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Sewing machine and method for controlling sewing machine

A technology for sewing machines and machine needles, which is applied in the direction of sewing machine control devices, sewing machine components, sewing equipment, etc., and can solve problems such as poor sewing quality

Active Publication Date: 2014-04-02
BROTHER KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the sewing quality may deteriorate

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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  • Sewing machine and method for controlling sewing machine
  • Sewing machine and method for controlling sewing machine
  • Sewing machine and method for controlling sewing machine

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Experimental program
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Embodiment Construction

[0029] Embodiments of the present invention will be described with reference to the drawings. figure 1 The upper side, the lower side, the right side, the left side, the front side, and the back side of the paper are the upper side, the lower side, the right side, the left side, the front side, and the rear side of the sewing machine 1, respectively. The sewing machine 1 includes a base portion 2 , a column portion 3 , and an arm portion 4 . The base portion 2 is a base of the sewing machine 1 . The column part 3 extends upward from the right end of the base part 2 . The arm part 4 extends leftward from the upper end of the column part 3 and is opposite to the upper surface of the base part 2 . The machine arm 4 is provided with a presser foot 17 under its left end and holds a needle bar 7 inside. Needle bar 7 is equipped with organic needle 8 at its lower end (referring to figure 2 ). The needle bar 7 and machine needle 8 move up and down along with the driving of the m...

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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PUM

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Abstract

The present invention relates to a sewing machine using different motors to drive a main shaft and a cloth feed mechanism, and a method for controlling a sewing machine, wherein the sewing machine comprises a main motor for driving a main shaft and a cloth feed mechanism motor for driving a cloth feed mechanism, the sewing machine obtains the rotation angles of respective output shafts of the main motor and the cloth feed motor, a CPU is used for driving the two motors, in order to synchronizing the rotation angle of the main motor with the rotation angle of the cloth feed motor, and the CPU calculates a target rotation angle where the output shaft of the cloth feed motor is corresponding to the rotation angle of the main motor, and calculates the deviation between the calculated target rotation angle and the rotation angle of the real cloth feed motor. When the calculated deviation is larger than a threshold, the CPU notifies the condition that the two motors are asynchronous.

Description

technical field [0001] The invention relates to a sewing machine which uses different motors to drive a main shaft and a cloth feeding mechanism and a control method of the sewing machine. Background technique [0002] There is known a sewing machine which utilizes different motors to drive the main shaft and the cloth feeding mechanism. This sewing machine can freely control the amount of cloth feed, so it can easily sew various patterns, but it is necessary to drive the cloth feed mechanism synchronously with the rotation of the main shaft. In the sewing machine disclosed in Japanese Patent Laid-Open No. 228276 of 1993, the cloth feeding start timing is determined according to the rotational speed and the rotational phase of the main shaft, and the determined cloth feeding starting timing is determined according to the cloth feeding amount and the acceleration of the main shaft. fix. Therefore, it is possible to start feeding the cloth at an appropriate timing and stop f...

Claims

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D05B3/02D05B3/04D05B27/22D05B69/00
Inventor 竹村徹
Owner BROTHER KOGYO KK