CN103358665A - Prepress color register error real-time correction method for electronic shaft color printing system - Google Patents
Prepress color register error real-time correction method for electronic shaft color printing system Download PDFInfo
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Abstract
The invention discloses a prepress color register error real-time correction method for an electronic shaft color printing system. The method comprises the following implementation steps that a color mark sensor is arranged on the feeding side, an electronic shaft returns to zero and a color register color mark target angle Y is computed; printing is started, when the color mark sensor on the feeding side of a color set to be overprinted detects a color mark of an anterior color set on a printing material, the angle X between a color register color mark on a printing plate of the color set to be overprinted and a printing point is obtained, an initial deviation angle Z is computed according to the formula that Z=Y-X, and the printing plate of the color set to be overprinted is rotated by the deviation angle Z; when the color mark sensor detects the color mark of the anterior color set on the printing material, the angle Y0 between the color register color mark on the printing plate of the color set to be overprinted and the printing point is obtained, and a printing plate correction error ERROR is obtained according to the formula that ERROR=Y-Y0 and then is output to an electronic shaft servo motor system in real time. The prepress color register error real-time correction method for the electronic shaft color printing system has the advantages of being accurate in color register, carrying out controlling in real time, saving printing material consumption, and improving printing efficiency.
Description
Technical field
The present invention relates to the packages printing field, be specifically related to chromatography error real-time correction method before a kind of seal of the electronical line shaft colored printing system for the bands such as plastic foil, paper, yarn fabric, metal pool material being carried out colored printing and pattern mold pressing.
Background technology
The chromatic printing machine of prior art can be divided into mechanical axis chromatic printing machine and electronical line shaft chromatic printing machine according to the galley transmission mode, and the whole galleys of mechanical axis chromatic printing machine all are to connect by a motor-driven running by mechanical synchronization; The every galley of the same colour of electronical line shaft chromatic printing machine all is that a servomotor drive is controlled whole galley synchronous operations by motion controller.Along with the servo control System Development, the electronical line shaft chromatic printing machine substitutes the mechanical axis chromatic printing machine just gradually.
For the color control of chromatic printing machine cover, at present domestic and international known colored printing overprinting method is that color mark sensor detects after the printing go forward look colour code and treat that chromatography colour code spacing obtains chromatography error of printing material, according to the overprint error after the printing, the mechanical axis chromatic printing machine then dwindles the back by the floating roller of adjustment correction and wants the trapping printing error again, and the electronical line shaft chromatic printing machine then dwindles the back by adjusting electronical line shaft forme position and wants the trapping printing error again.Although this method also can be dwindled chromatography error, but this method is known chromatography error for printing to become a useful person, therefore it is to be based upon on the basis that produces the accurate spoilage of chromatography not, realizes follow-up printing registration by the chromatography error correction again, causes the waste of printing material.
Summary of the invention
The technical problem to be solved in the present invention provides the front chromatography error real-time correction method of the seal that is used for electronical line shaft colored printing system that a kind of chromatography is accurate, control in real time, can save printing material loss, raising printing efficiency.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of for chromatography error real-time correction method before the seal of electronical line shaft colored printing system, implementation step is as follows:
1) at the feed side for the treatment of the chromatography colour cell color mark sensor is set; After installing each colour cell forme, electronical line shaft returned zero make the chromatography colour code of each colour cell forme be positioned on the seal point position, the driving servomotor of each colour cell forme also all is positioned at zero-bit; Be positioned at the chromatography colour code angle on target Y that the front colour cell colour code for the treatment of chromatography colour cell feed side color mark sensor cursor place carries out chromatography according to forme perimeter L, colour code spacing C, color mark sensor cursor on the chromatography colour code that is used for treating on the chromatography colour cell forme and the printing material to calculating apart from M of seal point, the open interval that each treats chromatography colour cell feed side color mark sensor is obtained in calculating;
2) start printing, when the color mark sensor for the treatment of chromatography colour cell feed side detects front colour cell colour code on the printing material, obtain the angle X that treats between chromatography colour code on the chromatography colour cell forme and the seal point by the electronical line shaft servo electrical machinery system, then calculate initial offset angle Z according to Z=Y-X, and will treat chromatography colour cell forme pivot offset angle Z;
3) when presswork, detect in real time front colour cell colour code on the printing material by the color mark sensor for the treatment of chromatography colour cell feed side, obtain by the electronical line shaft servo electrical machinery system during front colour cell colour code on detecting printing material and treat the angle Y0 between the chromatography colour code and seal point on the chromatography colour cell forme, obtain forme according to ERROR=Y-Y0 simultaneously and correct error E RROR and export in real time the electronical line shaft servo electrical machinery system to and finish each forme for the treatment of the chromatography colour cell and proofread and correct.
As further improvement in the technical proposal of the present invention:
Comprise to the detailed step apart from M calculating chromatography colour code angle on target Y of seal point according to forme perimeter L, colour code spacing C, color mark sensor cursor in the described step 1): by obtain the print direction of electronical line shaft colored printing system by the electronical line shaft servo electrical machinery system, when print direction was forward, ((M/L) * 360-(C/L) * 360+F) obtained each chromatography colour code angle on target Y that treats the chromatography colour cell according to Y=360-; When print direction when being reverse, ((M/L) * 360+ (C/L) * 360+F) obtains each chromatography colour code angle on target Y that treats the chromatography colour cell according to Y=360-; Wherein L is that forme girth, C are that colour code spacing, M are the distance that the color mark sensor cursor arrives the seal point, and F is the system balance angle.
Calculate in the described step 1) and obtain each detailed step for the treatment of the open interval of chromatography colour cell feed side color mark sensor and be: the interval angle Q of detection window that calculates color mark sensor according to Q=(R/L) * 360, calculate the angle of release degree W1 of color mark sensor, close angle W2 according to what W2=Y+Q/2 calculated color mark sensor according to W1=Y-Q/2, according to the angle of release degree W1 of color mark sensor with close the open interval W that angle W2 obtains color mark sensor, wherein R is that the color mark sensor detection window is interval, and Y is chromatography colour code angle on target.
Described according to color mark sensor angle of release degree W1 and close the open interval W that angle W2 obtains color mark sensor and specifically refer to: when the value of the angle of release degree W1 of color mark sensor and the value of closing angle W2 are timing, effective open interval of color mark sensor is W1＜W＜W2, otherwise the color mark sensor valid interval is W1＜W＜360 and 0＜W＜W2.
The present invention has following advantage:
1, the present invention has printed front look colour code correspondence by the color mark sensor detection chromatography forme or mold pressing roll position has been treated in printing, produce overprint error when extrapolating preprinted by the color mark sensor cursor to forme or mold pressing roll marks point distance or during mold pressing, treat in advance cover printing or mold pressing roll position and carry out the position accurate correction, overprint error auto zero when guaranteeing printing or mold pressing, printing or mold pressing chromatography quality have been improved, avoided the waste of printing material, can be applicable to the process printing of various high-velocity electrons axle chromatic printing equipments, it is accurate to have a chromatography, control in real time, can the conserves paper loss, improve the advantage of printing efficiency.
2, the present invention can be suitable for the bands such as plastic foil, paper, yarn fabric, metal pool material is carried out the color control of colored printing cover, has advantage applied widely.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the enforcement theory structure schematic diagram of the embodiment of the invention one.
Fig. 2 is the structural representation when electronical line shaft returns zero in the embodiment of the invention one.
Fig. 3 be in the embodiment of the invention one only electronical line shaft return the forme position view of look colour code when running to the color mark sensor cursor position of going forward of printing material when not carrying out the servomotor skew after zero.
Fig. 4 is that the colour code arrangement mode is sequential schematic on the embodiment of the invention one printing material.
Fig. 5 is that the colour code arrangement mode is the backward schematic diagram on the embodiment of the invention two printing materials.
Marginal data: 1, printing material; 11, front look printing colour code; 12, overprint color colour code; 2, printing material traffic direction; 3, front look printing points; 4, front look colour cell forme; 5, color mark sensor; 6, color mark sensor cursor; 7, treat the overprint color printing points; 8, treat chromatography colour cell forme; 9, treat chromatography colour cell forme colour code position; 10, forme direction of rotation.
The specific embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that protection scope of the present invention are made more explicit defining.
Embodiment one:
The embodiment of the invention is as follows for the implementation step of the front chromatography error real-time correction method of seal of electronical line shaft colored printing system:
1) at the feed side for the treatment of the chromatography colour cell color mark sensor is set; After installing each colour cell forme, electronical line shaft returned zero make the chromatography colour code of each colour cell forme be positioned on the seal point position, the driving servomotor of each colour cell forme also all is positioned at zero-bit; Be positioned at the chromatography colour code angle on target Y that the front colour cell colour code for the treatment of chromatography colour cell feed side color mark sensor cursor place carries out chromatography according to forme perimeter L, colour code spacing C, color mark sensor cursor on the chromatography colour code that is used for treating on the chromatography colour cell forme and the printing material to calculating apart from M of seal point, the open interval that each treats chromatography colour cell feed side color mark sensor is obtained in calculating;
2) start printing, when the color mark sensor for the treatment of chromatography colour cell feed side detects front colour cell colour code on the printing material, obtain the angle X that treats between chromatography colour code on the chromatography colour cell forme and the seal point by the electronical line shaft servo electrical machinery system, then calculate initial offset angle Z according to Z=Y-X, and will treat chromatography colour cell forme pivot offset angle Z;
3) when presswork, detect in real time front colour cell colour code on the printing material by the color mark sensor for the treatment of chromatography colour cell feed side, obtain by the electronical line shaft servo electrical machinery system during front colour cell colour code on detecting printing material and treat the angle Y0 between the chromatography colour code and seal point on the chromatography colour cell forme, obtain forme according to ERROR=Y-Y0 simultaneously and correct error E RROR and export in real time the electronical line shaft servo electrical machinery system to and finish each forme for the treatment of the chromatography colour cell and proofread and correct.
When the look colour code for the treatment of after electronical line shaft returns zero in the present embodiment that the skew of chromatography colour cell servomotor is finished, printing material is gone forward ran to the color mark sensor cursor position, the free from error forme of chromatography position as shown in Figure 1.Printing material go forward the look colour code run to from 5 positions of Fig. 17 position printing material length deduct after the colour code spacing corresponding forme angle equal to treat that chromatography colour cell forme colour code runs to the angle of 7 positions from 9 positions, so just having obtained treating being positioned on chromatography colour code on the chromatography colour cell forme and the printing material expression formula that the front colour cell colour code for the treatment of chromatography colour cell feed side color mark sensor cursor place carries out the chromatography colour code angle on target Y of chromatography is Y=360-(N-D+F), wherein N is that colour cell color mark sensor cursor is to the corresponding forme anglec of rotation of seal dot spacing, D is the corresponding forme anglec of rotation of colour code spacing, and F is the system balance angle.When L is that forme girth, C are that colour code spacing, M are that the color mark sensor cursor is to the distance of seal point, E is the system balance spacing, therefore N=(M/L) * 360, D=(C/L) * 360, F=(E/L) * 360 can derive chromatography colour code angle on target Y=360-((M/L) * 360-(C/L) * 360+F).Wherein system balance spacing E is used for solving plate-making or changes in material generation system balance, and E is 0 millimeter under normal circumstances; Colour code spacing C value is 20 millimeters in the industry standard.
In order to realize the forme position among Fig. 1, need finish in advance electronical line shaft and return Z-operation and treat chromatography colour cell servomotor initial offset.As shown in Figure 2, electronical line shaft need satisfy each forme drive servomotor also all at zero-bit (zero degree) after returning Z-operation, and colour cell forme colour code treats that chromatography colour cell forme colour code is on 7 seals point position before this moment on 3 seals point position.As shown in Figure 3, after only electronical line shaft returns zero, print under the state, front look colour cell colour code is printed onto when the feed side color mark sensor cursor place of chromatography colour cell is treated in colour code arrival on the printing material, and color mark sensor detects initial front look colour code correspondence and treats that chromatography group forme position X equals α.
As shown in Figure 4, the print direction of electronical line shaft colored printing system is forward in the present embodiment, and the go forward chromatography colour code 11 of colour cell of printing material is positioned at the rear side for the treatment of chromatography colour cell chromatography colour code 12.Therefore in the present embodiment step 1) according to the forme perimeter L, colour code spacing C, the color mark sensor cursor comprises to the detailed step apart from M calculating chromatography colour code angle on target Y of seal point: by obtain the print direction of electronical line shaft colored printing system by the electronical line shaft servo electrical machinery system, the print direction that obtains in the present embodiment is forward, this moment, ((M/L) * 360-(C/L) * 360+F) obtained each chromatography colour code angle on target Y that treats the chromatography colour cell according to Y=360-, wherein L is the forme girth, C is the colour code spacing, M is the distance that the color mark sensor cursor arrives the seal point, and F is the system balance angle.
Calculate in the present embodiment step 1) and obtain each detailed step for the treatment of the open interval of chromatography colour cell feed side color mark sensor and be: the interval angle Q of detection window that calculates color mark sensor according to Q=(R/L) * 360, calculate the angle of release degree W1 of color mark sensor, close angle W2 according to what W2=Y+Q/2 calculated color mark sensor according to W1=Y-Q/2, according to the angle of release degree W1 of color mark sensor with close the open interval W that angle W2 obtains color mark sensor, wherein R is that the color mark sensor detection window is interval, and Y is chromatography colour code angle on target.In the present embodiment, according to the angle of release degree W1 of color mark sensor with close the open interval W that angle W2 obtains color mark sensor and specifically refer to: when the value of the angle of release degree W1 of color mark sensor and the value of closing angle W2 are timing, effective open interval of color mark sensor is W1＜W＜W2, otherwise the color mark sensor valid interval is W1＜W＜360 and 0＜W＜W2.
The color mark sensor of present embodiment adopts the German SICK NT8 of company photoelectric sensor, the electronical line shaft servo electrical machinery system is the electronical line shaft servo electrical machinery system based on the simotion D445 driver of Siemens Company, the forme roller of each colour cell of simotion D445 driver control realizes treating the adjusting of chromatography colour cell forme roller.
The chromatography process of present embodiment is as follows: color mark sensor is located at the feed side for the treatment of the chromatography colour cell, seal point 3 between printing material 1 at first is admitted between the forme roller 4 that impresses rubber roll and front look colour cell prints, then continue to be sent to along predefined paths the position of the color mark sensor 5 of the feed side for the treatment of the chromatography colour cell, color mark sensor 5 is at the hot spot 6 of a 1 * 3mm of printing material projection, hot spot 6 is the sensor light target position for the treatment of the chromatography colour cell, then printing material is admitted to the impression rubber roll and treats that the seal point 7 between the forme roller 8 of chromatography colour cell prints, present embodiment then detects the colour code of front look colour cell in advance by sensor light target position, read its corresponding current chromatography colour cell forme position for the treatment of, judge and the forme error E RROR that treats the chromatography colour cell, finish the forme correction for the treatment of the chromatography colour cell thereby output in real time the electronical line shaft servo electrical machinery system.Printing material length between the hot spot 6 of color mark sensor 5 and the seal point 7 be the color mark sensor cursor to the seal point apart from M, more polychrome is by that analogy to treat chromatography to treat chromatography.In the present embodiment, each parameter value is specific as follows:
The forme perimeter L is 500 millimeters.
The color mark sensor cursor is to seal dot spacing A=350 millimeters.
Colour code spacing C is 20 millimeters.
System balance spacing E is 0 millimeter.
Initial color mark sensor detects front look colour code correspondence and treats chromatography group forme position angle X=35 degree.
Color mark sensor detection window length R=20 millimeter.
Colour cell color mark sensor cursor is to the corresponding forme anglec of rotation N=(M/L) of seal dot spacing * 360=(350/500) * 360=252 degree.
The corresponding forme anglec of rotation D=(C/L) of colour code spacing * 360=(20/500) * 360=14.4 degree.
System balance angle F=(E/L) * 360=(0/500) * 360=0 degree.
Chromatography colour code desired value Y=360-(N-D+F)=360-(252-14.4+0)=122.4 degree.
Start offset angle Z=Y-X=122.4-35=87.4 degree.
The interval angle Q=(R/L) of color mark sensor detection window * 360=(20/500) * 360=14.4 degree.
Color mark sensor angle of release degree W1=Y1-Q/2=122.4-14.4/2=115.2 degree.
Color mark sensor closes angle W2=Y2+Q/2=122.4+14.4/2=129.6 degree.
When color mark sensor detects front look colour code correspondence and treats that chromatography printing block position Y0=122 spends, forme correction error ERROR=Y-Y0=122.4-122=0.4 degree then.Final forme position and speed stack 0.4 degree of regulating is finished the chromatography error real time correction to treating that chromatography treats chromatography colour cell electronical line shaft servo electrical machinery system.
Embodiment two:
Present embodiment and embodiment one are basic identical, and its difference is that the print direction of electronical line shaft colored printing system is opposite, and as shown in Figure 5, the go forward chromatography colour code 11 of colour cell of printing material is positioned at the front side for the treatment of chromatography colour cell chromatography colour code 12.Therefore comprise to the detailed step apart from M calculating chromatography colour code angle on target Y of seal point according to forme perimeter L, colour code spacing C, color mark sensor cursor in the present embodiment step 1): by obtain the print direction of electronical line shaft colored printing system by the electronical line shaft servo electrical machinery system, the print direction that obtains in the present embodiment is for reverse, and therefore ((M/L) * 360+ (C/L) * 360+F) obtains each chromatography colour code angle on target Y that treats the chromatography colour cell according to Y=360-; Wherein L is that forme girth, C are that colour code spacing, M are the distance that the color mark sensor cursor arrives the seal point, and F is the system balance angle.
In the present embodiment, each parameter value is specific as follows:
The forme perimeter L is 500 millimeters.
The color mark sensor cursor is to seal dot spacing M=350 millimeters.
Colour code spacing C is 20 millimeters.
System balance spacing E is 0 millimeter.
Initial color mark sensor detects front look colour code correspondence and treats chromatography group forme position angle X=35 degree.
The interval R=20 millimeter of color mark sensor detection window.
Colour cell color mark sensor cursor is to the corresponding forme anglec of rotation N=(M/L) of seal dot spacing * 360=(350/500) * 360=252 degree.
The corresponding forme anglec of rotation D=(C/L) of colour code spacing * 360=(20/500) * 360=14.4 degree.
System balance angle F=(E/L) * 360=(0/500) * 360=0 degree.
Chromatography colour code desired value Y=360-(N+D+F)=360-(252+14.4+0)=93.6 degree.
Start offset angle Z=Y-X=93.6-35=58.6 degree.
The interval angle Q=(R/L) of color mark sensor detection window * 360=(20/500) * 360=14.4 degree.
Color mark sensor angle of release degree W1=Y1-Q/2=93.6-14.4/2=86.4 degree.
Color mark sensor closes angle W2=Y2+Q/2=93.6+14.4/2=100.8 degree.
When color mark sensor detects front look colour code correspondence and treats that chromatography printing block position Y0=94 spends, forme correction error ERROR=Y-Y0=93.6-94=-0.4 degree then.Final forme position and speed stack-0.4 degree of regulating is finished the chromatography error real time correction to the electronical line shaft servo electrical machinery system for the treatment of the chromatography colour cell.
The above only is preferred embodiment of the present invention, and protection scope of the present invention is not limited in above-mentioned embodiment, and every technical scheme that belongs to the principle of the invention all belongs to protection scope of the present invention.For a person skilled in the art, some improvements and modifications of under the prerequisite that does not break away from principle of the present invention, carrying out, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1. chromatography error real-time correction method before the seal that is used for electronical line shaft colored printing system is characterized in that implementation step is as follows:
1) at the feed side for the treatment of the chromatography colour cell color mark sensor is set; After installing each colour cell forme, electronical line shaft returned zero make the chromatography colour code of each colour cell forme be positioned on the seal point position, the driving servomotor of each colour cell forme also all is positioned at zero-bit; Be positioned at the chromatography colour code angle on target Y that the front colour cell colour code for the treatment of chromatography colour cell feed side color mark sensor cursor place carries out chromatography according to forme perimeter L, colour code spacing C, color mark sensor cursor on the chromatography colour code that is used for treating on the chromatography colour cell forme and the printing material to calculating apart from M of seal point, the open interval that each treats chromatography colour cell feed side color mark sensor is obtained in calculating;
2) start printing, when the color mark sensor for the treatment of chromatography colour cell feed side detects front colour cell colour code on the printing material, obtain the angle X that treats between chromatography colour code on the chromatography colour cell forme and the seal point by the electronical line shaft servo electrical machinery system, then calculate initial offset angle Z according to Z=Y-X, and will treat chromatography colour cell forme pivot offset angle Z;
3) when presswork, detect in real time front colour cell colour code on the printing material by the color mark sensor for the treatment of chromatography colour cell feed side, obtain by the electronical line shaft servo electrical machinery system during front colour cell colour code on detecting printing material and treat the angle Y0 between the chromatography colour code and seal point on the chromatography colour cell forme, obtain forme according to ERROR=Y-Y0 simultaneously and correct error E RROR and export in real time the electronical line shaft servo electrical machinery system to and finish each forme for the treatment of the chromatography colour cell and proofread and correct.
2. according to claim 1 for chromatography error real-time correction method before the seal of electronical line shaft colored printing system, it is characterized in that in the described step 1) according to the forme perimeter L, colour code spacing C, the color mark sensor cursor comprises to the detailed step apart from M calculating chromatography colour code angle on target Y of seal point: by obtain the print direction of electronical line shaft colored printing system by the electronical line shaft servo electrical machinery system, when print direction was forward, ((M/L) * 360-(C/L) * 360+F) obtained each chromatography colour code angle on target Y that treats the chromatography colour cell according to Y=360-; When print direction when being reverse, ((M/L) * 360+ (C/L) * 360+F) obtains each chromatography colour code angle on target Y that treats the chromatography colour cell according to Y=360-; Wherein L is that forme girth, C are that colour code spacing, M are the distance that the color mark sensor cursor arrives the seal point, and F is the system balance angle.
3. according to claim 1 and 2 for chromatography error real-time correction method before the seal of electronical line shaft colored printing system, it is characterized in that in the described step 1) calculating and obtain each detailed step for the treatment of the open interval of chromatography colour cell feed side color mark sensor and be: the interval angle Q of detection window that calculates color mark sensor according to Q=(R/L) * 360, calculate the angle of release degree W1 of color mark sensor according to W1=Y-Q/2, close angle W2 according to what W2=Y+Q/2 calculated color mark sensor, according to the angle of release degree W1 of color mark sensor with close the open interval W that angle W2 obtains color mark sensor, wherein R is that the color mark sensor detection window is interval, and Y is chromatography colour code angle on target.
4. according to claim 3 for chromatography error real-time correction method before the seal of electronical line shaft colored printing system, it is characterized in that described according to color mark sensor angle of release degree W1 and close the open interval W that angle W2 obtains color mark sensor and specifically refer to: when the value of the angle of release degree W1 of color mark sensor and the value of closing angle W2 are timing, effective open interval of color mark sensor is W1＜W＜W2, otherwise the color mark sensor valid interval is W1＜W＜360 and 0＜W＜W2.
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