Thick fabric sewing control method and system and sewing machine

Abstract

The invention discloses a thick fabric sewing control method and system and a sewing machine, and the method comprises the steps: judging whether the current rotating speed of a motor is smaller than a preset rotating speed or not within a preset time period; if yes, entering an over-thickness mode, controlling the machine needle to move upwards to a target position, and adjusting the current speed and the current angle of the machine needle so as to enable the machine needle to pierce the target fabric from the target position at the target speed from the target angle; if not, the normal mode is kept, and the machine needle is controlled to pierce the target fabric from the current angle at the current speed. According to the invention, on the basis of the current rotating speed of the motor, motor control parameters are automatically adjusted after the motor is blocked, and the over-thickness capability is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sewing machines, and in particular to a thick fabric sewing control method and control system. The present invention also relates to a sewing machine. Background Art

[0002] When sewing fabrics, the electronic control system of the sewing machine will give the corresponding current according to the load, driving the motor to run at an ideal speed. When sewing thicker fabrics, it is very easy for the motor to be blocked due to the slow response of the electronic control system, affecting the smooth penetration of the needle into the thick fabric, making the sewing machine's ability to sew thick fabrics relatively poor.

[0003] Therefore, how to improve the thick fabric sewing control method to enhance the over-thickness capability is a technical problem that needs to be solved by those skilled in the art. Summary of the invention

[0004] In view of this, the object of the present invention is to provide a thick fabric sewing control method, a control system and a sewing machine, which solve the technical problem of poor over-thickness capability.

[0005] To achieve the above object, the present invention provides a thick fabric sewing control method, the steps comprising:

[0006] S1. Within a preset time period, determine whether the current speed of the motor is less than the preset speed; if so, enter the over-thickness mode, control the needle to move up to the target position and adjust the current speed and current angle of the needle so that the needle penetrates the target fabric from the target position at the target speed from the target angle; if not, maintain the normal mode and control the needle to penetrate the target fabric at the current speed from the current angle.

[0007] Preferably, the steps further include:

[0008] S2, judging whether the number of times entering the over-thickness mode is greater than the set number; if so, feeding back the motor stall error information; if not, repeating step S1.

[0009] Preferably, the steps further include:

[0010] S3. Within a specified time period, determine whether the current speed of the motor is less than the specified speed; if so, enter the overstem mode, control the needle to move up to the specified position and adjust the current response speed of the motor; if not, maintain the normal mode.

[0011] Preferably, after the needle penetrates the target fabric from the target position at the target speed and from the target angle, the step further includes:

[0012] S11, judging whether the needle has passed through the target fabric, if so, ending the over-thickness mode and entering the normal mode; if not, maintaining the over-thickness mode.

[0013] The present invention also provides a thick fabric sewing control system, which is applied to any of the thick fabric sewing control methods described above, comprising:

[0014] The jam judgment module is used to judge whether the current speed of the motor is less than the preset speed within a preset time period; if so, it enters the over-thickness mode, controls the needle to move up to the target position and adjusts the current speed and current angle of the needle so that the needle penetrates the target fabric from the target position at the target speed and from the target angle; if not, maintains the normal mode and controls the needle to penetrate the target fabric at the current speed and from the current angle.

[0015] Preferably, a rotation speed detection module is also included, which is used to detect the current rotation speed of the motor.

[0016] Preferably, it also includes an error feedback module for judging whether the number of times of entering the over-thickness mode is greater than the set number; if so, feeding back the motor jam error information; if not, starting the jam judgment module.

[0017] Preferably, it also includes an over-stem judgment module, which is used to judge whether the current speed of the motor is less than the specified speed within a specified time period; if so, it enters the over-stem mode, controls the needle to move up to the specified position and adjusts the current response speed of the motor; if not, it maintains the normal mode.

[0018] Preferably, it also includes an over-thickness switching module for determining whether the needle has passed through the target fabric. If so, the over-thickness mode is terminated and the normal mode is entered; if not, the over-thickness mode is maintained.

[0019] The present invention further provides a sewing machine comprising any one of the thick fabric sewing control systems described above.

[0020] Compared with the background technology, the thick fabric sewing control method provided by the present invention includes step S1, within a preset time period, judging whether the current speed of the motor is less than the preset speed. If so, it means that the motor is blocked, then entering the over-thickness mode, controlling the needle to move up to the target position, adjusting the current speed and current angle of the needle at the target position, so that the needle penetrates the target fabric from the target position at the target speed from the target angle; if not, maintaining the normal mode, controlling the needle to penetrate the target fabric from the current speed from the current angle. The present invention is based on the current speed of the motor, automatically adjusts the motor control parameters when the motor is blocked, and improves the over-thickness capability.

[0021] The thick fabric sewing control system and sewing machine provided by the present invention have the same beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0023] Figure 1 A main flow chart of a thick fabric sewing control method provided by a specific embodiment of the present invention;

[0024] Figure 2 The present invention is a complete flow chart of a thick fabric sewing control method provided by a specific embodiment of the present invention. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] The embodiment of the present invention discloses a thick fabric sewing control method, such as Figure 1 As shown, the steps include:

[0028] S1. Within a preset time period, determine whether the current speed of the motor is less than the preset speed; if so, enter the over-thickness mode, control the needle to move up to the target position and adjust the current speed and current angle of the needle so that the needle penetrates the target fabric from the target position at the target speed from the target angle; if not, maintain the normal mode and control the needle to penetrate the target fabric at the current speed from the current angle.

[0029] The two working modes of the needle in this article are over-thickness mode and normal mode. Over-thickness mode is used for thick fabrics, and normal mode is used for thin fabrics. This makes it suitable for sewing fabrics of different thicknesses and has good adaptability. The working parameters of the needle in over-thickness mode and normal mode are different. For example, the speed of the needle in over-thickness mode is greater than that in normal mode. The working parameters of the needle in over-thickness mode and normal mode can be preset and stored according to the type of fabric, which is convenient for flexible call according to the type of fabric.

[0030] The preset speed in the text refers to the highest speed when the motor is blocked, which can be 20rpm, but is not limited to this. The preset time period in the text refers to the longest continuous operation time when the motor is blocked, which can be 500ms, but is not limited to this. The control of the needle moving up is achieved by the motor reversely pulling and lifting the needle. The target position in the text can be the initial position where the needle pierces the thick fabric in the over-thick mode. The target fabric in the text is specifically thick fabric.

[0031] After the needle moves up to the target position, the current speed and current angle of the needle need to be adjusted. Specifically, the current speed of the needle is increased by controlling the current of the motor until the current speed increases to the target speed. The current angle is adjusted by adjusting the rotation angle of the motor until it becomes the target angle. Among them, the target angle can be achieved by deflecting 20 degrees from the current angle, but the target angle adjustment method is not limited to this.

[0032] In summary, the thick fabric sewing control method provided by the present invention is based on the current rotation speed of the motor, and automatically adjusts the motor control parameters when the motor is blocked to improve the ability to sew thick fabrics.

[0033] The above thick fabric sewing control method, such as Figure 2 As shown, the steps also include:

[0034] S2, judging whether the number of times entering the over-thickness mode is greater than the set number; if so, feedback the motor stall error information to avoid frequent stalling and failure of the motor in the over-thickness mode; if not, repeating step S1. The set number of times in the text can be two, but is not limited thereto.

[0035] The above thick fabric sewing control method, such as Figure 2 As shown, the steps also include:

[0036] S3. Within the specified time period, determine whether the current speed of the motor is less than the specified speed; if so, enter the stem-passing mode, control the needle to move up to the specified position and adjust the current response speed of the motor, and then indirectly adjust the parameters of the needle to ensure that the needle passes through the stem smoothly; if not, maintain normal mode. The specified speed in the text can be the maximum speed of the motor when passing the stem, and the value can be the same as the above-mentioned set speed, which can be adjusted according to the type of fabric. The specified time period in the text can be the longest continuous operation time of the motor when passing the stem, which can be the same as the above-mentioned set time period, of course, it can also be different.

[0037] The thick fabric sewing control method provided by the present invention can also be based on the current rotation speed of the motor, and automatically adjust the motor control parameters after the motor is overloaded, so as to achieve better adaptability.

[0038] The above-mentioned thick fabric sewing control method, after the machine needle penetrates the target fabric from the target position at the target speed and from the target angle, Figure 2As shown, the steps also include:

[0039] S11, judging whether the needle has passed through the target fabric, if so, ending the over-thickness mode and entering the normal mode; if not, maintaining the over-thickness mode; thus, the working mode of the needle can be automatically switched, with a higher degree of automation. In addition, the load of the motor or the detection element can be used to detect whether the needle has passed through the target fabric.

[0040] The embodiment of the present invention also discloses a thick fabric sewing control system, which is applied to the above-mentioned thick fabric sewing control method, and includes a jam judgment module, which is used to judge whether the current speed of the motor is less than the preset speed within a preset time period; if so, it enters the over-thickness mode, controls the needle to move up to the target position and adjusts the current speed and current angle of the needle so that the needle can penetrate the target fabric from the target position at the target speed from the target angle; if not, it maintains the normal mode and controls the needle to penetrate the target fabric from the current speed from the current angle. The thick fabric sewing control system provided by the present invention can still use the current speed of the motor as a basis, and automatically adjust the motor control parameters when the motor is jammed, thereby improving the over-thickness capability.

[0041] The thick fabric sewing control system further includes a speed detection module for detecting the current speed of the motor. The speed detection module may be an encoder, etc., which is not specifically limited here.

[0042] The thick fabric sewing control system further comprises an error feedback module for judging whether the number of times the over-thickness mode is entered is greater than a set number; if so, the motor stall error information is fed back; if not, the stall judgment module is started.

[0043] The above-mentioned thick fabric sewing control system also includes an over-stem judgment module, which is used to judge whether the current speed of the motor is less than the specified speed within a specified time period; if so, it enters the over-stem mode, controls the needle to move up to the specified position and adjusts the current response speed of the motor; if not, maintains the normal mode.

[0044] The above-mentioned thick fabric sewing control system also includes an over-thickness switching module, which is used to determine whether the needle has passed through the target fabric. If so, the over-thickness mode is terminated and the normal mode is entered; if not, the over-thickness mode is maintained.

[0045] The embodiment of the present invention further discloses a sewing machine, comprising the above-mentioned thick fabric sewing control system, which has the same beneficial effects.

[0046] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0047] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A thick fabric sewing control method, characterized in that the steps include: S1. Within a preset time period, determine whether the current speed of the motor is less than a preset speed; If so, the over-thickness mode is entered, the needle is controlled to move up to the target position and the current speed and current angle of the needle are adjusted so that the needle penetrates the target fabric from the target position at the target speed and from the target angle; if not, the normal mode is maintained, and the needle is controlled to penetrate the target fabric at the current speed and from the current angle.

2. The thick fabric sewing control method according to claim 1, characterized in that: The steps also include: S2, judging whether the number of times of entering the over-thickness mode is greater than the set number; if so, feeding back a motor stall error message; if not, repeating step S1.

3. The thick fabric sewing control method according to claim 2, characterized in that: The steps also include: S3. Within a specified time period, determine whether the current speed of the motor is less than the specified speed; if so, enter the over-stem mode, control the needle to move up to the specified position and adjust the current response speed of the motor; if not, maintain the normal mode.

4. The thick fabric sewing control method according to any one of claims 1 to 3, characterized in that: After the needle penetrates the target fabric from the target position at the target speed and from the target angle, the steps further include: S11, determining whether the needle has passed through the target fabric, if so, terminating the over-thickness mode and entering the normal mode; if not, maintaining the over-thickness mode.

5. A thick fabric sewing control system, applied to the thick fabric sewing control method according to any one of claims 1 to 4, characterized in that: include: A congestion judgment module is used to judge whether the current speed of the motor is less than a preset speed within a preset time period; If so, the over-thickness mode is entered, the needle is controlled to move up to the target position and the current speed and current angle of the needle are adjusted so that the needle penetrates the target fabric from the target position at the target speed and from the target angle; if not, the normal mode is maintained, and the needle is controlled to penetrate the target fabric at the current speed and from the current angle.

6. The thick fabric sewing control system according to claim 5, characterized in that: It also includes a rotation speed detection module, which is used to detect the current rotation speed of the motor.

7. The thick fabric sewing control system according to claim 5, characterized in that: It also includes an error feedback module, which is used to determine whether the number of times the over-thickness mode is entered is greater than a set number; if so, the motor jam error information is fed back; if not, the jam judgment module is started.

8. The thick fabric sewing control system according to claim 7, characterized in that: It also includes an over-stem judgment module, which is used to judge whether the current speed of the motor is less than the specified speed within a specified time period; if so, it enters the over-stem mode, controls the needle to move up to the specified position and adjusts the current response speed of the motor; If not, remain in normal mode.

9. The thick fabric sewing control system according to claim 5, characterized in that: It also includes an over-thickness switching module for determining whether the needle has passed through the target fabric. If so, the over-thickness mode is terminated and the normal mode is entered; if not, the over-thickness mode is maintained.

10. A sewing machine, characterized in that: The thick fabric sewing control system comprises the control system described in any one of claims 5 to 9.

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