How To Repair Double Needle Pendulum Sewing Machine

The double needle crevice sewing machine is a relatively simple flower color machine.

It is widely applied to decorative sewing in clothing, shoes and hats, underwear, gloves, leather, luggage and other industries.

This type of machine is

The single spindle hook and the wire ring are not well formed, which brings great challenges to maintenance and debugging.

The most common faults of this type of machine are rolling line, jumping needle, needle tip hair and so on.

When the new machine is used, the phenomenon of rolling line is very common.

Because users usually use the light wire that is slightly thicker than the ordinary sewing thread to enhance the decorative effect.

Plus double needle operation, that is to say, two threads of light must pass through the shuttle at the same time.

In general, the clearance of the new shuttle is very tight, so it happens when the rolling line is rolled.

Therefore, it is necessary to grind with the grind sand to make the shuttle clearance slightly milled, and it is not easy to thread the thread.

In addition, this type of needle jumping phenomenon is also more common.

Because there is a large time difference between the swing of the needle and the left limit and the right limit position, there is a high demand for debugging.

General reality

When the left needle is on the left limit, the upper limit of the hook line position on the pinhole is the best. At the same time, the pick-up rate of the right needle should be at least 1.5mm at the right limit.

When the special fabric is encountered, the clearance between the left needle and the shuttle spindle can be adjusted into tangent state, and the matching gap of the right needle can be adjusted to a slight collision state to make up for the difficulty of marking due to the small wire ring.

What I want to mention here is that when I contacted many similar machines, I found that their revolving drive gears were spur gears, and many of the 20u series single needle cramp sewing machines were driven by differential gears, which could make up for the bad time of thread drawing and stable sewing performance.

Therefore, it is suggested that the manufacturer adopt differential gear pmission on the 457d type.

As for the reason why the needle tip is hairy, it is mainly caused by the shuttle spindle at random.

The outer edge of the shuttle core is not easy to collide with the tip of the needle, and the effect is good.

In addition, if the wire over the spindle sleeve is bent to the inside, the utilization rate of the fabric will be improved. In this era of soaring prices, the left and the right ends of the needle and the lower bending needle should be adjusted to meet the standard.

Computer controlled automatic sewing machine can replace manual labor, sewing the clothes designed by one needle and thread, touching the tip of the needle, and breaking the needle seriously, so we should also pay attention to it.

For this type of machine, as long as the delivery time and the needle time are flexibly adjusted, the movement part is short of oil due to the fault of the oil circuit system.

The market is the first. Big market and big boss, from the long-term development strategy, enterprises should take the initiative to open up the "horse drawn carriage" of many markets at home and abroad, so that we can adjust the triangular needles with different shapes.

For example,

The time is adjusted to the machine needle will leave the sewing material and has not yet completely left when it starts to swing, so the triangular needle shape is different from the standard pointer.

In short, any device can flexibly debug under the premise of grasping the principle, so that it can meet the needs of different users.