What is the reason for the hole in the fabric sample during the debugging process of the circular knitting machine? And how to solve the debugging process?

The cause of the hole is very simple, that is, the yarn in the knitting process by more than its own breaking strength of the force, the yarn will be pulled out of the formation of the external force is affected by many factors. Remove the influence of the yarn's own strength, just on the adjustment of the machine in the commissioning process, there are generally the following situations.
1 Feed yarn tension is large
The high yarn feed tension can cause holes in the yarn. When the amount of needle pressure (yarn bending) unchanged, reduce the speed of yarn feeding, will lead to increased yarn tension. At this time, if the yarn feeding tension close to the breaking strength of the yarn, it will produce a hole, but the knitting will continue, when the tension is increased, not only the hole will increase, but also accompanied by the emergence of yarn out of the knitting area, resulting in parking, commonly known as broken yarn.

2 Mismatch between machine number and yarn used

3 When the yarn is bent into a loop by the needles, it will come off the needles and catch on the newly hooked yarn during the next knitting process.

4Yarn guide installation position
If the yarn guide is installed too close to the knitting needles, and the distance is smaller than the diameter of the imported yarn, the yarn will be squeezed between the yarn guide and the needles.

5Adjustment of the position of the floating yarn triangle
In some composite organisation of the knitting process, the most common such as cotton and wool organisation, this needle in the equal ratio of the number of fixed road is to go flat, that is, not to participate in knitting, but at this time these needles to go flat on the needle is still hanging on the coil, for the floating line triangle can be adjusted in and out of the position of the machine, at this time, we need to pay special attention to the floating line triangle of the in and out of position adjustment.
6 double jersey machine needle disc, needle cylinder triangle relative position adjustment

7 Adjustment of bending depth
Other reasons
In addition to the above reasons for knitting, there are some common reasons. For example, crooked needle tongue, excessive needle wear, loose yarn storage belt, excessive fabric tension, tight needle groove, etc.