Ремонт динамиков. Намотка катушки своими руками.

Read more in the article series: http://oldoctober.com/ru/loudspeaker_5/ How to calculate the number of turns and the winding length of a speaker coil. How to wind a speaker coil. Before the main winding, a few extra turns are wound on the sleeve to securely attach the wire and sleeve to the surface of the template. Then, during each extra turn, an even layer of glue is applied to the sleeve with a brush. After this, the first layer of the coil is quickly wound. Then, a weight is attached to the wire, which helps maintain the required tension on the wire and frees up the previously occupied hand. Then, the first layer of the coil is coated with glue. Do not attempt to secure the end of the wire by winding it around an object at this stage! Any extra bend in the wire can increase the dimensions of the coil, thereby reducing the external air gap. If you still can't avoid kinking the wire, pull the problem area through your thumbnail several times. After fifteen to twenty minutes, when the glue has dried, you can begin winding the second layer. First, wind one or two turns of the second layer, then coat the first layer of the coil with glue. This is done to prevent the fresh glue from dissolving the previously applied glue, and to prevent the first turn of the second layer from falling into the gap formed between the outermost turns of the first layer. After winding the second layer of wire, dry the coil for 10-15 minutes, and then coat it again with glue. Once the glue has dried thoroughly, you can either remove the coil from the mandrel along with the sleeve, if it is already glued into the cone, or glue it into the cone directly on the template. However, in some cases, the sleeve is glued into the cone during speaker assembly. To remove the sleeve from the template, the area of ​​the gasket where the adhesive was applied is cut off, and the sleeve is removed from the mandrel along with the coil and gasket. If the gasket does not slide on the mandrel, the wire tension during winding was too great. It should be noted that excessive wire tension can reduce the gap between the sleeve and the core, making speaker assembly impossible. This is because copper wire can stretch and contract, like any other metal. Separating the gasket from the sleeve. Since there is a gap in the sleeve, glue penetrates it during coil winding, causing the sleeve to adhere to the gasket. To separate the gasket from the sleeve, simply use a brush to lightly moisten the area where the gasket is bonded to the sleeve with acetone or alcohol.