On a normally running enameled wire, most of the operator's energy and physical strength are consumed in the pay-off part. The replacement of the pay-off reel requires the operator to pay a lot of labor, and the joints are prone to quality problems and operational failures when changing the wires. An effective method is to pay off with large capacity. The key to pay-off is to control the tension. When the tension is large, it will not only draw the conductor thin, make the surface of the wire lose its brightness, but also affect many properties of the enameled wire. From the appearance point of view, the enameled wire that is drawn thinner has poor gloss; from the performance point of view, the elongation, resilience, flexibility, and thermal shock of the enameled wire are all affected. If the pay-off tension is too small, the line will easily jump and cause the line to be merged and the line to touch the furnace mouth. When paying off, the most fear is that the half-turn tension is high and the half-turn tension is small. This will not only cause the wires to loosen, break, and be thinned one by one, but also cause large jumps of the wires in the oven, resulting in failures of merging and touching the wires. Pay-off tension should be even and appropriate. Installing a booster wheel in front of the annealing furnace is very helpful for tension control. The maximum non-extension tension of soft copper wire at room temperature is about 15kg/mm2, the maximum non-extension tension at 400℃ is about 7kg/mm2; the maximum non-extension tension at 460℃ is 4kg/mm2; the maximum non-extension tension at 500℃ The extension tension is 2kg/mm2. In the normal enameled wire coating process, the tension of the enameled wire is significantly smaller than the non-extension tension, which is required to be controlled at about 50%, and the pay-off tension is controlled at about 20% of the non-extension tension.

Large-size and large-capacity spools generally use radial rotary pay-offs; medium-size wires generally use over-end or brush-type pay-offs; fine-size wires generally use brush-type or double-cone pay-offs.

Regardless of the wire pay-off method, there are strict requirements on the structure and quality of the bare copper wire spool. The surface should be smooth to ensure that the wire is not scratched. The two sides of the shaft and the inside and outside of the side plate have a 2-4mm radius r angle to ensure the release. After the spool can be discharged evenly during the threading process, the dynamic and static balance test must be performed. The diameter of the spool must be tested by the brush spool: the diameter of the side plate is less than 1: 1.7; When the shaft core is broken, the wire will be broken.