Sewing machine and sewing machine control method

Abstract

The invention relates to a sewing machine and a sewing machine control method. A first sensor, a second sensor, a third sensor, a fourth sensor and a fifth sensor which are sequentially arranged in a sewing area in the cloth advancing direction are used for collecting position signals in the working process of a sewing machine, judging the types of cloth to be cut, and sending a thread cutting instruction according to different cloth types; and therefore, unnecessary waste caused by the fact that the tip end of cloth is cut off when the cloth with the two triangular ends is subjected to thread cutting is avoided.

Description

technical field [0001] The present application relates to the technical field of sewing machines, in particular to a sewing machine and a sewing machine control method. Background technique [0002] At present, when the sewing machine is sewing, a front braid will be formed at the front end of the cloth to be sewn, and a rear braid will be formed at the rear end of the finished cloth. This requires trimming of the front braids at the start of the sewing machine and trimming of the rear braids at the end of sewing. [0003] In the prior art, the automatic thread trimming sewing machine generally uses a photoelectric cross-beam sensor for induction. When the fabric passes through the sensor, it is judged and controlled by the electric control. Thread trimming function now. The thread trimming method of existing sewing machines is generally machete thread trimming or side suction knife thread trimming. Fabrics with a normal front end flush shape can be sewn and threaded norma...

AI Technical Summary

Problems solved by technology

The thread trimming method of existing sewing machines is generally machete thread trimming or side suction knife thread trimming. Fabrics with a normal front end flush shape can be sewn and threaded normally, but since the sensor position distribution is generally linear, when the fabric is triangular For fabrics, it is easy to cut off the front end of the triangle by mistake when trimming the thread before, and it is easy to cut off the rear end of the triangle when trimming the thread backward

This problem will lead to the scrapping of the user's fabric, resulting in losses, and the normal sewing and thread trimming of the triangle fabric cannot be performed.

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