CN114103510B - Digital jet printing method and conduction band type printing system - Google Patents
Digital jet printing method and conduction band type printing system Download PDFInfo
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- CN114103510B CN114103510B CN202111499252.XA CN202111499252A CN114103510B CN 114103510 B CN114103510 B CN 114103510B CN 202111499252 A CN202111499252 A CN 202111499252A CN 114103510 B CN114103510 B CN 114103510B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
- B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
- B41J29/393—Devices for controlling or analysing the entire machine ; Controlling or analysing mechanical parameters involving printing of test patterns
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Abstract
The embodiment of the invention relates to the field of printing machines, and discloses a digital jet printing method and a conduction band type printing system, wherein the system comprises a jet printing device, a conveying device and a camera, wherein the jet printing device is provided with the camera along one side of the conveying direction of the conveying device.
Description
Technical Field
The embodiment of the invention relates to the field of printing machines, in particular to a digital jet printing method and a conduction band type printing system.
Background
In the prior art, a conduction band type scanning printer generally drives an object to be printed to step at a preset speed through a transmission system, then controls an ink jet unit to jet ink on the object to be printed, and finally forms a pattern to finish printing. The transmission system generally comprises a stepping motor, a roller connected with a rotating shaft of the stepping motor, and a conveyor belt for placing an object to be printed, wherein the roller drives the conveyor belt to move.
In implementing the embodiments of the present invention, the inventors found that at least the following problems exist in the above related art: because the roller has machining error, and there are assembly error and other reasons in roller and the conveyer belt, lead to waiting to print the thing and often can have transmission error in the removal process at every turn, can not ensure to wait that the thing of printing accurately moves to preset position, the inkjet unit carries out the inkjet according to preset position this moment, has the inaccurate condition of step overprinting precision, will lead to spun pattern probably to have the condition of overlapping or appearing white, influences printing quality.
Disclosure of Invention
The embodiment of the application provides a digital jet printing method and a conduction band type printing system, which can solve the problem that the pattern jet printing position is inaccurate in the digital printing process.
The purpose of the embodiment of the invention is realized by the following technical scheme:
in order to solve the above technical problem, in a first aspect, an embodiment of the present invention provides a digital inkjet printing method applied to a conduction band printing system, where the system includes an inkjet printing device, a conveying device, and a camera, and the camera is disposed on one side of the inkjet printing device along a conveying direction of the conveying device, and the method includes: moving the object to be printed to a preset jet printing area through the conveying device, and jet printing patterns and mark points on the object to be printed; conveying the object to be printed according to a preset advancing amount; shooting the mark points actually sprayed and printed by the camera, and determining a stepping deviation value according to the positions of the mark points shot by the camera; according to the stepping deviation value, reducing the width of image data needing to be printed by the jet printing device, and closing a switch of a nozzle on the jet printing device corresponding to the deviation value forming part; and controlling the jet printing device after closing part of the nozzles to execute jet printing operation on the object to be printed according to the reduced image data.
In some embodiments, before the conveying the object to be printed according to the preset advance amount, the method further includes: setting the preset advancing amount according to the size of the jet printing range of the jet printing device and the maximum value of the theoretical stepping error; the conveying of the object to be printed according to the preset advancing amount comprises the following steps: and according to the preset advancing amount, the object to be printed is transmitted in a stepping mode, so that the mark point can be shot by the camera, and the current jet printing image and the next jet printing image of the object to be printed are overlapped theoretically.
In some embodiments, the shooting the mark points actually printed by the inkjet through the camera, and determining a step deviation value according to the positions of the mark points shot by the camera includes: judging whether the mark point is in a shooting center of the camera or not; if yes, the stepping deviation value is zero; and if not, determining the stepping deviation value according to the position relation between the mark point and the shooting center of the camera.
In some embodiments, the reducing the width of the image data to be printed by the inkjet printing device according to the step deviation value and turning off the switch of the nozzle corresponding to the deviation value forming portion on the inkjet printing device includes: determining the number of pixels of the mark point offset as the number of nozzles to be adjusted according to the stepping deviation value; and closing a plurality of nozzles on one side of the jet printing device close to the camera according to the number of the nozzles needing to be adjusted.
In some embodiments, before the moving the object to be printed to the preset jet printing area by the conveying device and jetting and printing the pattern and the mark point on the object to be printed, the method further comprises: acquiring a theoretical stepping pixel error of the conveying device; and adjusting the control parameters of a stepping motor in the conveying device according to the maximum value of the theoretical stepping pixel error.
In some embodiments, after the controlling the inkjet printing device after closing part of the nozzles to perform the inkjet printing job on the object to be printed according to the reduced image data, the method further includes: and recalculating the deviation value to determine the reduced width of the next jet printing image data and the number of switches of the nozzles needing to be closed.
In order to solve the above technical problem, in a second aspect, an embodiment of the present invention provides a conduction band printing system, including a controller, where the controller includes: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of the first aspect as described above.
In some embodiments, the system further comprises: the camera is connected with the controller and used for acquiring image data of an object to be printed; the conveying device is connected with the controller and is used for carrying and conveying the object to be printed; and the spray printing device is connected with the controller, and the camera is arranged on one side of the conveying direction of the conveying device.
In some embodiments, the camera is arranged on one side of the jet printing device along the conveying direction of the conveying device.
In some embodiments, the conveying device is provided with a stepping motor and a conveyor belt, the conveyor belt is used for carrying and conveying the object to be printed, and the stepping motor is used for controlling the conveyor belt to perform stepping conveying work.
In order to solve the above technical problem, in a third aspect, an embodiment of the present invention further provides a computer-readable storage medium storing computer-executable instructions for causing a computer to perform the method according to the first aspect.
To solve the above technical problem, in a fourth aspect, the embodiments of the present invention further provide a computer program product, the computer program product comprising a computer program stored on a computer-readable storage medium, the computer program comprising program instructions that, when executed by a computer, cause the computer to perform the method according to the first aspect.
Compared with the prior art, the invention has the beneficial effects that: the digital jet printing method comprises the steps of firstly moving an object to be printed to a preset jet printing area through the conveying device, jet printing patterns and mark points on the object to be printed, secondly conveying the object to be printed according to a preset advance amount, then shooting the mark points actually jet printed through the camera, determining a step deviation value according to the positions of the mark points shot by the camera, then reducing the width of image data required to be jet printed by the jet printing device according to the step deviation value, closing a switch of a nozzle corresponding to a deviation value forming part on the jet printing device, and finally controlling the jet printing device after closing part of the nozzles to perform jet printing operation on the object to be printed according to the reduced image data, thereby realizing accurate jet printing of the image data, improving the image printing quality and avoiding the phenomena of overlapping and white leaving.
Drawings
One or more embodiments are illustrated by the accompanying figures in the drawings that correspond thereto and are not to be construed as limiting the embodiments, wherein elements/modules and steps having the same reference numerals are represented by like elements/modules and steps, unless otherwise specified, and the drawings are not to scale.
Fig. 1 is a schematic diagram of an application environment of a digital jet printing method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a specific configuration of nozzles of the inkjet printing apparatus of the conduction band printing system of FIG. 1;
FIG. 3 is a flowchart illustrating a digital printing method according to an embodiment of the present invention;
fig. 4 is a working example of a digital jet printing method according to an embodiment of the present invention;
FIG. 5 is a schematic sub-flow chart of step S200 of the method shown in FIG. 3;
FIG. 6 is a schematic sub-flow chart of step S300 of the method shown in FIG. 3;
fig. 7 is a schematic flow chart of another digital inkjet printing method according to an embodiment of the present invention;
fig. 8 is a schematic hardware structure diagram of a conduction band printing system according to a second embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will aid those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any manner. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It should be noted that, if not conflicted, the various features of the embodiments of the invention may be combined with each other within the scope of protection of the present application. Additionally, while functional block divisions are performed in apparatus schematics, with logical sequences shown in flowcharts, in some cases, steps shown or described may be performed in sequences other than block divisions in apparatus or flowcharts. Further, the terms "first," "second," and the like, as used herein, do not limit the data and the execution order, but merely distinguish the same items or similar items having substantially the same functions and actions. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "horizontal", "left", "right" and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
In order to solve the problems that the printing precision is not high and the phenomenon of overlapping or blank leaving easily exists in the patterns sprayed and printed on the object to be printed when the existing conduction band type printing system executes the spray printing work, the embodiment of the invention provides a digital spray printing method and a conduction band type printing system.
Fig. 1 is a schematic diagram of an application environment of a digital inkjet printing method according to an embodiment of the present invention, where the application environment is a conduction band printing system, and the system includes: the printing device comprises a driving mechanism 1, a printing trolley 2, a spray head 3, a camera 4, an object to be printed 5 and a conveyor belt 6. Wherein the content of the first and second substances,
the driving mechanism 1 and the conveyor belt 6 constitute a conveying device, and the arrow in fig. 1 indicates the feeding conveying direction. The driving mechanism 1 at least comprises a stepping motor and a roller, the stepping motor provides power for the conveying device and can be used for controlling the travel amount of the conveying device, the roller is also the part indicated by the arrow of the driving mechanism 1 in fig. 1, when the conveying device works, the stepping motor drives the roller, and the roller drives the conveying belt 6 to move according to the preset travel amount so as to realize conveying of the object to be printed 5 placed on the conveying belt 6.
The printing trolley 2 is a jet printing device, the jet printing device is provided with a plurality of nozzles 3, each nozzle 3 is provided with a plurality of nozzles linearly arranged along a conveying direction, specifically, the specific structure of the nozzles on the nozzles 3 refers to fig. 2, the nozzles can be controlled to be opened or closed according to the needs of users, the number of the nozzles can be set according to the needs, for example, five hundred nozzles can be set.
The camera 4 is used for acquiring an image of the object 5 to be printed placed on the conveyor belt 6 and confirming a stepping deviation value according to the position of a mark point in the image. It is contemplated that in other embodiments, the camera 4 may be replaced with other components as long as they are capable of achieving image acquisition.
The object to be printed 5 is used for carrying ink sprayed by the printing trolley 2, can be a shell of a certain product, an artwork, a textile, a paper product and the like, can be made of paper, cloth, plastics and the like, and can be selected and designed according to actual needs.
Specifically, the embodiments of the present invention are further explained below with reference to the drawings.
Example one
The embodiment of the present invention provides a digital jet printing method, which is applied to a conduction band printing system, where the conduction band printing system may be a system as shown in the above application scenario and fig. 1, the conduction band printing system should at least include a jet printing device, a conveying device, and a camera, and the camera is disposed on one side of the jet printing device along a conveying direction of the conveying device, please refer to fig. 3, which shows a flow of the digital jet printing method provided by the embodiment of the present invention, and the digital jet printing method includes, but is not limited to, the following steps:
step S100: moving the object to be printed to a preset jet printing area through the conveying device, and jet printing patterns and mark points on the object to be printed;
in the embodiment of the present invention, referring to fig. 4 together, a working example of the digital jet printing method provided by the embodiment of the present invention is shown, first, as shown in the case of (a) in fig. 4, after the object 5 to be printed is moved to the preset jet printing area by the conveying device 6, the mark point is jet printed at the edge of the object 5 to be printed by the printing cart 2, and simultaneously, the pattern is jet printed at the proper position of the object 5 to be printed, wherein, the symbol "\9679;" in fig. 4 represents the mark point.
Step S200: conveying the object to be printed according to a preset advancing amount;
in the embodiment of the present invention, referring to fig. 4, after the mark point is printed, the conveyor belt 6 is controlled to convey the object to be printed 5 according to a preset travel amount, so that the position of the object to be printed 5 on the conveyor belt 6 reaches the position shown in (b) in fig. 4, that is, the position where the mark point can be shot by the camera. Specifically, referring to fig. 5, it shows a sub-flow of step S200 in the method shown in fig. 3, the delivering the object to be printed according to the preset amount of travel includes:
step S210: setting the preset advancing amount according to the size of the jet printing range of the jet printing device and the maximum value of the theoretical stepping error;
specifically, in the embodiment of the present invention, when the preset advance amount is set, the preset advance amount needs to be set by combining the size of the spray printing range of the printing trolley 2 and the maximum value of the step error of the conveying device, so that the position of the mark point subjected to spray printing enters the shooting range of the camera 4 after the conveying belt 6 moves, and after the preset advance amount is moved, the image subjected to next spray printing can coincide with the image subjected to current spray printing.
Step S220: and according to the preset advancing amount, the object to be printed is transmitted in a stepping mode, so that the mark point can be shot by the camera, and the current jet printing image and the next jet printing image of the object to be printed are overlapped theoretically.
In the embodiment of the invention, after the preset advancing amount is determined, the stepping transmission operation of the object to be printed is executed according to the preset advancing amount, so that the object to be printed is transmitted in a stepping mode, after the transmission is finished, the camera can shoot the mark point, and theoretically, a current jet printing image on the object to be printed is overlapped with a next jet printing image. In order to realize that the current jet printing image and the next jet printing image on the object to be printed are overlapped theoretically, the length of the preset pixel for reducing the step transmission needs to be changed, and the specific length of the preset pixel is set according to the requirement.
Step S300: shooting the mark points actually sprayed and printed through the camera, and determining a stepping deviation value according to the positions of the mark points shot by the camera;
in the embodiment of the present invention, please refer to fig. 4 together, theoretically, after the object to be printed is conveyed according to the preset advance amount, the mark point M should be located at a position right below the center of the camera, and a deviation value will occur with the center of the camera when an error occurs as shown in fig. 4. Therefore, whether there is a step deviation and a step deviation value can be determined by the relative position of the mark point captured by the camera on the camera, specifically, referring to fig. 6, which shows a sub-flow of step S300 in the method shown in fig. 3, where the capturing of the mark point actually printed by the camera and the determination of the step deviation value according to the position of the mark point captured by the camera include:
step S310: judging whether the mark point is in a shooting center of the camera or not; if yes, go to step S320; if not, jumping to step S330;
step S320: the step deviation value is zero;
step S330: and determining the stepping deviation value according to the position relationship between the mark point and the shooting center of the camera.
In the embodiment of the present invention, please refer to fig. 4 continuously, after the object to be printed 5 is conveyed according to the preset advance amount, the position of the object to be printed 5 on the conveying belt 6 reaches the position shown in the situation (b) in fig. 4, at this time, the camera 4 determines whether the mark point M is at the shooting center of the camera M according to the position of the mark point M actually shot and printed in the imaging sensor of the camera, if so, there is no step error, if not, there is a step error, at this time, the step deviation value may be calculated according to the distance between the mark point M and the shooting center point of the camera 4, that is, the distance between the imaging position of the mark point M and the center position of the imaging sensor on the imaging sensor.
Step S400: according to the stepping deviation value, reducing the width of image data needing to be printed by the jet printing device, and closing a switch of a nozzle on the jet printing device corresponding to the deviation value forming part;
in the embodiment of the invention, the number of the pixels of the offset of the mark points is determined as the number of the nozzles needing to be adjusted according to the stepping deviation value; and closing a plurality of nozzles on one side of the jet printing device close to the camera according to the number of the nozzles needing to be adjusted, so that when the jet printing device executes jet printing work next time, the reduced image data can be jet printed at a correct position, and meanwhile, the width of the image data needing to be printed next time is reduced, so that the jet printing range of the jet printing device is matched with the size of the image needing to be jet printed. In addition, the number of nozzles which are started to work next time can be controlled according to the number of pixels of the overlapped area acquired by the camera.
For example, if the number of pixels in the overlapped area is 4, the nozzles of the jet printing device corresponding to the deviation value forming part are controlled to be closed, and the width of the original printing data of the next jet printing is reduced by 4 pixels, so that the transmission error is overcome. Thus, the width of the print data is changed from 500 pixels in the theoretical previous printing to 496 pixels in the next printing. That is, the image of 500 pixel width is printed in the whole image area of the object to be printed in the previous time, and the image of 496 pixel width is printed in the whole image area of the object to be printed in the next time. The reduction is relative to the width that the nozzle can theoretically jet, for example, 500 pixels, and then the width of the printing can be 495 pixels, 496 pixels, 493 pixels and the like.
Step S500: and controlling the jet printing device after closing part of the nozzles to perform jet printing operation on the object to be printed according to the reduced image data.
In the embodiment of the invention, after the nozzles on the jet printing device and the image data needing jet printing next time are adjusted, the jet printing device after closing part of the nozzles is controlled to execute digital jet printing operation on the object to be printed according to the reduced image data, so that transmission error compensation is completed, accurate jet printing is realized, and the printed image has better feathering effect. The position of the reduced image data is adjusted by the unclosed nozzle, and the digital jet printing operation is performed by the unclosed nozzle after the adjustment is completed.
Further, after the inkjet printing device performs one inkjet printing operation, the method may return to the step S100 to perform calibration and inkjet printing for the next inkjet printing, that is, after the inkjet printing device controls to close some nozzles to perform the inkjet printing operation on the object to be printed according to the reduced image data, the method further includes: and recalculating the deviation value to determine the reduced width of the next jet printing image data and the number of switches of the nozzles needing to be closed. At this time, the pixel widths of the images ejected by the ejection device after each step of the conveyor belt may be different, and the process is a change, for example, the width of 500 pixels is for the first time of ejection, the width of 496 pixels is for the second time of ejection, and the width of 497 pixels is for the third time of ejection, when the width of 5000 pixels is in the image printing area of the whole to-be-printed object, ten times of printing are theoretically required to be completed, and eleven times or more may be actually required to be completed.
In some embodiments, before the mark point is printed, it is further required to confirm where the preset print area to which the transport device needs to transport the object to be printed 5 to is located at the beginning, so, in some embodiments, please refer to fig. 7, which shows a flow of another digital print method provided by an embodiment of the present invention, before the object to be printed is moved to the preset print area by the transport device and the mark point is printed on the object to be printed, the method further includes:
step S110: acquiring a theoretical stepping pixel error of the conveying device;
step S120: and adjusting the control parameters of a stepping motor in the conveying device according to the maximum value of the theoretical stepping pixel error.
In the embodiment of the present invention, it is necessary to obtain the theoretical step pixel error of the conveying device, and determine the maximum value of the theoretical step pixel error within the range of the theoretical step pixel error, so as to correct the control parameter of the stepping motor according to the maximum value, so that the stepping motor can drive the conveying belt to convey the conveying belt to the preset jet printing area. Specifically, in the embodiment of the present invention, the stepping motor may be controlled to step by a preset number of pixels at a time, for example, step by 5 pixels at a time (from 500 to 495), so that the driving error causes the result to be only the overlapping condition.
Example two
An embodiment of the present invention further provides a conduction band printing system, please refer to fig. 8, which shows a hardware structure of the conduction band printing system capable of executing the digital jet printing method described in fig. 3, 5 to 7. The conduction band printing system 100 may be the conduction band printing system shown in fig. 1.
Specifically, the guide belt printing system 100 includes: controller 11, jet printing device 12, camera 14 and conveying device 16. Wherein the content of the first and second substances,
and the jet printing device 12 is connected with the controller 11, and the camera 14 is arranged along one side of the conveying direction of the conveying device 16. The inkjet printing device 12 may be a printing cart 2 equipped with a head 3 as shown in the above application scenario and fig. 1.
The camera 14 is connected with the controller 11 and is used for acquiring image data of an object to be printed; the camera 14 may be the camera 4 as described above in the application scenario and shown in fig. 1.
The conveying device 16 is connected with the controller 11 and is used for carrying and conveying the object to be printed; the conveyor 16 may be the drive mechanism 1 and the conveyor belt 6 as described above in the context of the application and as shown in fig. 1. Specifically, the driving mechanism 1 may be a stepping motor, and in this case, the conveying device 16 is provided with a stepping motor and a conveyor belt, the conveyor belt is used for carrying and conveying the object to be printed, and the stepping motor is used for controlling the conveyor belt to perform stepping conveying work.
The conduction band type printing system 100 provided by the embodiment of the invention has the advantages of low manufacturing cost, compact structure and high operation efficiency, and can realize accurate jet printing on an object to be printed in a stepping compensation mode, improve the image printing and feathering effects and avoid overlapping and white exposure.
The controller 11 includes: at least one processor 101; and a memory 102 communicatively coupled to the at least one processor 101, with one processor 101 being illustrated in fig. 6. The memory 102 stores instructions executable by the at least one processor 101, and the instructions are executed by the at least one processor 101, so that the at least one processor 101 can execute the digital jet printing method described in fig. 3, 5 to 7. The processor 101 and the memory 102 may be connected by a bus or other means, and fig. 6 illustrates the connection by a bus as an example.
The memory 102 is used as a non-volatile computer-readable storage medium, and can be used to store non-volatile software programs, non-volatile computer-executable programs, and modules, such as program instructions/modules corresponding to the digital jet printing method in the embodiment of the present application, for example, the modules shown in fig. 5 to 6. The processor 101 executes various functional applications and data processing of the server by running the nonvolatile software program, instructions and modules stored in the memory 102, so as to implement the digital jet printing method of the above method embodiment.
The memory 102 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to use of the digital jet printing apparatus, and the like. Further, the memory 102 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some embodiments, memory 102 optionally includes memory located remotely from processor 101, which may be connected to a digital jet printing apparatus via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The one or more modules are stored in the memory 102, and when executed by the one or more processors 101, perform the digital jet printing method in any of the above-described method embodiments, for example, the method steps of fig. 3, 5 to 7 described above, to implement the functions of the modules and units.
The product can execute the method provided by the embodiment of the application, and has the corresponding functional modules and beneficial effects of the execution method. For technical details that are not described in detail in this embodiment, reference may be made to the methods provided in the embodiments of the present application.
Embodiments of the present application also provide a non-transitory computer-readable storage medium storing computer-executable instructions, which are executed by one or more processors, for example, to perform the method steps of fig. 3, 5 to 7 described above, and implement the functions of the modules.
Embodiments of the present application further provide a computer program product, including a computer program stored on a non-volatile computer-readable storage medium, where the computer program includes program instructions, which, when executed by a computer, cause the computer to perform the digital jet printing method in any of the above method embodiments, for example, to perform the method steps in fig. 3, fig. 5 to fig. 7 described above, so as to implement the functions of each module.
The invention provides a digital jet printing method and a conduction band type printing system, the system comprises a jet printing device, a conveying device and a camera, wherein the camera is arranged on one side of the jet printing device along the conveying direction of the conveying device, firstly, an object to be printed is moved to a preset jet printing area through the conveying device, patterns and mark points are jet-printed on the object to be printed, secondly, the object to be printed is conveyed according to a preset advancing amount, then, the mark points actually jet-printed are shot through the camera, a stepping deviation value is determined according to the positions of the mark points shot through the camera, then, according to the stepping deviation value, the width of image data needing to be jet-printed by the jet printing device is reduced, a switch of a nozzle corresponding to a deviation value forming part on the jet printing device is closed, and finally, according to the reduced image data, the jet printing device after part of the nozzles are closed is controlled to perform jet printing operation on the object to be printed, so that the image data are accurately jet-printed.
It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a general hardware platform, and certainly can also be implemented by hardware. It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware related to instructions of a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the 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, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A digital jet printing method is characterized by being applied to a conduction band type printing system, wherein the system comprises a jet printing device, a conveying device and a camera, the camera is arranged on one side of the jet printing device along the conveying direction of the conveying device, and the method comprises the following steps:
moving the object to be printed to a preset jet printing area through the conveying device, and jet printing patterns and mark points on the object to be printed;
setting a preset advancing amount according to the size of a jet printing range of the jet printing device and the maximum value of the theoretical stepping error;
according to the preset advancing amount, the object to be printed is transmitted in a stepping mode, so that the camera can shoot the mark point, and the current jet printing image and the next jet printing image of the object to be printed are overlapped theoretically;
shooting the mark points actually sprayed and printed through the camera, and determining a stepping deviation value according to the positions of the mark points shot by the camera;
according to the stepping deviation value, reducing the width of image data needing to be printed by the jet printing device, and closing a switch of a nozzle on the jet printing device corresponding to the deviation value forming part;
and controlling the jet printing device after closing part of the nozzles to perform jet printing operation on the object to be printed according to the reduced image data.
2. The digital jet printing method according to claim 1,
the step deviation value is determined according to the position of the mark point shot by the camera, and the step deviation value comprises the following steps:
judging whether the mark point is in a shooting center of the camera or not;
if yes, the stepping deviation value is zero;
and if not, determining the stepping deviation value according to the position relation between the mark point and the shooting center of the camera.
3. The digital jet printing method according to claim 1 or 2,
the step of reducing the width of the image data to be printed by the printing device according to the step deviation value and closing the switch of the nozzle corresponding to the deviation value forming part on the printing device comprises the following steps:
determining the number of the pixels of the mark point deviation as the number of the nozzles needing to be adjusted according to the stepping deviation value;
and closing a plurality of nozzles on one side of the jet printing device close to the camera according to the number of the nozzles needing to be adjusted.
4. The digital jet printing method according to claim 1,
before the object to be printed is moved to a preset jet printing area through the conveying device and patterns and marking points are jet printed on the object to be printed, the method further comprises the following steps:
acquiring a theoretical stepping pixel error of the conveying device;
and adjusting the control parameters of a stepping motor in the conveying device according to the maximum value of the theoretical stepping pixel error.
5. The digital jet printing method according to claim 1,
after the controlling the jet printing device after closing part of the nozzles to perform jet printing operation on the object to be printed according to the reduced image data, the method further comprises the following steps:
and recalculating the deviation value to determine the reduced width of the next jet printing image data and the number of switches of the nozzles needing to be closed.
6. A conduction band printing system comprising a controller, the controller comprising:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-5.
7. The conduction band printing system of claim 6, wherein the system further comprises:
the camera is connected with the controller and used for acquiring image data of an object to be printed;
the conveying device is connected with the controller and is used for carrying and conveying the object to be printed;
and the spray printing device is connected with the controller, and the camera is arranged on one side of the conveying direction of the conveying device.
8. The conduction band printing system of claim 7,
the camera is arranged on one side of the jet printing device along the conveying direction of the conveying device.
9. The ribbon printing system of claim 7, further comprising:
the conveying device is provided with a stepping motor and a conveying belt, the conveying belt is used for carrying and conveying the object to be printed, and the stepping motor is used for controlling the conveying belt to execute stepping conveying work.
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| CA2155505C (en) * | 1994-08-10 | 2000-05-16 | Jiro Moriyama | Ink jet printing method and apparatus |
| JP4574141B2 (en) * | 2003-08-29 | 2010-11-04 | キヤノン株式会社 | Printing apparatus and adjustment method |
| US7938527B2 (en) * | 2006-09-19 | 2011-05-10 | Ricoh Company, Ltd. | Ink, ink cartridge, ink jet recording apparatus, and ink jet recording method |
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| CN106042623B (en) * | 2016-06-03 | 2018-11-23 | 杭州宏华数码科技股份有限公司 | The digital spray printing printing method and printing machine frame synchronous with rotary scream printing |
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