What should I do if the bottom line of the sewing machine will skip the needle, how to adjust it so

Causes and treatment methods of skipping needles in sewing machine:

1. Upper bent needle and thread skipping stitch:

The positioning of the needle and the upper curver needle is inaccurate; reposition of needles and loopers; The gap between the needle and the upper bend needle is too large; Reposition the bent needle; The relationship between the needle and the crochet needle is wrong; the relationship between high-speed needle and crochet needle; Stringing errors; Re-stringing correctly; The needle is installed incorrectly; Reinstall the pin correctly; The control pressure is too strong or too weak.

high-speed control line strength; The tip of the crochet hook is damaged to the raised head; Remove the hair or replace it with a new one. needle bending; Replace it with a new product; The ejector pin piece is installed incorrectly; Reinstall the ejector pin piece correctly.

2. Downbent needle and thread skipping stitch:

needle bend or needle tip hair; Replace needle 2, needle direction is not correct; Adjust the eye of the needle.

direction, so that the needle groove is aligned with the operator; The bent needle is not sharp; grinding or swapping the looper needle; The guard plate is not properly installed; Adjust the position of the wire guard plate so that the wire guard plate is close to the needle; The height of the needle is not positioned accurately; repositioning by standard; The gap between the lower bent needle and the machine needle is too large; Readjust the gap according to the standard.

Improper selection of needles and sutures, too thick needles, too thin threads; Correct selection of needles and threads; The return volume and height of the lower bending needle are incorrect; Adjust the left limit size of the needle and the tip of the bend needle and the height of the bend needle to meet the standard.

3. Interlace skip pins:

The gap between the upper and lower loopers is too large; Enlarge the declination angle of the upper or lower bend needle installation position; The tip of the upper curver needle has been blunted; Replace the upper looper; The protruding part of the back of the lower bend needle is severely worn; Replace the lower looper.

4. Chain line skipping needle:

The chain line crochet needle is not positioned accurately; Adjust the position of the chain crochet needle; The position of the chain wire pick-up rod is not adjusted, so that the line of the chain line crochet cannot be closed, and the line identification cannot be generated; Adjust the position of the chain thread take-up rod to achieve the braid stitch when the sewing material is interrupted; The pressure of the chain wire looper clamp plate is too loose; Micro tightening chain wire, looper wire, clamp nut; Incorrect return amount or height of the chain crochet hook; Recalibrated to standard.

Causes of faults and how to deal with them.

Upper looper thread skip stitch.

1. The positioning of the needle and the upper bending needle is inaccurate; Readjust the position of the needle and the looper 2, the gap between the needle and the upper looper is too large; Readjust the position of the bent needle 3, and the relationship between the needle and the crochet needle is wrong; The relationship between high-speed needle and crochet needle 4, threading error; Re-stringing correctly;

5. The needle is installed incorrectly; Reinstall the pin correctly;

6. The control line pressure is too strong or too weak; high-speed control line strength;

7. The tip of the crochet needle is damaged to the fluffy head; Remove the hair or replace it with a new one.

8. The needle is bent; Replace it with a new product;

9. The thimble piece is installed incorrectly; Reinstall the ejector pin piece correctly.

Down-looped needle thread skip stitch.

1. Needle bend or needle tip hair; Replace the needle.

2. The needle direction is not correct; Adjust the direction of the needle eye, so that the long groove of the needle is aligned with the operator 3, and the needle head of the downward bend needle is not sharp; Grind the lower looper needle or replace it 4, and the wire guard plate is not installed; Adjust the position of the wire guard plate, so that the wire guard plate is close to the needle 5, and the height of the needle is not accurate; repositioning by standard;

6. The gap between the lower bending needle and the machine needle is too large; Readjust the gap according to the standard 7, improper selection of needles and sutures, the needle is too thick, the thread is too thin; Correct selection of needle and thread 8, the return amount and height of the lower bending needle are incorrect; Adjust the left limit size of the needle and the tip of the bend needle and the height of the bend needle to meet the standard.

Interlace skip pins. 1. The gap between the intersection of the upper and lower bent needles is too large; Enlarge the declination angle of the upper or lower bend needle installation position;

2. The tip of the upper looper needle has been blunted; Replace the upper looper;

3. The protruding part of the back of the lower bending needle is seriously worn; Replace the lower bent needle chain line skip needle 1, the chain line crochet needle positioning is not accurate; Adjust the position of the chain line crochet 2, the position of the chain line take-up rod is not adjusted, so that the line of the chain line crochet can not be closed, and the line identification can not be generated; Adjust the position of the chain thread take-up rod to achieve the braid stitch when the sewing material is interrupted;

3. The pressure of the chain wire looper clamp plate is too loose; Micro tightening chain wire looper wire clamp nut 4, the return amount or height of chain wire crochet needle is incorrect; Recalibrated to standard.

The reasons for not hooking the line are as follows: 1. The height of the noodle line is high, and the noodle line should be lowered a little 2. The needle is reversed, and the thread is not worn right (the hole is not worn, and the looper is worn. What to do with the jumper of the sewing machine 1

The solution is to adjust the relative position of the needle and the lower looper, so that the lower looper can be inserted into the needle loop; 2.The lower looper can not hook the upper looper, it is the loop that the upper looper does not hang the upper looper, the solution:

Adjust the position of the upper looper so that the loops of the looper can hang the loop;

The main reason for the old breaking of the needle thread of the sewing machine is that the thread is too tight. When the wire is tightened, the wire of the winding board is pressed too tightly. Second, the crimping board is pressed too tightly.

The solution is to loosen the screws of the crimping plate. Then it's about loosening the thread on the spool. The sewing machine has a long hole in the needle, while the sewing needle is just the opposite, even if it is installed upside down, it cannot be used because of the size, distance, and needle tip is wrong.

It's normal, it's tightly mechanical, and it's not a substitute.

The pressing plate is pressed on the edge of the rolled blanket, and there should be an appropriate amount of compression to facilitate the tightening of the stitches, and the pressing plate is too high, and the stitches are loose and broken, which should be appropriately low, and the position of the supporting plate should not be too low. In addition, the needle, hook, needle board, and supporting board must not have burrs.

If the lock position is not in place, you have to jump the zigzag position to the maximum position, and then turn the first round with your hand to see if you will hit the presser, and if not, it should be fine. The bottom line is kneaded into a ball because the bottom line is loose, or the noodle thread is too loose, just adjust the cotton thread a little tighter.

Household sewing machines integrate functions such as straight stitches, zigzag seams, keyholes, etc., and are generally driven by manpower (foot pedal, hand drive), and also driven by electric motors. According to the daily application, there are types of household sewing machines, such as straight line sewing machines and zigzag stitch sewing machines.

Three-thread overlock sewing machine jumper generally has the following two situations:

1.The lower bend needle can not hook the thread, because the lower bend needle does not hook the needle needle loop, solution: adjust the relative position of the needle and the lower bend needle, so that the lower bend needle can be inserted into the needle loop;

2.The lower looper can not hook the loop of the upper looper, and the loop of the upper looper does not hang the upper and lower loopers, and the solution: adjust the position of the looper to make the loops of the looper can hang the loop;

3.The needle is not inserted into the loop sent by the upper looper, and the relative position of the upper looper and the needle is adjusted.

There are many reasons for jumpers, you also need to check whether the needle is bent, whether the direction is correct, and whether the fit of each part is loose.

3. Needle tip hairs of the lower looper; Grind the tip of the lower looper needle or replace the lower looper 4, and the feeding tooth has a sharp edge; Regrind or polish the feed tooth surface.

5. There are burrs on the edge of the small needleboard; The edge of the small needle board is trimmed or polished6, and the thread quality is poor; Use a good quality thread instead.

7. The thickness of the thread is uneven or thicker than that of the needle; 8. Wrong threading for appropriate needles and threads; New correct stringing.

9. The control line pressure is too strong; Adjust the strength of the control line.

10. The needle is installed incorrectly; Reinsert the needle correctly.

11. The wire frame is wrong to cross the line; Reassemble the cable frame so that the wire passes through itself.

13. The control piece has been rough; Polished with a sandbula slip.

The underneath looper and face needle should have been in contact when walking.

The main reason for the old breaking of the needle thread of the sewing machine is that the thread is too tight. When the wire is tightened, the wire of the winding board is pressed too tightly. Second, the crimping board is pressed too tightly. The solution is to loosen the screws of the crimping plate. Then it's about loosening the thread on the spool.

The needle and thread of the sewing machine should be easy to break because it is not installed properly when it is installed.

This may be that your needle and upper looper are not aligned, you can readjust the position of the needle and looper, so that it will not be easy to break.

The total break of the needle thread of the sewing machine may be due to the inaccurate positioning of the needle and the upper looper, and the position of the machine and the looper may be readjusted.

This time has taken more than half past nine, and the surge line will definitely be broken.

The lock line is good, and it can't be locked when it is put on the cloth, and it is loud.

See if the needle is correct, change the needle, and then see if there is a problem with the thread, if it doesn't work, call someone to repair it!

Because it's reversed, you need to change the needle.

I haven't used a sewing machine, so I don't know why it always disconnects.

The line is tight, let's see if the line is okay.

1. If there is a problem with the jumper, you can replace it with a new jumper. 2. If there is a certain gap when the bending needle moves, the screw can be adjusted and completely fixed. 3. Then, check whether the position of their upper looper and machine needle is bent, and if it is bent, adjust it.

Precautions for edging machine 1, when using, be sure to understand its manual first, and then operate according to the above introduction, so that there will be no problem. If not, you can follow the online tutorial or contact the relevant after-sales personnel of the mall to ask for information. 2. When using, tighten all the screws before use, so as not to loosen the belt and change the jumper, which cannot be used normally.

3. If the sewing machine has jumpers or makes some abnormal noises when in use, the operation must be stopped, and the overall sail beam must be checked to see what is the cause, and then adjusted before use. 4. If some accessories on the sewing machine are broken or cannot be used normally. You can contact a professional to repair or adjust, or you can replace the accessories yourself to see if it can be used normally.