Cloth edge control method in sewing process

A control method and sewing technology, applied in the field of sewing, can solve problems such as discontinuous instructions, complex algorithms, poor reliability, etc., and achieve the effect of beautiful stitches, easy realization, and accurate judgment

Active Publication Date: 2019-12-17
JACK SEWING MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, the implemented algorithm is more complicated and less reliable, and the control unit controls the forward rotation, reverse rotation and stop of the end mechanism through a series of settlement and judgment.
While the judgment is more complicated, it will also increase the possibility of misjudgment. In addition, due to the discontinuity of the command, the end adjustment mechanism will act intermittently, which will cause serious vibration.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Cloth edge control method in sewing process
  • Cloth edge control method in sewing process
  • Cloth edge control method in sewing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] In this embodiment, the specific method for the control unit in step 1) to control the movement of the selvedge adjustment mechanism is: the control unit calculates the cloth feeding speed coefficient in real time according to the preset spindle speed and needle pitch value of the sewing machine, and, according to The current signal value and the aforementioned average value are used to calculate the size and direction of the reference value of the edge adjustment speed, and the reference value of the edge adjustment speed is multiplied by the cloth feeding speed coefficient to obtain the operating speed of the driving device in the edge adjustment mechanism, and the control unit Outputting control commands to the driving device to make the driving device adjust the selvedge according to the running speed; if the driving device is a motor, the running speed of the driving device is the running speed of the motor.

[0054] The specific calculation process of the running s...

Embodiment 2

[0062] The specific judgment process of fluff or gap in the above step 2) is:

[0063] The fabric detection sensor detects the fabric in real time. When there are fluff or gaps in some positions of the fabric edge, the return value (ie, the current signal value) detected by the fabric detection sensor will be significantly larger or smaller. Record the current signal value as f m , if no corresponding measures are taken, even if the cloth is in the correct position at this time, it will be adjusted in one direction. At this time, after comparing the average value calculated according to the above-mentioned moving average algorithm with the current signal value, if the deviation value exceeds the preset threshold range in the control unit, it is judged that there may be fluff or gaps here. At this time, The control unit outputs relevant signals, and the selvedge adjustment mechanism stops acting. The control unit reads the pre-set fluff or notch recognition distance l, and re...

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Abstract

The invention provides a cloth edge control method in a sewing process. According to the method, by detecting whether or not a significant deviation exists in a signal value fed back by a cloth detection sensor, it is judged whether or not fluff or a notch exists, wherein the judgment is simple, convenient and accurate, so that a control algorithm of the cloth edge control method in the sewing process is easy to implement; in addition, the control method is smoother overall, logical judgment is reduced, the reliability is higher, and because average value return exists, while the speed changeof a cloth edge adjustment mechanism is smooth, the vibration of the cloth edge adjustment mechanism is smaller, and stitching is more attractive.

Description

technical field [0001] The invention relates to the technical field of sewing, in particular to a selvedge control method in the sewing process. Background technique [0002] During the sewing process of the sewing machine, in order to keep the seam margins of the two overlapping pieces (cloth) consistent and sew together, generally there is a setting on the upper surface of the needle plate to make the cloth in the direction crossing the feeding direction. Moving upper cloth control device and lower cloth control device. [0003] For the sewing machine with the above functions, in order to avoid the influence of gaps and fluff on the sewing effect, the following methods are used to achieve selvedge control: [0004] As disclosed in Japanese Patent Application Publication No. 6-121887: the device arranges the cloth end detection points using optical fibers in a direction perpendicular to the cloth feeding direction, based on the detected changes in the cloth end position an...

Claims

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Application Information

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IPC IPC(8): D05B19/16
CPCD05B19/16D05D2305/32
Inventor 卢明安管建平黄明学丁建明
Owner JACK SEWING MASCH CO LTD
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