Anti-cloth-cutting device used for sewing machine and control method of anti-cloth-cutting device

Abstract

The invention provides an anti-cloth-cutting device used for a sewing machine and a control method of the anti-cloth-cutting device. The device includes a data acquisition module, a protection threshold setting module, a sewing needle counting and timekeeping module, a judging module and a post-trimming execution module, wherein the data acquisition module is electrically connected with a first cloth detection sensor and a second cloth detection sensor. The post-trimming execution module is used for executing post-trimming when the data acquisition module receives a control signal output after the second cloth detection sensor outputs a signal and a control signal output by the judging module. According to the device and the method, only when the control signal output after the second cloth detection sensor outputs the signal and the control signal output by the judging module are received by the data acquisition module, can the post-trimming execution module execute post-trimming so that it can be ensured that well-sewn cloth is avoided from being cut by mistakes and whether the cloth becomes warped or is folded does not need to be worried about.

Description

Technical field [0001] The invention relates to the field of sewing machines, in particular to a cut-proof cloth device for sewing machines and a control method thereof. Background technique [0002] In the process of sewing fabric with an industrial sewing machine, or after sewing, it is often necessary to perform automatic thread trimming. Thread trimming is generally divided into front trimming and post trimming. Front trimming refers to trimming the thread at the front end of the fabric at the beginning of sewing, and post trimming refers to trimming the thread at the end of the fabric at the end of sewing. In order to realize the automation of the industrial sewing machine, the aforementioned front and rear thread trimming have also been automated. For example, the patent application number is 201410475488, and the patent application titled Sewing Machine and Automatic Thread Trimming Device discloses a sewing machine with an automatic thread trimming device. The sewing ma...

AI Technical Summary

Problems solved by technology

However, when the sewing machine is conveying the fabric, the fabric may not be close to the sewing table of the sewing machine, but may be warped.

At this time, the fabric may not effectively block the corresponding fabric detection sensor, so that the sewing machine thinks that the fabric has left, that is, the thread is trimmed after execution. At this time, the fabric is often cut, causing damage to the sewn fabric.

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