to sweat your bones together. So, you will need one inch of solder to sweat your joints together if you are soldering 1" one inch copper pipe.

Using a torch temperature your pipe and suitable evenly. Start two inches behind the fitting and slowly heat your pipeline and fitting using a right back and motion that is forth sweeping. Ensure that your flame is near enough to cover the diameter that is entire of pipe.

When your flame turns green apply the solder to your hub regarding the fitting, ensuring the solder moves most of the real way across the hub. Wait!There is one more "Secret" move to a solder that is perfect, which means the difference between an amateurish glob of a mess in your fixtures or even a professional looking solder joint every time.