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A method for finding and stopping the needle position of an industrial sewing machine

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

Active Publication Date: 2021-01-29
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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  • A method for finding and stopping the needle position of an industrial sewing machine
  • A method for finding and stopping the needle position of an industrial sewing machine
  • A method for finding and stopping the needle position of an industrial sewing machine

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 and stopping the needle position of an industrial sewing machine, including a motor, a detection module and a control module; the method includes the following steps: after the industrial sewing machine is powered on, when the detection sensor outputs the first signal, the control module first The motor rotates forward at the first preset angle; then the control module judges whether the motor is at the reference position according to the output signal of the detection sensor; The control module controls the motor to rotate forward at the second preset angle, so that the motor stops at the upper needle stop position; when the detection sensor outputs the second signal, the control module controls the motor to reverse until the control module judges that the motor is located at the reference position according to the output signal of the detection sensor. position; after that, the control module controls the motor to reverse α°, so that the motor stops at the upper needle stop position. This application prevents the sewing machine from taking one or two more stitches when the machine is turned on to find the upper needle stop position, and eliminates the potential safety hazard of stabbing the operator.

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 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 pric...

Claims

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Application Information

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