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1781-type aircraft maintenanceJump-edge machine needle is often the fault, jumping needle can be divided into: The hook-hook-line-and-jump-hook did not jump on the suture needle. The hook-hook-line-dancing How to determine the next hook-hook-line-dancing? In operation Shanggou line hook-Zhenxian Gouzhu Central, with a suture needle-drop, the next line hook-hook line, then slit the above material on the hook or cable lines, Central, this is because the next line hook-hook Gouzhu not the first machine needle on the Central Line caused by the needle jumped. Time-adjusted high degree of targeting criteria are: machine needles on the dead point in time to board plane needle tips from 16 mm. The hook-line time for the hook line: machine needles in the first lap down to the next point after death, upward rebound 1.3 mm, the hook-hook the first line should reach the concave center-pin (Figure 1), and the first hook - Needle concave gap is zero. Here want to emphasize is usually under-recovery of 1.3 mm, the hook-hook the first line should reach the centre of needles. This is because the needle-to-pin-drop when the needle was blocked in the closure of the side-board (2,3), the operator of the pinhole to the open side, the suture needle marks in the loss of protection, machine needles from the Died at a slight upward rebound of the suture needle marks Rally very easily lose a Central Line, if the hook-hook-line time slightly late in the Application List system on line before the suture needle marks, easily emerge from the plane or the Central Line Big jump-twisted cause. May also be under-hook-hook line slightly ahead of time. Machine hook-line-dancing Machine hook-line-dancing performance: sewing fabric in the front of a needle or a few needles without trace, or a few stitches after the machine-needle can not take on the suture. The failure to exclude, first of all machines should send the next line agencies understand, understand its working principles, time phase. Machine needle in the first lap of death, when the rebound of 1.3 mm topical hook-hook-head Gouzhu Zhenxian Central, and will continue to expand the revolving line Central (4,5), followed by sutures will be sent into the line that within the tight line hook in the line-in folder. At the same time, the next line hook sent to the end of the previous trip, backward (the operator) Cazhe suture campaign to end after the trip, and then to suture Gouzhao campaign to stop before the trip ends. The second round of the machine without suture needle drop to the next point after the death began to rise, this time sending the suture line that pushed simultaneously around the left front of a machine needle movement, the delivery of that plane and meet at the needle The distance is 0.1 mm (Figure 4), rose to the closure of needle-shut-pinhole, sent under the line that started the Back, tight line hook-line, the line to open folder. To ensure a smooth machine-stitching on the hook, then the next should be sent to each suture line hook, line refers to the next delivery, in-line folder, within the tight line hook. The important thing is to be sent each time the line hook Gouzhu suture, which requires them to be a good time for adjustment phase. Adjustment of the best observed using acupuncture board (the board the right-Modiao part), in order to observe the hook-line hook line, sending the hook-hook line and line delivery, the delivery of that line in delivery. The sending-line hook in the machine before the trip at the end of the standard position: the delivery line hook-and-distance is 2.5 mm. The delivery of the left hook in the standard 2position: under Gougou sent to the first line beyond the left-pin 0.3 mm. Rotary Matsushita sent on a fixed line hook screw adjusted (6). The line hook sent to the high-plate distance below 0.3 mm (Figure 7), Rotary Matsushita sent line hook fastening screws to regulate. Why should distance needle plate so close, mainly because of higher delivery line hook, line hook sent under the easier it is Cazhuo suture backward movement, will be able to return Gouzhu sutures. Machine-jump-hook line, the vast majority are due to the delivery line hook Gouzhu not caused by the sutures. The line hook sent to the back of the arc Cazhao suture backward movement, and then hook on the end of suture sent forward itinerary This is especially important. We must pay attention to the fact that, in the process of sewing Duanzhen, troubleshooting, best to check under the Arc hook sent to the back line there scratches, if sent to the back of a curved line hook Burr, then the present Hook sent back line movement, it is impossible to suture smoothly down the line hook sent under the front of the line hook will not send Gouzhu sutures, jump-it is very natural. Folder line-adjusted properly, will lead to needle-line when the occasional jump hook needle. It is time to phase: the first lap under hook-line-Gouzhu Zhenxian Central rotating expand, tight line hook and line for folder on the left half of the next line hook-hook before the first around 8 mm, under the Application List system has begun to enter the line - . When the rebound in the second round of machine-Gouzhu suture needle was sealed shut after the pinhole, tight line hook-line, the line to open folder. Adjustment method is: Screw-line control cam folder on the two fastening screw adjustment (8), but should also be adjusted under the observation of the delivery line hook-time delivery phase is correct. This is because under the delivery line hook control cam and cam folder of control is linked to, if the delivery time line hook phase be affected, should be removed under the hook-line, the Line of Control in the folder Cam bed with wrench Screw-two fastening screws, which used the six-party wrench with a screw in the sliding bed, to change the delivery time line hook phase. At the end of a long Xiantou At the end of a long Xiantou ideal is about 10 cm, more than at the end of Xiantou on it that is too long, resulting in a waste of stitches. Xiantou long is the main reason for the adjustment of the delivery line hook improperly positioned under hook line and not transferred to the standard set position. In short to end Xiantou short, hook-line delivery of high not low, the hook-line hook-line time not later than early. Suture spread, and disconnected from the wire Silk sutures from the mainly due to the delivery of that line and sent folder line with the time-lines caused by premature. Adjustment method is to adjust their respective control cam time phase. Standard time phase in Figure 4, needle-point rise from the dead, sent under the simultaneous delivery of that line, closed-shut-pinhole, sent back to the beginning of that withdrawal, the folder open-line start-line. It also can adjust screw-line folder and change the size of the tension suture (5), the hook-line hook in the first stitches on the card if the head of the small hook or bearing operation does not lead to flexibility, all from the silk sutures And disconnected (9). Pick the hook line will lead to improper installation of adjustment from the silk sutures and disconnected. Pick-hook phase is the standard time: The hook-line hook for the first Gouzhu Zhenxian Central, the pick-hook line folder should be singled out for the middle of the stitches (10), if not correct, adjust its control cam that is, Can be. It should also pay attention to the back of the pick-hook must be smooth, it will not be able to enter the pick suture line hook, line-folder in the suture it can not be singled out. In addition, each started sewing thread when the length of no more than 90 cm, set off the 3assembly line more than the capacity of line will also appear from the silk sutures or disconnected. Machine-linked yarn Should first check whether the closure needle damage or wear, whether bending machine needle, needle closure position is correct. The closure-standard position: When the machine needle in the dead spots, the closure of acupuncture needles should be closed openings, the closure of the needle marks from the bottom of 0.8 1.2 mm, with the closure of acupuncture needle to a paste. In addition, the folder line for late-line time, the lines too tight will cause deformation of needle pegged yarn. - Point adjustment handle shaking from top to bottom Should first check whether string gas in the cylinder (11), the positive and negative points-button, the button-point adjustment whether connection is bad, check whether the electromagnetic valve action flexible. If no gas cylinder string parts, rubber ring in the cylinder tank Chanshang February 3 laps to bring raw material. Such as electromagnetic coil valve bad for the same model as long as the coil. Code-and-points of failure Regulation needle-point code and the size must first press the button on their conditioning and then adjusted, for good and then click the back button. If the button is not directly transferred, not only for fixed, but also to adjust screw slippery silk, and a pin-point code can not control if good-by to forget after button, pin code will be chaotic, can not operate. - Point size is not negative, they should spin-conditioning Press tighten screws on the two repeatedly regulation (11). Machine-parking spaces is to rely on sync with the positioning. Machine-standard parking spaces is: the end of the second lap, machine needles dropped to 10 mm above-board should be stopping, at this time Shanggou line hook from the tail-plane about 10 14 mm. By-side machines running two laps completed a work cycle, the adjustment synchronizer must seriously observe. Adjusted well, either machine needle stopped at the end of the first lap, causing no sewing; either stop-bit too high or too low, causing threading needles trying to open or closed when not Add to fabrics. And spindle synchronization between the belt tension Chamber tight.
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