1. Material confirmation

②When unused pins need to be cut off, they should be processed before winding.

③Confirm that the bobbin is complete without damage or cracks.

④ Insert the bobbin correctly into the jig.

⑤When it is necessary to wrap the acetate tape, it should be wrapped according to the requirements of the drawing, close to both sides of the frame, and then wind the wire on the designated pin first, and then start to wind the wire (the winding should be within the designated range).

2. Winding method

① One layer of dense winding: the wiring only occupies one layer, and there is no gap between the tight lines.

②Uniform winding: winding at equal intervals within the winding range. Errors within 20% are acceptable.

③Multi-layer dense winding: it needs to be wound on two or more layers. This winding method is divided into three situations:

1) Arbitrary winding: Arranged neatly to a certain extent, when reaching the top layer, the wiring becomes scattered and uneven. This is the crude way to wind a wire.

2) Neat arrangement: almost all wirings are neatly arranged, but a few wirings are scattered (about 30% of the whole, about 5% when the number of winding turns is small).

3) Completely neat winding: winding to the upper layer is not loose, and the windings are neatly arranged. This is the most difficult winding method in winding.

④Positioning winding: the wiring is specified at a fixed position.

⑤Parallel winding: Two or more lines are wound in parallel with the same group of lines at the same time, and they are respectively wound in parallel without intersecting.