Spotter is a device that at the moment of passage of current generates a large amount of heat directly in the contact zone of the welded parts. This device is especially indispensable in those situations when it is impossible to get to dented surfaces from the back. For example, to fix the rear wings, doors and sills. The force in this case will be applied exclusively to the outside of the surface. And it is quite natural that many car owners would dream of having such a device in their arsenal. However, the price of new equipment can reach several hundred euros today. For this reason, some motorists decide to make a spotter with their own hands.
List of required tools
Before proceeding directly to the assembly process, you should make sure that you have all the tools and materials necessary for the job. Firstly, a welding transformer and an electronic relay are required. The latter should be installed on the thyristor V9. Secondly, in advance it will be necessary to take care of the presence of a small auxiliary transformer, which will subsequently be responsible for the power supply to the control system network. Thirdly, a power unit and a welding gun are required.
It is from these two parts, in fact, that all home-made welding machines consist. Fourth, a small amount will require a flexible cable and casing. Using the first, the parts that make up the homemade spotter will be connected, and the second will be necessary for the power unit. And finally, fifthly, you will definitely need an electrical circuit for assembling this type of equipment.
How to make a spotter do it yourself?
In order to assemble the device itself, as already mentioned, you will need only two elements - a power unit and a welding gun. At the same time, the part from the traditional semiautomatic device is used for the latter, however, it will be necessary to mount the so-called brass axis with M10 thread in it. It is thanks to her that the device will join the straightening apparatus. And only after that it will be possible to fasten the welding cable. Among other things, it should be emphasized that at the other end of this wire the power connector, necessary for the fastening, should be placed. In addition, when making a spotter with your own hands, it is extremely important not to forget to attach a pair of pins to the thrust washer, and to fix the rubber gasket on the back.
Homemade spotter benefits
The main advantage of a home-made apparatus, which significantly distinguishes it from any other type of welding, is that it will not have welding tongs. All you need is a fastener, for which you can choose anything you want - from the ordinary nut to the stud. In addition, one of the main advantages that a spotter owns, assembled by himself, is rightly called by experts that the surface temperature with a dent in the area of direct contact will rise to a point that will not reach the melting point just a couple of degrees. Subsequently, this will make it possible to securely fasten the fastener. Working with such a tool is a real pleasure!