1. According to the analysis of the samples of the defective products, the disconnection of the wire bundle is obvious, and the coil interruption is loose and scattered, so as to judge that the rotor rotating friction coil is defective due to the loose contact of the coil with the rotor. 2. The above problems are caused by the looseness of the coil caused by the failure of the production technicians to adjust the tension during the machine adjustment, and the failure of the stator pressing station personnel to check whether the coil is beyond the insulating frame, resulting in the outflow of the defective products.<br>3. The number of coils is too many and the wire frame is too low, which causes the coil to exceed the insulating frame.<br>
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