The cotton thread is embroidered, and it is easy to break the wire when it is turned on. First of all, we must solve the problem of the key position of the cotton thread difficult to embroider.
Analysis and Solution of Difficult Embroidery of Computer Pattern Machine Cotton
It is easy to use the cotton thread for patching and embroidering. First of all, we must solve the problem of the key position of the cotton thread difficult to embroider. The looser (half-tooth) of the thread take-up lever is as small as possible, and of course the position should be adjusted accurately. The smaller the loose position of the vinyl, the better, by pressing the presser foot. The position of the top and bottom dead points should be accurate. The line should be smooth, this is very important, the line pulls up without the feeling of a card, of course, can not be adjusted too loose, the line will pile up, adjust too tight will break the line; the bottom line is also loose, but not the bottom line. The elastic force of the induction spring, the spring force of each induction spring is different, so each head must be adjusted, some are large, some are small, and have a great relationship with the stroke of the induction spring, you can adjust the copper The piece determines the stroke of the induction spring. Select the appropriate embroidery needle according to the thickness of the line. The shuttle bed should be adjusted 2° ahead of time, and the 202° should be adjusted at 200°. The distance between the needle and the tip of the shuttle should be as small as possible. When debugging, do not open all the heads, you can open 5 ° each time.
Self-made tools to solve the problem of synchronization is the perfect synchronization is the necessary requirements of each computer pattern machine, but many of the debugging machine synchronization is not satisfactory. Even the best synchronization of the meter adjustment has an error of about 2°. Because at the bottom dead center; the drive block that can be driven between the strokes is only about 0.003 2 mm, such a small error can not be accurately locked. In the adjustment, if you use a self-made special tool, you can use the intermediate point method for synchronous debugging.
The adjustment is very simple. Firstly, the drive cam is loosened, then the spindle is fixedly locked at an angle. After the tool is placed under the drive block, the screw is adjusted to a semi-loose state (sliding up and down with a slight force), and the No. 1 adjustment head is placed. Under the drive block, turn the cam to press it to the bottom dead center and tighten the screw. Then turn the cam to lift the drive block to the No. 2 adjustment head, turn the No. 2 adjustment head to the drive block, turn the cam to make the drive block lightly press on the No. 2 adjustment head, and lock the cam screw. Such a head adjustment is completed, and other sequential operations.
The synchronization error debugged by this method is only 0.5° at most, because there is a stroke of about 0.37 mm per revolution at the intermediate point, which is about 114 times the error of the direct measurement of the bottom dead center, and only one revolution per revolution. 0.003 2 mm or so. Moreover, the efficiency of this method is quite high, and it is not necessary to repeatedly measure. A 10-head machine can be operated in dozens of minutes.
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