When the computerized embroidery machine winds the bobbin thread, if one end is large and the other is small, you can use the tightening nut of the thread clamp in the picture, and then use the screwdriver to rotate the thread clamping nut to adjust until the winding is evenly laminated. If the winding bobbin thread is piled up like A, turn the thread clamping nut clockwise several times to adjust; if it is piled like B, turn the thread clamping nut counterclockwise several times to adjust.

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