CN105538911B - For the method and apparatus of the alignment of the printhead in print system - Google Patents
For the method and apparatus of the alignment of the printhead in print system Download PDFInfo
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- CN105538911B CN105538911B CN201510688199.6A CN201510688199A CN105538911B CN 105538911 B CN105538911 B CN 105538911B CN 201510688199 A CN201510688199 A CN 201510688199A CN 105538911 B CN105538911 B CN 105538911B
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Classifications
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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
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/36—Blanking or long feeds; Feeding to a particular line, e.g. by rotation of platen or feed roller
- B41J11/42—Controlling printing material conveyance for accurate alignment of the printing material with the printhead; Print registering
- B41J11/46—Controlling printing material conveyance for accurate alignment of the printing material with the printhead; Print registering by marks or formations on the paper being fed
-
- 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
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/0095—Detecting means for copy material, e.g. for detecting or sensing presence of copy material or its leading or trailing end
-
- 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
- B41J2/135—Nozzles
- B41J2/145—Arrangement thereof
- B41J2/155—Arrangement thereof for line printing
-
- 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
- B41J2/21—Ink jet for multi-colour printing
- B41J2/2132—Print quality control characterised by dot disposition, e.g. for reducing white stripes or banding
- B41J2/2146—Print quality control characterised by dot disposition, e.g. for reducing white stripes or banding for line print heads
-
- 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
- B41J25/00—Actions or mechanisms not otherwise provided for
- B41J25/001—Mechanisms for bodily moving print heads or carriages parallel to the paper surface
-
- 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
- B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
- B41J2202/01—Embodiments of or processes related to ink-jet heads
- B41J2202/19—Assembling head units
-
- 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
- B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
- B41J2202/01—Embodiments of or processes related to ink-jet heads
- B41J2202/21—Line printing
Landscapes
- Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Ink Jet (AREA)
- Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
Abstract
There is provided the system and method for the printhead for being directed at print system.One embodiment is the system for being directed at the printhead of print system.The system includes：First sensor, for detecting each section horizontal level of reel of the upstream printhead relative to the print media for travelling through print system；And second sensor, for detecting horizontal level of the downstream printhead relative to each section of reel.After the downstream printhead is arranged on the upstream printhead on the reel direct of travel.The system also includes controller, and the downstream printhead is directed at each section of reel for the horizontal level of the horizontal level based on the upstream printhead and the downstream printhead.
Description
The application is related to entitled " the ALIGNMENT OF PRINTHEADS IN submitted on July 7th, 2013
The U.S. Patent application 13/933,582 of PRINTING SYSTEMS (alignment of the printhead in print system) ", it is all interior
Appearance is all incorporated herein by reference this.
Technical field
The present invention relates to the alignment of the printhead in print system field, more particularly to conitnuous forms print system.
Background technology
In the presence of a large amount of entities for printing demands usually using type of production printer (production printer).It is raw
Product type printer is a kind of high-speed printer for bulk print (for example, louver per minute or more).Type of production is printed
Machine is included in the conitnuous forms printer printed on the print media reel stored with huge roll form.
Type of production printer generally includes the print control unit and print engine of localization (sometimes referred to as " imaging engine "
Or " imaging engine "), wherein the print control unit for localizing is used to control the integrated operation of print system.Print engine includes one
Individual or multiple printhead set groups, wherein each set group include print head controller and printhead (or print head array).It is single
Printhead includes multiple (for example, hundreds of) tiny nozzle for operationally discharging ink controlled by print head controller.
Print head array is formed by the continuous multiple printheads being spaced on the width of print media reel.
When being printed, reel rapidly passes through from nozzle lower section, and these nozzles discharge ink so as in volume off and on
Pixel is formed on cylinder.In order to ensure reel is as one man positioned below nozzle, guidance system can be relative to the traveling of reel
Direction is flatly directed at the reel.Adjustable guidance system when printer is installed first.Even if however, in reel by surface
During alignment, the fluctuation in the physical attribute of reel itself is (for example, along the minor variations at reel edge, the level along reel
Orientation of fiber etc. in tension variation, reel) reel can be caused to undergo horizontal-shift in print procedure.Even if single skew
Very little (for example, being in micron grade), such skew can still reduce print quality.For example, when printer is printed using multiple
Head is formed during mixed colors pixel, and the minor swing of roll position can cause the upstream printhead can be marked on reel correctly
Physical location, and downstream printhead can mark the physical location for making mistake on reel.This can cause pixel in print out task
Final color distortion.
The content of the invention
Embodiment as described herein be used for determine horizontal level of the upstream printhead relative to print media reel, and
One or more downstream printheads are aligned with the horizontal level of upstream printhead.These system and method are also dynamically
One or more downstream printheads are directed at, to tackle the horizontal level of the upstream printhead appeared in print out task process
In fluctuation.
The system that one embodiment is related to the printhead for being directed at conitnuous forms print system.The system includes：First
Sensor, each section for detecting the print media reel that upstream printhead is advanced with respect to print system of horizontal position
Put；And second sensor, for detecting horizontal level of the downstream printhead relative to each section of reel.In the reel row
Enter the downstream printhead on direction to be arranged on after the upstream printhead.The system also includes controller, for being based on
The horizontal level of the horizontal level of the upstream printhead and the downstream printhead is by the downstream printhead and the volume
Each section of cylinder is aligned.
Other exemplary embodiments are described below (for example, the method related to previous embodiment and computer-readable
Medium).
Brief description of the drawings
With reference now to appended accompanying drawing, some embodiments of the present invention are only described by example.In all of the figs, phase
Same reference represents the part of same parts or same type.
Fig. 1 shows exemplary conitnuous forms print system.
How print media reel there is horizontal hunting in the print system that Fig. 2 shows in print procedure shown in Fig. 1.
Fig. 3 shows the example caused by horizontal reel swings in using the print system of multiple Color planes
The schematic diagram of sex chromosome mosaicism.
Fig. 4 shows the schematic diagram of the print system for being used for align printhead in the exemplary embodiment.
Fig. 5 shows the schematic diagram of print system in the exemplary embodiment shown in Fig. 4 of align printhead.
Fig. 6 shows the flow chart of the method for the horizontal-shift of reply print media reel in the exemplary embodiment.
Fig. 7 is to further illustrate beating for many printer print systems of dynamic alignment printhead in the exemplary embodiment
The schematic diagram of print machine.
Fig. 8 shows that being operable to carry out the computer-readable medium comprising programming instruction in the exemplary embodiment comes real
The processing system of existing desired function.
Specific embodiment
The drawings and specific embodiments part depicts specific illustrative embodiment of the invention.It is understood that this
Art personnel can design the various embodiments for being included within the scope of the present invention and embodying spirit of the present invention, although this
A little embodiments are not described clearly or are shown herein.Additionally, the example described here is intended to help understands the present invention
Spirit, be not used to be construed to limit the invention to the example and condition of specific record.As a result, the present invention does not have
Specific embodiments described below or example are restricted to, but should be limited by claim and its equivalents.
Fig. 1 shows exemplary conitnuous forms print system 100.Print system 100 includes type of production printer 110,
Can be applied to ink on conitnuous forms print media (for example, paper) reel 120 by it.As used herein, term " ink
Water " refers to any imaging liquid (for example, watery ink, the coating based on black oil etc.).Printer 110 may include that coloured silk can be applied
Chromatic ink, such as cyan (C), magenta (M), yellow (Y) and positioning registering (K) black ink.One or more rollers 130 are used for
As reel 120 is advanced in print system 100 and position and the reel 120 is driven in extravagance.
How print media reel occurs in the exemplary printing system 100 that Fig. 2 shows in print procedure shown in Fig. 1
Horizontal-shift.For example, the part 210 in Fig. 2 shows that roller applies horizontal-shift to print media reel.As used herein
, horizontal-shift refer in reel plane and with the orthogonal direction of reel direct of travel on (in other words, with the length of reel
Degree direction is orthogonal and width of with reel is parallel) change in location.
As shown in part 210, before reel is advanced by roller, the horizontal level of the center line of reel is in the ginseng of dotted line
Examine the lower section of line.After reel is advanced by roller, centerline is in the top of reference line.Additionally, by print system 100 itself
Caused horizontal-shift degree can swing with the operation of print system 100 in amplitude and direction.In brief,
Driving the such action of reel can cause reel horizontal hunting in the longitudinal direction.Static state adjustment can not be compensated in print procedure
These horizontal-shifts for swinging for occurring.
Part 220 in Fig. 2 shows that reel itself can cause horizontal hunting.Part 220 shows that reel has injustice
Whole edge.For example, some print media reels are initially cut by cutter forming.When cutting over long distances is made, knife
Tool itself can in the longitudinal direction with very small amount (for example, several microns) and with CF horizontal hunting.This transfers to volume
Cylinder is applied with the edge of out-of-flatness.Because many printheads maintain identical absolute position, therefore printing mark in print procedure
Note will be with the change at the edge of paper itself relative to the distance of paper edge and change.
Fig. 3 shows the example caused by horizontal reel swings in using the print system of multiple Color planes
The schematic diagram of sex chromosome mosaicism, plurality of Color plane is physically separated from each other setting.In this case, each print head array
Row 310 as cyan, magenta, yellow and positioning registering black in a kind of color Color plane.In figure 3, each is beaten
Print head array 310 is aligned to identical true horizontal position both relative to other print head arrays, just by the He of reference line 320
Represented by 330.When printhead is aligned by this way, these printheads will all mark phase relative to each other
Same true horizontal position.However, because the position of reel 120 swings between printhead, therefore by each print head array
The ink of 310 imagings will be appeared on the varying level position of reel 120, as shown in key element 340.Therefore, even if each is beaten
Print first 310 all images identical true horizontal position, and color plane separation still occurs.This problem is outstanding due to following
It is not intended to occurs：The color of single pixel is typically the imaging applied by the print head array in diverse location on the page
Defined in the multiple color of liquid.Therefore, if Color plane can not be aligned relative to another Color plane on reel,
Then the color of single pixel may be inaccurate, and this causes print quality to go out to be now able to the variation being felt.
In order to solve these problems in terms of print head alignment, Fig. 4 is shown in the exemplary embodiment for letting drive at
Print the print system 400 of head.Print system 400 includes any system, the part that can be operated to image print media reel
Or equipment.Print system 400 has been modified to adjust the horizontal level of printhead 430.These adjustment are in order to by printhead
430 are aligned and are made with the horizontal level of the printhead 420 on reel 480.If for example, printhead 420 is relative
In one section of reel 480 is marked on the horizontal level of reel 480, then controller 450 can align printhead 430 to be arrived in the section
Same section of reel 480 is marked when at up to printhead 430 at same level position.As used herein, due to one
Reel in Duan Hangjin will be first reached at printhead 420 before it reaches printhead 430, therefore printhead 420 is considered as
" upstream " of printhead 430 is in, and printhead 430 is considered as being in " downstream " of printhead 420.In addition, as made here
, " one section " but reel refer to extend across reel width on the direct of travel of reel have limited distance
Part reel.For example, one section of reel may include single row of pixels, multiple printer pages on single page, the page etc..
In this embodiment, print system 400 includes printer 410, and it is using printhead 420 and 430 come in reel
Marking ink on 480.Print system 400 also includes print head alignment system 460 (as shown in dotted line), the print head alignment system
460 are made up of the alignment system 434 of controller 450, sensor 422 and 432 and printhead 430.Sensor 422 is used for
Horizontal level of the printhead 420 relative to reel 480 is detected, and sensor 432 is used to detect printhead 430 relative to reel
480 horizontal level.Then (for example, in print procedure) adjusts the horizontal level of printhead 430 to compensate to controller 450
The position of change of the printhead 420 on reel 480.Due to reel 480 and for position reel 480 roller natural trend and
Dynamic change, therefore the horizontal level of printhead 420 is even maintained at the fixed position of printer 410 in printhead 420
Embodiment in still can relative to reel 480 occur change.
Sensor 422 and 432 includes that operationally detection printhead is relative to any system that the position of reel 480 offsets
System, part or equipment.For example, sensor may include laser class, air-driven type, photoelectric type, ultrasonic type, infrared type, optics
The sensing apparatus of type or other any suitable types.Additionally, each sensor will be placed on the upstream of its correspondence printhead
Position (for example, being less than one foot in the upstream direction) place.In this embodiment, each sensor is used to detect the thing of reel
Manage the position at edge.In another embodiment, sensor is placed on the downstream position of their correspondence printheads, so as to
The position of the mark that detection is made by printhead on reel.These measures are subsequently used to as each section of reel 480 is in printing
Advance to determine each printhead relative to each section of horizontal level of reel 480 between head.
Controller 450 is included based on horizontal position of the printhead 420 relative to reel 480 detected by sensor 422
That puts changes to control any system, part or the equipment of the position of printhead 430.For example, the bootable positioning of controller 450
Equipment 434 (for example, linear actuator) physically moves printhead 430 to tackle the change of the horizontal level of printhead 420.
Controller 450 is for example implemented as custom circuit, the processor for performing programming instruction etc..Controller 450 can be integrated into printing
In machine 410 or if desired can be separately positioned with printer 410.Location equipment 434 may include linear actuator, can pass through
Itself is driven along trapped orbit to reposition the movable print heads set group of itself or printhead 430 can be moved
Other any suitable systems.
As shown in figure 4, can be inclined relative to their precalculated positions on reel 430 by the mark 440 that printhead 420 is made
From a certain amount of Δ 1.Meanwhile, printhead 430 can deviate not same amount Δ 2, and this tittle will be due to the swing of reel 480 with beating
The continuation of print and constantly change.Therefore, the difference of the horizontal level between printhead 420 and printhead 430 will be continuous
Change.
Fig. 5 shows another signal of print system 400 in the exemplary embodiment shown in Fig. 4 of align printhead
Figure 50 0.Specifically, Fig. 5 shows mobile printhead 430 so as to by the horizontal level of printhead 420 and one section of 480 pairs, reel
It is accurate/to match.As shown in figure 5, printhead 430 has been moved, during so that proper printhead 420 marking this section of reel 480,
Same place occupied by the center line of printhead 420 is directed at its center line (being identified by dotted line) on the page.
The exemplary details of the operation of print system 400 will be described with reference to Figure 6.For this embodiment, it is assumed that beat
Print machine 410 has begun to printing, and in print procedure, reel 480 is driven below printhead 420 and 430.In addition,
Assuming that because the horizontal level of the powered reason printhead 420 of reel is shifted by the longitudinal direction relative to reel 480.
Fig. 6 shows reply print media reel in the exemplary embodiment and the method 600 of horizontal-shift occurs.With reference to
The print system 400 of Fig. 4 describes each step of method 600, but it will be understood to those of skill in the art that be to be at other
Also executing method 600 in system.Each step of flow chart as described herein is not all of step, may also include it is unshowned its
His step.Each step as described herein can also replace sequentially executed.
In this embodiment, sensor 422 and 432 continuously measures printhead 420 and 430 relative to reel 480
Horizontal level.Specifically, the distance at edge to reel 480 of the measurement of sensor 422 at printhead 420, and sense
The distance at edge to reel 480 of the measurement of device 432 at printhead 430.In step 602, the operation of controller 450 sensing
Device 422 detects each section horizontal level of reel 480 of the printhead 420 with respect to printhead 420.Similar, in step 604
In, the operation sensor 432 of controller 450 detects each section level of reel 480 of the printhead 430 with respect to printhead 430
Position.Sensing data is relative to determine printhead 420 (such as representing marginal position) for the further treatment of controller 450
In the horizontal level at one section of reel 480 of reel 480.Determine that printhead 420 can be wrapped relative to the horizontal level of reel 480
Input of the analysis from sensor 422 is included to determine printhead 420 compared with the default level position relative to reel 480
Ideal (such as positioned at center) mark position in side-play amount (Δ 1), such as reel 480.
In step 606, controller 450 is based on the horizontal level of printhead 420 and the horizontal level of printhead 430, will
Printhead 430 is aligned with each section of reel.Therefore, for the reel section for giving, to this section of reel reaches printhead 430, control
Printhead 430 can be registered to device processed 450 horizontal level of the printhead 420 for this section.In one embodiment, at this
Reason process includes obtaining the range measurement from sensor 432 to determine printing before this section of reel reaches printhead 430
First 430 skew (Δ 2).Controller 450 determine by printhead 430 from its current horizontal location move to by printhead 430 with
The adjustment amount of this section of reel alignment, and indicate location equipment 434 when this section of reel reaches printhead 430 and adjust printhead
430 horizontal level.By this way, controller 450 answers right each section for reel 480 in printhead 420 and printhead
The difference between relative horizontal position between 430.Therefore, if controller 450 determines printhead 420 relative to one section of volume
Cylinder offsets 50 microns in one direction, and it guides location equipment 434 to move printhead 430 afterwards, to work as section volume
When cylinder 480 reaches printhead 430, it will in this direction be offset 50 microns relative to reel 480.
Controller 450 can also be based on speed and/or distance measure come its adjustment of timing, such as sensor 422 and printing
First the distance between 430, between the distance between sensor 432 and printhead 430 and printhead 420 and printhead 430
Distance etc..When the speed of known reel 480, the time delay between the part of printer 410 can be determined that to be ensured to beat
The adjustment of print first 430 is by timing exactly.For example, if sensor 422 is positioned in the upstream one and half of printhead 430,
Controller 450 can apply time delay ensure printhead 430 be moved to after one and half it new position (for example,
Apply input delay by the actuator for driving printhead 430).
Method 600 provides the improvement substantial for prior art, because it answers right reel 480 in printhead
Skew between 420 and printhead 430.Specifically, the abswolute level of the printhead 420 and 430 not being to determine in printer 410
Position, method 600 determines horizontal level of the printhead 420 and 430 relative to reel 480 (it is unpredictably swinging).This
Realize printhead 430 be repositioned onto exactly on reel 480 with the identical relative horizontal position of printhead 420, this
Ensure that two printheads carry out being aligned in the same manner relative to reel in print procedure at them.In these technical spirits
The problem caused by inclined Color plane is eliminated, because these technologies can be used to ensure the mark when various colors
Note material is discharged on reel so that when pixel position creates mixed color, these marker materials can be aligned.
Method 600 can in print procedure by cyclically/continuously repeat, with cause printhead 420 relative to reel
480 horizontal-shift can constantly be recognized and solved.This enables that print system 400 dynamically tackles reel in printing
During move horizontally, or even when reel move horizontally be unpredictable when.More preferably positioning of the printhead relative to reel
More preferable print quality is able to ensure that, and in using the system of the ink of multiple color, it is also assisted in ensures to print color
Coloured silk accurately can be marked on print media.
In another embodiment, controller 450 can receive for represent horizontal level stream from the defeated of each sensor
Enter, can be before correction roll position skew be attempted to one or more inlet flow application low pass filters.Low pass filter (example
Such as, in the range of 5Hz) can be repositioned in controller 450/align printhead 430 when help prevent controller 450 respond high frequency make an uproar
Sound.
In another embodiment, controller 420 can recognize the acceleration of printhead 430 when printhead 430 is relocated
Degree limitation.Controller 420 is then prevented from limitation of the printhead 430 beyond this definition.If printhead 430 adds when it is moved
Speed is too fast, then the original kinetic energy of printhead 430 can cause printhead 430 to exceed its desired final position.When printhead 430 surpasses
When crossing its target location, this can cause the Wrong localization of printhead 430 again.
In another embodiment, controller 450 can recognize the speed of printhead 430 when printhead 430 is relocated
Limitation.Controller 450 is then prevented from rate limitation of the printhead 430 beyond this definition.This is by many for wherein printhead 430
Row nozzle composition embodiment be favourable, on the direction that wherein each nozzle is advanced equivalent to reel positioned at mutual upstream/
Downstream position.After printing, the ink from each row nozzle should be evenly distributed over.If however, whole printhead
Sleeve is streaked by movement too quickly in the horizontal direction, then often row printhead may print to the positions different from desired position
Put place.In brief, printhead is printed when the excessive velocities of printhead and when printhead is just relocated, then
The horizontal levels different from desired position are marked on reel per guild.The rate limitation of printhead solves such asking
Topic.
In another embodiment, exist in print system and be referred to as the mechanical slippage amount of " clearance (backlash) ".Work as finger
Show actuator/motor drive printhead move one section specifically apart from when, clearance introduces absolute position error.Such effect
Fruit can be exaggerated when actuator/motor is instructed to change the direction of motion of printhead.For example, if it is indicated that linear perform
Device drives the printhead for moving upper mobile 35 microns round about, then mechanical deviation/problem on deformation, slippage is asked
Topic and gap difference can cause printhead only in the desired direction by mobile 20 microns.
Controller 450 is based on driving instruction (for example, " mobile 35 microns of printhead ") and the actual motion of printhead
Between known correlation compensate clearance.Clearance occurs for example, can be predicted using following equation, based on to measurement
Data find party's formula using regression technique for printer.In another example, clearance amount can be measured individually, be deposited
Storage in memory, and is compensated.Clearance amount can be stored in multiple tables, and one of table description becomes when no on direction
There is clearance during change, and there is clearance when there is change on direction in the description of another table.Clearance table may include that such as one is
The list item of row, each list item represents the relation between the actual range that driving instruction and printhead are advanced.By using these tables,
Controller 450 can determine for guiding the input of linear actuator/motor movement printhead certain distance and downstream to print
Difference between the actual movement of head.Controller 450 is then able to adjust the input for linear actuator based on the difference.
In another embodiment, controller 450 recognizes the resonant frequency of print system 400.The resonance of print system 400 is frequently
Rate is the motion frequency on amplifying the abiogenous vibration in the inside of print system 400 in print procedure.Print system 400
Resonant vibration can cause the damage for its part.This resonant frequency is to be based on print system 400 in printing operation process
Actual measurement determine, or predetermined value.
Controller 450 determine print system 400 resonant frequency (for example, in by reference to memory store value) it
Afterwards, controller 450 takes steps to prevent from increasing resonant vibration when it moves forward and backward one or more printheads.For this
Individual purpose, controller 450 can apply bandstop filter to the input from sensor 430, to prevent to measure (and therefore taste
Examination correction) vibration that occurs at the resonant frequency fx of print system 400.This is desired, and reel is corrected at the resonant frequency fx
Motion can increase the vibration of print system 400 and cause the damage of print system 400 in some cases.However, at some
In embodiment, can not also apply bandstop filter, it means that the correction of the vibration under the natural frequency of print system can be applied.
In another embodiment, can the horizontal level of upstream printhead based on determined by it is (every to be directed at multiple printheads
Individual printhead all has sensor).This even includes the entirely different printer in being printed on identical reel
In printhead.Each downstream printhead is for example based on most upstream in upstream printhead, print system nearest in print system
Printing the first-class horizontal level to adjust downstream printhead.In another embodiment, each printhead of print system is whole
A part for individual Color plane, and each Color plane is in the upstream/downstream of other Color planes.
In another embodiment, each printhead can make one or more grooved marks so that other printheads are referred to,
These grooved marks are arranged at the known level position relative to the printhead.Can detect what these were marked by sensor
Position, to determine the horizontal level of upstream printer.Optionally, autonomous system can apply grooved mark, and such as bore hole can not
The infrared or thermal sensation grooved mark seen.
Example
In following example, printing system of the printhead relative to the position of print media reel is adjusted in print procedure
Under the scene of system, extra processing procedure, system and method are described.
Fig. 7 shows the block diagram of the another exemplary print system of the horizontal-shift for considering print media reel 780
700.In this embodiment, print system includes two ink-jet printers for printing to coming for task.Each printer
It is used as marking different colours on print media reel 780 including two print head arrays, and each print head array
The Color plane of ink.Upstream printer 710 marks black (K) and magenta (M) ink on reel 780, and downstream prints
Machine (not shown) marks cyan (C) and yellow (Y) ink on reel 780.
When task is printed, reel 780 is advanced through print system with the speed of eight lineal foot per second, and even
The horizontal level of reel 780 also can Pitching between single Color plane.Print system alignment C, M and Y Color plane is come
The horizontal level that matching is detected for the K Color planes of reel 780.Specifically, movement C, M and Y Color plane of controller 750
To compensate the horizontal position error between about five microns to hundreds of microns, the horizontal position error is with about 0.1 to 2
Hertz (Hz) speed occurs.In order to calibrate the correction made by each print head array, beam sensor 722 is passed through by laser
Detect the horizontal position of farthest upstream print head array 720 (here, the print head array is responsible for black (K) Color plane)
Put.Print head array 720 is fixed in the middle of printer 710, but because reel 780 is moved horizontally in print procedure, because
This print head array 720 is changed over time relative to the horizontal level at the edge of reel 780.
Sensor 722 and 732 continuously measures horizontal level of the printhead 720 and 730 relative to reel 780.At this
In embodiment, the distance at the edge of the measurement of sensor 722 and reel 780.The distance that so measurement is obtained is equal to d1+d2.Such as this
In used, d1 corresponds to when print head array 720 relative to reel 780 by accurately horizontal location up to reel 780
The desired distance at edge.Meanwhile, d2 correspond to represent print head array 720 corresponding thereto in reel 780 desired locations water
The deviant of flat departure.When print head array 720 is fixed or when print head array 720 is exhausted relative to sensor 722
When otherwise known to position, d1 is changed into given value, it means that d2 can also be determined.
Sensor 732 also measures the distance with the edge of reel 780.The distance that so measurement is obtained is equal to d3+d4.Such as this
In used, d3 corresponds to the current absolute location based on the print head array 730 in printer 410 and is accurately aligned
Reel 780 edge desired distance.Meanwhile, d4 corresponds to expression print head array 730 for the horizontal departure amount of d3
Deviant.When print head array 730 relative to sensor 732 absolute position known to when, d3 is changed into given value, it means that d4
Also can be determined.
Controller 750 also receives the input for representing the gait of march of reel 780.The input for example comes from printer 710, or
From the encoder device for physically with printer 710 separate.Based on the print head array in print system and various sensors
Between known distance and speed, controller 750 determine one section of reel from sensor 722 advance to print head array 720 when
Between T1, one section of reel advance to the time T2 and one section of reel of sensor 732 from the row of sensor 732 from print head array 720
Enter the time T3 of print head array 730.Based on such information and the skew being calculated as described above, controller
750 implement " time delay " adjustment for print head array 730, to ensure the skew of print head array 730 and to be directed to given
The skew of the print head array 720 of the reel of section matches.
Specifically, as the value d2 at controller 750 calculates sensor 722, controller 750 determines measured section of volume
Cylinder reaches the time (T1+T2+T3) spent needed for printhead 730.This is that printhead 730 should be aligned to detected by matching
Skew needed for time.After elapsed time T1+T2, the section has arrived at sensor 732, and as described above by controlling
Device 750 determines the current offset d4 of print head array 730.Then, during time period T3, controller 750 is guided linearly to be held
Row device (it includes rotating shaft 734 and motor 736) with drive print head array 730 move a segment distance (d4-d2), so as to will beat
Print head array 730 is aligned to the skew found in print head array 720.That is, print head array 730 is in horizontal level
On be shifted by an amount Δ 1+ Δ 2, to match the skew of print head array 720.Each in the printer (not shown) of downstream
With print head array 720 be aligned for themselves in the horizontal direction using similar system by Color plane.
Embodiments disclosed herein can be in the form of software, hardware, firmware or their various combinations.One
In individual specific embodiment, software performs various operations disclosed herein for guiding the processing system of controller 420.Fig. 8
Show for being operable to carry out the computer-readable medium comprising programming instruction to perform the expectation in exemplary embodiment
The processing system 800 of function.Processing system 800 is tangibly embodied as the programming of computer-readable recording medium 812 by performing
Instruct to perform aforesaid operations.In terms of this, inventive embodiment is employed and is able to access that via computer-readable medium 812
Computer program form, wherein the computer-readable medium 812 provide by computer or other it is any instruction perform system
The used program code of system.For the purpose of the present invention, computer-readable recording medium 812 can be included or store by counting
Any medium of the program that calculation machine is used.
Computer-readable recording medium 812 can be electronics, magnetic, optics, electromagnetism, infrared or semiconductor equipment.Computer
The example of readable storage medium storing program for executing 812 includes solid-state memory, tape, removable computer disk, random access storage device
(RAM), read-only storage (ROM), rigid disks and CD.The present example of CD includes compact disk-read-only storage
(CD-ROM), compact disk-read/write (CD-R/W) and DVD.
Processing system 800 is suitable to storage and/or configuration processor code and including via system bus 850 and program sum
According at least one processor 802 that memory 804 is coupled.Program and data storage 804 are included in actual configuration processor code
Local storage, massage storage and flash memories employed in process, the flash memories provide at least some journeys
The interim storage of sequence code and/or data, code and/or data are extracted to reduce from massage storage in the process of implementation
Number of times.
Input/output or I/O equipment 806 (including but not limited to keyboard, display, pointing device etc.) or direct coupling
Connect or coupled by middle I/O controllers.Network adapter interface 808 can also be with the system integration with so that processing system
800 are mutually coupled by middle private or public network with other data handling systems or storage device.Modem, cable
Modem, the attachment of IBM passages, SCSI, optical-fibre channel and Ethernet card are working as network or host interface adapter
Preceding utilizable some types.Display device interfaces 810 can be with the system integration to be connect with one or more display devices
Mouthful, the such as screen of the presentation of data and print system for being generated by processor 802.
Although being described specific embodiment, the scope of the present invention is not limited to these specific implementations
Example.The scope of the present invention is limited by appended claim and its equivalents.
Claims (15)
1. a kind of device, including：
For the print head alignment system of conitnuous forms print system, the print head alignment system includes：
First sensor, for detecting upstream printhead relative to each section of reel of the print media for travelling through print system
Horizontal level；
Second sensor, for detecting horizontal level of the downstream printhead relative to each section of reel, wherein in the reel
The downstream printhead is arranged on after the upstream printhead on direct of travel；And
Controller, for the horizontal level based on the upstream printhead and the downstream printhead horizontal level come will be described
Downstream printhead is aligned with each section of reel.
2. device according to claim 1, wherein：
The controller is used to determine when the upstream printhead, relative to one section of horizontal level of reel, determines this section of reel
The downstream printhead will be entered from the upstream print head row, and will when this section of reel reaches the downstream printhead
The downstream printhead is aligned with horizontal level.
3. device according to claim 1, wherein：
The controller be used for represent by the first sensor detect it is horizontal level stream, from described first sensing
The input of device applies low pass filter, and is directed at the downstream printhead based on filtered horizontal level stream.
4. device according to claim 1, wherein：
The controller be used for based on the distance between the upstream printhead and the downstream printhead come recognize will be described under
The time point that trip printhead is aligned with one section of reel.
5. device according to claim 1, wherein：
The controller be used for the speed based on reel come recognize by the downstream printhead be aligned with one section of reel when
Between point.
6. device according to claim 1, wherein：
The controller is used to be moved to the upstream printhead relative to one section of water of reel by by the downstream printhead
Prosposition is put, and the downstream printhead is aligned with this section of reel.
7. device according to claim 1, wherein：
The controller is used to be limited while the downstream printhead is directed at the speed of the downstream printhead.
8. device according to claim 1, wherein：
The controller is used to be limited while the downstream printhead is directed at the acceleration of the downstream printhead.
9. device according to claim 1, wherein：
The first sensor is used for described to detect based on the mark by upstream printhead applying on the reel
Swim the horizontal level of printhead.
10. device according to claim 1, wherein：
Linear actuator is based on the input from the controller and repositions the downstream printhead；And
The controller be used to determining guide the linear actuator move the segment distance of downstream printhead one input and
Difference between the actual motion of the downstream printhead, and adjusted from the defeated of the controller based on the difference
Enter.
A kind of 11. methods, including：
Each section horizontal position of reel of the detection upstream printhead relative to the print media for travelling through conitnuous forms print system
Put, wherein setting downstream printhead after the upstream printhead on reel direct of travel；
Horizontal level of the detection downstream printhead relative to each section of reel；And
The horizontal level of horizontal level and the downstream printhead based on the upstream printhead is come by the downstream printhead
It is aligned with each section of reel.
12. methods according to claim 11, also include：
Determine the upstream printhead relative to one section of horizontal level of reel；
Determine when this section of reel will enter the downstream printhead from the upstream print head row；And
The downstream printhead is aligned with horizontal level when this section of reel reaches the downstream printhead.
13. methods according to claim 11, also include：
Input to the horizontal level stream of the upstream printhead detected by expression applies low pass filter；And
The downstream printhead is directed at based on filtered horizontal level stream.
14. methods according to claim 11, also include：
Recognized the downstream printhead and one section based on the distance between the upstream printhead and the downstream printhead
The time point that reel is aligned.
15. methods according to claim 11, also include：
Speed based on reel recognizes the time point that the downstream printhead is directed at one section of reel.
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| US14/522,455 | 2014-10-23 | ||
| US14/522,455 US9186885B2 (en) | 2013-07-02 | 2014-10-23 | Alignment of printheads in printing systems |
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| JP6740706B2 (en) * | 2016-05-20 | 2020-08-19 | 株式会社リコー | Image forming apparatus and head position adjusting method |
| JP2018002341A (en) * | 2016-06-28 | 2018-01-11 | 三菱重工印刷紙工機械株式会社 | Paper joined part detecting device of cardboard sheet, production apparatus of cardboard sheet and cardboard sheet |
| US10334130B2 (en) | 2017-03-15 | 2019-06-25 | Ricoh Company, Ltd. | Image forming apparatus, image forming system, and position adjustment method |
| JP7098979B2 (en) * | 2017-03-21 | 2022-07-12 | 株式会社リコー | How to adjust the position of the transfer device, transfer system and head unit |
| NL2023878B1 (en) * | 2019-09-23 | 2021-05-25 | Ultimaker Bv | A filament path length measuring device |
| CN111367410B (en) * | 2020-02-27 | 2025-03-18 | 珠海奔彩电子股份有限公司 | Printing method, device, storage medium and handheld printer |
| WO2021169712A1 (en) | 2020-02-27 | 2021-09-02 | 珠海奔彩打印科技有限公司 | Handheld printer, printing method, information processing method and printing device |
| JP7570204B2 (en) * | 2020-09-23 | 2024-10-21 | 株式会社Ｓｃｒｅｅｎホールディングス | Printing device |
| GB202216646D0 (en) * | 2022-11-08 | 2022-12-21 | Dover Europe Sarl | Printing apparatus and method of measurement |
| GB202216615D0 (en) * | 2022-11-08 | 2022-12-21 | Dover Europe Sarl | Printing apparatus and method of measurement |
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| US5442388A (en) * | 1992-01-16 | 1995-08-15 | Xerox Corporation | Method and means for correcting lateral registration errors |
| US5272493A (en) * | 1992-04-02 | 1993-12-21 | Xerox Corporation | Method and apparatus for registration of sequential images in a single pass, multi-LED printbar printer |
| EP1238813A1 (en) * | 2001-03-08 | 2002-09-11 | Agfa-Gevaert | An ink jet printer equipped for aligning the printheads |
| US6554398B2 (en) * | 2001-03-08 | 2003-04-29 | Agfa-Gevaert | Ink-jet printer equipped for aligning the printheads |
| JP4451880B2 (en) * | 2003-06-23 | 2010-04-14 | ザ プロクター アンド ギャンブル カンパニー | Manufacturing method for generating highly positioned printed images and embossed patterns on a stretchable substrate |
| JP4075958B2 (en) * | 2004-03-30 | 2008-04-16 | セイコーエプソン株式会社 | Printing device |
| US7309118B2 (en) * | 2004-11-30 | 2007-12-18 | Xerox Corporation | Systems and methods for reducing cross process direction registration errors of a printhead using a linear array sensor |
| JP2006306077A (en) * | 2005-03-30 | 2006-11-09 | Fuji Photo Film Co Ltd | Liquid ejection device and ejection abnormality detection method |
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| JP6665481B2 (en) | 2020-03-13 |
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| CN105538911A (en) | 2016-05-04 |
| EP3020555A1 (en) | 2016-05-18 |
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