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Troubleshoot the "stuck" of the eccentric wheel of the lockstitch sewing machine

                       
Update:2021.12.2021-12-02T16:11:33+00:00
Summary:

Regular maintenance is very necessary for any sewing eq […]

Regular maintenance is very necessary for any sewing equipment. If we maintain the equipment regularly, we can avoid many failures.
This article focuses on the analysis of the eccentric wheel "stuck" problem caused by the inadequate regular maintenance of the lockstitch sewing machine.
Regular maintenance is very necessary for any sewing equipment. If we do regular maintenance, then we can effectively avoid the problem of machine jamming due to lack of oil or other untimely maintenance.
I have encountered too many similar problems. According to the experience of Jiquan, most of the lockstitch sewing machines are stuck between the feeding eccentric and the feeding connecting rod and the lifting connecting rod. There is basically no problem in other parts. , Even if it is stuck, it is easy to rule out.
Next, we will analyze the solution to the jamming of the feeding eccentric wheel of the lockstitch sewing machine. Check whether the feeding eccentric wheel is jammed
We first loosen the nut, take out the shaft screw of the gear lifting connecting rod, so that the gear lifting connecting rod is disconnected, and try to take out the feeding connecting pin next to the feeding connecting rod, so that the feeding connecting rod is disconnected. Afterwards, we can turn the hand wheel back and forth by hand, if it can rotate a little, and drive the tooth lifting link and the feeding link, and it can be seen that the lower end of the two links swings with the rotation of the powder hand wheel, and the two links are swayed by hand. At the lower end, you will find that the upper shaft rotates with the swing of the powder two connecting rods, which indicates that the feeding eccentric has been stuck. Solve the problem of stuck feeding eccentric wheel
First of all, we open the back cover of the lockstitch machine in accordance with scientific operating standards, and fully lubricate the eccentric wheel. During operation, we need to allow the oil to infiltrate. It is strictly necessary to use a sponge to absorb enough oil and place it on the adjacent position of the eccentric for several hours or longer.
Then, we grasp the handwheel with our hands, and the other hand takes turns to force the lower end of the two connecting rods until the two connecting rods move from small to large, so that the handwheel can turn one round. When the handwheel can turn one round, we install the lower end of the two connecting rods and turn the handwheel 360 degrees by hand. When the V-belt can drive the handwheel to rotate, we refuel all the rotatable parts of the machine.
Next, we can turn on the power to start the machine at the slowest possible speed, and then increase the speed after a period of no load. If no abnormality is found, it means that the problem of the machine stuck has been resolved.
If after a long period of running and running-in, the lockstitch sewing machine is still not running along the width or running to a certain part, or the loud noise will affect normal sewing. The author recommends that it is better to replace the new feeding eccentric wheel.

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