CN100453330C - Image forming device - Google Patents
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- CN100453330C CN100453330C CNB2006100930504A CN200610093050A CN100453330C CN 100453330 C CN100453330 C CN 100453330C CN B2006100930504 A CNB2006100930504 A CN B2006100930504A CN 200610093050 A CN200610093050 A CN 200610093050A CN 100453330 C CN100453330 C CN 100453330C
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Abstract
The present invention aims at raising the control precision for conveying belt in case of temperature variance, and has on the conveying belt one straight line coder comprising straight ruler on the conveying belt and one coder sensor, and one rotary coder comprising one code wheel set on the shaft of the conveying roller and one other coder sensor. The subsidiary scanning motor is controlled with the output signals of these coders in certain relationship. At the same time, one temperature sensor is used in detecting the temperature of the conveying belt. According to the detected motion amounts, the motion amount of the straight line coder relative to the pulses are calculated in the calculating unit, and the temperature change is also reflected in the control amount on the subsidiary scanning motor.
Description
Technical field
The present invention relates to image processing system.In particular, the present invention relates to image processing system with conveyance band conveyance recording medium.
Background technology
As printing agent, facsimile machine, duplicator, the image processing system of printing/fax/duplicating compounding machine, known has, the record head (image forming device) that for example uses the drop head by the record liquid drop that can spue to constitute, and on one side to being recorded medium (hereinafter referred to as " paper ", but this does not also mean that material is limited, and, also used for " recording medium " " transfer materials " with same implication) carry out conveyance, Yi Bian the drop (hereinafter referred to as droplet of ink) that makes record liquid is attached on the paper and carry out image and form (record, printing, seal is write, lettering also uses as the synonym that image forms) ink-jet recording apparatus.
In such ink-jet recording apparatus, institute's allocation of the terribly middle paper of the drop that liquid discharge head spues, if but at this moment, the low words of the conveyance precision of subscan paper feeding (paper feeding precision), will make drop can not hit fixed position, thereby make the quality step-down of image.
Therefore, in general, in the device that uses the conveyance band, use the rotary encoder formed by code wheel (code wheel) and optical sensor that the amount of movement of the conveyance band form with the rotation amount of conveyance rod is detected, and the mobile of conveyance band controlled based on this detected value.Code wheel is installed in conduct and supports on the axle of one the driving rod (conveyance rod) at least two the rod of conveyance band.Described optical sensor is the optical sensor (reading a yard sensor) that is used for reading the infiltration type of code wheel.
In addition, in the image processing system of electrofax mode, as open the spy put down in writing among the 2003-241535, in order to discern the shift position of intermediate transfer belt, be that the sign that will be provided with on transfer belt detects, and, make the revisal information of the shift position of transfer belt being carried out revisal based on this testing result; And the rotation status to driving shaft also detects, and based on this testing result, makes the revisal information to the rotation status of driving shaft, then, according to these information, the motor that drives transfer belt is controlled.
Summary of the invention
The problem that invention will solve
But, as above-mentioned ink-jet recording apparatus, the occasion that the amount of movement of conveyance band is detected as the amount of spin of conveyance rod, owing to can not directly detect from drive source to the wheel the conveyance rod or the accumulated error of band and conveyance rod and the amount of movement that makes the conveyance band that paper moves, so be difficult to carry out the control of high-precision stop position.
In addition, open in the device of putting down in writing among the 2003-241535 the spy, even can control, still the speed that the conveyance band is stabilized, in the occasion that drives and must carry out high-precision stop position control intermittence that resembles the conveyance band of ink-jet recording apparatus, also be inapplicable.
Thus, the applicant has proposed a kind of image processing system earlier, among this image processing system, be provided with output according to first encoder of the signal of conveyance Tape movement amount and output second encoder, and carry out the mobile control of conveyance band according to the output signal of first encoder and second encoder and the dependency relation of each output signal according to the signal of the rotation amount of rod.But even adopting this structure, owing to be output as benchmark with first encoder, when generation conveyance band was flexible, the dependency relation of the signal of the output of first encoder and second encoder will depart from, thereby makes the paper feeding deterioration in accuracy.
The present invention produces in view of above problem.Promptly the purpose of this invention is to provide a kind of can be unchangeably the image processing system of conveyance paper accurately.
In order to solve above-mentioned problem, image processing system of the present invention,
Have output according to first encoder of the signal of the amount of movement of conveyance band and output second encoder according to the signal of the rotation amount of rod,
Have the control device that moves of controlling the conveyance band according to the dependency relation of the output signal of first encoder and second encoder and each signal,
Checkout gear with the temperature that detects the conveyance band,
According to the testing result of this checkout gear, the controlled quentity controlled variable that moves about the conveyance band that undertaken by control device is carried out revisal.
At this, with the amount of movement that is equivalent to 1 pulse of first encoder output as L, with the amount of movement that is equivalent to 1 pulse of second encoder output as R, with the L/R of the coefficient correlation of expression L and R as coefficient correlation α, to be equivalent to the conveyance band " specifying the computed carrier amount umber of pulse " of fixed amount of movement as N, when (still with the umber of pulse n2 of the umber of pulse n1 of first encoder output and the output of the 2nd encoder, n2 by 0 to α less than integer) when making the conveyance band only move fixed amount of movement, preferred following formula is set up.
N＝α·n1+n2
In addition, preferably be provided with a kind of like this device, this device stores, the information corresponding to the variation of temperature amount about the conveyance band of possessing in advance.Further, preferably checkout gear is arranged on the guiding parts that is led in surface in the conveyance band.And the sensor of preferred detecting unit and formation the 1st encoder is configured to one.Further, first encoder is a linear encoder; The 2nd encoder is a rotary encoder.
The effect of invention
Image processing system of the present invention
Have output according to first encoder of the signal of the amount of movement of conveyance band and output second encoder according to the signal of the rotation amount of rod,
Have the control device that moves of controlling the conveyance band according to the dependency relation of the output signal of first encoder and second encoder and each signal,
Checkout gear with the temperature that detects the conveyance band,
According to the testing result of this checkout gear, the controlled quentity controlled variable that moves about the conveyance band that undertaken by control device is carried out revisal.
So, can when carrying out high-precision paper feeding control,, control thereby can carry out long-term stable high-precision paper feeding by to because revisal is carried out in the variation of the flexible paper feeding distance of bringing of the conveyance band that variations in temperature produces.
Description of drawings
Fig. 1 is the schematic diagram that presentation video forms the unitary construction of device.
Fig. 2 is the image forming part of image processing system of the present invention and the plane key diagram of subscan conveying unit.
The side illustration figure of Fig. 3 image processing system of the present invention.
The inboard key diagram of the conveyance band of Fig. 4 image processing system of the present invention.
Fig. 5 is the stravismus key diagram of the engine portion of image processing system of the present invention.
Fig. 6 is the synoptic diagram of the control part of image processing system of the present invention.
Fig. 7 has described the driving control of the subscan motor in the control part and the block diagram of the function that revisal is handled.
Fig. 8 is the figure that the output of the encoder that is used for subscan is described.
Fig. 9 is the temperature sensor of image processing system of the present invention and the key diagram that encoder detector becomes one.
The specific embodiment
Hereinafter with reference to accompanying drawing embodiments of the present invention are described.Below will an example summary of image processing system of the present invention be described with reference to accompanying drawing 1-5.Fig. 1 is the schematic diagram that presentation video forms the unitary construction of device.Fig. 2 is with the image forming part of device and the plane key diagram of subscan conveying unit.Fig. 3 is the side illustration figure with device.Fig. 4 is the section key diagram of the inboard of expression conveyance band.Fig. 5 is the oblique view with the engine portion of device.
In the inside of image forming device body of the present invention (hereinafter to be referred as body) 1 (in the basket), while there is the conveyance of carrying out paper to carry out image forming part 2 that image forms and the subscan conveying unit 3 of carrying out the paper conveyance etc.Be provided with in the bottom of body 1 and comprise the sheet feed section 4 that contains the paper supply cartridge, paper 5 is supplied with one by one from this sheet feed section 4.On one side by subscan conveying unit 3 with paper 5 conveyances to the position relative with image forming part 2, one side sprays to paper 5 by image forming part 2 with drop and forms desired image.After this, under situation about being printed on one side, paper 5 is discharged to paper on the row's paper disc 8 that is located at above the image forming device body 1 by row's paper conveying unit 7; Under the situation of printed on both sides,, paper is delivered to the unit, two sides 8 that is provided with in the bottom of body 1 in row's paper conveying unit 7 midway, in this conveyance of overturning, be sent to subscan conveying unit 3 again, behind the image of formation two sides, be discharged from the outer row's paper disc 8 of machine.
In addition, on the top of this image forming device body 1 (top of row's paper disc 8), as the input system of view data (printed data), be provided with can reading images image reading unit (scanner) 11.This image reading unit 11 comprises, by the scanning optics of light source 13 and speculum 14,16,17 compositions.By this optical system, the image that can dock the original copy on the contact glass 12 scans, the original image quilt that was scanned is read with the form that picture signal adds at the image read element 20 of the configuration of lens 19 back, and the picture signal of reading in is by numberization and be carried out the image processing.The printed data that image is handled just can print.
Further, the view data of using at image forming part 2 (printed data) can be from the information processing device of the PC of outside etc. with network by cable, the image read-out of image reading apparatus etc., and the camera head of digital-code type camera etc. obtains.
Printing on the car 23, be loaded with the record head of forming by the discharge head of the versicolor drop that can spue.Printing car 23 is moved on main scanning direction, and subscan conveying unit 3 moves paper 5 on sub scanning direction.Paper feeding like this, on one side makes record head 24 spue drop on one side and forms image.This is a fabric shuttle-type, still, also can use the record head of line style.
On the other hand, as shown in Figure 1, body has and black (Bk) is housed, dark green printing ink (C), magenta ink (M), the print cartridge of all kinds 26 of Yellow ink (Y) respectively.They all can easily load and unload, and printing ink of all kinds can be fed to the capsule 25 from print cartridge 26.In addition, the printing ink of black is fed in 2 little print cartridges from a print cartridge 26.
On the other hand, record head 24 has the pressure apparatus that the printing ink in the printing ink stream is pressurizeed.Promptly use piezoelectric element to make and form the jolting plate distortion of the wall of printing ink stream, thereby the volume of printing ink in stream changed, and spued, Here it is so-called piezo-electric type.Perhaps, use heating resistor, make printing ink become bubble, and droplets of ink is spued, promptly so-called hot type with pressure with the heating of the printing ink in the printing ink stream.Also having a kind of is to constitute the jolting plate and the configuration of electrode surface opposite of the wall of printing ink stream, to make the jolting plate distortion with the electrostatic force that takes place between jolting plate and the electrode, thereby make the volume of printing ink in the printing ink stream change and be spued.
The non-lettering of side district in the scanning direction of printing car 23, as shown in Figure 2, the kilter for the nozzle of keeping recovery record 24 disposes and keeps recovery device 121.This is kept recovery device 121 and comprises as follows:
5 lids of preserving moisture are used for the jet face of each nozzle of 5 record heads (24) is covered, and they are 122k2,122k1,122c, 122m, 122y (be called to preserve moisture when not needing distinct color, with them and cover 122);
1 attraction is with covering 123;
Scrape wiping board 124, the jet face of the nozzle that is used to swipe;
The empty receiver 125 that sprays is used for receiving the ejection drop of not participating in record (image formation).
Further, at the nonprinting region of the scanning direction opposite side of printing car 23, as shown in Figure 2, has the sky spray receiving-member 126 of the ejection (empty spray) of the drop of not participating in record (image formation) that receives 5 record heads 24.In this sky spray receiving-member 126, have and record head 24 corresponding 5 opening 127k1,127k2,127c, 127m, 127y (, only being called opening 127) not needing to indicate under the situation of color.
In subscan conveying unit 3, by subscan motor (DC brushless motor), and with timing belt 132 and regularly rod 133 be media, make 32 rotations of conveyance rod, thereby conveyance band 31 carried out around rotation along the conveyance direction (sub scanning direction) of paper.In addition, conveyance band 31 can be a double-layer structure, be that one deck is the top layer as the paper adsorption layer that is formed by pure resin material (for example pure ETFE material) of carrying out not that resistance adjusts, another layer can be with the top layer same material carried out the nexine (middle resistive layer, bottom) that resistance is adjusted with carbon black.But conveyance band 31 is not limited to this, and it also can be individual layer or three-decker.
In addition, between driven rod 33 and the charging rod 34, the device (usefulness is the polyester scraper plate) that the paper scrap of conveyance band 31 surface attachment is removed is arranged here) 135 and the brush 136 that disappears that the electric charge on conveyance band 31 surfaces is removed.
Moreover, be equipped with on the axle 32a of conveyance rod 32 and have high-resolution code wheel 137, be provided with by the optical sensor 138 by permeability that detects the slit 137a that forms on this code wheel, this code wheel 137 and code sensor 138 constitute second encoder, just rotary encoder.
In addition, surface in the conveyance band 31 (face that joins with the outer circumference surface of conveyance rod 32) has straightedge rule 231 as shown in Figure 4, and is provided with by the reflection type optical sensor (encoder detector) 232 that reads this straightedge rule 231.This straightedge rule 231 constitutes first encoder, i.e. linear encoder with encoder detector.
In addition, straightedge rule 231 can be with aluminum evaporation attached to surface in the conveyance band 31, and then with laser a part is evaporated, and the zebra apperance that forms.And this straightedge rule 231 is arranged on the place that does not hinder the reflection type optical sensor to read.Further, with encoder detector 232 adjoiners, be provided with detect be located at conveyance band 31 in the seam sensor 233 of seam of straightedge rule on surface.
Like this, guide member 35, as shown in Figure 5, a side that will contact with the conveyance band is set to cancellated structure, therein, disposes the temperature sensor of being made up of the thermistor of the temperature that detects conveyance band 31 (detector) 234.So, the detector configurations of the temperature by will detecting conveyance band 31 on (surperficial channeling conduct in to the conveyance band) guide member 35, thereby can more correctly detect the variation of temperature of conveyance band.
That is to say, because even the environment temperature of image forming device body changes, the temperature of conveyance band also can not change immediately (following of temperature is little), thus, even detect the variations in temperature in the image processing system, can not correctly detect the temperature of conveyance band, consequently, even carry out as temperature revisal of the present invention, the result of revisal also has and the inconsistent possibility of actual variations in temperature.To this, in the present embodiment, the conveyance band is guided, externally the cancellated structure position of the guide member 35 that seldom enters of gas configuration Temperature Detector, just can correctly detect the temperature of conveyance band 31, thereby temperature revisal afterwards just comes right also.
At this, though, temperature sensor 234 and the optical sensor (code sensor) 232 that constitutes first encoder (linear encoder) are configured in the different position of guiding parts 35.But, as shown in Figure 9, not only temperature sensor 234 and encoder detector 232 can be configured on the same circuit board 235 and form a unit (integrated), incorporate two sensors can also be configured in the guiding parts 35.So, the temperature of straightedge rule 231 parts of conveyance band 31 just can more correctly be detected.
Paper supply rolls 42 and friction plate 43, is used for paper 5 being separated one by one and sending;
And, in order to receive and keep paper more at sheet feed section 4, be provided with hand paper feed tray 46 and from 46 with paper 5 one by one the manual feed of paper feeding roll 47.In addition, the following paper supply cartridge of using whenever necessary of device and for described later from unit, two sides 10 with paper 5 roller 48 of conveyance in addition.Paper supply rolls 42, location rod 44, manually paper supply rolls 47, conveyance rolls 48 etc. to give the parts of subscan conveying unit 3 conveyance paper be that to be media with the electromagnetic clutch that not have in the drawings to represent driven by the stepper motor (drive unit) 49 of HB type.
Row's paper conveying unit 7 comprises:
3 conveyance rod 71a, 71b, 71c (in the time need not distinguishing, be called for short conveyance rod 71) are used for the paper 5 that conveyance separated by the disengaging pawl 38 of subscan conveying unit 3;
Following guide part 73 and last guide part 74 are used for to being led by the paper of conveyance between row's paper rod 71 and the accelerator;
The upset rod to 77 and upset row's paper rod to 78, be used for making it literal downwards, then on the row's of being sent to paper disc 8 with from guide part 73 down and go up conveyance comes between the guide part 74 paper 5 by upset path 81 (the first conveyance passage) upset.In addition, will between following guide part 73 and last guide part 74, being called conveyance passage 70 by the path of conveyance paper 5.
Outlet one side at conveyance passage 70, be provided with bifurcated mechanism 60, so that switch the first row's paper passage 81 that paper is sent to the row's of upset paper by passage, perhaps be sent to second row's paper passage 82 of directly arranging paper (row is to direct row's paper disc 181), perhaps the unit, two sides 10.
Unit, two sides 10 comprises:
Vertical conveying unit 101a, its formation is included paper 5 in from the side of device body 1, and to the vertical two sides conveyance passage 90c of following conveyance;
Horizontal conveying unit 101b, its formation is followed vertical conveyance passage 90c, paper is carried out the horizontal conveyance passage 90a and the direction conversion conveyance passage 90b of horizontal conveyance;
Vertical conveying unit 101a and horizontal conveying unit 101b constitute one.
In vertical two sides conveyance passage 90c, the two sides inlet rod with paper 5 conveyance downwards that conveyance is come is to 91 and paper 5 drawn in the conveyance rod of horizontal conveyance passage 90a to 92; In horizontal conveyance passage 90a, have 4 pairs of two sides conveyance rods to 93; At upset conveyance passage 90b, have the right two sides outlet rod 94 of conduct upset rod and 3 pairs of two sides conveyance rods to 95, they will overturn from the paper 5 that horizontal conveyance passage 90a sends here, and carry out paper supply once more.
In addition, also be provided with and switch bifurcated plate 96, and it can be shaken.This bifurcated plate 96 is used for the conveyance passage of paper 5 is switched, promptly switch to the passage of the paper 5 of upset carrying channel 90b from horizontal conveyance path 90a, or from upset passage 90b to the conveyance rod to 48 switch for the passage of paper supply again.Bifurcated plate 96 can be from Fig. 1 the position of the represented side of overturning of solid line to the position of one side of paper supply once more shown in the dotted line, shake.
The paper of sending from unit, two sides 10 5 is admitted to aforesaid conveyance and rolls 48, and then is sent to location rod 44.
Thus, the paper of sending here from paper supply cartridge 41, manual feed tray 46, the unit, two sides 10 of above-mentioned sheet feed section 45 by conveyance to the location during rod 44, the conveyance rod 32 of subscan conveying unit 3 and press nip drum 36 and the location rod between, paper 5 bend (contraction), for back tension of preventing paper etc., as shown in Figure 1, be provided with and open and close guide plate 110, and it can be shaken.
When paper 5 is delivered to subscan conveying unit 3 from locating rod 44, this switching guide plate 110 position from figure is shaken by the direction of arrow, paper 5 is led, paper 5 arrives the moment of subscan conveying unit 3, open and close guide plate and return to state shown in the figure, so, following a piece of paper forms case of bending and just becomes possibility.
Further, in this image processing system, in order to carry out individual manual paper supply, as shown in Figure 1, in a side of device body, be provided with the plate 141 of individual manual paper supply, it can be opened and can close corresponding to device 1.When carrying out individual manual paper supply, individual sheet feed stacker 141 edge imaginary lines were as shown in the figure fallen.Like this, the paper of sending into from individual manual sheet feed stacker 141 5 on open and close guide plate 110, be directed directly sending into the conveyance rod 32 of subscan conveying unit 3 and by nip drum 36 between, thereby directly insertion.
On the other hand, can directly directly arrange paper, be provided with at the opposite side of device body 1 and open and close possible direct row's paper disc 181 with the literal form that makes progress in order to make the paper 5 that has formed image thereon.Opened by arranging paper disc, in row's paper conveying unit 7, paper 5 is sent by last guide part 74 and following guide part 73, through directly arranging paper passage (second row's paper passage) 82, directly is discharged on the paper disc 181.
Thus, occasion that can not the curve paper feeding when using OHP or ground paper just can be come individual paper supply by individual manual feed tray 141, and until direct row's paper disc 181, can be made the paper rectilinear motion.Certainly, the situation of common paper also can be carried out individual direct paper supply and directly be arranged paper.
Then, with regard to the summary of the control part of image processing system, describe with reference to the block diagram of Fig. 6.
CPU301；
ROM302 is wherein storing the computer program carried out by CPU and other fixed data;
RAM303, its temporary transient storing image data etc.;
Non-volatile memory (NVRAM) 304 is even temporary transient outage also can keep data;
ASIC305, it carries out various signals to view data handles, the processing of scrambling transformation and other in order to carry out the discrepancy Signal Processing of the whole control of device.
In addition, also be provided with at this control part 300
Exterior I/F311, be used for and main frame between carry out receiving of data and signal;
Record head drive control part 312 has the recording head driver that drives the control record head;
Main scanning driver (motor driver) 313 drives making the main scan motor 27 of printing car 23 motion scans;
Paper supply drive division 315 drives paper supply motor 49;
Row's paper drive division 316 reaches 79 to row's altar of each row's paper rod of the row of driving paper portion 7 and drives;
Two sides drive division 317, be used for to the two sides of each rod of driving unit, two sides 10 again paper supply motor 99 drive;
Recovery system drive division 318 is used for driving keeping and recovers motor 129, and motor 129 drives to keep and recovers mechanism 121;
AC bias voltage supply unit 319 is used for supplying with the AC bias voltage to charging rod 34.
Further, control part 300 also comprises:
Electromagnetic component class drive division, it is used for driving above-mentioned switching guide plate electromagnetic component 113, various electromagnetic components (SOL) classes 321 such as shutter door electromagnetic component 150;
In addition, the signal by the temperature of the detected above-mentioned conveyance band 31 of temperature sensor 234 also is imported into master control part 310.Other sensor detection signal also is transfused to master control part 310, but does not draw in the drawings.In addition, master control part 310 also will itself and be provided with on the device body comprise that numerical key, printer begin to carry out the reception of various keys inputs and the output of various expressions between the operation/expression portion 327 of the various keys of key etc. and various announcers.
Further, in master control part 301, input from the signal (pulse) of linear encoder (the 1st encoder) 401 outputs that constitute by above-mentioned straightedge rule 231 and optical sensor (encoder detector) 232 and, from the signal (pulse) of rotary encoder (the 2nd encoder) 402 outputs that constitute by above-mentioned code wheel 137 and optical sensor (encoder detector) 138.Master control part 310 according to the dependency relation of these output signals and each output signal, and is an intermediary with subscan drive division 314, and subscan motor 131 is driven control.Thus, be media with conveyance rod 32, conveyance band 31 is moved.Meanwhile, testing result according to said temperature sensor 234, dependency relation to each output signal of linear encoder and rotary encoder is carried out revisal, thus, carries out the controlled quentity controlled variable of the subscan device motor 131 that drives conveyance band 31 is carried out the processing of revisal.That is to say, this master control part 301 be control device be again compensating device.
Below, will form the image of the image processing system of such formation and move in addition simple explanation.By applying a high alternating voltage that is chief and vice utmost point square wave for charging rod 34 from AC bias voltage supply unit 319.Thus, because the insulating barrier (top layer) of charging rod 34 and conveyance band 31 joins, so on 31 top layer, conveyance direction corresponding to conveyance band 31 is applied with positive and negative charge, by the form with mutual band shape thus, on conveyance band 31 with fixed charged amplitude charged, form unbalanced electric field.
So, if paper 5 is by from sheet feed section 4, manually paper supply 46, unit, two sides 10, individual manual feed tray 141 etc. are delivered to conveyance rod 32 and by between the nip drum 36, when producing on the conveyance band 31 of unequal electric field owing to the formation of positive and negative charge, then paper 5 can be according to the direction moment split pole of electric field, thereby be adsorbed on the conveyance band by Electrostatic Absorption power, and along with moving of conveyance band 31 by conveyance.
Afterwards, when conveyance band 31 carries out intermittent conveyance with paper 5, corresponding with printed data, the drop that record head 24 will write down liquid is sprayed onto on the paper 5 and forms image (printing), the separated pawl 38 of front end that has formed the paper 5 of image thereon separates from conveyance band 31, by row's paper conveying unit 7 according to circumstances, is discharged to paper disc 8 or directly arranges on the paper disc 181, perhaps conveyance forms with the image that carries out another side to unit, two sides 10, arranges paper then.
Below, will the driving control of the subscan motor of this image processing system be illustrated with reference to Fig. 7 and Fig. 8.Fig. 7 has described the driving control of the subscan in the master control part 310 and the block diagram of the function that revisal is handled.Fig. 8 is also to be key diagram for the output of relevant encoder that subscan is described.
On the other hand, this is calculating part 405 relatively, obtains leaving in the velocity location desired value information in velocity location desired value (profile) storage part 406.This comparison calculating part 405 is handled speed that synthetic portion 404 obtains and the composite signal of position is compared with the velocity location desired value information of depositing with these from signal velocity location desired value storage part 406, thereby the deviation of target location and present position is calculated.
Then, according to the deviation that obtains in calculation portion 405 relatively, PID control calculating part 407 carries out PID and calculates and generate pwm signal.Being 407 pairs of PID control calculating parts carries out PID control (ratio, integration, differential) from the deviation of calculation portion 405 relatively, calculates controlling value.At this, with subscan motor 131 as the parts that drive by PWM (Puls Width Modulation) control, 407 pairs of deviations of PID control calculating part are carried out PID control, obtain the duty ratio of PWM, give motor driver 408, subscan motor 131 is driven with PWM control with the duty ratio of this PWM, thus, conveyance band 31 is moved, and the moving target amount of movement with target velocity, thereby be driven to the position of target.
The driving control of the subscan motor that will carry out the output and their dependency relation of this output based on linear encoder, rotary encoder below, promptly the mobile control of conveyance band object lesson is illustrated with reference to Fig. 8.
Moving at the beginning of the conveyance band that carries out owing to the rotation of conveyance rod 32 will be exported from the output of the linear encoder shown in linear encoder 401 output maps 8 (a) and from the rotary encoder shown in rotary encoder 402 output maps 8 (b).At this, as linear encoder 401, the preferred machine that uses with the above resolution ratio of 100LPI; As rotary encoder 402, preferably use more than the 300LPI machine that 4800CR is above.
In this occasion, the computed carrier amount of the resolution ratio of linear encoder 401 energy direct representation conveyance band 31.At this, as the resolution ratio of linear encoder 401, for example be 150LPI, then the computed carrier amount of the conveyance band of being worked as by 1 pulsion phase of linear encoder 401 output is 169.3 μ m.
On the other hand, the computed carrier amount of 1 pulsion phase of the rotary encoder 402 conveyance band 31 of working as by 1 week of rotation suitable umber of pulse and the diameter of conveyance rod 32 and the thickness of conveyance band 31 decide.Constitute the resolution ratio high more (slit separation is narrow more) of the code wheel 137 of rotary encoder, the external diameter of wheel 137 is big more, and 1 all suitable umber of pulses are just many more.In addition, 32 diameter of conveyance rod is more little, and the computed carrier amount of the conveyance band that 1 pulsion phase of rotary encoder 402 is worked as is just few more.
At this, with the resolution ratio of code wheel 137 as 600LPI, it is doubled processing (in this example, 4 multiplications), make it to be 2400LPI, the pass of the diameter of code wheel 137 and conveyance rod 32 (being included in the thickness of band interior) is 4: 1, so the rotary encoder 402 that is converted on the conveyance band is to be multiplied by 4, be 2400LPI * 4=9600LPI, the computed carrier amount of being with that 1 pulsion phase of rotary encoder output is worked as is about 2.65 μ m.
Therefore, if the coefficient of dependency relation that will represent the pulse that pulse that linear encoder 401 is exported and rotary encoder 402 are exported is as coefficient correlation α, the distance that 1 pulsion phase of linear encoder 401 outputs is worked as is that (amount of movement) is as L, the distance (amount of movement) that 1 pulsion phase of rotary encoder 402 output is worked as is as R, then coefficient correlation α=L/R.
That is to say, as N pulse of rotary encoder 402 outputs, as make the conveyance Tape movement, the relation of the distance R that distance (amount of movement) L that 1 pulsion phase of linear encoder 401 outputs shown in Figure 8 is worked as and rotary encoder 402 outputs 1 pulsion phase are worked as, because dependency relation α is (9600LPI/150LPI)=64, so, L=64 * R.As with the umber of pulse of linear encoder 401 as n1, as n2 (=0 to 64), the amount of movement of the N pulse of rotary encoder 402 can be represented with following formula with the mantissa of rotary encoder 402 umber of pulses:
N＝64×n1+n2······(1)
As this amount of movement with above-mentioned concrete example is represented, then be 2.65 μ m * N=169.3 μ m * n1+2.65 μ m * n2.For example, will be equivalent to conveyance band 31 decide amount of movement " computed carrier amount specific pulse number " as N=1000 pulse (amount of movement 2.65mm), n1=15 then, n2=40.That is, after the count value n1 of the output pulse of linear encoder 401 became " 15 ", subscan motor 131 rotation drove so that conveyance band 31 continues to move, till the count value n2 " 40 " of the output pulse of rotary encoder 402.
At this,, be the ratio of amount of movement L, as this relation being represented with coefficient correlation α formula (1) just can be represented with formula (2) with R because " 64 " in the above-mentioned formula (1) as mentioned above.
N＝α·n1+n2······(2)
So, if ask for linear encoder 401 and the umber of pulse n1 of rotary encoder 402 and the words of n2 that make conveyance band 31 move a certain amount of movement, the coefficient correlation α (is 64 at this) that at first umber of pulse N (it is decided to be 1000 pulses) is used as the ratio of L and R removes, with its merchant's (, being 15.625) integer part (15) umber of pulse n1 as linear encoder 401 at this.Then, with formula 2, carry out the calculating of (N-α n1), ask for rotary encoder 402 umber of pulse (at this, n2=1000-64 * 15=40).
That is to say, when calculating amount of movement, the umber of pulse n1 (being not more than the value of amount of movement) of the linear encoder 401 that decision resolution ratio is low earlier, decision is equivalent to the umber of pulse n2 of the high rotary encoder 402 of the resolution ratio of mantissa's (remaining amount of movement) then.When for example being 5.3mm as amount of movement, because the umber of pulse of suitable rotary encoder 402 is 2000 therewith, so the integer part of the merchant with 2000/64 " 31 " is as the umber of pulse n1 of linear encoder 401, then the umber of pulse n2=2000-64 of rotary encoder 402 * 31=16.
At this, the appointment of amount of movement is that the umber of pulse N with rotary encoder 402 carries out.But in fact, the output of employed rotary encoder 402 only is mantissa (0 to 63).The major part of amount of movement is based on the output of linear encoder 401 and controls.In above example, because 1/64 of amount of movement (distance) L that suitable amount of movement (distance) R of 1 pulse of rotary encoder 402 outputs is 1 pulsion phases of linear encoder 401 outputs to be worked as, so the shared ratio of rotary encoder 402 is very little in the amount of movement of the reality of conveyance band, the influence that can lower part precision thus.
Promptly, in the occasion of only carrying out the amount of movement control of conveyance band with the output of rotary encoder 402, will be through conveyance rod, conveyance band, these stages of paper, so, the change of the diameter of the precision of conveyance rod itself and the rod that produces owing to temperature, and the stack of the equal error such as flexible of the precision of conveyance band itself and the band that produces owing to temperature, the error that will produce between the amount of movement of the output of rotary encoder and actual paper becomes big danger.
To this, owing to disposed the linear encoder that can directly detect the amount of movement of conveyance band, so the actual amount of movement that more directly detects paper becomes possibility.But, owing to only can not obtain sufficient resolution ratio,, just can realize coming amount of movement is controlled with higher precision so pass through the output of itself and rotary encoder combinedly with the output of linear encoder.
In addition, in the above description, L=R * 64 have been supposed, but on reality is used, be to make conveyance rod 32 carry out the integer rotation, and make the revolution of its rotation approach to make conveyance band 31 to move the revolution in a week as far as possible, obtain the ratio (L/R=coefficient correlation α) of straight line/rotation therefrom.In this occasion, make conveyance rod 32 integers rotate and obtain the reason of L/R ratio, be in order to eliminate influence in the eccentric and swing of conveyance rod in 1 week.1 week rotation institute of conveyance rod 32 signal of rotary encoder through signals and the linear encoder of conveyance band accordingly is " 64 " than (L/R) in theory, but actually, is non-integral coefficient correlations such as " 64.2 " for example.This is the part precision owing to straightedge rule and conveyance rod etc., and variation of temperature causes.
But, like this occasion of carrying out the mobile control of conveyance band 31 according to the dependency relation (coefficient correlation α) of the output of the output of linear encoder 401 and rotary encoder 402 and these outputs is to be benchmark with the straightedge rule 231 that constitutes linear encoder 401.
Therefore,, obtain after the L/R,, just can calculate the distance of 1 pulse of rotary encoder 402 as adopting ideal value L=169.3 μ m in the occasion of not considering the temperature revisal.But, in fact, because conveyance band 31 also is subjected to Temperature Influence, so if conveyance band 31 stretches or shrinks owing to temperature, then the amount of movement L of 1 of linear encoder 401 pulsion phase conveyance band 31 of working as also changes.
So, in the present embodiment, as shown in Figure 7, can be in advance by experiment, as the information to the variable quantity of variations in temperature of relevant conveyance band 31, for example, with in fiducial temperature (at this, be 23 ℃) time amount of movement Lref be benchmark, ask for the percentage elongation (C) of unit temperature and it be stored in this percentage elongation storage portion 410.Based on difference and the percentage elongation C of the testing result (detected temperature T) of temperature sensor 234 and itself and fiducial temperature Tref, carry out the calculating of L=Lref+Lref * (Tref-T) * C.This calculating (i.e. the calculating of the amount of movement L that works as at 1 pulsion phase of the linear encoder 401 of detected temperature) is carried out in amount of movement calculating part 411.In addition, percentage elongation storage part 410 can be made of the ROM302 of master control part 310 or NVRAM304 etc.
Like this, the corresponding amount of movement L of 1 pulse of the linear encoder 401 that calculates at this amount of movement calculating part 411 is sent to comparison calculating part 405.Compare calculating part 405, as mentioned above, the velocity location desired value information of handling speed that synthetic portion 404 obtains and positional information (composite signal) and harvesting velocity location desired value storage portion 406 from signal is compared, and deviation is calculated.At this moment, from amount of movement calculating part 411 obtain with 1 pulsion phase of linear encoder 401 when 1 pulsion phase of the corresponding rotary encoder 402 of amount of movement L as amount of movement R, calculate carrying out revisal corresponding to the umber of pulse n1 of the linear encoder 401 of target deviation (target amount of movement) and rotary encoder n2.Thus, the deviation of wanting revisal corresponding to the elongation or the shortening amount of the conveyance band 31 that produces owing to temperature is sent to PID control calculating part 407, thereby corresponding to the elongation or the shortening amount of the conveyance band 31 that causes owing to temperature, controlled quentity controlled variable is by revisal.
That is to say, in the present embodiment, for the revisal of carrying out to carry out owing to variation of temperature, percentage elongation (expansion and contraction) C that will be changed by the unit temperature of the conveyance band of obtaining from experiment 31 asks for the variation of amount of movement (distance) L that works as 1 pulsion phase of the linear encoder 401 of benchmark and the amount of movement R that works as than 1 pulsion phase of the rotary encoder of asking for 402 from L/R, so, set the umber of pulse n1 of the linear encoder that is equivalent to specify computed carrier amount (umber of pulse N) and the umber of pulse n2 of rotary encoder.
For example, at 23 ℃ benchmark amount of movement Lref=169.3 μ m, percentage elongation is as C, and then the amount of movement L that works as of 1 pulsion phase of the linear encoder 401 when detected temperature T ℃ can obtain with following formula.
L＝Lref+Lref(T-23)×C
At this, regulation coefficient correlation α=L/R=63.2,1 pulsion phase equivalent R of rotary encoder 402 asks with following formula.
R＝L/63.2＝{Lref+Lref(T-23)}/63.2
At this, such as described above, calculate, specify computed carrier amount/R=umber of pulse N, set the umber of pulse n1 of linear encoder 401 and the umber of pulse n2 of rotary encoder 402 based on this umber of pulse N and coefficient correlation α then, thus, just can be with the conveyance band 31 that produces by variations in temperature flexible, thereby the variation of the amount of movement that brings is reflected in the controlled quentity controlled variable of subscan motor 131 of driver.So, although variation of temperature is arranged, also can carry out high-precision paper feeding control.
In other words, the present invention is according to temperature, to calculate the amount of movement L of linear encoder, and according to it controlled quentity controlled variable is carried out revisal.Promptly in the mode (W approach sensor) of using linear encoder and rotary encoder, the straightedge rule that obtains as the output of linear encoder is a benchmark, and change also can be corresponding for temperature like this.Here, with the linear expansion coefficient of conveyance band as β, variations in temperature is as Δ T, detected temperature (mensuration temperature) is as T, fiducial temperature is decided to be 23 ℃, and the amount of movement of initial stage at straightedge rule is L0 (in above-mentioned example, Lref=169.3 μ m), amount of movement after the variations in temperature is as L, and then revisal calculating formula is as follows.
L＝L0×(1+β×ΔT)＝L0×{1+β×(T-23℃)}
In addition, in the present embodiment, in advance the percentage elongation of the unit temperature of conveyance band is stored, the difference of detected temperature and fiducial temperature is multiplied by percentage elongation, further be multiplied by benchmark amount of movement Lref again, calculate the suitable amount of movement L of 1 pulse when this detected temperature therefrom, but, as will be corresponding to the value of the amount of movement L of 1 pulse of temperature tabulating and stored, just can be by from form, according to detected temperatures, read the amount of movement L after the corresponding temperature revisal, accelerate thereby can make to handle.
In addition, to be prepared according to the velocity location desired value of the plural number of temperature, so just can be according to detected temperature, change employed velocity location desired value, according to temperature controlled quentity controlled variable is carried out revisal thus, and also the augmenting factor of reading of going up according to temperature on duty can be carried out revisal from velocity location Place object value, just can carry out revisal foundation temperature controlling amount with this.
In a word, when temperature during with linear fashion or stage variation, its result is that the driver that drives the conveyance band is carried out revisal.In other words, even if temperature changes exactly, as long as can the computed carrier amount of conveyance band not changed by the revisal controlled quentity controlled variable, any structure all can adopt.
In addition, in the above-described embodiment, the example of the image processing system of multi-functional by being applicable to (MFP) is illustrated, but equally also is suitable for for printer and facsimile machine.And, also be applicable to the image processing system that uses printing ink record liquid in addition.
Claims (6)
1. an image processing system wherein is recorded medium by the conveyance band conveyance of being supported by at least 2 rods, is recorded on the medium described, thereby forms image by the drop that writes down liquid from the nozzle ejection of record head, it is characterized in that, wherein,
Have output according to first encoder of the signal of the amount of movement of described conveyance band and, output is according to second encoder of the signal of the rotation amount of described rod,
Have the control device that moves of controlling the conveyance band according to the dependency relation of the output signal of the output signal of the output signal of the output signal of described first encoder and second encoder and first encoder and second encoder,
Checkout gear with the temperature that detects described conveyance band,
According to described checkout gear detected result, the controlled quentity controlled variable that moves about the described conveyance band that undertaken by described control device is carried out revisal.
2. image processing system according to claim 1, it is characterized in that, with the amount of movement that is equivalent to 1 pulse of the output of described first encoder as L, with the amount of movement that is equivalent to 1 pulse of described second encoder output as R, to represent that the dependency relation L/R of L and R is as coefficient correlation α, to be equivalent to described conveyance band " the computed carrier amount specific pulse number " of fixed amount of movement as N, that described conveyance band is only moved is described when being decided amount of movement as the umber of pulse n2 that is exported with the umber of pulse n1 and the 2nd encoder of the output of described first encoder, N=α n1+n2 sets up, wherein, n2 be 0 to α less than integer.
3. image processing system according to claim 1 and 2 is characterized in that, comprising the device corresponding to the information of variation of temperature amount that stores the relevant conveyance band possessed in advance.
4. image processing system according to claim 1 and 2 is characterized in that, described checkout gear is arranged on the guiding parts that is led in surface in the described conveyance band.
5. image processing system according to claim 1 and 2 is characterized in that, the sensor of described checkout gear and described first encoder of formation is provided as one.
6. image processing system according to claim 1 and 2 is characterized in that, described first encoder is a linear encoder; Described second encoder is a rotary encoder.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005177448 | 2005-06-17 | ||
| JP2005177448A JP4688188B2 (en) | 2005-06-17 | 2005-06-17 | Image forming apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN1880098A CN1880098A (en) | 2006-12-20 |
| CN100453330C true CN100453330C (en) | 2009-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100930504A Expired - Fee Related CN100453330C (en) | 2005-06-17 | 2006-06-19 | Image forming device |
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| JP (1) | JP4688188B2 (en) |
| CN (1) | CN100453330C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5354975B2 (en) * | 2008-06-27 | 2013-11-27 | キヤノン株式会社 | Recording apparatus and conveyance control method |
| JP2012171766A (en) * | 2011-02-23 | 2012-09-10 | Ricoh Co Ltd | Image forming apparatus |
| JP5814648B2 (en) * | 2011-06-16 | 2015-11-17 | 株式会社ミマキエンジニアリング | Medium transport device |
| JP6946983B2 (en) * | 2017-11-30 | 2021-10-13 | 株式会社リコー | Position detection device, image reader, image forming device, program and position detection method |
| JP7016481B2 (en) | 2018-03-15 | 2022-02-07 | 株式会社リコー | Device that discharges liquid |
| JP7146603B2 (en) * | 2018-12-05 | 2022-10-04 | ローランドディー．ジー．株式会社 | Inkjet printer with cutting head |
| CN117195929A (en) * | 2023-11-07 | 2023-12-08 | 深圳市玻尔智造科技有限公司 | Automatic marking system and method |
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| EP0585881A2 (en) * | 1992-08-31 | 1994-03-09 | Canon Kabushiki Kaisha | Serial printer |
| JP2002310613A (en) * | 2001-04-11 | 2002-10-23 | Seiko Epson Corp | Measurement system, printer sheet carrying control method for printer, and linear encoder used for the carrying control |
| CN1475361A (en) * | 2002-07-10 | 2004-02-18 | 佳能株式会社 | Recording device |
| CN1502468A (en) * | 2002-11-25 | 2004-06-09 | ���ǵ�����ʽ���� | Printing apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0825699A (en) * | 1994-07-20 | 1996-01-30 | Graphtec Corp | Raster type recording apparatus |
| JPH10310276A (en) * | 1997-05-14 | 1998-11-24 | Ricoh Co Ltd | Paper feeding device |
| US6155669A (en) * | 1998-01-08 | 2000-12-05 | Xerox Corporation | Pagewidth ink jet printer including a printbar mounted encoding system |
| JP3815055B2 (en) * | 1998-05-25 | 2006-08-30 | コニカミノルタホールディングス株式会社 | Print medium conveying apparatus and printer |
| JP2003241535A (en) * | 2002-02-20 | 2003-08-29 | Ricoh Co Ltd | Belt moving device and image forming apparatus equipped therewith |
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2005
- 2005-06-17 JP JP2005177448A patent/JP4688188B2/en not_active Expired - Fee Related
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2006
- 2006-06-19 CN CNB2006100930504A patent/CN100453330C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0585881A2 (en) * | 1992-08-31 | 1994-03-09 | Canon Kabushiki Kaisha | Serial printer |
| JP2002310613A (en) * | 2001-04-11 | 2002-10-23 | Seiko Epson Corp | Measurement system, printer sheet carrying control method for printer, and linear encoder used for the carrying control |
| CN1475361A (en) * | 2002-07-10 | 2004-02-18 | 佳能株式会社 | Recording device |
| CN1502468A (en) * | 2002-11-25 | 2004-06-09 | ���ǵ�����ʽ���� | Printing apparatus |
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| Publication number | Publication date |
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| CN1880098A (en) | 2006-12-20 |
| JP2006347045A (en) | 2006-12-28 |
| JP4688188B2 (en) | 2011-05-25 |
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