Common fault analysis of computer vehicles
The computer car runs at almost 24 hours a day, continuously and at high speed. However, during use, it is subject to environmental temperature, humidity, dust and magnetic field interference and influence, which will challenge the stability and reliability of the machine work; lightly cause breakage, short circuit and other faults, and then cause deformation of the pattern. The product is scrapped. Below I will introduce to you some of the common problems in the use of computer pattern machines, I hope to help everyone.
Occasionally, the computer car will have an untimely error disconnection alarm. The computer car sometimes has an untimely error disconnection alarm. Sometimes it occurs four or five times a day, sometimes once every two days, but there is no regularity. The repairman tried to replace the decoder board with a 12 volt, 5 volt power switch, but none of them worked. Careful inspection revealed that this machine used the old generation Dahao 91 improved electronic control system, and its break line detection was separated from the jump electromagnet drive. The repairman carefully checked that there was no short circuit between the nine needle signal lines, and there was no phenomenon of rubbing the case. After hearing the operator said that the machine has been using the needle all the time, recently because of the change of the order of more colors, there is a frequent false alarm. Therefore, the maintenance personnel measured the positive and negative resistance of the needle and other needle signals, and found that one of them had an abnormal resistance. In theory, it should be non-energized because there are diodes isolated and connected in parallel. Open all the head detection, and finally found that there is a signal line on the No. 8 head, which is just on the common foot. Therefore, when the machine works vibrate, sometimes there is no contact, sometimes contact, and the irregular false alarm phenomenon is difficult. The problem of embroidering is embroidered with cotton thread, which is easy to break when booting. 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 for each computer needle car, but many of the 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, and a 10-head machine can be operated in several tens of minutes.
Http://news.chinawj.com.cn Submission:
magic Drawing Board, glow in the dark drawing board, glow doodle board
3D Light Drawing Board,Illuminating Drawing Pad,3D Light Up Drawing Board,3D Glow Drawing Board
Guangdong Jishengke Industrial Co., Ltd. , https://www.suronart.com