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Method for finding needle stopping position of industrial sewing machine after being on

A technology of industrial sewing machine and needle stop position, which is applied to sewing machine components, sewing machine control devices, sewing equipment, etc., can solve the problems of easily stabbing the operator and potential safety hazards, and achieve the effect of eliminating potential safety hazards

Active Publication Date: 2019-07-12
ZHEJIANG ZOBOW MECHANICAL & ELECTRICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when using the above method to find the upper needle stop position when starting up the machine, it is necessary to first rotate a circle to find the reference position and know the current mechanical angle before finding the upper needle stop position. In the case of one or two stitches, it is easy to stab the operator, which poses a safety hazard

Method used

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  • Method for finding needle stopping position of industrial sewing machine after being on
  • Method for finding needle stopping position of industrial sewing machine after being on
  • Method for finding needle stopping position of industrial sewing machine after being on

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Embodiment one, as image 3 As shown, the included angle α° between the reference position D point and the upper needle stop position C point is 75°, and the included angle β° between the 0° electrical angle d1 of the motor and the reference position D point is 38°. Industrial sewing machines It is thick material machine H5-4, and the electrical angle Θ° is 90°. In the first embodiment, (Θ° / 3)≤β°, so the first preset angle is 8°, and the second preset angle is 53°. Based on this, after the industrial sewing machine is powered on, the electrical angle of 90° may be the first electrical angle p1 in the first area, or the second electrical angle p2 in the second area, or the third electrical angle in the third area. angle p3. When the detection sensor outputs a low level, the electric control module judges that the electrical angle is 90° as the second electrical angle p2. At this time, the control module controls the motor to reverse to the reference position D, and the...

Embodiment 2

[0036] Embodiment two, such as Figure 4 As shown, the included angle α° between the reference position D point and the upper needle stop point C point is 65°, the included angle β° between the 0° electrical angle d1 of the motor and the reference position D point is 10°, and the electrical angle Θ° is 105°. In the second embodiment, (Θ° / p)>β°, so the first preset angle is 95°, and the second preset angle is 55°. Based on this, after the industrial sewing machine is powered on, the electrical angle of 90° may be the first electrical angle p1 in the first area, or the second electrical angle p2 in the second area, or the third electrical angle in the third area. angle p3. When the detection sensor outputs a low level, the electric control module judges that the electrical angle is 90° as the first electrical angle p1. At this time, the control module controls the motor to reverse to the reference position D, and then the control module controls the motor to reverse for 65 deg...

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Abstract

The invention provides a method for finding a needle stopping position of an industrial sewing machine after being on. The industrial sewing machine comprises a motor, a detection module and a controlmodule. The method includes that after the industrial sewing machine is on, when a detection sensor outputs a first signal, the control module controls the motor to rotate forward by a first preset angle; the control module then judges whether the motor is at a reference position or not according to the output signal of the detection sensor, and if yes, the control module controls the motor to rotate reversely by an angle alpha to enable the motor to stop at an upper needle stopping position; if not, the control module controls the motor to rotate forward by a second preset angle to enable the motor to stop at the upper needle stopping position; when the detection sensor outputs a second signal, the controller module controls the motor to rotate reversely until the control module judges that the motor is at the reference position according to the output signal of the detection sensor; the control module then controls the motor to rotate reversely by the angle alpha to enable the motorto stop at the upper needle stopping position. By the method, the phenomenon that the sewing machine runs by extra one to two needles when finding the upper needle stopping position after being on isavoided, and potential safety hazards of puncturing an operator are eliminated.

Description

technical field [0001] The invention relates to the field of sewing machines, in particular to a method for finding and stopping needle positions when an industrial sewing machine is started. Background technique [0002] At present, with the development of industrial sewing machines, low-efficiency AC induction motors are gradually eliminated in industrial sewing machines, and permanent magnet synchronous motors that save coil excitation and can theoretically save energy by more than 10% are used. For the control of permanent magnet synchronous motor, it is very important to know the position of its rotor. At present, the position sensor is generally used to obtain the rotor position of the permanent magnet synchronous motor. The commonly used position sensors mainly include the following types: Hall sensor, magnetoelectric encoder, resolver, absolute photoelectric encoder, incremental photoelectric encoder, etc. Based on the comprehensive consideration of performance and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D05B69/22
CPCD05B69/22
Inventor 李可徐宗霖
Owner ZHEJIANG ZOBOW MECHANICAL & ELECTRICAL TECH