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Sewing machine and control method of sewing machine

A technology of sewing machine and cloth feeding mechanism, which is applied in the direction of control device for sewing machine, sewing machine element, program-controlled sewing machine, etc.

Active Publication Date: 2014-09-03
BROTHER KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, conventional sewing machines cannot keep the driving of the main shaft and the driving of the cloth feeding mechanism in synchronization with changes in the rotational speed of the main shaft.

Method used

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  • Sewing machine and control method of sewing machine
  • Sewing machine and control method of sewing machine
  • Sewing machine and control method of sewing machine

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Embodiment Construction

[0046] A first embodiment 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.

[0047] The sewing machine 1 has a base portion 2 , a pillar portion 3 , and an arm portion 4 . The machine base portion 2 is a base of the sewing machine 1 . The stand part 2 is attached to the recessed part (illustration omitted) of the upper surface of the table 20 from above. The pillar portion 3 extends vertically upward from the right end of the base portion 2 . The arm part 4 extends leftward from the upper end of the pillar part 3 and faces the upper surface of the stand part 2 . The machine arm 4 is provided with a presser foot 17 below the left end. The machine arm part 4 holds the needle bar 7 inside, and th...

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PUM

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Abstract

The invention relates to a sewing machine and a control method of the sewing machine which use their respective motors to drive a main shaft and a cloth feeding mechanism. The sewing machine has a main motor and a cloth feed motor. The main motor drives the spindle. The spindle moves the sewing needle up and down. The cloth feeding motor drives the cloth feeding mechanism. The power transmission mechanism of the sewing machine converts each rotation of the output shaft of the cloth feed motor toward one direction and opposite direction into a swing motion of the cloth feed mechanism swinging back and forth horizontally once, and transmits the power of the cloth feed motor to the cloth feed mechanism. The CPU of the sewing machine detects the main rotation angle (S11). The main rotation angle is the rotation angle of the output shaft of the main motor. The CPU detects the cloth feeding rotation angle (S13, S19). The cloth feed rotation angle is the rotation angle of the output shaft of the cloth feed motor. The CPU calculates the rotational speed instructed to the feed motor by using the main rotation angle and the feed rotation angle ( S16 , S22 ).

Description

technical field [0001] The invention relates to a sewing machine and a control method of the sewing machine which use their respective motors to drive a main shaft and a cloth feeding mechanism. Background technique [0002] There is a sewing machine in which a main shaft and a cloth feeding mechanism are driven by separate motors. Since this sewing machine can freely control the cloth feed amount, various patterns can be easily sewn. In the sewing machine disclosed in Japanese Patent Laid-Open No. 92444 of 1979, cloth feed teeth are connected to the output shaft of the cloth feed motor. The cloth feeding motor is a stepping motor. If the cloth feed motor makes the output shaft reciprocate once within the specified angle range, the cloth feed teeth reciprocate once in the horizontal direction. [0003] When utilizing respective electric motors to drive the main shaft and the cloth feeding mechanism, the sewing machine needs to keep the driving of the main shaft and the dr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D05B27/02D05B69/02D05B19/16
Inventor 加藤雅史竹村彻
Owner BROTHER KOGYO KK
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