CN117416133A - Printing initial position offset value acquisition method, calibration method, device and equipment thereof - Google Patents
Printing initial position offset value acquisition method, calibration method, device and equipment thereof Download PDFInfo
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- CN117416133A CN117416133A CN202210809221.8A CN202210809221A CN117416133A CN 117416133 A CN117416133 A CN 117416133A CN 202210809221 A CN202210809221 A CN 202210809221A CN 117416133 A CN117416133 A CN 117416133A
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- 238000007639 printing Methods 0.000 title claims abstract description 472
- 238000000034 method Methods 0.000 title claims abstract description 60
- 238000004590 computer program Methods 0.000 claims description 7
- 229910003460 diamond Inorganic materials 0.000 claims description 3
- 239000010432 diamond Substances 0.000 claims description 3
- 238000007641 inkjet printing Methods 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 11
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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
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
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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 invention discloses a method for acquiring a printing initial position offset value, a calibration method, a device and equipment thereof, and relates to the technical field of inkjet printing. According to the method, the first reference part and the first calibration part in the first printing initial position calibration chart are printed respectively from the reference printing initial position by controlling the inkjet trolley at different printing speeds, the second reference part and the second calibration part in the corresponding second printing initial position calibration chart are obtained, then the printing initial position offset values corresponding to different printing speeds are obtained according to the second reference part and the second calibration part, the printing initial positions corresponding to the inkjet trolley at different printing speeds can be adjusted correspondingly according to the printing initial position offset values, and the fact that the actual printing initial positions or the ink drop positions of all layers are consistent when the inkjet trolley prints at different printing speeds for multi-layer printing is ensured, so that the image printing quality is maintained, and the image printing efficiency is ensured.
Description
Technical Field
The present invention relates to the field of inkjet printing technologies, and in particular, to a method for obtaining a printing start position offset value, a calibration method, a device and equipment thereof.
Background
In actual print production applications, a multilayer printing method is used to print images for better printing effect. For example, the white ink is used for priming, then the color ink is printed on the white ink, and then a layer of varnish or gold stamping ink is printed on the color ink. For another example, a layer of color ink is printed first, then a layer of white ink (the middle spacer layer) is printed, and then a layer of color ink is printed. In the case of multi-layer printing, in order to improve productivity, the ink-jet carriage is controlled to print at a higher printing speed under the condition that the white ink bottom layer or the middle isolation layer does not need to consider the effect, and the image quality layers such as the color ink layer, the gloss oil layer or the gold stamping layer are printed at a lower printing speed because the printing effect needs to be considered. The printing speed of the inkjet carriage in the printing direction (hereinafter referred to as X-direction) is varied when printing different layers throughout the image printing process, and is therefore also referred to as variable speed printing. But variable speed printing can cause the actual print start position of the layer in the X direction to be misaligned, thereby affecting the final image printing effect and print quality.
Disclosure of Invention
In view of this, the invention provides a method for obtaining a printing start position offset value, a calibration method, a device and equipment thereof, which are used for solving the problem that the image printing effect is affected by the fact that the image layer cannot be aligned during variable speed printing in the prior art.
In a first aspect, the present invention provides a print start position offset value acquisition method, the method including:
acquiring a first printing initial position calibration chart, wherein the first printing initial position calibration chart comprises at least one first reference part and a first calibration part; the first reference part comprises a first preset scale pattern; the first calibration part comprises a first preset graph;
controlling an inkjet trolley to print a first reference part in a first printing initial position calibration chart from a reference printing initial position along a printing direction at a first printing speed to obtain a second reference part in a second printing initial position calibration chart;
controlling the inkjet trolley to print a first calibration part in the first printing initial position calibration chart from the reference printing initial position along the printing direction at a second printing speed to obtain a second calibration part in a second printing initial position calibration chart;
and acquiring a second printing initial position offset value corresponding to the second printing speed according to the second reference part and the second calibration part.
Preferably, the scale of the first preset scale map takes pixels as a unit, and a scale number is marked above or below the first preset scale map, wherein a 0 scale line is located at the middle position of the first preset scale map.
Preferably, the first preset pattern is any one of triangle, diamond and star; the first preset graph is located right below the scale mark of the first preset scale graph 0.
Preferably, a line segment perpendicular to the printing direction is arranged at a position above the center of the first preset pattern.
Preferably, the acquiring, according to the second reference portion and the second calibration portion, a second printing start position offset value corresponding to the second printing speed includes:
acquiring a second preset graduated scale of the second reference part;
acquiring a second preset graph in the second calibration part;
acquiring a scale value of the second preset graph under the second preset scale graph;
and acquiring the second printing initial position offset value according to the scale value.
Preferably, the acquiring, according to the second reference portion and the second calibration portion, a second printing start position offset value corresponding to the second printing speed includes:
the image acquisition device is controlled to acquire the second printing initial position calibration chart to obtain a third printing initial position calibration chart, wherein the third printing initial position calibration chart comprises a third reference part and a third calibration part;
identifying a third preset scale pattern of the third reference portion and a third preset pattern of the third calibration portion;
acquiring a scale value of the third preset graph under the third preset scale graph;
and acquiring the second printing initial position offset value according to the scale value.
In a second aspect, the present invention provides a printing start position calibration method, the method comprising:
acquiring the second printing start position offset value according to any one of the first aspect;
acquiring a reference printing initial position corresponding to the first printing speed;
acquiring a second printing initial position corresponding to the second printing speed according to the reference printing initial position and the second printing initial position offset value;
and when the inkjet trolley prints at a second printing speed along the printing direction, controlling the inkjet trolley to start ink-out printing at the second printing starting position.
In a third aspect, the present invention provides a printing start position offset value acquisition apparatus, the apparatus comprising:
the first printing initial position calibration chart acquisition module is used for acquiring a first printing initial position calibration chart, wherein the first printing initial position calibration chart comprises at least one first reference part and a first calibration part; the first reference part comprises a first preset scale pattern; the first calibration part comprises a first preset graph;
the first printing module is used for controlling the inkjet trolley to print a first reference part in the first printing initial position calibration chart from a reference printing initial position along the printing direction at a first printing speed to obtain a second reference part in the second printing initial position calibration chart;
the second printing module is used for controlling the inkjet trolley to print the first calibration part in the first printing initial position calibration chart from the reference printing initial position along the printing direction at a second printing speed to obtain a second calibration part in a second printing initial position calibration chart;
and the first offset value acquisition module is used for acquiring a second printing initial position offset value corresponding to the second printing speed according to the second reference part and the second calibration part.
In a fourth aspect, an embodiment of the present invention provides a printing start position calibration apparatus, including:
a second offset value acquisition module configured to acquire a second printing start position offset value according to any one of claims 1 to 6;
the reference printing initial position acquisition module is used for acquiring a reference printing initial position corresponding to the first printing speed;
a second printing start position obtaining module, configured to obtain a second printing start position corresponding to the second printing speed according to the reference printing start position and the second printing start position offset value;
and the third printing module is used for controlling the inkjet trolley to start ink-out printing at the second printing starting position when the inkjet trolley prints at the second printing speed along the printing direction.
In a fifth aspect, the present invention provides a printing apparatus comprising: at least one processor, at least one memory and computer program instructions stored in the memory, which when executed by the processor, implement the method as in the first aspect of the embodiments described above.
In a sixth aspect, the present invention provides a storage medium having stored thereon computer program instructions which, when executed by a processor, implement a method as in the first aspect of the embodiments described above.
In summary, the beneficial effects of the invention are as follows:
according to the printing initial position offset value acquisition method, the calibration method, the device and the equipment, the first reference part and the first calibration part in the first printing initial position calibration chart are respectively printed from the reference printing initial position by controlling the inkjet trolley at different printing speeds, so that the second reference part and the second calibration part in the corresponding second printing initial position calibration chart are obtained, the printing initial position offset values corresponding to different printing speeds are acquired according to the second reference part and the second calibration part, the corresponding printing initial positions of the inkjet trolley at different printing speeds can be correspondingly adjusted according to the printing initial position offset values, and the fact that the actual printing initial positions or the ink drop positions of all layers are consistent when the inkjet trolley prints at different printing speeds for multi-layer printing is ensured, so that the image printing quality is maintained, and the image printing efficiency is ensured.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described, and it is within the scope of the present invention to obtain other drawings according to these drawings without inventive effort for a person skilled in the art.
Fig. 1a is a schematic diagram of the location of an ink drop point according to an embodiment of the present invention.
Fig. 1b is a flowchart of a method for acquiring a printing start position offset value according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a first printing start position calibration chart according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a first printing start position calibration chart according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a first printing start position calibration chart according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of a second printing start position calibration chart according to an embodiment of the present invention.
Fig. 6 is a schematic diagram of a first printing start position calibration chart according to an embodiment of the present invention.
Fig. 7 is a schematic diagram of a second printing start position calibration chart according to an embodiment of the present invention.
Fig. 8 is a schematic diagram of a first printing start position calibration chart according to an embodiment of the present invention.
Fig. 9 is a flowchart of a printing start position calibration method according to an embodiment of the invention.
Fig. 10 is a schematic diagram of the configuration of a printing start position offset value acquisition device according to an embodiment of the present invention.
Fig. 11 is a schematic diagram of a printing start position calibration apparatus according to an embodiment of the present invention.
Fig. 12 is a schematic structural view of a printing apparatus according to an embodiment of the present invention.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely configured to illustrate the invention and are not configured to limit the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by showing examples of the invention.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
Example 1
The embodiment of the invention provides a method for acquiring a printing initial position offset value, which is suitable for ink-jet printing equipment, including reciprocating scanning ink-jet printing equipment, onepass ink-jet printing equipment, single pass high-speed ink-jet printing equipment and the like, wherein the ink-jet printing equipment can control an ink-jet trolley to move along a printing direction (X direction) at different movement speeds and jet ink drops on a printing medium.
When the velocity of the inkjet carriage moving in the X direction (also referred to as the printing velocity) is different, the landing position of the ink droplets ejected therefrom on the printing medium is also different. The inkjet carriage is controlled to move in the X direction at speeds Va, vb, vc, and Vh, respectively, and ejection of ink droplets is started at a set print start position S0. Due to the inertia effect, the ink drop does not vertically drop to the position S0, but will appear parabolic, and the faster the movement speed of the inkjet carriage, the further the ink drop is from the final drop position S0, so that the actual printing start position deviates from the set printing start position S0. When Va < Vb < Vc < Vh, as shown in fig. 1a, the larger the velocity, the further the respective ink drop point positions (actual print start positions) S1, S2, S3, and S4 are from S0. In variable speed printing, if the printing start position is set to the same value when each layer is printed, the actual printing start positions of the layers are inevitably inconsistent, so that the layers cannot be aligned, and the image quality is affected. Therefore, it is necessary to calibrate the printing start position of the inkjet carriage at the time of variable speed printing, and different printing speeds start inkjet ink droplets according to different start printing positions so that the ink droplet landing positions (actual printing start positions) at the time of starting printing are uniform.
In one embodiment, the inkjet carriage is controlled to perform variable speed printing at the printing speed Va and the printing speed Vb during printing, and the printing start position offset value of the printing speed Vb with respect to the printing speed Va may be obtained directly from the distance between the inkjet carriage and the printing medium, the printing speed Va, and the printing speed Vb. Let the distance between the inkjet carriage and the printing medium, i.e. the printing height, be Hp, the drop velocity of the ink droplets be Vd, and under the condition that the inkjet carriage is stationary, the vertical drop time of the ink droplets from the nozzle to the printing medium is calculated as: td=hp/Vd. For example, in a flat advertisement ink jet printer, the print height and waveform are often set to default fixed values, i.e., the print height hp=2mm, and the drop velocity vd=6m/s is obtained in the known waveform, then the time from the nozzle to the printing medium is calculated to be td= 0.000333ms. This is the theoretical value for the case of an inkjet trolley at rest. Then when the inkjet carriage moves in the X direction, the ink droplets land in a parabolic manner, and when the printing speeds are Va and Vb, respectively, the difference in the distances (offset value) d0 of the ink droplet landing points is: d0 = (Vb-Va) ×td= (Vb-Va) × (Hp/Vd). When the print height and waveform are unchanged, the ink drop point offset value is related to the print speed. When the print height and waveform are different, the offset value needs to be comprehensively considered according to the height, waveform and print speed.
And taking the printing initial position corresponding to the printing speed Va as a reference printing initial position and recording as S0, wherein the printing initial position corresponding to the second printing speed is S0-d0, and controlling the printing equipment to correspondingly adjust the printing initial position when the printing equipment is used for printing at different printing speeds, so that the actual printing initial position of the inkjet trolley is consistent when the inkjet trolley is used for printing at the printing speed Va and the printing speed Vb along the X direction, and the printing quality of images is ensured. However, this method requires the acquisition of the drop velocity from the drive waveform and is not intuitive and convenient for the user. The method for acquiring the printing initial position offset value provided by the embodiment can conveniently and intuitively acquire the printing initial position offset value.
Referring to fig. 1b, the method for obtaining the offset value of the printing start position specifically includes the following steps:
s1: acquiring a first printing initial position calibration chart, wherein the first printing initial position calibration chart comprises at least one first reference part and a first calibration part; the first reference part comprises a first preset scale pattern; the first calibration part comprises a first preset graph;
s2: controlling an inkjet trolley to print a first reference part in a first printing initial position calibration chart from a reference printing initial position along a printing direction at a first printing speed to obtain a second reference part in a second printing initial position calibration chart;
s3: controlling the inkjet trolley to print a first calibration part in the first printing initial position calibration chart from the reference printing initial position along the printing direction at a second printing speed to obtain a second calibration part in a second printing initial position calibration chart;
s4: and acquiring a second printing initial position offset value corresponding to the second printing speed according to the second reference part and the second calibration part.
As shown in fig. 2, the first printing start position calibration chart includes a first reference portion 11 and a first calibration portion 12, and the first reference portion 11 includes a scale chart, which is recorded as a first preset scale chart, preferably, each scale unit in the first preset scale chart is 10 pixels, and a scale number is marked above or below a plurality of scale lines in the first preset scale chart. Illustratively, as shown in fig. 3, the scale marks at the middle position are marked with 0, the positive scale marks with positive scale marks (+200, +400, +600) at 19 intervals in the positive direction along the X direction, and the negative scale marks with negative scale marks (-200, -400, -600) at 19 intervals in the negative direction along the X direction. A first calibration part is arranged right below the 0 scale mark in the first preset scale map. The first calibration part comprises a preset graph which is marked as a first preset graph, the first preset graph is triangular, and the vertex position above the triangle is aligned with the 0 scale mark in the first preset scale graph. In another embodiment, as shown in fig. 4, the first preset pattern includes, in addition to the triangle, a line segment perpendicular to the X-direction provided at the vertex above the triangle, which line segment together with the vertex above the triangle is used to indicate the position of the first calibration portion 11 with respect to the first reference portion 12. In other embodiments, the first preset pattern may also be a pattern such as a diamond, a quadrangle star, a pentagram, or other custom pattern.
After the upper computer in the printing device acquires the first printing initial position calibration chart, firstly controlling the inkjet trolley in the printing device to start to jet ink drops along the X direction at a first printing speed (serving as a reference printing speed) from a set reference printing initial position and print a first reference part in the first printing initial position calibration chart on a printing medium, and obtaining a second reference part in a second printing initial position calibration chart; then, the inkjet carriage is controlled to eject ink droplets from the reference print start position as well at the second print speed and print the first calibration portion in the first print start position calibration chart on the print medium, and the second calibration portion in the second print start position calibration chart is obtained. The second reference part and the second calibration part in the second printing initial position calibration chart can be used for obtaining the printing initial position offset value of the second printing speed relative to the printing initial position of the first printing speed, and the second printing initial position corresponding to the second printing speed can be obtained according to the offset value and the reference printing initial position.
Exemplary, the second print start position calibration chart obtained by printing is shown in fig. 5. In fig. 5, the vertex position above the triangle in the second calibration chart 22 is aligned with the second graduation mark on the left of the 0 graduation mark, and it is known that the printing start position offset value corresponding to the second printing speed is-20 pixels (10 pixels per graduation). Preferably, the distance value of 20 pixels is converted into a millimeter value d1 (mm), and the reference printing start position set for the first printing speed is set to X mm, and then, at the time of actual printing, the second printing start position set for the second printing speed should be: (X-d 1) mm.
In other embodiments, the printing start positions corresponding to N different printing speeds need to be calibrated, N is a natural number greater than or equal to 1, and the first printing start position calibration chart includes N first reference portions and N first calibration portions. As an example, the first printing start position calibration chart is shown in fig. 6, and includes 3 first reference portions 11 (respectively denoted as first reference portion 11-1, second first reference portion 11-2, third first reference portion 11-3) and 3 first calibration portions 12 (respectively denoted as first calibration portion 12-1, second first calibration portion 12-2, third first calibration portion 12-3) arranged in the X direction. In printing the first printing start position calibration chart, the inkjet carriage is first controlled to start ejecting ink droplets from the reference printing start position in the X direction at the first printing speed and print the 3 first reference portions 11 in the first printing start position calibration chart on the printing medium, resulting in 3 second reference portions 21 (respectively denoted as first second reference portion 21-1, second reference portion 21-2, and third second reference portion 21-3) in the second printing start position calibration chart. The 3 different printing speeds are respectively recorded as a second printing speed, a third printing speed and a fourth printing speed, then the inkjet trolley is controlled to start to jet ink drops from a reference printing starting position along the X direction at the second printing speed to print the first calibration part 12-1, the first second calibration part 22-1 is correspondingly obtained, then the inkjet trolley is controlled to start to jet ink drops from the reference printing starting position along the X direction at the third printing speed to print the second first calibration part 12-2, the first second calibration part 22-2 is obtained, finally the inkjet trolley is controlled to start to jet ink drops from the reference printing starting position along the X direction at the fourth printing speed to print the third first calibration part 12-3, and the third second calibration part 22-3 is obtained. The resulting second print start position calibration chart is shown in fig. 7.
In the second printing start position calibration chart shown in fig. 7, the vertex position above the triangle in the first second calibration chart 22-1 is aligned with the second scale line left to the 0 scale line in the first second reference portion 21-1, and it is known that the printing start position offset value corresponding to the second printing speed is-20 pixels (10 pixels per scale). Preferably, the distance value of 20 pixels is converted into a millimeter value d1 (mm), and the reference printing start position set for the first printing speed is set to X mm, and then, at the time of actual printing, the third printing start position set for the second printing speed should be: (X-d 1) mm. The position of the vertex above the triangle in the second calibration chart 22-2 is aligned with the third scale mark on the right of the 0 scale mark in the second reference portion 21-2, and it is known that the printing start position offset value corresponding to the third printing speed is +30 pixels (10 pixels per scale). Preferably, the distance value of 30 pixels is converted into a millimeter value d2 (mm), and the reference printing start position set for the first printing speed is set to X mm, and then, at the time of actual printing, the third printing start position set for the third printing speed should be: (X+d2) mm. The position of the vertex above the triangle in the third second calibration chart 22-3 is aligned with the fourth scale mark on the left of the 0 scale mark in the second reference portion 21-3, and it is known that the printing start position offset value corresponding to the fourth printing speed is-40 pixels (10 pixels per scale). Preferably, the distance value of 40 pixels is converted into a millimeter value d3 (mm), and the reference printing start position set for the first printing speed is set to X mm, and then, at the time of actual printing, the fourth printing start position set for the fourth printing speed should be: (X-d 3) mm. Wherein d1, d2, d3 are positive numbers.
In another embodiment, as shown in fig. 8, 3 first reference parts 11 and first calibration parts 12 may also be arranged in the Y direction. The specific printing method and the offset value obtaining method are similar to those of the example shown in fig. 5, and are not repeated here. It should be noted that the first calibration chart of the printing start position shown in fig. 6 and fig. 8 is only for illustration, and is not limited to the first calibration chart of the printing start position, and the arrangement positions of the plurality of first reference portions and the first calibration portions may be determined according to the practical situation, and are not limited to the arrangement along the X direction or the Y direction in fig. 6 or fig. 8.
In one embodiment, a second printing start position calibration chart (electronic manuscript image) is acquired through an image acquisition device, the third printing start position calibration chart comprises a third reference part (corresponding to a second reference part) and a third calibration part (corresponding to the second calibration part), then the third reference part and the third calibration part in the third printing start position calibration chart are identified by utilizing an image identification technology, and a scale value of a third preset graph in the third calibration part, which is different from a scale line 0 in the third reference part, is acquired, so that a printing start position offset value of a second printing speed (or a third printing speed, a fourth printing speed and the like) relative to the first printing speed is acquired.
After the printing initial position offset values corresponding to different printing speeds are obtained according to the second printing initial position calibration chart, the corresponding second printing initial positions (or third printing initial positions and fourth printing initial positions) of all the inkjet carts when printing at the second printing speed (or third printing speed and fourth printing speed) can be adjusted according to the offset values, so that the fact that the actual printing initial positions of all the layers are consistent or the ink drop points are consistent when the inkjet carts print in multiple layers at different printing speeds along X is ensured, and the image printing quality is ensured.
Example two
Based on the above implementation one, an embodiment of the present invention provides a method for calibrating a printing start position, please refer to fig. 9, which includes:
s5: acquiring a second printing initial position offset value;
s6: acquiring a reference printing initial position corresponding to the first printing speed;
s7: acquiring a second printing initial position corresponding to the second printing speed according to the reference printing initial position and the second printing initial position offset value;
s8: and when the inkjet trolley prints at a second printing speed along the printing direction, controlling the inkjet trolley to start ink-out printing at the second printing starting position.
Specifically, according to the method for obtaining a printing start position offset value in the first embodiment, the second printing start position offset value is-d 1, and the reference printing start position corresponding to the first printing speed is X, then, in actual printing, the second printing start position set for the second printing speed should be: x-d1. Similarly, when there are a plurality of printing start positions corresponding to different printing speeds to be calibrated, for example, a third printing speed and a fourth printing speed, the method for obtaining the printing start position offset value according to the first embodiment obtains that the third printing speed and the fourth printing start position offset value corresponding to the fourth printing speed are +d2 and +d3 respectively, and the reference printing start position corresponding to the first printing speed is X, then, in actual printing, the third printing start position set for the third printing speed should be: x+d2. The fourth print start position set for the fourth print speed should be: x-d3. (d 1, d2, d3 are all positive numbers.)
It should be noted that the examples of fig. 5 and 7 are second printing start position calibration charts obtained by moving the inkjet carriage in the X direction to eject ink droplets. In the reciprocating scanning inkjet printing apparatus, the inkjet carriage can perform inkjet printing in the X direction and in the reverse direction of the X direction, and when the inkjet carriage starts to move in the reverse direction of the X direction to eject ink, then the printing start position of the inkjet carriage at the first printing speed at this time is: (X+F), wherein X is a reference print start position and F is a print width; the print start position at the second print speed is: x+f+d1 (the second printing speed is greater than the first printing speed, and the printing start position of the second printing speed should be earlier than the printing start position of the first printing speed when printing is started in the direction of the X direction). Similarly, when the printing start positions of the third printing speed and the fourth printing speed are calibrated, the printing start position at the third printing speed is (x+f-d 2), and the printing start position at the fourth printing speed is (x+f+d3).
In one embodiment, the printing start position offset values (pixel values) corresponding to the second printing speed, the third printing speed and the fourth printing speed are obtained according to the obtained second start position calibration chart, the printing start position offset values are respectively input into the printing device through a man-machine interaction interface of a host computer of the printing device, the printing device converts the printing start position offset values into millimeter values, and when the printing is performed by using the corresponding printing speeds, the printing start position of the printing device is automatically adjusted. The initial position offset values corresponding to the first printing speed, the second printing speed, the third printing speed and the fourth printing speed are respectively recorded as adj_1, adj_2, adj_3 and adj_4, the first printing speed is taken as a reference printing speed, the corresponding printing initial position is taken as a reference printing initial position, and then the values input into the man-machine interaction interface are respectively: 0, -20, +30, -40. When the inkjet trolley is controlled to print at the first printing speed, the second printing speed, the third printing speed and the fourth printing speed, the printing starting positions of the inkjet trolley are automatically adjusted according to the input printing starting position offset values corresponding to the printing speeds, so that the actual printing starting positions of all layers are consistent and the ink drop points are consistent when the inkjet trolley prints at different printing speeds, and the image printing quality is ensured.
Example III
Referring to fig. 10, an embodiment of the present invention provides a device 200 for obtaining a printing start position offset value, where the device 200 includes:
a first printing start position calibration chart obtaining module 201, configured to obtain a first printing start position calibration chart, where the first printing start position calibration chart includes at least a first reference portion and a first calibration portion; the first reference part comprises a first preset scale pattern; the first calibration part comprises a first preset graph;
a first printing module 202, configured to control the inkjet dolly to print a first reference portion in the first printing start position calibration chart from a reference printing start position at a first printing speed along a printing direction, so as to obtain a second reference portion of a second printing start position calibration chart;
a second printing module 203, configured to control the inkjet dolly to print, along the printing direction, a first calibration part in the first printing start position calibration chart from the reference printing start position at a second printing speed, so as to obtain a second calibration part of a second printing start position calibration chart;
a first offset value obtaining module 204, configured to obtain a second printing start position offset value corresponding to the second printing speed according to the second reference portion and the second calibration portion.
In summary, according to the print start position offset value obtaining device provided by the embodiment of the invention, the first reference part and the first calibration part in the first print start position calibration chart are respectively printed from the reference print start position by controlling the inkjet trolley at different print speeds, so that the second reference part and the second calibration part in the corresponding second print start position calibration chart are obtained, then the print start position offset values corresponding to different print speeds are obtained according to the second reference part and the second calibration part, and the corresponding print start positions of the inkjet trolley at different print speeds can be correspondingly adjusted according to the print start position offset values, so that the actual print start positions or the ink drop points of all layers are consistent when the inkjet trolley prints at different print speeds, thereby not only maintaining the image print quality, but also ensuring the image print efficiency.
Example IV
Referring to fig. 11, an embodiment of the present invention provides a printing start position calibration apparatus 400, where the apparatus 400 includes:
a second offset value acquisition module 401 for acquiring a second printing start position offset value according to any one of claims 1 to 6;
a reference print start position acquisition module 402, configured to acquire a reference print start position corresponding to a first printing speed;
a second print start position obtaining module 403, configured to obtain a second print start position corresponding to the second print speed according to the reference print start position and the second print start position offset value;
and a third printing module 404, configured to control the inkjet carriage to start ink-out printing at the second printing start position when the inkjet carriage prints at the second printing speed along the printing direction.
In summary, according to the device for acquiring the printing start position offset value provided by the embodiment of the invention, the corresponding printing start positions of the inkjet trolley at different printing speeds can be adjusted correspondingly according to the printing start position offset value, so that the actual printing start positions or ink drop positions of all layers are consistent when the inkjet trolley prints at different printing speeds for multi-layer printing, thereby not only maintaining the image printing quality, but also ensuring the image printing efficiency.
Example III
In addition, the print start position offset value acquisition method of the embodiment of the present invention may be implemented by a printing apparatus. Fig. 12 shows a schematic hardware configuration of a printing apparatus according to an embodiment of the present invention.
The printing device may include a processor 301 and a memory 302 storing computer program instructions.
In particular, the processor 301 may include a Central Processing Unit (CPU), or an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), or may be configured as one or more integrated circuits that implement embodiments of the present invention.
Memory 302 may include mass storage for data or instructions. By way of example, and not limitation, memory 302 may comprise a Hard Disk Drive (HDD), floppy Disk Drive, flash memory, optical Disk, magneto-optical Disk, magnetic tape, or universal serial bus (Universal Serial Bus, USB) Drive, or a combination of two or more of the foregoing. Memory 302 may include removable or non-removable (or fixed) media, where appropriate. Memory 302 may be internal or external to the data processing apparatus, where appropriate. In a particular embodiment, the memory 302 is a non-volatile solid-state memory. In particular embodiments, memory 302 includes Read Only Memory (ROM). The ROM may be mask programmed ROM, programmable ROM (PROM), erasable PROM (EPROM), electrically Erasable PROM (EEPROM), electrically rewritable ROM (EAROM), or flash memory, or a combination of two or more of these, where appropriate.
The processor 301 reads and executes the computer program instructions stored in the memory 302 to implement any one of the printing start position offset value acquisition method and the calibration method of the above-described embodiments.
In one example, the printing device may also include a communication interface 303 and a bus 310. As shown in fig. 12, the processor 301, the memory 302, and the communication interface 303 are connected to each other by a bus 310 and perform communication with each other.
The communication interface 303 is mainly used to implement communication between each module, device, unit and/or apparatus in the embodiment of the present invention.
Bus 310 includes hardware, software, or both, that couple components of the printing device to one another. By way of example, and not limitation, bus 310 may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an infiniband interconnect, a Low Pin Count (LPC) bus, a memory bus, a micro channel architecture (MCa) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a video electronics standards association local (VLB) bus, or other suitable bus, or a combination of two or more of the above. Bus 310 may include one or more buses, where appropriate. Although embodiments of the invention have been described and illustrated with respect to a particular bus, the invention contemplates any suitable bus or interconnect.
Example IV
In addition, in combination with the method for acquiring the offset value of the printing start position and the calibration method in the above embodiments, the embodiments of the present invention may be implemented by providing a computer readable storage medium. The computer readable storage medium has stored thereon computer program instructions; the computer program instructions, when executed by the processor 301, implement any of the print start position offset value acquisition methods of the above embodiments.
It should be understood that the invention is not limited to the particular arrangements and instrumentality described above and shown in the drawings. For the sake of brevity, a detailed description of known methods is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present invention are not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between steps, after appreciating the spirit of the present invention.
The functional blocks shown in the above-described structural block diagrams may be implemented in hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, a plug-in, a function card, or the like. When implemented in software, the elements of the invention are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine readable medium or transmitted over transmission media or communication links by a data signal carried in a carrier wave. A "machine-readable medium" may include any medium that can store or transfer information. Examples of machine-readable media include electronic circuitry, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio Frequency (RF) links, and the like. The code segments may be downloaded via computer networks such as the internet, intranets, etc.
It should also be noted that the exemplary embodiments mentioned in this disclosure describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, or may be performed in a different order from the order in the embodiments, or several steps may be performed simultaneously.
In the foregoing, only the specific embodiments of the present invention are described, and it will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the systems, modules and units described above may refer to the corresponding processes in the foregoing method embodiments, which are not repeated herein. It should be understood that the scope of the present invention is not limited thereto, and any equivalent modifications or substitutions can be easily made by those skilled in the art within the technical scope of the present invention, and they should be included in the scope of the present invention.
Claims (10)
1. A print start position offset value acquisition method, characterized by comprising:
acquiring a first printing initial position calibration chart, wherein the first printing initial position calibration chart comprises at least one first reference part and a first calibration part; the first reference part comprises a first preset scale pattern; the first calibration part comprises a first preset graph;
controlling an inkjet trolley to print a first reference part in a first printing initial position calibration chart from a reference printing initial position along a printing direction at a first printing speed to obtain a second reference part in a second printing initial position calibration chart;
controlling the inkjet trolley to print a first calibration part in the first printing initial position calibration chart from the reference printing initial position along the printing direction at a second printing speed to obtain a second calibration part in a second printing initial position calibration chart;
and acquiring a second printing initial position offset value corresponding to the second printing speed according to the second reference part and the second calibration part.
2. The method according to claim 1, wherein the scale of the first preset scale map is in units of pixels, and a scale number is marked above or below the first preset scale map, wherein a 0 scale line is located at a middle position of the first preset scale map.
3. The method according to claim 2, wherein the first preset pattern is any one of a triangle, a diamond, and a star; the first preset graph is located right below the scale mark of the first preset scale graph 0.
4. The method of claim 3, wherein a line segment perpendicular to the printing direction is disposed at a position above the center of the first predetermined pattern.
5. The print start position offset value acquisition method according to claim 3, wherein the acquiring the second print start position offset value corresponding to the second print speed from the second reference section and the second calibration section includes:
acquiring a second preset graduated scale of the second reference part;
acquiring a second preset graph in the second calibration part;
acquiring a scale value of the second preset graph under the second preset scale graph;
and acquiring the second printing initial position offset value according to the scale value.
6. The print start position offset value acquisition method according to claim 3, wherein the acquiring the second print start position offset value corresponding to the second print speed from the second reference section and the second calibration section includes:
the image acquisition device is controlled to acquire the second printing initial position calibration chart to obtain a third printing initial position calibration chart, wherein the third printing initial position calibration chart comprises a third reference part and a third calibration part;
identifying a third preset scale pattern of the third reference portion and a third preset pattern of the third calibration portion;
acquiring a scale value of the third preset graph under the third preset scale graph;
and acquiring the second printing initial position offset value according to the scale value.
7. A print start position calibration method, the method comprising:
acquiring a second printing start position offset value according to any one of claims 1 to 6;
acquiring a reference printing initial position corresponding to the first printing speed;
acquiring a second printing initial position corresponding to the second printing speed according to the reference printing initial position and the second printing initial position offset value;
and when the inkjet trolley prints at a second printing speed along the printing direction, controlling the inkjet trolley to start ink-out printing at the second printing starting position.
8. A print start position offset value acquisition apparatus, characterized by comprising:
the first printing initial position calibration chart acquisition module is used for acquiring a first printing initial position calibration chart, wherein the first printing initial position calibration chart comprises at least one first reference part and a first calibration part; the first reference part comprises a first preset scale pattern; the first calibration part comprises a first preset graph;
the first printing module is used for controlling the inkjet trolley to print a first reference part in the first printing initial position calibration chart from a reference printing initial position along the printing direction at a first printing speed to obtain a second reference part in the second printing initial position calibration chart;
the second printing module is used for controlling the inkjet trolley to print the first calibration part in the first printing initial position calibration chart from the reference printing initial position along the printing direction at a second printing speed to obtain a second calibration part in a second printing initial position calibration chart;
and the first offset value acquisition module is used for acquiring a second printing initial position offset value corresponding to the second printing speed according to the second reference part and the second calibration part.
9. A print start position calibration apparatus, the apparatus comprising:
a second offset value acquisition module configured to acquire a second printing start position offset value according to any one of claims 1 to 6;
the reference printing initial position acquisition module is used for acquiring a reference printing initial position corresponding to the first printing speed;
a second printing start position obtaining module, configured to obtain a second printing start position corresponding to the second printing speed according to the reference printing start position and the second printing start position offset value;
and the third printing module is used for controlling the inkjet trolley to start ink-out printing at the second printing starting position when the inkjet trolley prints at the second printing speed along the printing direction.
10. A printing apparatus, comprising: at least one processor, at least one memory, and computer program instructions stored in the memory, which when executed by the processor, implement the method of any one of claims 1-7.
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| CN202210809221.8A CN117416133A (en) | 2022-07-11 | 2022-07-11 | Printing initial position offset value acquisition method, calibration method, device and equipment thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210809221.8A CN117416133A (en) | 2022-07-11 | 2022-07-11 | Printing initial position offset value acquisition method, calibration method, device and equipment thereof |
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