A printing method and printing device

Abstract

This invention relates to the field of printing technology, and more particularly to a printing method and printing device. The thickness of the fabric to be printed on the guide belt is detected to identify abnormal portions in the fabric. If an abnormal portion exists in the fabric, the printing unit is controlled to lift up based on the thickness and length of the abnormal portion as it passes through. The abnormal portion includes a first abnormal portion, which is a portion of the fabric exceeding a first preset thickness and a first preset length. By automatically detecting abnormal portions in the fabric and automatically lifting the printing unit to allow the abnormal portion to pass, damage to the print head caused by abnormal portions in the fabric can be reduced, protecting the print head. Furthermore, it eliminates the need for machine downtime, improving production efficiency and reducing waste.

Description

Technical Field

[0001] This invention relates to the field of printing technology, and more particularly to a printing method and printing device. Background Technology

[0002] With the rapid development of the printing and dyeing industry, printing machines have also developed rapidly and are constantly being updated and replaced. From traditional mechanical rotary screen printing machines to computer-controlled digital printing machines, printing machines are gradually becoming more efficient, precise and intelligent through continuous innovation and development.

[0003] Currently, when various types of printed fabrics pass through a digital printing machine, if the fabric is uneven, it can easily scratch the print head, causing irreversible damage to the print head. At present, when the fabric is uneven, the print head is usually protected from scratching by manually smoothing the fabric or manually lifting the print head. However, frequent downtime will reduce production efficiency and cause waste. Summary of the Invention

[0004] The main technical problem solved by the embodiments of the present invention is to provide a printing method that can reduce the damage to the printhead caused by abnormal parts in the fabric, protect the printhead, and is automatically controlled without the need for machine shutdown or manual handling, thereby improving production efficiency and reducing waste.

[0005] To address the aforementioned technical problems, in a first aspect, embodiments of the present invention provide a printing method for a printing device, comprising:

[0006] The thickness of the fabric to be printed on the guide belt is detected to identify abnormal portions in the fabric to be printed;

[0007] If there is an abnormal part in the fabric to be printed, the printing unit is controlled to lift up when the abnormal part passes the printing unit, according to the thickness and length of the abnormal part. The abnormal part includes a first abnormal part, which is a part of the fabric to be printed that has a thickness exceeding a first preset thickness and a length exceeding a first preset length.

[0008] In some embodiments, detecting the thickness of the fabric to be printed on the guide belt to determine abnormal portions in the fabric to be printed includes:

[0009] The thickness of the fabric to be printed is detected by the first sensor. If there is a portion in the fabric to be printed that has a thickness exceeding a first preset thickness and a length exceeding a first preset length, then it is determined that the first abnormal portion exists in the fabric to be printed.

[0010] In some embodiments, detecting the thickness of the fabric to be printed on the guide belt to determine abnormal portions in the fabric to be printed further includes:

[0011] If there is a portion in the fabric to be printed that has a thickness exceeding the first preset thickness and a length less than the first preset length, then the fabric to be printed is made to pass through the second sensor;

[0012] If the fabric to be printed pushes up the baffle of the second sensor when it passes through the second sensor, it is determined that there is a second abnormal part in the fabric to be printed, wherein the baffle is set higher than the guide belt.

[0013] In some embodiments, detecting the thickness of the fabric to be printed on the guide belt to determine abnormal portions in the fabric to be printed further includes:

[0014] If there is no part in the fabric to be printed that has a thickness exceeding the first preset thickness, then it is determined that there is no abnormal part in the fabric to be printed.

[0015] In some embodiments, after detecting the thickness of the fabric to be printed on the guide belt to determine abnormal portions in the fabric to be printed, the method further includes:

[0016] If the abnormal portion exists in the fabric to be printed, the transmission speed of the guide belt is reduced.

[0017] In some embodiments, controlling the printing unit to lift based on the thickness and length of the abnormal portion includes:

[0018] The starting position of the abnormal part is obtained. When the starting position of the abnormal part reaches the first position point before the position of the printing unit, the printing unit is controlled to lift up to a first height and the printing unit is continuously lifted up for a first time.

[0019] The first time is the time corresponding to the starting position moving from the first position point to the second position point, and the second position point is the position point corresponding to the length of the abnormal part after the third position point after the printing unit position.

[0020] In some embodiments, the first sensor is a photoelectric height sensor, and the second sensor includes a bracket and a baffle mounted on the bracket.

[0021] To address the aforementioned technical problems, in a second aspect, embodiments of the present invention provide a printing device, comprising:

[0022] At least one processor, and

[0023] A memory, communicatively connected to the at least one processor, stores instructions executable by the at least one processor to enable the at least one processor to perform the method described in the first aspect above.

[0024] In some embodiments, the printing device further includes a first sensor, which is a photoelectric height sensor.

[0025] In some embodiments, the printing device further includes a second sensor, the second sensor including a bracket and a baffle mounted on the bracket.

[0026] The beneficial effects of this invention's embodiments: Unlike existing technologies, the printing method provided by this invention detects the thickness of the fabric to be printed on the guide belt to identify abnormal portions in the fabric. If an abnormal portion exists in the fabric, the printing unit is controlled to lift up based on the thickness and length of the abnormal portion as it passes through the printing unit. The abnormal portion includes a first abnormal portion, which is a portion of the fabric to be printed whose thickness exceeds a first preset thickness and whose length exceeds a first preset length. By automatically detecting abnormal portions in the fabric and automatically lifting the printing unit to allow the abnormal portion to pass, damage to the printhead caused by abnormal portions in the fabric can be reduced, protecting the printhead. Furthermore, it eliminates the need for machine downtime, improving production efficiency and reducing waste. Attached Figure Description

[0027] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0028] Figure 1 This is a structural block diagram of a printing device provided in an embodiment of the present invention;

[0029] Figure 2 A structural block diagram of a printing device provided in another embodiment of the present invention;

[0030] Figure 3 This is a schematic flowchart of a printing method provided in an embodiment of the present invention;

[0031] Figure 4 A schematic flowchart of a printing method provided in another embodiment of the present invention;

[0032] Figure 5 A schematic flowchart of a printing method provided in another embodiment of the present invention;

[0033] Figure 6 A schematic flowchart of a printing method provided in another embodiment of the present invention;

[0034] Figure 7 This is a schematic flowchart of a printing method provided in another embodiment of the present invention. Detailed Implementation

[0035] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention. These all fall within the scope of protection of the present invention.

[0036] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0037] It should be noted that, unless otherwise specified, the various features in the embodiments of this invention can be combined with each other, all within the scope of protection of this application. Furthermore, although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than the module division in the device or the order in the flowchart. In addition, the terms "first," "second," and "third" used herein do not limit the data or execution order, but only distinguish identical or similar items with substantially the same function and effect.

[0038] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0039] Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0040] Before describing the printing method provided in the embodiments of the present invention in detail, the hardware structure of the printing device provided in an embodiment of the present invention will be described.

[0041] Figure 1 This is a schematic diagram of the structure of a printing device provided in an embodiment of the present invention. Please refer to [link / reference]. Figure 1 The printing device includes at least one processor 11 and a memory 12 connected in communication. Figure 1 (Taking a bus connection and a single processor as an example). Those skilled in the art will understand that... Figure 1 The structure shown is for illustrative purposes only and does not limit the structure of the aforementioned electronic device. For example, the printing device may also include... Figure 1The more or fewer components shown, or having the same Figure 1 The different configurations shown.

[0042] The processor 11 is used to provide computing and control capabilities to control the printing device 10 to perform corresponding tasks, such as controlling the printing device 10 to perform any of the printing methods provided in the following embodiments of the invention.

[0043] It is understood that the processor 11 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0044] The memory 12, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs, non-transitory computer-executable programs, and modules, such as the program instructions / modules corresponding to the printing method in the embodiments of the present invention. The processor 11, by running the non-transitory software programs, instructions, and modules stored in the memory 12, can implement the printing method in any of the following method embodiments. The memory 12 may include high-speed random access memory and non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory 12 may also include memories remotely located relative to the processor, which can be connected to the processor via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0045] It is understood that the printing device 10 also includes a printing unit 13. The printing device 10 may include one printing unit or multiple printing units. The printing unit 13 is used to print on the object to be printed. The printing unit 13 includes a print head. When the object to be printed is conveyed to the printing unit 13 by the guide belt, the print head sprays ink to print on the object. The printing unit can print on any material and irregular soft or hard objects. In this embodiment of the invention, the printing unit 13 is mainly used to print on textiles.

[0046] In some embodiments, such as Figure 2As shown, the printing device 10 also includes a first sensor 14, which is a photoelectric height sensor.

[0047] A photoelectric sensor is a device that converts light signals into electrical signals. Its working principle is based on the photoelectric effect. The photoelectric effect refers to the phenomenon where, when light shines on certain materials, the electrons in the material absorb the energy of photons, resulting in a corresponding electrical effect. Photoelectric sensors typically include slotted photoelectric sensors, through-beam photoelectric sensors, reflector-type photoelectric switches, and diffuse reflection-type photoelectric switches, etc. Photoelectric height sensors determine the height of the object being detected by measuring the amount of light flux. Installing a photoelectric height sensor in a printing device can obtain the thickness of the fabric to be printed and the thickness of any abnormal portions of the fabric, facilitating the adjustment of the printing unit's lifting height and protecting the print head.

[0048] In some embodiments, the first sensor 14 is a through-beam photoelectric height sensor. The through-beam photoelectric height sensor consists of a emitter and a receiver, which are separate. Its detection distance can reach several meters or even tens of meters. In use, the emitter and receiver are respectively mounted on opposite sides of the path of the object being detected. When the object passes through, it blocks the light path, and the receiver collects relevant information about the light flux and outputs a signal to indicate the height of the object. The through-beam photoelectric height sensor has a long measurement distance, short response time, and is a non-contact detection method, therefore it will not damage the object being detected or the sensor, and can be used for a long time. Therefore, setting a through-beam photoelectric height sensor in a printing device can accurately and quickly detect the thickness of the fabric to be printed without damaging the fabric. The thickness of abnormal parts in the fabric can be obtained based on its output signal, facilitating subsequent adjustments to the printing unit of the printing device.

[0049] In some embodiments, such as Figure 2 As shown, the printing device 10 also includes a second sensor 15, which includes a bracket and a baffle mounted on the bracket.

[0050] The second sensor 15 is a mechanical height limiting device based on the principle of mechanical gravity. It includes a bracket and a baffle mounted on the bracket. Its function is to output a corresponding signal based on whether the baffle is lifted when the object to be detected passes through it. It is installed on the guide belt of the printing equipment. For example, the height of the second sensor 15 can be set to be the same as or lower than the height of the print head of the printing unit to detect whether the fabric to be printed can pass through the print head. If the fabric to be printed does not lift the baffle when it passes through the second sensor 15, it can pass through the print head. If the fabric to be printed lifts the baffle when it passes through the second sensor 15, there is an abnormal part of the fabric to be printed and it cannot pass through the print head normally. When the baffle is lifted, the second sensor 15 outputs a corresponding signal.

[0051] The printing method provided in the embodiments of the present invention will be described in detail below. Please refer to [link / reference]. Figure 3 The method includes, but is not limited to, the following steps:

[0052] S301: Detect the thickness of the fabric to be printed on the guide belt to identify abnormal parts in the fabric to be printed.

[0053] The printing equipment includes a guide belt on which the fabric is transported to the printing unit for printing. Before printing, the fabric transported on the guide belt is subjected to thickness detection to determine whether there are any abnormal parts in the fabric to be printed.

[0054] Abnormal parts refer to fabric sections that cannot pass through the printing unit and could damage the print head. For example, some fabrics may contain excessively thick seams or thick, loosely attached fabric fibers. Seams are the interfaces created by manually sewing fabric pieces together along the printing width; their length typically exceeds 200mm. If the seam is too thick, it will scrape the print head as it passes through the printing unit, causing significant damage. Fabric fibers are wispy, raised strands in the printing feed direction caused by cutting. Although these fibers are not as continuous as those in the print head, if multiple thick strands are stuck together, they will be thick and stiff, and long-term scraping of the print head will also damage it.

[0055] The abnormal part includes a first abnormal part, which is a part of the fabric to be printed that has a thickness exceeding a first preset thickness and a length exceeding a first preset length. For example, the first abnormal part is a joint.

[0056] The first preset thickness is the thickness of the fabric that will not scratch the printing unit or damage the print head. In practice, the first preset thickness can be set to the maximum height at which the fabric will pass through the printing unit without damaging the print head. For example, the first preset thickness can be set to a height 0.5mm lower than the height of the print head during printing. It should be understood that fabrics vary widely; for example, fabrics can be cotton, silk, nylon, etc., and they can have single-layer, double-layer, or multi-layer structures. The characteristics and thicknesses of various fabrics differ, and to ensure printing quality, the printing height will be adjusted according to the fabric, therefore the first preset thickness will also be adjusted accordingly. Unlike metal, fabric has a certain degree of flexibility. If the length of an extra-thick section of the fabric is relatively short, it may pass through the printing unit without damaging the print head. However, there are continuous long sections in the fabric, such as seams. Due to their long continuous length and excessive thickness, these sections can cause significant damage to the print head. Therefore, a first preset length is used to distinguish between them. For example, the first preset length can be set to differentiate between fabric seams and fabric fibers. For instance, the first preset length can be set to the minimum length of a typical seam, such as 200mm.

[0057] S302: If there is an abnormal part in the fabric to be printed, the printing unit is controlled to lift up according to the thickness and length of the abnormal part when the abnormal part passes through the printing unit.

[0058] To protect the print head, if there are abnormal parts in the fabric to be printed, the printing unit is raised as the abnormal parts pass by, allowing the abnormal parts to pass through without being printed, thus reducing scratching of the print head.

[0059] The height and time at which the printing unit is raised are determined based on the thickness and length of the abnormal part to ensure that the abnormal part passes through the printing unit completely.

[0060] Once the abnormal portion has completely passed through the printing unit, the printing unit is controlled to drop, and printing on the fabric continues.

[0061] It should be understood that processing abnormal parts does not require stopping the machine, and the printing of normal parts of the fabric is unaffected only by the absence of printed blanks in the abnormal parts. Because the abnormal parts leave blanks, they can be easily and quickly located manually after the printing job is completed for subsequent processing, improving production efficiency, avoiding waste, and saving resources.

[0062] In some embodiments, the starting position of the abnormal part is obtained. When the starting position of the abnormal part reaches the first position point before the printing unit position, the printing unit is controlled to lift up to a first height and the printing unit is continuously lifted up for a first time. The first time is the time corresponding to the starting position moving from the first position point to the second position point, and the second position point is the position point corresponding to the length of the abnormal part after the third position point after the printing unit position.

[0063] Specifically, when the starting position of the abnormal part reaches the first position point, the printing unit is controlled to lift up and remain raised for a certain period of time. Alternatively, when the starting position of the abnormal part reaches the first position point, the printing unit is controlled to lift up until the starting position of the abnormal part reaches the second position point. The first position point is a point before the printing unit's position, the third position point is a point after the printing unit's position, and the second position point is the position corresponding to the length of the abnormal part moving backward from the third position point—that is, the position where the abnormal part's starting position is located after it has completely passed through the printing unit. The first period of time is the time it takes for the starting position to move from the first position point to the second position point, i.e., the time it takes for the abnormal part to completely pass through the printing unit. Since both lifting and lowering the printing unit require a certain amount of time, to prevent the abnormal part from passing through the printing unit and scratching the printhead during lifting or lowering, the first position point is set to a point before the printing unit's position. The setting of the first position point should ensure that the printing unit has sufficient time to lift before the abnormal part passes through. The third position point is set to a point after the printing unit's position, and the setting of the third position point should ensure that the printing unit will not fall before the abnormal part has completely passed through.

[0064] Once the printing unit is raised for the first time or the starting position of the abnormal part reaches the second position point, the printing unit is controlled to fall and printing on the fabric continues.

[0065] During implementation, since there is no need to stop the machine when dealing with abnormal parts, and only the abnormal parts are left blank without printing, it does not affect the printing of the normal parts of the fabric. Furthermore, based on the blank space of the abnormal parts, the abnormal parts can be easily and quickly located manually after the printing task is completed for subsequent processing, which improves production efficiency, avoids waste, and saves resources.

[0066] In this embodiment, by limiting the lifting height and lifting duration of the printing unit, it can be ensured that abnormal parts in the fabric to be printed pass through the printing unit completely, preventing damage to the printing nozzle caused by insufficient lifting height or lifting duration.

[0067] In summary, in this embodiment, by detecting the thickness of the fabric to be printed on the guide belt, abnormal portions in the fabric are identified. If an abnormal portion exists, the printing unit is controlled to lift up based on its thickness and length as it passes the printing unit. The abnormal portion includes a first abnormal portion, which is a portion of the fabric exceeding both a first preset thickness and a first preset length. By automatically detecting abnormal portions in the fabric and automatically lifting the printing unit to allow them to pass, damage to the printhead caused by abnormal portions can be reduced, protecting the printhead. Furthermore, no downtime or manual intervention is required, improving production efficiency and reducing waste.

[0068] In some embodiments, please refer to Figure 4 Step S301 specifically includes:

[0069] S303: The thickness of the fabric to be printed is detected by the first sensor.

[0070] S304: If there is a portion in the fabric to be printed that has a thickness exceeding the first preset thickness and a length exceeding the first preset length.

[0071] S305: A first abnormal part has been identified in the fabric to be printed.

[0072] The first sensor is a device in the printing equipment used to detect the thickness of the fabric to be printed. The first abnormal part is a portion of the fabric to be printed that exceeds a first preset thickness and a first preset length. If the first abnormal part exists in the fabric, it will scrape the printhead as it passes through the printing unit, causing damage to the printhead. For example, the first abnormal part can be an overly thick joint. A joint is a part that is manually sewn between fabric pieces in the printing width direction. It is continuous and generally exceeds 200mm in length. Therefore, if the joint is overly thick, it will continuously scrape the printhead for a relatively long time as it passes through the printing unit, causing significant damage to the printhead. The printing method provided in this embodiment can determine whether there is an overly thick joint in the fabric to be printed.

[0073] In this embodiment, by obtaining the thickness of the fabric to be printed through the first sensor, it can be determined whether there is a first abnormal part in the fabric to be printed, which facilitates the subsequent control of the printing unit to process it and prevents damage to the print head due to the presence of the first abnormal part in the fabric to be printed.

[0074] In some embodiments, please refer to Figure 5 Step S301 specifically further includes:

[0075] S306: If there is a portion in the fabric to be printed that has a thickness exceeding the first preset thickness and a length less than the first preset length.

[0076] S307: Pass the fabric to be printed through the second sensor.

[0077] S308: If the fabric to be printed pushes up the baffle of the second sensor when it passes through the second sensor.

[0078] S309: A second abnormal part has been identified in the fabric to be printed.

[0079] During implementation, portions of the fabric to be printed that are thicker than the first preset thickness and longer than the first preset length cannot pass through the printing unit and will cause significant damage to the print head. However, since fabrics are not like metals, they have a certain degree of softness. If the length of the extra-thick portion of the fabric is small, such as a single tuft of fabric fibers, it can also pass through the printing unit without damaging the print head. But if it is multiple tufts of fabric fibers stuck together, it is harder than a single tuft of fabric fibers and may damage the print head, preventing it from passing through the printing unit. Therefore, it is necessary to distinguish and judge the portions of the fabric that are thicker than the first preset thickness but shorter than the first preset length.

[0080] Since the printing equipment needs to print on a variety of fabrics with different thicknesses and softnesses, it is difficult to distinguish and judge these parts by a fixed threshold. If the threshold is too low, it may cause missed detections, but if the threshold is too high, it may cause false alarms. Therefore, in this embodiment, a second sensor is used to simulate the nozzle of the printing unit, and the presence of a second abnormal part in the fabric to be printed is determined by whether the baffle of the second sensor is lifted.

[0081] The second sensor is used to determine whether a portion of the fabric to be printed, excluding the first abnormal portion, can pass through the printing unit without damaging the print head. The second sensor includes a baffle. If the fabric pushes up the baffle, it is determined that a second abnormal portion exists in the fabric, and this portion will damage the print head if it passes through the printing unit. If the fabric does not push up the baffle, then even if there is an excessively thick portion in the fabric besides the first abnormal portion, this excessively thick portion can pass through the printing unit smoothly without damaging the print head. Since the first abnormal portion has already been identified in the first sensor, it is not further identified in the second sensor. When the fabric passes through the second sensor, if the fabric pushes up the baffle and is not the first abnormal portion, a light signal is generated and sent to the printing device so that the printing unit can be raised when this portion subsequently passes through.

[0082] In this design, the baffle is positioned higher than the guide belt. During implementation, the baffle of the second sensor can be set to be the same height as or lower than the height of the print unit nozzle. For example, the height of the second sensor can be set to be 0.5mm lower than the print height, i.e., the nozzle height. It should be understood that due to the variety of fabrics, such as cotton, silk, linen, polyester, nylon, etc., and the different structures of single-layer, double-layer, and multi-layer fabrics, the characteristics and thickness of each fabric are different. To ensure the printing effect, the printing height will be adjusted according to the fabric, and the height of the second sensor baffle will also be adjusted accordingly.

[0083] In some embodiments, please refer to Figure 6 Step S301 specifically further includes:

[0084] S310: If there is no part in the fabric to be printed that has a thickness exceeding the first preset thickness.

[0085] S311: Determine that there are no abnormal parts in the fabric to be printed.

[0086] If there is no part in the fabric to be printed that exceeds the first preset thickness, that is, there is no excessively thick part in the fabric to be printed, then it is determined that there is no abnormal part in the fabric to be printed, and the fabric can pass through the printing unit smoothly without damaging the print head.

[0087] In some embodiments, if there are abnormal portions in the fabric to be printed, the conveyor belt speed is reduced.

[0088] Because the conveyor belt operates at high speed, if there are abnormal parts in the fabric to be printed, these abnormal parts will be transported by the belt at high speed. As they pass through the printing unit, the unit may not have enough time to process them, resulting in severe scratching of the print head and even the fabric being caught in the printing unit. This will cause significant damage to both the fabric and the printing unit, severely impacting production efficiency and greatly increasing waste. Therefore, when an abnormal part is detected in the fabric to be printed, the conveyor belt speed should be reduced to allow the printing unit sufficient time to process it, reducing scratching of the print head and preventing fabric from being caught in the printing unit.

[0089] In some embodiments, the starting position and length of the abnormal portion are obtained by the encoder signal of the main drive motor of the guide belt.

[0090] Specifically, the real-time position of the guide belt can be obtained based on the encoder signal of the main drive motor of the guide belt. The distance corresponding to the rising and falling positions of the first sensor signal is converted into the distance, which is the length of the abnormal part.

[0091] The main drive motor is used to transmit the guide belt and generate encoder signals, so that the printing equipment can analyze and record the movement position of the guide belt according to the encoder signals. Then, by recording the movement position of the guide belt, it is determined whether the starting position of the abnormal part has reached the first position point and whether the starting position of the abnormal part has reached the second position point.

[0092] In summary, the printing method provided by this invention detects the thickness of the fabric to be printed on the guide belt to identify abnormal portions in the fabric. If abnormal portions exist, the printing unit is controlled to lift up based on the thickness and length of the abnormal portions as they pass through. The abnormal portions include a first abnormal portion, which is a portion of the fabric to be printed that exceeds a first preset thickness and a first preset length. By automatically detecting abnormal portions in the fabric and automatically lifting the printing unit to allow them to pass, damage to the printhead caused by abnormal portions can be reduced, protecting the printhead. Furthermore, it eliminates the need for machine downtime, improving production efficiency and reducing waste.

[0093] The following uses a specific embodiment as an example to illustrate the specific process of the printing method provided by the present invention. Please refer to [link / reference]. Figure 7 The method includes, but is not limited to, the following steps:

[0094] S401: Detect the thickness of the fabric to be printed on the guide belt, and proceed to step S402.

[0095] S402: Determine whether there is a part in the fabric to be printed that has a thickness exceeding the first preset thickness. If not, proceed to step S403; if so, proceed to step S405.

[0096] S403: Determine that there are no abnormal parts in the fabric to be printed, and proceed to step S404.

[0097] S404: The fabric to be printed is being printed normally through the printing unit.

[0098] S405: Determine whether there is a portion in the fabric to be printed that has a thickness exceeding the first preset thickness and a length exceeding the first preset length. If not, proceed to step S406; if so, proceed to step S407.

[0099] S406: If there is a portion in the fabric to be printed that has a thickness exceeding the first preset thickness and a length less than the first preset length, determine whether the fabric to be printed will push up the baffle of the second sensor when it passes through the second sensor. If it will not push up the baffle, proceed to step S403. If it will push up the baffle, proceed to step S407.

[0100] S407: If an abnormal part is found in the fabric to be printed, proceed to step S408.

[0101] S408: When an abnormal part passes through the printing unit, the printing unit is controlled to lift up according to the thickness and length of the abnormal part.

[0102] The printing device detects the thickness of the fabric to be printed on the guide belt to determine whether there is a portion in the fabric that exceeds a first preset thickness. If no portion exists, it is determined that there is no abnormal portion in the fabric, and the fabric passes through the printing unit normally for printing. If a portion exists, it is determined whether there is a portion in the fabric that exceeds both the first preset thickness and the first preset length. If so, it is determined that there is an abnormal portion in the fabric, and when the abnormal portion passes through the printing unit, the printing unit is controlled to lift up based on the thickness and length of the abnormal portion. If no portion exists, it is determined whether the fabric will push up the baffle of the second sensor when it passes through the second sensor. If the baffle does not push up the second sensor, it is determined that there is no abnormal portion in the fabric, and the fabric passes through the printing unit normally for printing. If the baffle does push up the second sensor, it is determined that there is an abnormal portion in the fabric, and the printing unit is controlled to lift up based on the thickness and length of the abnormal portion when it passes through the printing unit.

[0103] In this embodiment, the thickness of the fabric to be printed is detected, and the presence of abnormal parts in the fabric is determined based on the thickness and length of the fabric. If there is a part whose thickness exceeds a first preset thickness and whose length exceeds a first preset length, it is considered that there is an abnormal part in the fabric to be printed. If there is a part whose thickness exceeds the first preset thickness and whose length is less than the first preset length but will push up the baffle of the second sensor when passing through the second sensor, it is also considered that there is an abnormal part in the fabric to be printed. When the above-mentioned abnormal part passes through the printing unit, the printing unit is controlled to lift up according to the thickness and length of the abnormal part, so that the abnormal part passes directly through the printing unit without being printed. This can reduce the situation where the fabric abnormally scratches the print head and causes damage to the print head. Moreover, there is no need to stop the machine or manually smooth the fabric or lift the print head, which can improve production efficiency and reduce waste.

[0104] In summary, the printing method provided by this invention detects the thickness of the fabric to be printed on the guide belt to identify abnormal portions in the fabric. If abnormal portions exist, the printing unit is controlled to lift up based on the thickness and length of the abnormal portions as they pass through. The abnormal portions include a first abnormal portion, which is a portion of the fabric to be printed that exceeds a first preset thickness and a first preset length. By automatically detecting abnormal portions in the fabric and automatically lifting the printing unit to allow them to pass, damage to the printhead caused by abnormal portions can be reduced, protecting the printhead. Furthermore, it eliminates the need for machine downtime, improving production efficiency and reducing waste.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; under the concept of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the present invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A printing method for a printing device, characterized by, include: The thickness of the fabric to be printed on the guide belt is detected to identify abnormal portions in the fabric to be printed; If there is an abnormal part in the fabric to be printed, the printing unit is controlled to lift up when the abnormal part passes the printing unit, according to the thickness and length of the abnormal part. The abnormal part includes a first abnormal part, which is a part in the fabric to be printed that has a thickness exceeding a first preset thickness and a length exceeding a first preset length. The thickness of the fabric to be printed on the detection guide belt is used to determine abnormal portions in the fabric to be printed, including: The thickness of the fabric to be printed is detected by the first sensor. If there is a portion in the fabric to be printed that has a thickness exceeding a first preset thickness and a length exceeding a first preset length, then it is determined that the first abnormal portion exists in the fabric to be printed. The method of detecting the thickness of the fabric to be printed on the guide belt to determine abnormal portions in the fabric to be printed also includes: If there is a portion in the fabric to be printed that has a thickness exceeding the first preset thickness and a length less than the first preset length, then the fabric to be printed is made to pass through the second sensor; If the fabric to be printed pushes up the baffle of the second sensor when it passes through the second sensor, it is determined that there is a second abnormal part in the fabric to be printed, wherein the baffle is set higher than the guide belt.

2. The method of claim 1, wherein, The method of detecting the thickness of the fabric to be printed on the guide belt to determine abnormal portions in the fabric to be printed also includes: If there is no part in the fabric to be printed that has a thickness exceeding the first preset thickness, then it is determined that there is no abnormal part in the fabric to be printed.

3. The method according to claim 1 or 2, characterized in that, After determining the thickness of the fabric to be printed on the detection guide belt to identify abnormal portions in the fabric, the method further includes: If the abnormal portion exists in the fabric to be printed, the transmission speed of the guide belt is reduced.

4. The method of claim 1, wherein, The step of controlling the printing unit to lift up based on the thickness and length of the abnormal portion includes: The starting position of the abnormal part is obtained. When the starting position of the abnormal part reaches the first position point before the position of the printing unit, the printing unit is controlled to lift up to a first height and the printing unit is continuously lifted up for a first time. The first time is the time corresponding to the starting position moving from the first position point to the second position point, and the second position point is the position point corresponding to the length of the abnormal part after the third position point after the printing unit position.

5. The method of claim 1, wherein, The first sensor is a photoelectric height sensor, and the second sensor includes a bracket and a baffle mounted on the bracket.

6. A printing device, characterized by, include: At least one processor, and A memory communicatively connected to the at least one processor, the memory storing instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1-5.

7. The printing device according to claim 6, wherein The printing device also includes a first sensor, which is a photoelectric height sensor.

8. The printing device according to claim 6, characterized by The printing device also includes a second sensor, which includes a bracket and a baffle mounted on the bracket.

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