阅读说明：本技术 一种压脚自适应方法 (Presser foot self-adaption method ) 是由 张丁元 魏大江 陈信宝 王亮 王立庆 周伟 于 2020-10-20 设计创作，主要内容包括：本发明型提供了一种压脚自适应方法,包括以下步骤：S1.驱动压脚下降,同时实时获取电机电流值；S2.依据当前的电机电流值判断压脚是否有效接触于布料；S3.在压脚有效接触于布料时进行绣作。本发明的优点在于：能够实现针对不同厚度的布料压脚高度自动变化,不需要人工调节,提高调整效率,同时能够避免因为人工调整问题而导致的品质问题。(The invention provides a presser foot self-adaptive method, which comprises the following steps: s1, driving a presser foot to descend, and simultaneously acquiring a current value of a motor in real time; s2, judging whether the presser foot is effectively contacted with the cloth according to the current value of the motor current; and S3, embroidering when the presser foot is effectively contacted with the cloth. The invention has the advantages that: can realize the high automatic change of cloth presser foot to different thickness, do not need manual regulation, improve adjustment efficiency, can avoid the quality problem because manual adjustment problem leads to simultaneously.)

1. A presser foot self-adaptation method is characterized by comprising the following steps:

s1, driving a presser foot to descend, and simultaneously acquiring a current value of a motor in real time;

s2, judging whether the presser foot is effectively contacted with the cloth according to the current value of the motor current;

and S3, embroidering when the presser foot is effectively contacted with the cloth.

2. The presser foot adaptive method according to claim 1, wherein in step S2, it is determined that the presser foot is in effective contact with the cloth when the motor current value is within a preset current interval.

3. Presser foot adaptation method according to claim 2, characterized in that the method comprises an adaptation method in an intelligent mode for embroidering cloth of the same or different thickness.

4. The presser foot adaptive method according to claim 3, wherein in the smart mode, steps S1-S3 are respectively:

s11, driving the presser foot to descend, and simultaneously acquiring the current value of the motor in real time;

s21, judging whether the current value of the motor is in a preset current interval or not, if so, performing the embroidery, and otherwise, adjusting the rotation angle of the motor to maintain the current value of the motor in the preset current interval;

s31, repeating the steps S11 and S21 in the subsequent embroidering process.

5. A presser foot adaptive method according to any one of claims 2-4, characterized in that the method comprises an adaptive method in a single mode, and the single mode is used for embroidering cloth with the same thickness.

6. The presser foot self-adaptation method according to claim 5, wherein in the single mode, when embroidering is started for a new cloth, steps S1 and S2 are executed first, and in the execution process of step S2, two motor rotation angles at which the motor current value is the end point of the preset current interval are simultaneously obtained as embroidering angles;

then, step S3 is executed according to the result of step S2, and step S3 specifically includes:

s32, when the motor rotates between two embroidering angles, the presser foot is considered to be effectively contacted with the cloth, and embroidering is carried out by taking the embroidering angles as references in the subsequent embroidering process.

7. The presser foot adaptive method according to claim 6, wherein in step S1, the presser foot is driven down by a closed loop motor.

8. The presser foot adaptive method according to claim 7, wherein in step S1, a motor current value is obtained by a current detection circuit in the closed-loop motor, and the closed-loop motor transmits the obtained motor current value to the driver in real time.

9. The presser foot adaptive method according to claim 8, wherein the motor comprises an encoder, the encoder obtains a motor rotation angle and transmits the motor rotation angle to the driver in real time, and the driver determines two embroidery angles according to a motor current value.

10. The presser foot adaptation method according to claim 9, wherein the preset current interval has a lower limit of 0.1A to 2A and an upper limit of 0.5A to 2A.

Technical Field

The invention belongs to the field of working methods of embroidery machines, and particularly relates to a presser foot self-adaption method.

Background

The computerized embroidery machine is divided into a flat embroidery machine, a flying shuttle embroidery machine and a towel embroidery machine according to the embroidery process, wherein the flat embroidery machine and the towel embroidery machine are mixed to embroider, and are widely used for finished products and semi-finished products of fashionable dress, sweater and various fabrics. Through the development and innovation of the traditional towel embroidery machine technology, the production efficiency is greatly improved, and the ever-changing embroidery design is shown.

The embroidery cloth of the embroidery machine is not limited to one thickness, the thickness of the new cloth needs to be measured each time before the new cloth is embroidered, and the presser foot height is adjusted according to the thickness of the new cloth to adapt to the cloth with different thicknesses.

Disclosure of Invention

The invention aims to solve the problems and provides a presser foot self-adaption method.

In order to achieve the purpose, the invention adopts the following technical scheme:

a presser foot self-adaptation method comprising the steps of:

s1, driving a presser foot to descend, and simultaneously acquiring a current value of a motor in real time;

s2, judging whether the presser foot is effectively contacted with the cloth according to the current value of the motor current;

and S3, embroidering when the presser foot is effectively contacted with the cloth.

In the presser foot adaptive method, in step S2, when the motor current value is within the preset current interval, it is determined that the presser foot is in effective contact with the fabric.

In the presser foot self-adaptive method, the method comprises a self-adaptive method in an intelligent mode, and the intelligent mode is used for embroidering the cloth with the same or different thickness.

In the presser foot self-adaptation method, in the intelligent mode, the steps S1-S3 are respectively:

s11, driving the presser foot to descend, and simultaneously acquiring the current value of the motor in real time;

s21, judging whether the current value of the motor is in a preset current interval or not, if so, performing the embroidery, and otherwise, adjusting the rotation angle of the motor to maintain the current value of the motor in the preset current interval;

s31, repeating the steps S11 and S21 in the subsequent embroidering process.

In the presser foot self-adaptive method, the method comprises a self-adaptive method in a single mode, and the single mode is used for embroidering the cloth with the same thickness.

In the presser foot self-adaptive method, in a single mode, when embroidering is started on a new cloth, steps S1 and S2 are executed first, and in the execution process of step S2, two motor rotation angles at which the motor current value is the end point of a preset current interval are simultaneously obtained as embroidering angles;

then, step S3 is executed according to the result of step S2, and step S3 specifically includes:

s32, when the motor rotates between two embroidering angles, the presser foot is considered to be effectively contacted with the cloth, and embroidering is carried out by taking the embroidering angles as references in the subsequent embroidering process.

In the presser foot adaptive method described above, in step S1, the presser foot is driven to descend by a closed-loop motor.

In the presser foot adaptive method, in step S1, a current detection circuit in the closed-loop motor acquires a motor current value, and the closed-loop motor transmits the acquired motor current value to the driver in real time.

In the presser foot self-adaptive method, the motor comprises an encoder, the encoder acquires a motor rotation angle and transmits the motor rotation angle to the driver in real time, and the driver determines two embroidery angles according to a motor current value.

In the presser foot self-adaptive method, the lower limit of the preset current interval is 0.1 to 2A, and the upper limit is 0.5 to 2A.

The invention has the advantages that: the cloth presser foot height automatic change to different thickness is realized, does not need manual regulation, improves adjustment efficiency, can avoid the quality problem that leads to because manual adjustment problem simultaneously.

Drawings

FIG. 1 is a method flowchart of a presser foot adaptive method in accordance with an embodiment of the present invention;

fig. 2 is a method flowchart of a presser foot self-adaptation method in the second embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Example one

As shown in fig. 1, the present embodiment discloses a presser foot self-adapting method, which includes the following steps:

s1, the presser foot is driven by a closed-loop motor, the current value of the motor is obtained in real time, the closed-loop motor rotates, the presser foot descends, when the presser foot is in contact with the cloth and meets resistance, the current of the closed-loop motor can be increased, and therefore whether the presser foot is in effective contact with the cloth or not can be detected through a mode of detecting the current value of the closed-loop motor.

And S2, judging whether the presser foot is effectively contacted with the cloth according to the current value of the motor current. When the current value of the motor is too large, the presser foot is in contact with the cloth too tightly, and when the current value of the motor is too small, the presser foot is not in complete contact with the cloth, so that the presser foot is judged to be in effective contact with the cloth when the current value of the motor is within a preset current interval. The lower limit of the preset current interval is 0.1A-2A, and the upper limit is 0.5A-2A. In the actual production process, the interval ranges can be 0.1-0.5,0.5-2, 1.1-1.8 and the like according to specific conditions. Ideally, the interval may be a single value.

In particular, the method includes an adaptive method in a single mode, and the single mode is used for embroidering cloth having the same thickness.

Specifically, in the single mode, when starting to embroider a new fabric, steps S1 and S2 are first executed, and in the execution process of step S2, two rotation angles of the motor are simultaneously obtained when the current value of the motor is an end point of the preset current interval, and the two rotation angles are respectively referred to as an embroidery angle. For example, if the preset current interval is 0.5 to 1A, the motor rotation angle when the motor current value is 0.5A and the motor rotation angle when the motor current value is 1A are respectively obtained, and the two motor rotation angles are two embroidery angles.

In this case, step S3 specifically includes:

s31, when the motor rotates between two embroidering angles, the presser foot is considered to be effectively contacted with the cloth, and embroidering is carried out by taking the embroidering angles as references in the subsequent embroidering process.

In the prior art, basically, motors, such as closed-loop motors, servo motors and the like, are provided with built-in current detection circuits, and the current value of the motor is directly obtained by using the current detection circuits in the closed-loop motors. In addition, the tail part of the closed-loop motor in the prior art is provided with an encoder, the encoder can acquire the angle of the motor shaft and accurately control the position of the motor shaft, so that the rotation angle of the motor is acquired through the encoder.

The closed-loop motor transmits the acquired motor current value to the driver in real time, the encoder transmits the acquired motor rotation angle to the driver in real time, when the presser foot starts to contact the cloth, the motor current value corresponds to the motor rotation angle, and two end points of the preset current interval correspond to the two embroidery angles one by one, so that the driver can determine the two embroidery angles according to the motor current value.

Meanwhile, the driver judges whether the presser foot is effectively contacted with the cloth according to the motor rotation angle received in real time.

The principle that different presser foot heights are required according to different cloth thicknesses and correspond to different motor angles is adopted, and the cloth with different thicknesses is adapted by controlling the rotation angle of the motor. When a new cloth is embroidered, the embroidering angle is obtained simultaneously in the process of descending the presser foot for the first time, and in the subsequent embroidering, the rotation angle of the closed-loop motor is directly controlled by the driver to be between the embroidering angles when the presser foot is descended for embroidering each time, so that a worker does not need to manually adjust the presser foot according to the thickness of the cloth. The overall embroidering efficiency can be improved, and meanwhile, the quality problem caused by manual adjustment can be avoided.

Example two

As shown in fig. 2, the present embodiment is similar to the present embodiment, except that the present embodiment belongs to an intelligent mode, and can be used for embroidering cloth with different thicknesses, and automatically adjust according to the thickness of the cloth in real time during the embroidering process. The method specifically comprises the following steps:

in the smart mode, steps S1-S3 are:

s12, driving the presser foot to descend, and simultaneously acquiring the current value of the motor in real time;

s22, judging whether the current value of the motor is in a preset current interval or not, if so, performing the embroidery, and otherwise, adjusting the rotation angle of the motor to maintain the current value of the motor in the preset current interval;

s32, repeating the steps S12 and S22 in the subsequent embroidering process.

Compared with the first embodiment, the first embodiment has higher intelligence degree and stronger adaptability to cloth.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Although the terms of presser foot, motor current value, preset current, embroidery angle, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.