Automatic sewing machine

A sewing machine and automatic technology, applied in the direction of program-controlled sewing machines, sewing machine components, sewing machine needle holders, etc., can solve the problems of imbalance, torque load increase, pulse motor can not follow the pulse output, etc., to achieve the suppression of imbalance and sewing quality The effect of improving and preventing needle breakage

Active Publication Date: 2008-01-09
JUKI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of recent high-speed sewing machines or when sewing thick or stiff fabrics such as twill fabrics, the pulse motor cannot follow the pulse output, and the torque load increases, causing a problem of so-called imbalance.

Method used

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Examples

Experimental program
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Embodiment Construction

[0045] (The overall structure of the electronic cycle sewing machine)

[0046] Embodiments of the present invention will be described based on FIGS. 1 to 10 .

[0047] In this embodiment, an electronic cycle sewing machine as an automatic sewing machine will be described as an example. The electronic cycle sewing machine is a sewing machine as follows: it has a holding frame as a cloth holding member, and the holding frame holds a sewing object, that is, a cloth, and moves relatively with respect to the sewing needle through the holding frame. Stitches based on predetermined sewing data (sewing patterns) are formed on the material on the holding frame.

[0048] Here, the direction in which the sewing needle 108 described later moves up and down is defined as the Z-axis direction (up-and-down direction), and a direction perpendicular to it is defined as the X-axis direction (left-right direction), and the Z-axis direction and the Y-axis direction are defined as Direction The ...

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PUM

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Abstract

The present invention relates to an automatic sewing sartorius, which implement optimization of sartorius rotary speed and supply time when implementing XY drive to the cloth sewing foot in arbitrary directions through the control of a half closed loop. The sartorius comprises a sewing needle; a orientation unit, which contains a motion quality detecting unit to detect the motion quality of a pulse electromotor which drives a cloth keeping part move to arbitrary positions; a needle position detecting unit, detecting the position of a needle in upper and lower directions; a pattern memory unit, storing sewing pattern data; a motion control unit, to ensure the prescribed difference between the instruction pulse and actual motion, at the same time to output instruction pulses one by one to the pulse electromotor; and a required time memory unit, storing time required for outputting instruction pulse, and time required for motion control unit reference, to begin output the instruction pulse according to the orientation completed by the instruction pulse output when a sewing needle contacts the sewing matter on the needle board.

Description

technical field [0001] The present invention relates to an automatic sewing machine, which has a driving mechanism for moving a cloth holding mechanism to an arbitrary position. Background technique [0002] Currently known is an automatic sewing machine such as an electronic cycle sewing machine that forms a prescribed stitch pattern by forming stitches while moving cloth in X, Y directions based on sewing pattern data. The electronic cycle sewing machine sequentially refers to the movement amount of each needle along the X and Y axes specified in the sewing pattern data, and by driving and controlling the pulse motor by the data, when forming each stitch, it moves along the X and Y axes. The fabric presser foot that moves and holds the fabric in the axial direction realizes the formation of the prescribed stitch pattern. [0003] In the above-mentioned conventional electronic cycle sewing machine, it is known to drive each pulse motor under open-loop control. [0004] In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D05B19/16D05B69/00
CPCD05B19/10D05B19/14D05B55/14D05B63/02D05B69/30
Inventor 洼田次勇
Owner JUKI CORP
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