CN1067946C - Plate optical fibre scanning and photocomposing plate-making machine - Google Patents
Plate optical fibre scanning and photocomposing plate-making machine Download PDFInfo
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- CN1067946C CN1067946C CN 95117835 CN95117835A CN1067946C CN 1067946 C CN1067946 C CN 1067946C CN 95117835 CN95117835 CN 95117835 CN 95117835 A CN95117835 A CN 95117835A CN 1067946 C CN1067946 C CN 1067946C
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Abstract
The present invention relates to a plate optical fibre scanning and photocomposing plate-making machine which belongs to the technical field of printing, a plurality of light emitting diodes are taken as a light source, a plurality of optical fibres are coupled directly with the light emitting diodes, and light output ends are ranged intensively by a straight line to be assembled into a scanning head. A high-speed PS plate is arranged on a work top horizontally. The X direction scanning is realized by the reciprocating motion of the scanning head drawn by a step motor, the Y direction scanning is realized by the step motor which draws the work top to move perpendicular to the X direction, and dynamic positioning is carried out by double gratings. Graphic data which is sent by a computer controls the light strength of the light emitting diodes through a signal distributor. The scanning area of the photocomposing plate-making machine of the present invention reaches in folio, spread and even larger, a plurality of scanning resolutions from 726 lines per inch to 3000 lines per inch can be selected, and the whole process automation operation from photocomposition to plate making is realized.
Description
Plate optical fibre scanning and photocomposing plate-making machine belongs to printing technology.
As everyone knows, along with optical technology and development of computer, laser photo-typesetting has been popular in generation.Its plate-making process is in two steps: the first step is to deposit texts and pictures information in computer, and computer is bright or dark by the texts and pictures information output dot matrix Data Control scanning light beam of having set type, and scanning forms sub-image on photographic film, film through develop, photographic fixing obtains the phototypesetting egative film; Second step was spliced into the phototypesetting egative film by hand splits egative film, with uviol lamp the literal on this egative film, image copy is being split on the PS version again, develops through alkali lye, obtains the PS forme that uses for printing.
The laser photocomposing machine of current supply the market and 95 years external new direct platemaking machine of releasing, product as ECRM company, AGFA company and Hangzhou Telecommunications Equipment Plant, its light source is He-Ne laser instrument, argon ion laser or semiconductor laser, adopts drum-type scanning in outer drum-type scanning, the tilting mirror, tilting mirror flat bed scanning or acousto-optic modulation flat bed scanning.Above-mentioned last a kind of scan mode adopts the beam of laser light source to produce the multichannel light beam through first order sound opto-deflector earlier, produces the more modulated beam of light of multichannel (referring to " Chinese printing " fourth phase nineteen ninety-five) through second level acousto-optic modulator again.Peking University is succeeding in developing high speed PS version (number of patent application: on the basis 89107537.2), developed laser-to-plate system (number of patent application: 89109154.8), this system is to be suitable for plate with high speed PS version, can finish phototypesetting and plate-making process continuously and automatically.Above-mentioned laser-to-plate system by people such as the Li Xin of Peking University chapter invention is a light source with the He-Ne laser instrument, adopt tilting mirror, platform scanner mode, the scanning breadth is four to open, this scan mode helps automatically PS version up and down, but, then be difficult to further enlarge the scanning breadth as not adopting a plurality of rotating mirror scannings district splicing.
The purpose of this invention is to provide a kind of new scan mode, the phototypesetting platemaking machine of forming based on this scan mode not only has high dynamic locating accuracy and high scanning resolution, and its maximum scan breadth can reach and split or bigger, and has and be easy to automatically the advantage of PS version up and down.
Essence of the present invention is to change tilting mirror flat-bed scanning mode into multiple beam flat scanning mode, carry out accurate Kinematic Positioning with double grating, with a plurality of light emitting diodes (LED) is light source, realize the luminous point solid matter with optical fiber, control these light emitting diodes to realize modulation through signal distributor the multi-channel scanning light beam by the texts and pictures lattice information that computer sends.Specifically:
1,8N (N=1,2,3 ... being a selected natural number) individual light emitting diode directly is coupled with 8N root optical fiber respectively, and fibre-optic bright dipping end press the straight line solid matter, forms bifurcated biography light beam and forms the optical fiber scanning head together with image-forming objective lens again.
2, be to be suitable for plate, plate horizontal positioned with high speed PS version.M (M=1,2,3 ... being a selected natural number) individual optical fiber scanning head is fixed on a rigid beam below, each optical fiber scanning head is all in plate surface paraxial imagery, obtain clearly M solid matter point as array, and each as array be positioned at same with Y on the parallel straight line of guide rail.Drag crossbeam along the directions X horizontal movement with motor, just formed the parallel sweep of 8NM road light beam on the plate surface.After directions X was swept an one way, crossbeam stopped, and workbench carries plate and stops after the Y direction perpendicular to directions X moves a segment distance (equaling the length of a point as array) in horizontal plane, and crossbeam is swept an one way along the opposite direction of directions X then.So repeat, just formed the two-dimensional scan of 8NM road light beam.
3, the lattice information sent of computer is through 8NM light emitting diode of signal distributor control, that is the light intensity of control 8NM road light beam, the computerized control composing of taking pictures of 8NM road light beam of realization.
4, carry out Kinematic Positioning control with double grating, match, can in high speed shuttle-scanning process, realize high row alignment precision and repetitive positioning accuracy with accurate machine construction.Scanning resolution has multiple available from 726 line/inch-3000 line/inches.
5, plate optical fibre scanning and photocomposing plate-making machine is made up of frame for movement and electronic control system two large divisions; Can be about PS version imaging system referring to patent 89109154.8.
Its frame for movement of phototypesetting platemaking machine of the present invention is shown in Fig. 1 .1 and Fig. 1 .2, and it is made up of to stepper motor 112, workbench 113, a group version block 114, lathe bed 115, cassette cover 116, casing 117, optical fiber scanning head 120, column 121, support 122, sucker 123 and vavuum pump 124 etc. to guide rail 111, Y to grating chi 109, high speed PS version 110, Y to guide rail 107, magazine 108, X to stepper motor 106, X to leading screw 105, X a group version motor 101, manipulator 102, optical fiber scanning head assembly 103, crossbeam 104, X.
Its electronic control system block diagram of phototypesetting platemaking machine of the present invention is shown in Fig. 1 .3, and except that editor's computer 209 and the light emitting diode 204 as light source, it is made up of Programmable Logic Controller 214, signal distributor 205, scanning monitor 213 etc.The X of scanning monitor 213 to scan control by bit synchronization pulse signal generator 407, horizontal synchronizing pulse signal generator 406, X to drive pulse signal generator 422, X to forward scan (advancing to sweep) starting point X1 initialize switch 402 and comparator 404, X to compositions such as reverse scan (move back and sweep) starting point X2 initialize switch 403 and comparators 405; Y is made up of to drive pulse signal generator 424 etc. worktable displacement control circuit 423 and Y to scan control.
For making phototypesetting plate-making function at brightroom operation, except that scanning monitor 213, Programmable Logic Controller 214 and vavuum pump etc., all the other all are installed within the casing of light sealing.
Operating personnel make the operation of phototypesetting platemaking machine by operating desk 215.
Programmable Logic Controller 214 sends to computer 209 and is ready to information, and the information such as phototypesetting start and stop sent of receiving computer 209.The X that X sends by Programmable Logic Controller 214 to drive pulse signal generator 422 to movement instruction to X to 106 drive pulse signals of stepper motor.The Y that Y sends by Programmable Logic Controller 214 to drive pulse signal generator 424 to movement instruction to Y to 112 driving pulses of stepper motor.X locatees to grating chi 109 with X to scanning.The X that comparator 404 will be sent to grating digital readout 401 by X is to real-time coordinate and X
1(advancing to sweep starting point) relatively exports when equal and into sweeps the starting point pulse; The X that comparator 405 will be sent to grating digital readout 401 by X is to real-time coordinate and X
2(move back and sweep starting point) relatively exported to move back when equal and swept the starting point pulse.Horizontal synchronizing pulse signal generator 406 receives and advances to sweep the starting point pulse and move back and sweep the starting point pulse, and advances to sweep the starting point pulse or move back and sweep the starting point pulse as horizontal synchronizing pulse by the scanning that Programmable Logic Controller 214 the is sent Instruction Selection of advancing and retreat, and exports to computer 209.Bit synchronization pulse signal generator 407 receive X to grating digital readout 401 send+horizontal synchronizing pulse and the last pulse signal of row that 5 μ m (advancing to sweep 5 μ m) pulse and-5 μ m (move back and sweep 5 μ m) pulse signal and horizontal synchronizing pulse signal generator 406 are sent, to computer 209 and signal distributor 205 carry-out bit lock-out pulses.Computer 209 receives horizontal synchronizing pulse and bit synchronization pulses, and matches with it and in an orderly manner texts and pictures information is sent to signal distributor 205.Y is located to the grating chi by Y to scanning.Worktable displacement control circuit 423 receive Y to grating digital readout 216 send+5 μ m(Y, the 5 μ m that march forward) pulse signal and-5 μ m(Y 5 μ m that draw back) pulse signal, when workbench along Y when displacement reaches setting value (for example a point is as array length), output " platform is anxious to stop " signal gives Y to drive pulse signal generator 424, makes Y to step motor stop.
Scanning start stop command and texts and pictures information that phototypesetting platemaking machine receiving computer editing system of the present invention is sent, operation automatically under the control of the electronic control system of this machine, scanning forms sub-image on the first coating silver salt photosensitive layer of high speed PS version earlier, and then promptly gets the PS forme of using for offset press through the processing of plate imaging system.
Embodiment
The numeral that marks for the purpose of concrete is described in further detail technical characterictic of the present invention below in conjunction with example, for should not regarded particular determination to the technology of the present invention essence as.
1, frame for movement
See Fig. 1 .1 and Fig. 1 .2.
1.1, the workbench of phototypesetting platemaking machine 113 made by granite, lathe bed 115 and the welding of support 122 usefulness square steel, this structural rigidity is good, in light weight.Crossbeam 104 connects with the nut of X on leading screw 105, drags lower edge X to guide rail 107 motions at X to stepper motor 106.Workbench 113 is driven through the leading screw nut to stepper motor 112 by Y, moves to guide rail 111 along Y.
Workbench 113 faces are planes, horizontal positioned, and the groove of opening on the table top communicates with its inner chamber, and outwards bleeding with vavuum pump to make high speed PS version be adsorbed on the work top.
For making high speed PS version that definite position be arranged on workbench 113, workbench 113 edges are provided with four and dial version mechanism, drive the cam rotation with low speed synchromotor 101 and dial version, make the plate location by block 114.
1.2, the X of crossbeam 104 adopts the transmission of coarse pitch ball-screws and nuts to motion, with rolling guide 107 guiding, their coefficient of friction is little, the precision height, the life-span is long, makes crossbeam can keep higher mechanical precision when high-velocity scanning.This is that the literal, the figure that guarantee large format have one of essential condition of high scanning accuracy.
1.3, manipulator 102 has two vacuum cups 123, the piston that moves up and down by little cylinder of sucker 123 drives the about 35mm of stroke.The suction of sucker 123 is exitted and is moved up and down by vavuum pump and two vacuum solenoids controls.Little cylinder is installed in the below of crossbeam 104, with crossbeam along X to moving.When crossbeam moves on to magazine 108 openings top, sucker 123 descends, the front end that picks up PS version in the box is (in Fig. 1 .2, it is to the right the X positive direction, be decided to be direction of advance), plate is dragged on the workbench 113 sucker 123 venting then along the X forward, version drops on the work top, finishes the adjustment of the printing plate action through dialling version again.In the time of following edition, sucker 123 picks up the plate rear end, plate is released workbench to the right, sends into the plate imaging system through passage 118.
1.4, magazine 108 is aluminium alloy elements of a sealing, has plug-in cassette cover 116, can put 20 of high speed PS versions in the box.Magazine has in half casing 117 that inserts the light sealing approximately, extracts half lid, and manipulator 102 just can take out high speed PS version from the opening of magazine.Also have 20 brown paper in the magazine, long 750mm, wide 560mm is inserted in respectively between each high speed PS version, so as not to the plate adhesion and when magazine is hauled out the PS version the surperficial scratch of following PS version.
2, optical scanning system
Optical scanning system is made up of optical fiber scanning head assembly 103, two-dimentional scanning mechanism and signal distributor 205 3 parts.
2.1, optical fiber scanning head assembly
The structure of optical fiber scanning head assembly 103 such as Fig. 2 .1.Porous plate 202 horizontal positioned, two (when M=2) optical fiber scanning head 120A and 120B are vertically mounted on the porous plate.128 (when N=16) light emitting diodes are arranged on each optical fiber scanning head, directly be coupled with 128 optical fiber respectively, the light output end of each optical fiber is pressed the straight line solid matter, forms bifurcated and passes light beam 201.The light output end that bifurcated passes light beam is the lattice array 203A or the 203B of 128 solid matters through object lens 207 imagings.With scanning resolution 847DPI (promptly 33.3 lines/mm) are example, the middle spacing d=30 μ m of consecutive points picture, point is as length=128 * 30 μ m=3.840mm of array.It is the integral multiple of a point as array length as the distance between array 203A and the 203B a little that two adjacent fiber probes become, and when being used to sweep when splitting breadth, gets 68 times.Like this, equal 68 * 3.840mm=261.120mm as the distance between array 203A and the 203B.A plurality of optical fiber scanning heads can be installed on the porous plate,, save sweep time to increase the scanning light beam number.Change the optical magnification of point, just can change the center distance of consecutive points picture, just can realize multiple different scanning resolution as array.
2.2, two-dimentional scanning mechanism and scanning process
As Fig. 2 .2, workbench 113 horizontal positioned, on work top, workbench carries plate and moves along the Y direction high speed PS version with vacuum suction, is located to grating chi 208 by Y.Optical fiber scanning head assembly 103 be fixed on the below of crossbeam 104 and become on plate 110 surface clearly as, two dot-matrix array 203A and 203B be positioned at same with Y on the parallel straight line of guide rail 111.Two optical fiber scanning head 120A and 120B are driven reciprocating along directions X by crossbeam 104, by X to grating chi 109 location.With optical fiber scanning head 120A is example, and when workbench 113 stopped, point dropped on the A place as array 203A, and after optical fiber scanning head 120A swept an one way along the X forward, point dropped on the D place as array 203A, scans out the scan line of 128 solid matters on the way.Pause then about 2 seconds, workbench 113 stops along Y direction displacement 3.840mm again therebetween, and this time point drops on the C place as array 203A.Then the optical fiber scanning head is swept an one way along the X negative sense, and point drops on the B place as array 203A, and new scan line is connected with the scan line solid matter of a last one way.Sweep 68 one way, each optical fiber scanning head scans out 68 * 128 scan lines, and two optical fiber scanning heads scan out 2 * 68 * 128=17408 root scan line altogether, have covered the whole space of a whole page of splitting.
The optical fiber scanning head sweep an one way will through acceleration, at the uniform velocity, decelerate to and stop several stages, the version core is only in zone at the uniform velocity.Outside the version core, the some picture is dark all, does not expose.Bright lattice information decision of secretly sending at version in-core point picture by computer 209.Crossbeam 104 whenever moves past 5 μ m, X is to grating digital readout 401 407 burst pulses of bit synchronization pulse signal generator to scanning monitor 213, the latter receives that whenever 65 μ m dfisplacement pulses send out a bit synchronization pulse (expression has moved past 30 μ m), deliver to the lattice information that computer 209 requests are sent out new on the one hand, deliver to signal distributor 205 on the other hand, make the optical fiber scanning head get exposure ready.Therefore, in optical fiber scanning head uniform motion process, the bright of each some picture secretly upgraded once every 30 μ m.Through 68 one way scannings, high speed PS version 110 has just write down a literal or a figure of splitting breadth.
Because computer 209 can not send dot array datas with 256 the tunnel, but divides transmission a collection of 256 dot array datas (0 or 1) 32 times with 8 the tunnel.Timesharing sends data must account for a bit synchronization cycle.After computer 209 was received the first bit synchronization pulse, the dot array data that timesharing sends was received successively by signal distributor 205, latchs, and is all on board up to 256 data.In the moment that second bit synchronization pulse arrives, signal distributor 205 is delivered to 204 controls of 256 light emitting diodes to 256 data, and it is bright dark, and the second gust data of marking words and phrases for special attention that begin simultaneously that receiving computer 209 sends.
2.3, signal distributor
The schematic circuit of signal distributor 205 such as Fig. 2 .3, the top of figure has 32 8D triggers 210 from left to right to arrange, the input of the 8D trigger in output termination the right of each 8D trigger.8 road dot array datas that computer 209 sends are received 8 road inputs of a leftmost 8D trigger.Computer 209 also sends one road shift pulse synchronously, as the common clock of 32 8D triggers.After computer 209 is received the horizontal synchronizing pulse and first bit synchronization pulse that scanning monitor 213 is sent, 32 shift pulses of running fire, repetition period is T, simultaneously change 8 new dot array datas every time T, rising edge at each shift pulse, dot array data a slice 8D trigger that moved right has formed 8 tunnel from left to right data flow thus.After 32 shift pulses, the output of 32 8D triggers has upgraded whole 256 site battle array data, the input of 32 8 latch 211 of these data dispensings.The common clock of these 8 latch is bit synchronization pulses, rising edge second bit synchronization pulse, each 8 latch latch the data of input and export at outputs the negative electrode of 256 light emitting diodes, second bit synchronization in the cycle, the data of 32 8 latch outputs remain unchanged, and 32 8D triggers begin the new data that receiving computer is sent.The anode of each light emitting diode all is connected on the anode of 5V power supply, and when the negative electrode of certain light emitting diode was low level, this light emitting diode was bright, and is then dark when negative electrode is high level.First bit synchronization cycle and before, the luminance of light emitting diode is by circuit initial state decision, is dark when being ready to (power on and zero clearing) entirely.
3, the making of optical fiber scanning head and optical fiber scanning head assembly and installation are adjusted
3.1, the making of optical fiber scanning head
Adopt gallium arsenide phosphide (GaAsP) light emitting diode, it is encapsulated on the ceramics seat 301, shown in Fig. 3 .1.Again a plurality of such ceramics seats are embedded in the hole of aluminium matter radiating block 304.An optical fiber scanning head has 128 light emitting diodes.With diameter is 128 silicon fibers of 45 μ m, and end face is processed as optical surface, is directly coupled on the light emitting diode and with glue correspondingly and fixes.
The bright dipping end of 128 optical fiber is tightened solid matter in aluminium matter fiber bench 303 become delegation, compress, fix with glue again, form bifurcated and pass light beam 201 with metallic plate 302.After the optical fiber that will exceed fiber bench 303 lower ends blocked, polishing up to the optical fiber light output end became minute surface, formed the solid matter linear array light source of 128 luminous points.Pass the bright dipping end of light beam 201 at bifurcated, the arrangement of 128 optical fiber is orderly, the optical fiber order is identical with the order of its light emitting diode that is coupled in Fig. 2 .3, and is consistent with the dot chart in editor's computer 209 internal memories to guarantee the dot chart that scanning obtains on the plate.
As Fig. 3 .2, fiber bench 303 insertions to be gone up in the lens barrel 305, object lens 207 are contained in down lens barrel 306.Last lens barrel and following lens barrel socket, fastening with screw.128 pointolite arrays of fiber bench 303 light output ends obtain the array of 128 solid matter point pictures through the object lens imaging.Change optical tube length, can regulate optical magnification, the array total length of 128 some pictures is met the requirements, for example equal 3.840mm, i.e. the center distance d=30 μ m of consecutive points picture.Tighten the screws is also bonding firm fiber bench 303 and last lens barrel 305 with glue then.
3.2, the installation adjustment of optical fiber scanning head assembly
The light-emitting window of the probe sheath of light power meter at the optical fiber scanning head, junction good seal.The public positive negative electrode of light emitting diode connects the positive pole of 5V voltage-stabilized power supply, as Fig. 2 .3.Light a light emitting diode successively, measure the luminous power of a single point picture, fine tuning current-limiting resistance 212, the luminous power that makes a single point picture is 0.03 μ w.
Two optical fiber scanning head 120A of modulated good luminous power and 120B are installed on the porous plate 202,, they all are imaged on the scale face of a glass chi as 2.1.Adjust the orientation of optical fiber scanning head on porous plate, two points are positioned on the same straight line parallel with scale direction as array 2032A and 203B, and the spacing of the left end point (or right endpoint) of two row point picture is 261.120mm.At last two optical fiber scanning head 120A and 120B and porous plate 202 fastening cementing.
Can in the phototypesetting platemaking machine, install now and adjust optical fiber scanning head assembly 103.
As Fig. 1 .1 and Fig. 1 .2, porous plate 202 usefulness two root posts 121 that two optical fiber scanning head 120A and 120B are housed are lifted on the below of crossbeam 104, signal distributor 205 circuit boards are installed in the top of crossbeam 104.On workbench 113, put a high speed PS version, make two optical fiber scanning heads in the surface imaging of high speed PS version.As array 203A and 203B, the upper-lower position of fine setting porous plate 202 makes two row point picture reach the most clear with microscope viewpoint.Be carved with on 113 of the granite worktables one with Y to the parallel reference line of guide rail 111, along directions X translation crossbeam 104, two row point is dropped on the reference line as 203A and 203B, depart from if having, the side direction screw of fine-tuning porous plate 202 drops on the reference line simultaneously up to two row point picture.
4, double grating Dynamic High-accuracy positioning control technology
(promptly 33.3 lines/mm) are example, and the directions X delegation that starts an edition is had 2.4 * 10 with scanning resolution 847DPI
4Individual, Y direction one shows 1.7 * 10
4Individual point.For guaranteeing the quality of color bag texts and pictures, plate optical fibre scanning and photocomposing plate-making machine adopts the double grating location.Directions X and Y direction are respectively with direct light grid, and to determine the position of each scanning element on the space of a whole page, the repetitive positioning accuracy of both direction reaches ± 10 μ m.
4.1, in the phototypesetting platemaking machine, adopt the direct light grid to make the dynamically characteristics of location
The scanning of directions X is that high-speed straight-line moves back and forth, and quicken continually, deceleration, start and stop and oppositely, uses stepper motor to drive and can realize these functions well.But if locate by the step number of the common stepper motor of using tricks, then be difficult to satisfy the requirement of texts and pictures precision at the full width face, because all can causing step-out, the gap of transmission mechanism (as leading screw, nut) and the quality of deformation and moving component is big, speed is high, acceleration is big etc. produces deviations, and deviation can not be eliminated repeatedly accumulating in the scanning.The present invention is using the stepper motor driven while, adopts direct light grid location, its direct slotted line displacement, the deviation of having avoided transmission mechanism to cause.Because the grating signal reflection is the actual effect of displacement of the lines, and response speed is fast, can in moving back and forth frequently, fast, realizes continuous measurement, thereby guarantee high positioning accuracy at the full width face.
4.2, the dynamic positioning method of directions X shuttle-scanning
X to grating chi 109 and X to grating digital readout 401
As Fig. 2 .2, X is fixed on X near guide rail 107 to the scale of grating chi 109, and both are parallel to each other; Moving chi is fixed on the left end of crossbeam 104, moves with crossbeam and optical fiber scanning head.Adopting resolution ratio is the grating chi of 5 μ m.Be provided with a reference point near X-axis top on the scale of grating chi, when moving chi passes through this reference point, grating digital readout 401 is inserted a selected coordinate figure, after this all there is a definite coordinate figure arbitrary position of moving chi, promptly set up X to reference axis, and moved the binary-coded decimal signal of the real-time coordinate of chi through cable output.In addition, from grating digital readout 401, extract+5 μ m pulses and-5 μ m pulses: the moving chi 5 μ m that whenever advance, digital display meter 401 sends a negative pulse, claim X to+5 μ m pulses, moving chi whenever retreats 5 μ m, and digital display meter 401 sends a negative pulse from another output, be called X to-5 μ m pulses, see Fig. 4 .1.The positive direction of X-axis is direction as shown in Fig. 2 .2, and this direction also is called into sweeps direction, and the negative direction of X-axis is called to move back sweeps direction.
Optical fiber scanning head X obtains horizontal synchronizing pulse to the binary-coded decimal signal of real-time coordinate after processing of circuit, be used for determining the starting point of a line scanning.X obtains the bit synchronization pulse to+5 μ m pulses and-5 μ m pulses after processing of circuit, be used for determining the exposure position of each scanning element.
The generation of horizontal synchronizing pulse
According to directions X length, determine two end points X of version core directions X to the core of starting an edition
1And X
2Coordinate figure, for example get X
1=120.000mm, X
2=850.000mm, the X of version core is exactly X to length
2-X
1=730.000mm.With toggle switch 402 X is set
1Binary-coded decimal: 0001,0010,0000,0000,0000,0000, with toggle switch 403 X is set
2Binary-coded decimal: 1000,0101,0000,0000,0000,0000.With comparator 404 binary-coded decimal and the X of X to real-time coordinate
1Binary-coded decimal compare, see Fig. 4 .1, when both are equal, send and into sweep the starting point pulse, expression optical fiber scanning head arrives a version core end points X
1With comparator 405 binary-coded decimal and the X of X to real-time coordinate
2Binary-coded decimal compare, when both are equal, send to move back and sweep the starting point pulse.
The 1B (3 pin) and 2A (5 pin) end that advance to sweep starting point pulse signal input alternative data selector 406, move back 1A (2 pin) and 2B (6 pin) end of sweeping starting point pulse signal input alternative data selector 406, see Fig. 4 .2, choose which as output signal by its selection control end (1 pin) input signal (from Programmable Logic Controller 214, be called " scanning advance and retreat ", high level is represented forward scan, and low level is represented reverse scan) level decision.During forward scan, select and into sweep the starting point pulse and export from 4 pin, as horizontal synchronizing pulse, and move back sweep the starting point pulse from the output of 7 pin as the last pulse of row; During reverse scan, selection result is just in time opposite, and selected moving back swept the starting point pulse and export from 4 pin as horizontal synchronizing pulse, advances to sweep the starting point pulse and exports from 7 pin as capable last pulse.15 pin of data selector 406 are Enable Pins, will " be ready to " signal (from Programmable Logic Controller 214, low level is effective) and import this pin, and data selector 406 only just can have signal output afterwards " being ready to " like this.
X
2Binary-coded decimal provide by toggle switch 403, the minimum change amount is 5 μ m.Is the contained exact value of counting of delegation according to X to the long size of row, adjusts X
2Numerical value, the starting point of reverse scan is alignd with the terminal point of forward scan, deviation is less than 5 μ m.
The generation of bit synchronization pulse
In the upper right corner of Fig. 4 .2, X, counts to displacement X through NAND gate 407 enter counters 408 to+5 μ m pulses and-5 μ m pulses (being negative pulse).The divider ratio of counter 408 gets 6, makes counter put number with horizontal synchronizing pulse, and per 65 μ m dfisplacement pulses just send a pulse from 15 pin carry outputs later on, and expression optical fiber scanning head moves past 30 μ m.This pulse through with door 413 after be exactly the bit synchronization pulse through monostable flipflop 414 shapings again.Starting to control making with the transmission of door 413 contraposition lock-out pulses uses, must be after being ready to and going synchronously, just send the bit synchronization pulse before the last pulse of row, this has just guaranteed only in scan period, make a call to a point every 30 μ m after the horizontal synchronizing pulse, stop to get ready after the last pulse of being expert at.
Change the divider ratio of counter 408, just can change the center distance of adjacent two luminous points of directions X, this spacing should equate to the spacing of adjacent two luminous points with Y.Therefore, match, adjust the divider ratio of counter 408, just can realize multiple scanning resolution with the optical magnification of adjusting the optical fiber scanning head.Plate optical fibre scanning and photocomposing plate-making machine of the present invention, scanning resolution from 726 lines/
Inch-3000 lines/
InchHave multiple available.
4.3, the localization method of Y scanning direction
The Y scanning direction be with Y to stepper motor 112 drag workbench 113 along Y to guide rail 111 realization of moving, with Y to grating chi 208 location.The workbench 113 5 μ m that whenever advance, Y sends a Y to+5 μ m pulses to grating digital readout 216, and workbench whenever retreats 5 μ m, and Y sends a Y to-5 μ m pulses to grating digital readout.After one way scanning, workbench 113 3.840mm that advances stops then, waits for that next X scans to one way at each X, process that workbench loiters that Here it is.Sweep one to starting an edition, workbench 113 is walked, is stopped 67 times.The location of workbench not only requires the deviation of each displacement to be not more than 10 μ m, and the deviation of 67 accumulative total total displacement also is not more than 10 μ m.
Fig. 4 .3 is the displacement control circuit of workbench 113.The Y that sends to grating digital readout 216 from Y is counted by forward-backward counter 416,417,418 to+5 μ m pulses and-5 μ m pulses.+ 5 μ m pulse signals insert the CD end of forward-backward counter 416, and-5 μ m pulse signals connect the CU end.Before beginning scanning, workbench 113 arrives sweep starting point earlier, sends " platform starting point " signal by limit switch, monostable flipflop 415 in Fig. 4 .3 is handled, produce a negative pulse from the Q end, give putting of three forward-backward counters 416,417,418 several control end PL, make them put number.After workbench 113 begins scanning, Y sends 5 μ m pulses to grating digital readout 216, when forward-backward counter 416,417, during 418 to 768 5 μ m displacements, the TCD output of forward-backward counter 418 (13 pin) sends a pulse, the CLK end of d type flip flop 421 is sent in this pulse after by NAND gate 420, making its output Q is high level by low level transition, this level signal is exactly " platform is anxious to stop " signal, it blocks the drive pulse signal of Y to stepper motor 112 immediately, make Y to step motor stop, thereby the single pass displacement of control workbench 113 is 3.840mm." platform start and stop " signal that Programmable Logic Controller sends before the downward single pass of Y continues to block Y to the stepper motor driving pulse, then Programmable Logic Controller " latchs removings " to 421 of d type flip flops signal is in time removed " platform urgency is stopped " signal, for Y next time gets ready to scanning.
After sending " platform anxious stops " high level signal, because the inertia of workbench 113 and transmission mechanism is gapped or deformation, workbench still has micro-displacement (advance or move back), causes deviations.Y measures this micro-displacement to grating chi 208, from Y to grating digital readout 216 send corresponding Y to+5 μ m dfisplacement pulses or Y to-5 μ m dfisplacement pulses, they are noted by forward-backward counter equally, when workbench 113 scans displacement is revised (reduce mended) more next time the deviation of each time displacement is not accumulated.
Change the divider ratio of forward-backward counter, just can change the size of workbench 113 each scanning shift amounts, to adapt to the needs of multiple scanning resolution.
Flat optical fiber scanning phototypesetting platemaking machine of the present invention specifically has following outstanding feature:
1, sweep limits is limited by the stroke of crossbeam and the stroke of workbench only, and the scanning breadth can Reach and split, entirely open or bigger;
2, adopting a plurality of light emitting diodes economic, stable performance is light source, by many light Fine and each light emitting diode is coupled, and realizes a plurality of luminous point solid matters;
3, full width face paraxial imagery everywhere, image planes are planes, the resolution ratio height;
4, the scanning start and stop life sent of phototypesetting platemaking machine receiving computer editing system of the present invention Order and texts and pictures information are moved under the control of the electronic control system of this machine, and is first in high speed PS version The upper scanning of first coating (silver salt photosensitive layer) form sub-image, then plate is sent into video picture system System is processed and can be obtained the PS forme that the confession offset press is used, and has realized from phototypesetting to the plate-making overall process Automation. Phototypesetting platemaking machine of the present invention it is also worth noting that owing to can provide big scanning Breadth, this just can be finished by the printed sheet layout by computer software, replaces traditional craft to join The page or leaf operation improves efficient and the speed of printing and publishing work.
Description of drawings
Fig. 1 .1 is a plate optical fibre scanning and photocomposing plate-making machine shape diagrammatic sketch.Wherein:
The 101st, dial the version motor, the 102nd, manipulator, the 103rd, optical fiber scanning head assembly, the 104th, crossbeam, the 105th, X is to leading screw, and the 106th, X is to stepper motor, and the 107th, X is to guide rail, and the 108th, magazine, the 109th, X is to the grating chi, and the 110th, high speed PS version, the 111st, Y is to guide rail, the 112nd, Y is to stepper motor, and the 113rd, workbench, the 114th, dial a version block, the 115th, lathe bed, the 116th, cassette cover, the 117th, casing, the 120th, optical fiber scanning head, the 121st, column, the 122nd, support.
Fig. 1 .2 is the plate optical fibre scanning and photocomposing plate-making machine structural representation.Wherein:
The 123rd, sucker, the 124th, vavuum pump, the 118th, publish passage, plate enters imaging system from here.
Fig. 1 .3 is the electronic control system block diagram of plate optical fibre scanning and photocomposing plate-making machine.Wherein:
The 215th, operating desk, the 214th, Programmable Logic Controller, the 205th, signal distributor; Scanning monitor 213 is formed by following several: the 422nd, and X is to the drive pulse signal generator, and the 406th, horizontal synchronizing pulse signal generator, the 407th, bit synchronization pulse signal generator, the 404th, comparator, the 402nd, X
1Value presets toggle switch, and the 405th, comparator, the 403rd, X
2Value presets toggle switch, and the 424th, Y is to the drive pulse signal generator, and the 423rd, the worktable displacement control circuit.In addition, the 109th, X is to the grating chi, and the 401st, X is to grating digital readout, and the 208th, Y is to the grating chi, and the 216th, Y is to grating digital readout, and the 106th, X is to stepper motor, and the 112nd, Y is to stepper motor, and the 209th, computer, the 204th, light emitting diode.
Fig. 2 .1 is an optical fiber scanning head assembly diagrammatic sketch.Wherein:
The 201st, bifurcated passes light beam, and the 202nd, porous plate, 203A, 203B are to put as array, the 204th, light emitting diode, the 205th, signal distributor, the 206th, diaphragm, the 207th, object lens.
Fig. 2 .2 is the two-dimentional scanning mechanism schematic diagram.Wherein: the 208th, Y is to the grating chi.
Fig. 2 .3 is the signal distributor basic circuit diagram.Wherein:
The 209th, computer, the 210th, the 8D trigger, 211 is 8 latch, the 212nd, current-limiting resistance, the 213rd, scanning monitor.
Fig. 3 .1 is the fiber bench installation drawing.Wherein:
The 301st, ceramics seat, the 302nd, metal platen, the 303rd, fiber bench, the 304th, aluminium matter radiating block.
Fig. 3 .2 is an optical fiber scanning head schematic diagram.Wherein:
The 305th, last lens barrel, the 306th, following lens barrel.
Fig. 4 .1 is that X is to the scan control circuit block diagram.Wherein:
The 401st, X is to grating digital readout, and the 402nd, X
1Preset toggle switch, the 403rd, X
2Preset toggle switch, the 404th, data comparator, the 405th, comparator, the 406th, alternative data selector.
Fig. 4 .2 is the generation and the control circuit figure of horizontal synchronizing pulse and bit synchronization pulse.Wherein:
407 right and wrong doors, the 408th, counter, the 409th, nor gate, the 410th, phase inverter, the 411st, phase inverter, the 412nd, d type flip flop, the 413rd, with door, the 414th, monostable flipflop.
Fig. 4 .3 is workbench scan control circuit figure.Wherein:
The 415th, monostable flipflop, 416,417,418 are forward-backward counter, and the 419th, phase inverter, 420 right and wrong doors, the 421st, d type flip flop.
Claims (3)
1. phototypesetting platemaking machine of being made up of light source, scanning system and the imaging system of the texts and pictures lattice information modulation that is subjected to computer output is characterized in that:
1.1 optical fiber scanning head and optical fiber scanning head assembly
The optical fiber scanning head is a light source with 8N light emitting diode, here N is a natural number, each light emitting diode respectively has an optical fiber coupling direct with it, the bright dipping end of 8N root optical fiber is pressed the straight line solid matter, form the paraxonic imaging system with object lens, lens barrel etc. again, optical fiber scanning head assembly is made up of M optical fiber scanning head, here M is a natural number, each optical fiber scanning capitiform one-tenth point separately is as array, these points drop on the same straight line as array, apart be the integral multiple of a point as array length each other, this multiple is by the decision of version core size;
1.2 flat scanning mechanism
Y to sweep mechanism by Y to stepper motor, feed screw nut, Y is to guide rail, Y is to the grating chi, compositions such as workbench, Y to stepper motor by feed screw nut drag workbench along Y to the guide rail translation, the position of workbench and displacement are provided to the grating chi by Y, X to sweep mechanism by X to stepper motor, feed screw nut, crossbeam, optical fiber scanning head assembly, X is to guide rail, X is to compositions such as grating chis, optical fiber scanning head assembly connects firmly on the crossbeam and be positioned at above the work top, X also promptly drives optical fiber scanning head assembly to stepper motor by feed screw nut driving crossbeam and moves back and forth to guide rail along X, the point that optical fiber scanning head assembly produces as array drop on Y on the parallel diameter of guide rail, the X of scanning monitor is to controlling by the bit synchronization impulse generator, the horizontal synchronizing pulse generator, X is to drive-pulse generator, X gives to the forward scan starting point and puts switch and comparator, X gives to the reverse scan starting point and puts switch and comparator and form, and the Y of scanning monitor is made up of to drive-pulse generator etc. worktable displacement control circuit and Y to control;
1.3 signal distributor
Form 8 NM position SI PO shift registers by NM 8D trigger, the shift pulse of sending with computer is a common clock, the frequency of this shift pulse is NM a times of bit synchronization pulse frequency, the input of 8 shift registers is received respectively on the 8 single data buses of computer, form 8NM position latch by NM 8 latch in addition, with the bit synchronization pulse is common clock, the 8NM of a latch input is received respectively on 8NM the parallel output terminal of shift register, the 8NM of a latch output is received the negative electrode of 8NM light emitting diode respectively through 8NM current-limiting resistance, and the positive pole of each light emitting diode connects+5V.
2, by the described phototypesetting platemaking machine of claim 1, it is characterized in that:
Horizontal synchronizing pulse produces with data selector, advance to sweep 1B and 2A end that data selector is sent in the starting point pulse, move back and sweep 1A and the 2B end that data selector is sent in the starting point pulse, connect the A/B end of this selector from " scanning advance and retreat " level signal of Programmable Logic Controller, meet the Enable Pin G of this selector from " being ready to " level signal of Programmable Logic Controller, selection result holds the signal of exporting as horizontal synchronizing pulse from 1Y, and the signal of holding output from 2Y is as the last pulse of row.
3, by claim 1 and 2 described phototypesetting platemaking machine, it is characterized in that:
The bit synchronization impulse generator, it is made up of counter etc., from X to grating digital readout output+5 μ m pulses and-5 μ m pulses deliver to two inputs of a NAND gate respectively, the output of NAND gate connects the clock end of counter, the divide ratio of counter is made as L, make rolling counters forward with horizontal synchronizing pulse, counter is exported a pulse at its TC end after receiving L pulse, and this pulse gets the bit synchronization pulse after control gate and monostable flipflop shaping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95117835 CN1067946C (en) | 1995-12-14 | 1995-12-14 | Plate optical fibre scanning and photocomposing plate-making machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95117835 CN1067946C (en) | 1995-12-14 | 1995-12-14 | Plate optical fibre scanning and photocomposing plate-making machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1151938A CN1151938A (en) | 1997-06-18 |
| CN1067946C true CN1067946C (en) | 2001-07-04 |
Family
ID=5081382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95117835 Expired - Fee Related CN1067946C (en) | 1995-12-14 | 1995-12-14 | Plate optical fibre scanning and photocomposing plate-making machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1067946C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103093254B (en) * | 2013-02-19 | 2018-08-03 | 北京弘浩千瑞科技有限公司 | A kind of data processing method suitable for plate printing machine |
| CN103760643B (en) * | 2013-12-30 | 2015-09-09 | 深圳市恒宝通光电子股份有限公司 | A kind of apparatus for assembling of fiber products and assemble method |
| CN108098135A (en) * | 2017-12-16 | 2018-06-01 | 武汉吉事达科技股份有限公司 | The wide more galvanometer head etching laser machinings of filament |
| CN111175951B (en) * | 2020-03-18 | 2021-11-02 | 苏州艾线光电科技有限公司 | Computer flat screen plate making optical system and imaging method |
-
1995
- 1995-12-14 CN CN 95117835 patent/CN1067946C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1151938A (en) | 1997-06-18 |
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