Troubleshooting of Button sewing machine

Jul 18, 2022

A broken needle of a Button sewing machine

Broken needles, regardless of the model of an industrial sewing machine, are mostly due to improper positioning. The causes and remedial measures of the faults are shown in Table 1.

Table 1 Reasons for Broken needle and Removal Methods

Reasons

Removal Methods

1. Buttonholes vary in width, size, and position asymmetrically in four holes

1. Replace standard buttons

2. Misalignment of machine needle and buttonhole

2. Adjust according to the criteria

3. Moving position of clip

3. Correct clip position

4. Needle rod too low

4. Properly raise the needle bar

5. The swing width of the needle bar does not meet the actual needs

5. Readjust according to the standard (GJ4-2 type)

6. Needle guard plate (the stop is in the wrong position)

6. Readjust the clearance

7. The horizontal feeding or longitudinal feeding distance is incorrect

7. Adjust the distance according to the buttonhole (type 373)

8. The button clip cannot clamp the button firmly

8. Readjust the opening distance of the button clamp

9. The position of the wire hook is incorrect

9. Readjust the position of the hook

10. The needle bar is bent or the pinhole is inclined

10. Replace the needle bar

11. If the positioning of the worm is not correct, the machine needle should stop the horizontal and vertical movement before inserting it into the New York hole

11. Reposition the worm and replace the pin (GJ4-2 type)

12. The swing time and front and rear position of the thread pushing fork shaft are incorrect

12. Adjust the turning crank to the appropriate position (when the needle bar rises and moves 20-21mm from the lowest position, the thread pushing device rotates backward) (GJ4-2 type)

Skipping stitch of Button sewing machine

The fault of needle skipping can be found in the principle of thread hooking. Once the cause is found, it is not difficult to eliminate the fault. The fault causes and troubleshooting of needle skipping are shown in Table 2

Button sewing machine

Table 2 causes and troubleshooting of needle skipping

Reasons

Removal Methods

1. The front and rear clearance between the needle and the hook is too large

1. Adjust to 0.05-0.1mm

2. The needle bar is too high

2. Press the needle bar to position and readjust

3. Thick needle and thin thread or thick needle and thin thread

3. Select needle and thread according to sewing material

4. The needle is bent, deflected or the needle handle is not inserted into the bottom

4. Replace the needle and reinstall the needle

5. The timing of thread hooking is too early, and the needle jumps on the right

5. Adjust the thread hooking time to hook the thread after the needle throws out the thread loop

6. The timing of thread hooking is too late, or the acceleration time of thread hook is too late, and the needle jumps on the left

6. Readjust according to the standard

7. The position of the button clamp is incorrect, and the hole of the machine for the button clamp has deviated

7. Readjust the position of the button clamp

8. The button clamp pressure is small or the three claw pressing material is uneven, and the sewing material floats up and down with the needle

8. Increase the button clamp pressure and adjust the three claws to press the material evenly

9. The machine needle touches the buttonhole

9. The needle should fall into the center of the buttonhole

10. The hook shaft is loose in front and back

10. Adjust the hook clearance (GJ4-2)

11. The wire hook tip is damaged

11. Replace the new wire hook

12. The operation time of pushing the fork is incorrect

12. Readjust according to the standard

Previous: What fields are electronic pattern sewing machines suitable for?

Next: Common fault of Button sewing machine: broken thread