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Control method of sewing machine

A control method and sewing machine technology, applied in the direction of sewing machine control devices, sewing machine components, sewing equipment, etc., can solve the problems of sewing material thickness difference, broken needles, etc., and achieve the goals of avoiding broken needles, fast speed, and improving response speed Effect

Active Publication Date: 2021-07-06
JACK SEWING MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned control scheme requires tens of milliseconds from the motor speed signal detection, signal processing, and the final machine to make a corresponding response, and there is a certain delay problem, resulting in broken needles.
[0005] In addition, the above control scheme can only detect the difference in the thickness of the sewing material

Method used

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  • Control method of sewing machine

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In this embodiment, the above-mentioned current threshold value is a set fixed value, which can be divided into several step values, which match with the corresponding operating speed of the driving motor. That is, in this embodiment, the controller stores a table corresponding to the current threshold and the operating speed of the driving motor, and different current thresholds correspond to different operating speeds of the driving motor. The controller detects the current operating speed of the driving motor, and according to the current operating speed The speed calls the corresponding current threshold. In this embodiment, the current threshold value is obtained through the current operating speed of the drive motor, so as to adapt to the thickness of the sewing material.

[0028] During the sewing process, when sewing the first stitch, if the current current value of the driving motor collected in real time is greater than the above-mentioned current threshold va...

Embodiment 2

[0031] The acquisition method of the current threshold in this embodiment is different, and the specific acquisition process is: during the sewing process, when sewing the first stitch to the Nth stitch, the controller only collects the current value of the drive motor corresponding to each needle , and calculate the average current value of the N needle, and set the average current value of the N needle as the current threshold. N in this embodiment may be a natural number greater than 1.

[0032]After the current threshold is obtained, starting from sewing the N+1th stitch, the controller compares the current current value of the driving motor collected in real time with the current threshold. If the current current value of the driving motor collected in real time is greater than the current threshold value calculated above, the controller controls the running speed of the driving motor to decrease, and this continues until the N+nth stitch is sewn, the current current valu...

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Abstract

The present invention provides a control method for a sewing machine, which includes: pre-storing the rotation threshold value during the rotation process of the drive motor driving the needle movement, the rotation threshold value includes a first threshold value and a second threshold value, and the position rotated by the drive motor is within the first threshold value When the needle is between the first threshold and the second threshold, the needle finishes piercing the sewing material; during the sewing process, the controller detects that the current rotational position of the drive motor is between the first threshold and the second threshold, and controls The controller collects the current current value of the driving motor in real time, and compares it with the preset current threshold value. If the current current value is greater than the current threshold value, the controller controls the driving motor to reduce the operating speed or outputs a stitch size adjustment command. The invention improves the response speed and achieves good effect.

Description

technical field [0001] The invention relates to the technical field of sewing machines, in particular to a control method of the sewing machine. Background technique [0002] Existing sewing machines always maintain a certain rotational speed for sewing during the sewing process. When threading and sewing heavy materials, the rotational speed cannot be adjusted, and the original rotational speed is continuously maintained for sewing, which produces a series of sewing machine performance. Reduced, poor sewing quality, reduced machine life, and often the situation of too thick and stuck cloth. Therefore, it is necessary to control the speed of the sewing machine in real time according to the change of the thickness of the cloth, so as to prevent the cloth from being too thick or stuck. [0003] Patent 201510586905.6 discloses a sewing machine and a control method of the sewing machine. The sewing machine can control the maximum rotational speed during sewing according to the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D05B69/18
Inventor 王明敏潘建国卢明安
Owner JACK SEWING MASCH CO LTD