Maintenance Of Three Needle Five Wire Seam Sewing Machine Left Long Needle Jumping Needle

For three needles and five lines Flat seaming machine The reason for the failure of the left long needle is that the bending needle and the needle are not right.

In this regard, I believe that the first step should be to bend the needle to the far right, and then check the distance between the tip of the needle and the center of the needle whether there is a 3.5mm - 5mm. If the distance between the curved tip and the center of the needle can be kept, the synchronous relationship between the bending needle and the machine needle is correct. Conversely, if the distance between the curved tip and the center of the needle is not kept, the synchronous relationship between the bending needle and the machine needle is not correct.

that adjustment We need to unload the needle plate and carefully adjust the synchronous relationship between the needle and the needle until it is in the right place.

It is worth noticing that this problem should be analyzed in two ways: first, if the left long needle jumps in the thin material place from the thick material to the thin material sewing process, then the formation of the wire ring should be considered properly. The corresponding treatment measures are to speed up the bending needle hook line, reduce the needle bar appropriately, and reduce the needle take-up line at the same time; secondly, if the left long needle jumps at the thick material from the thick material to the thin material sewing process, we should consider increasing the formation of the wire ring appropriately. The corresponding treatment measure is to slow the bending needle hook time, raise the needle bar appropriately, and increase the needle line at the same time.

In addition, we should adjust the gap between the bending needle and the long straight needle. We should try to bend the needle to the long straight needle, but do not touch the needle, then adjust the gap between the bending needle and the straight needle when returning to the hook line. In other words, the gap between the two needles will always remain the same.

While debugging, we should also make comprehensive use of adjusting suture tension, intentionally changing the installation direction of machine needle, appropriately reducing sewing speed and other measures to carry out maintenance and debugging.

In this regard, the specific adjustment method: first, adjust the bending needle and machine needle hook line time, generally adjust the left needle (long straight needle), and then adjust the gap between the bending needle and the long straight needle. When the left needle wire ring of the needle hook is checked, the eye of the needle and the curved needle are reconnected. When the thread is inserted, the bending needle returns, and the needle drops. The overlap between the pinhole of the left needle position machine and the needle pierced hole indicates that the synchronous relationship between the needle and the bending needle is correct.

In addition, it is also important to note that the bending needle did not hook to the left needle ring, or the left needle did not insert into the curved triangular wire ring.

　　 Fault diagnosis of main board and computer board of needle checking machine

As the key part of the needle checking machine, the main board and computer board of the needle checking machine are usually installed in the machine. inside Unlike mechanical components, failure can not be judged by naked eye observation.

Then can we really check and judge whether there is any malfunction in the needle checking machine? The answer is No. The author thinks that if the main board or the computer board of the target needle machine has a technical fault, we can still effectively diagnose the faults through other phenomena or characteristics of the device.

Next, the author analyzes the failure of the main board and computer board of the needle checking machine respectively.

　　 Judgement of motherboard damage

For the failure of the main board of the needle checking machine, we can judge the following two ways:

1. when the device detects any iron object, the machine works but does not alarm. 2. when the broken needle is detected, the position indicator light is not lighted.

　　 Computer plate damage

If the computer plate of the needle machine is damaged, we can judge the following 4 ways:

1. motor is not running; 2. alarm does not alarm; 3. can not set normal parameters; 4. devices do not count. {page_break}

　　 A clever solution to noise failure of round head keyhole machine

According to the author's analysis, the main reasons for the noise of the round head keyhole machine are: the machine is short of oil, the machine parts are loose or worn, and the parts are changed.

In view of the above causes, the author suggests that the following methods should be taken separately: add professional lubricants to the key parts of the machine parts, tighten the loose parts and tighten them up according to the standards, replace the brand-new parts for the worn parts, and adjust the changes according to the specifications, until all the parts are properly adjusted.

　　 The upper and lower layer misalignment maintenance of seam sewing machine

According to the actual maintenance experience of the sewing machine for many years, the author suggests that the following points should be effectively adjusted for the dislocation of the upper and lower layers of the sewing machine.

1. we must make sure that the material is not easy to slide.

2. the bottom of the foot may not be smooth enough, so the press foot should be grind and polish.

3., the pressure should not be too big. We should adjust the pressure to the minimum that can send the sewing material.

4. the feeding synchronization is too late. We can re adjust the feeding synchronously according to the standard.

5. if the cloth tooth is too dull, then we can grind or replace the new delivery tooth.

6., we can adjust the delivery teeth to the front and lower settings, which will increase the effect of the cloth.

　　 How to solve flat nose keyhole machine can not cut the line?

In view of the problem that the scissors of flat head keyhole machine can not cut to the line, according to the author's years of operation experience analysis, we think that we can do the following operation to deal with:

If the flat end keyhole machine can not cut the line, then check whether the cutter is aligned on the line. In addition, after cutting the line, we will see if we can clip the line to ensure that we do not drop the line.

It is worth noting that we also need to adjust the position of the scissors, loosen the two screws of the upper shear line control rod, and then adjust it before and after.

Under the two screws, there are two position datum lines, thick lines and thin lines. As we all know, fine lines are suitable for sewing thin materials, while thick lines are mainly used for sewing thick materials.

After adjusting, we also need to tighten the two screws on the upper shear line control rod. Then the author thinks that the failure phenomenon of "not cutting the line" can be easily ruled out.