JPH0259361A - Regist adjustment device - Google Patents

Abstract

PURPOSE:To increase the adjustment efficiency of a regist by setting a regist correction value based on an appropriate calculation output to a variable resistance value, and at the same time, indicating the constant variation value of the variable resistance value using a lamp. CONSTITUTION:A regist volume adjustment voltage is set using a variable resistor for regist adjustment 60, and the analog value of the voltage is converted to an 8-bit digital value through an A/D converter 61. CPU 62 reads this digital value as 256 different (2<8>=256) digital values and decides a regist correction value corresponding to each paper feed unit. Then the CPU sends a regist volume adjustment output 63 to an image control circuit 52 and a drive control device 52 of a motor and corrects the timing to perform regist correction. At that time, the CPU turns the LED ON/OFF by controlling a LED lighting circuit so that the regist adjustment volume is visually checked. For instance, every time the variable resistor 60 changes by a specified value, the regist adjustment value changes by (a)mm. At that time, when the LED has a regist adjustment function by Which it changes from 'ON' to 'OFF' or vice versa, the LED is switched ON/OFF 20 times to adjust the regist, if the regist is out of place by 20 (a)mm.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a resist adjustment device in a recording apparatus such as a laser link having a resist adjustment function.

(Prior Art) In a conventional recording device such as a laser printer, when a plurality of paper feeding and transport mechanisms are systemized,
Due to variations in the parallelism and mechanical characteristics of each unit, when the recording paper is fed from each unit and conveyed from registration 1 to the rollers, the lateral position of each unit will shift. In order to correct this, a mechanical correction was made to align the horizontal position of the recording paper before the registration 1 roller.

On the other hand, by leaving the misalignment of the paper feed as is and adjusting the starting position of the image during scanning of the optical system in accordance with the deviation, the relative position between the recording paper and the starting position of the image can be adjusted. There are ways to maintain the correct positional relationship.

This is done by first measuring the positional deviation in the horizontal direction in advance, and in order to eliminate the deviation in the starting position of writing the image on the recording paper caused by the deviation, a correction amount is set by a correction value setting means in accordance with the deviation. The counter means starts counting in response to a synchronization detection pulse, and when a predetermined reference value is counted, it becomes the recording start point in the horizontal direction.6 At that time, using the correction value set by the correction value setting means, The recording start point correction means corrects the predetermined reference value for counting.

A specific example of the above correction means will be explained below.

FIG. 8 is a diagram showing a schematic configuration of a laser printer having a plurality of paper feeding and transport mechanisms to which the present invention is applied, as will be described later.

A printer main body 1 in this laser printer includes an optical system unit 2 that optically scans a photoconductor, a process unit 3 that includes a developing unit, a photoconductor unit, a charger, etc. and performs recording processing, and a main unit 1 that supplies recording paper. It includes a first paper feed cassette 4, a second paper feed cassette 5, and a fixing unit 6 that fixes the toner image on the recording paper developed in the process unit 3 by heating and pressurizing. Further, at the top of the printer main body 1, a first paper discharge tray 9 and a second stray paper tray 10 are provided to receive recorded recording paper discharged via the conveyance path 15.

The printer main body 1 also includes a separate mass-feeding unit 7 that is used as an option as needed, and a recording paper that has been recorded on one side that has left the fixing unit 6, which is then turned over and supplied to the process unit 3 again. It is placed on an optional unit consisting of a reversing unit 8.

The first paper feed cassette 4, the second paper feed cassette 5, and the bulk paper feed unit 7 are each provided with paper feed rollers 11, 12, and 13 for sequentially feeding recording paper, and the photoreceptor of the process unit 3 A registration roller 14 is provided in front of the recording paper for aligning the recording paper and the image to be recorded in the recording paper feeding direction.

FIG. 9 is a diagram showing the configuration of the optical unit 2 in FIG. 8. This optical unit 2 includes a laser diode 16 that emits a laser beam, a collimator lens 17 that focuses the laser beam to a small spot, a cylindrical lens 18, and a polygon mirror 19 that performs optical scanning with a rotating polygonal mirror. , an FO that corrects the direction of the laser beam so that the scanning of the light spot on the photoreceptor becomes linear.
From lenses 20 and 21, a mirror 22 that changes the direction of the laser beam to the lower side where the photoreceptor is, a synchronization detection sensor 23 that detects the beginning of each scanning cycle, and an optical housing 24 that houses these optical members while shielding them from light. It has become.

An outline of the operation of the laser printer shown in FIG. 8 will be explained. This laser printer device uses a controller (character generator) to convert character codes sent from a host device such as a computer or word processor into a video signal with a dot pattern corresponding to the character code, and an engine driver to convert the character code into a video signal with a dot pattern that corresponds to the character code. It controls each control section and performs recording.

1st. Recording papers are stacked and set in the second paper feed cassettes 4 and 5 and the large quantity paper feed unit 7, respectively. One of the paper feed rollers 11, 12, 13 corresponding to the paper feed cassettes 4, 5 or the mass paper feed unit 7 is selectively driven in response to the paper start command, and the recording paper is fed out.
The tip passes through the registration sensor and the registration roller 14
When reaching this point, the recording paper is pressed against the registration roller 14, the skew of the recording paper is corrected, and the paper feed rollers 11, 12, or 13 are temporarily stopped. After the skew is corrected, the paper feed roller ii, 12 or 13 is driven again, the registration roller 14 is also driven, and the recording paper is fed into the transfer section of the process unit 3.

In this way, the first. The recording paper sent out from the second paper feed cassette 4, 5° large-volume paper feed cassette 7 or the reversing tray 1-8 is moved to the registration roller 14 in the feeding direction of the recording paper, that is, in the sub-scanning direction. By adjusting the timing of the recording paper from the photoconductor 14 to the photoconductor, the relative positional relationship between the image on the photoconductor and the recording paper is adjusted.

On the other hand, automatic adjustment means is generally not provided in the horizontal direction of the recording paper, that is, in the main scanning direction.

However, the paper feed cassettes 4 and 5 and the bulk paper feed unit 7
While the recording paper is being conveyed from the recording paper to the registration rollers 14, a lateral shift occurs.

In addition, when passing through the reversing unit 8, the deviation becomes large. After recording on one side of the recording paper, when recording is also performed on the back side, the recording paper that has left the fixing unit 6 is sent to the reversing unit 1-8, where it is reversed once, and then the recording paper is again transferred to the registration roller 1.
Reach 4 inside out. Since the conveyance path for this reversal is long, there is a risk that the recording paper will shift laterally while being conveyed along the conveyance path.

The horizontal deviation in these paper feeds is due to the paper feed cassette 4.5,
It differs depending on the inclination and mechanical characteristics of each unit, such as the large-volume paper feed unit 7 and the reversing unit 8.

Such a lateral shift changes the relative positional relationship between the photoreceptor and the recording paper, resulting in a recorded image being recorded on the recording paper with a shift. This deviation is unique to each machine, and must be precisely adjusted for each machine. Generally, such machine-specific adjustments are carried out by precise mechanical adjustment of the conveying path.

However, the adjustment work takes time and effort. Therefore, according to the above-mentioned means, the relative positional relationship between the image on the photoreceptor and the recording paper is adjusted by electrical operation as will be described later, so the adjustment work can be performed relatively easily.

Next, in the optical system unit 2, the radar diode 16 is controlled to emit light on and off using a video signal synchronized with the control timing sent from the controller. The emitted laser beam passes through lenses 17 and 18 and enters a polygon mirror 19 rotating counterclockwise.
The laser diode beam reflected there passes through the Fθ lens 20.21 while changing its reflection direction as the polygon mirror 19 rotates. The laser beam that has passed reaches the beam direction changing mirror 22 while moving from one end A to the other end B, and is reflected downward.

A charged photoreceptor (for example, an OPC drum) of the process unit 3 is arranged below the mirror 22 for changing the beam direction, and a latent image is formed on the photoreceptor depending on whether it is charged or not by the irradiation of the laser beam that reaches it. be done.

The formed latent image is developed in the developing section of the process unit 3, transferred to recording paper, and fixed in the fixing unit 6 to perform recording.

The recording paper ejected from the fixing unit will be ejected straight if face-up ejection with the printed side facing up is selected, and will be ejected straight through the transport path if face-down ejection with the printed side facing down is selected. 15 to a selected one of the first and second paper ejection trays 9 and 10 above.

A lateral registration adjustment device in a laser printer device having a plurality of paper feeding and conveying mechanisms as described above will be described.

That is, in a normal laser printer, as shown in FIG.
A laser beam is scanned by a polygon mirror 19, and the scanned laser beam is detected by a synchronization detection sensor 23 provided at a specific position in the optical unit 2 corresponding to a position before the starting position of writing the image on the photoreceptor. The detection output is used as a synchronization detection signal in the main scanning direction.

As shown in FIG. 10, after a certain period of time from the generation of the synchronization detection signal, a signal 2 indicating the starting position of image writing is generated, and then a signal 2 is generated which is a certain value determined by the size of the recording paper [1? After that, a signal W indicating the writing end position is generated.

The generation point of the signal Z representing the starting position of the image is adjusted in accordance with the deviation of the lateral registration position, and the relative positional relationship between the image on the photoreceptor and the recording paper is adjusted.

FIG. 11 is a block diagram of a control system for adjusting the deviation of the lateral registration position.

In FIG. 11, the dip switch 25 is set to the first and second positions.
The dip switch 26 is a switch for setting the image writing start position common to the paper feed cassettes 4 and 5, and the dip switch 26 is a switch for setting the image writing start position of the mass paper feed unit 7. This is a switch for setting the starting position of image writing on recording paper. These dip switches are, for example, four binary digits.

The multiplexer 28 receives a selection signal (that is, a selection signal indicating which of the units 4, 5, 7.8 is selected for paper feeding) from the main body control unit 31 including the CPU, Ilo, memory, etc. Deep switch 25.2
6.27 is selected and connected to the preset (programmable) counter 29.

The preset counter 29 is reset each time a synchronization detection signal is generated, and the initial value for counting the starting position of one image is preset by the contents of the dip switches 25, 26 and 27, and from that point on, it is used as the standard for image writing. Image clock WCLK (WRITE CL
OCK) is counted and output to the decoder 30.

The decoder 30 decodes a specific value of the output of the preset counter 29 and outputs a writing start position signal Z and an image writing end position signal W shown in FIG. 10 to the main body control unit 31.

The main body control unit 31 is composed of a CPU, Ilo, memory, etc., and is a control device that takes in image data in synchronization with the image clock WCLK in response to a print request from the controller 33, and controls the entire printer apparatus.

A control device 32 such as a motor is a control device that causes each part of the printer device to operate according to instructions from the main body control unit 30.

The controller 33 is located between the host device 34 and the printer device, and is configured to handle ASCII data sent from the host device.
It converts information such as codes into image data of a single character pattern and sends it to a printer.

Next, the operation of this device will be explained.

Paper feed cassette 4, 5. Due to the inclination and mechanical nature of each of the large-volume paper feeding unit 7 and the reversing unit 8, when the recording paper reaches the registration rollers 14, its horizontal position is not constant. Therefore, in order to check the horizontal deviation of each unit in advance and correct the deviation to record the calligraphy, set the correction value (adjustment value) corresponding to the amount to be corrected to the dip switch 25, 26, 27. Set it.

When a print request is received from the controller 33,
If the main body control unit 31 is not in the BUSY state, it sends a control signal to the drive control device 32 to drive the optical system unit 3. When the synchronization detection sensor 23 outputs a synchronization detection signal, a two-image clock is generated.

In addition, one main body control unit 31 is configured such that the unit designated by the user for use is a paper feed cassette, a mass paper feed unit, etc.
~ or an inverting unit, and sends a selection signal to multiplexer 28 to select the value of the dip switch corresponding to the designated one. Based on the selection signal, multiplexer 28 sets the output of the selected dip switch among dip switches 25, 26, and 27 to the lower bits of programmable counter 29.

The counter 29 is set to an initial value as described above, and when it receives a synchronization detection signal thereafter, it starts counting the image clock WCLK from that point. When the count value reaches OOH, a carry is output and is transmitted to the main body control unit 31 via the decoder 30, and at that time the image writing starts (Z in FIG. 10).

For example, when the counter 29 is set to 8 bits, the value of the dip switch is set to the data terminals bo-b3, and the data terminals b4-b7 of the -high bits are connected to Vcc.

If the value of the dip switch is set to 8H when the horizontal registration is normal, the position where the carry comes out from the counter 29 is It is located at a predetermined distance from the left side of the recording paper (indicated by a dashed line).

If the position of the horizontal registration on the recording paper deviates in the y direction in FIG. 10, in order to adjust the deviation, set the dip switch to a value smaller than the normal value of 8H.

In this case, the counter 29 outputs a carry after counting more than in the normal case, so as shown by the broken line in FIG. 12(b), the image writing start position relative to the recording paper (shown by the solid line) is will be adjusted to be correct.

If the horizontal registration position of the recording paper deviates in the X direction in FIG. 10, in order to adjust the deviation, set the dip switch to a value larger than the normal value of 8H.

In this case, the counter 29 outputs a carry after counting less than the normal case, so as shown by the broken line in FIG. 12(c), the image writing start position relative to the recording paper (shown by the solid line) is adjusted to be correct.

After outputting the carry of the image writing start position, the counter 29 continues counting, and when the counter count reaches a certain predetermined value, this is detected by the decoder 30 and the image writing end position W is detected. It is output to the main body control unit 31 as a signal representing the signal. Since the writing end position differs depending on the size (width) of the recording paper, the count value decoded by the decoder 30 is changed in accordance with the detection by the recording paper size detection means provided in the paper feed cassette, and the writing end position is changed depending on the recording paper size. Detects the exact writing end position.

A dip switch is provided for each unit in the paper feed system that affects the lateral registration of chart paper feed, so it is possible to adjust the horizontal deviation of the chart paper due to the characteristics of each unit by simply setting the dip switch. It can be adjusted so that no matter which paper feed unit is used, a constant standard writing start position and writing end position can be obtained.

FIG. 13 shows another means. This is the 11th
Although it is essentially the same as the means shown in the figure.

In Fig. 11, the dip switch output is selected by a multiplexer and given to the programmable counter, whereas in this case, a control unit is provided for each of the large-volume paper feed unit and reversing unit, which are added as options, and the optional control of these units is performed. The main difference is that a 4-bit depth switch is connected to each unit for setting horizontal registration adjustment values, and necessary information is exchanged between the main body control unit and the option control unit by serial communication.

A dip switch 40 for setting a correction value (adjustment value) common to the first and second paper feeding units is connected to the main body control unit 43. In addition, the first option control unit 47 for the mass paper feed unit includes a dip switch 4.
4 is connected, and an option switch 48 is connected to the second option control unit 51 for the reversing unit, and the information of these dip switches 44 and 48 is transmitted through serial communication between the option control unit 47.51 and the main body control unit 43. given by.

The main body control unit 43 includes various sensors 42 that detect paper size, paper feeding position, fixing unit heater temperature, etc.
The sensor signal from the image control circuit 52, the synchronization detection signal from the image control circuit 52, the print request signal from the controller 33, and other information are obtained to control various functions such as heater temperature control, paper feeding, resist clutch, main motor, developing motor, etc. A drive control signal is supplied to the drive device 41 of.

In addition to the dip switch 44, the option 1 control unit 47 is connected with an option 1yJA moving device 45 for driving motors, clutches, solenoids, etc. related to this option, and a sensor 46 for detecting paper size and the like. Similarly, the option 2 control unit 51 includes an option 2 drive device 49 and a sensor 50 that detects the paper feeding position.
is connected.

The image control circuit 52 receives the synchronization detection signal from the synchronization detection sensor 23, transfers it to the main body control unit 43, and synchronizes the clock produced by the crystal oscillator 53 with the synchronization detection signal to generate an image clock. do. It also receives image data from the controller 33, synchronizes it with the image clock, and sends it to the gate 60G.

The adding circuit 56 adds the reference position representing the reference position of image recording inputted from the main body control unit 43 and the correction value set by the dip switch, and outputs the result to the precera 1 to the counter 57.

The preset counter 57 is a hexadecimal count unit CU.
It consists of I to CU3, and the output of the adder circuit 56 is set in response to a load signal from the main body control unit 43.

The preset counter 57 starts counting with the set value as the initial value, and when the count reaches full count, the count unit I-CU 3 outputs a carry signal, sets the flip-flop 59, and turns on its output Q. It is something.

The decoder 58 decodes a predetermined specific value of the count value of the preset counter 57, provides its output to the reset terminal K of the flip-flop 59, and outputs the output Q.
It has the role of detecting the position W of the end point of the image area in FIG. 10.

Next, the operation of FIG. 13 will be explained with reference to the operation flow diagram of FIG. 14.

It starts in response to a print request from the controller 33 (1), makes the printer busy, and turns on the laser diode of the optical system unit 2 (2.3).

Monitor the synchronization detection signal from the synchronization detection sensor 23 4)
When the synchronization detection signal is detected, the image control circuit 52 outputs an image clock (WCLK) that rises or falls in synchronization with the clock generated by the crystal oscillator 53 with the synchronization detection signal (5).

The main body control unit 31 determines that the units designated for use by the user are paper feed cassettes 4, 5, . Mass paper feed unit 7
Alternatively, it is detected whether it is the anti-filter unit 8 or not. Then, it receives the paper size detection signal of the recording paper from the sensor 42, 46, 50 corresponding to the specified cassette 4, 5 or unit 7.8, and calculates the reference value regarding the image writing start position corresponding to the paper size. Then, the reference value is output to the adding circuit 56 (6). The reason why the reference value differs depending on the paper size is that the example is shown in which the paper is fed with the center of the paper aligned with the center of the paper feeding width. That is, when feeding the paper at the center, for example, for A4 size, the position to the left of B5 size (from left to right in the main scanning direction) must be used as the reference value for starting writing. The correspondence between the paper size and the reference value may be stored in advance in the memory in the main body control unit in the form of a table.

In addition, the main body control unit 43 controls the specified cassette 4.
.

The adding circuit 56 obtains the value to be set in the preset counter 57 by adding the reference value and the dip switch value, and is constituted by an 8-bit full adder as shown in FIG. Since the input is connected so as to add the 4 bits 1 to 1 from the dip switch to the upper 4 bits b4 to b7 of the reference value, Qt of the control of the writing start position by the m-th bit of the dip switch There are 8 dots. If the sum of the basic value from the main unit control unit and the dip switch setting value is 8 in hexadecimal, the normal image writing start position is set, and the image writing starts in the range of ±64 dots in 8-dot increments. The position can be adjusted.

The output of the adder circuit 56 is given to the data set terminals of the lower units CUI and CU2 of the preset counter 57 (8), and is rotated at the first image clock after the load signal is supplied from the main body control unit 43. (9)
,.

The preset counter 57 to which the output of the adding circuit 56 has been set starts counting from the second image clock (10).

Carry terminal CY of counter unit CU3 of the highest digit
When a carry signal is output from 3, it is applied to the set input terminal J of the JK flip-flop 59, putting it in the cent state, producing an on output at its output terminal Q (Z position in Fig. 10), and causing the main It is output as a scanning gate signal LGATE (11). Ant-game 1-60G is opened by turning on the main scanning gate signal LGATE, and supplies image data given from controller 33 via image control circuit 52 to optical system unit 2.

The main scanning gate signal LGATE is also given to the main body control unit 43, which counts it and generates the sub scanning gate signal FGATE (12).

On the other hand, the preset counter 57 is a counter unit C.
Counting continues even after the carry signal from U3 is output. The callan 1 ~ value is given to a decoder 58 that decodes a predetermined set value, and when the predetermined value is reached, an output is generated in the decoder 58 (13), and is input to the reset input terminal K of the JK flip-flop 59. Reset it (14)
. Then, the main scanning gate signal LGATE output from the output terminal Q is turned off (position W in FIG. 10).

While the main scanning gate signal LGATE is on, an image of one main scanning line is recorded. Then, in order to check whether there is the next main scanning line to be recorded, the main control unit 43 determines whether the count value of the main scanning gate signal LGATE mentioned above has reached a predetermined value. If the value has not been reached, the sub-scanning has not yet been completed, and the process returns to step (3) for the next main scanning. When the predetermined value has been reached, the sub-scanning gate signal FGA
Turn off TE (16) and end the print operation (
17).

(Problems to be Solved by the Invention) As mentioned above, in the conventional horizontal registration adjustment to maintain the correct writing start position of the image and the recording paper (Z in Figure 1O), it is difficult to use a laser printer etc. that has multiple paper feeding means. For equipment,
A means (deep switch) for setting the correction value for each paper feeding means is required, which increases costs. Also, because a dip switch was used as the adjustment means, the operability was poor.On the other hand, there are some that use the volume to adjust the registration.
This is because the correlation between the rotation angle of the volume and the amount of registration movement is not clear, and the amount of registration movement can only be determined by looking at the printed recording paper.

Therefore, in order to align the registration position with a predetermined position on the recording paper, it is necessary to print several times, and the adjustment takes time.

In view of the above-mentioned conventional circumstances, the present invention provides a recording apparatus that performs vertical registration adjustment to match the leading edge of an image with recording paper, and horizontal registration adjustment to adjust the writing start position in the horizontal direction with respect to the recording paper. When the registration adjustment volume is changed, this is converted into a digital value, a registration correction value is determined by a central processing unit, and the registration adjustment amount is displayed, thereby eliminating the drawbacks of the conventional registration adjustment volume described above. With the goal.

The second method is to use the input keys on the operation panel as a means of inputting registration correction values.
The purpose of this method is to store horizontal registration correction values in advance, read them out, and perform registration adjustment for the corresponding sheet feeding unit.

(Structure and operation) In order to achieve the above first object, the present invention provides a recording apparatus such as a laser printer having a registration adjustment function.
The registration correction value is set by an arithmetic processing output value corresponding to a change in the variable resistance value, and at the same time, a certain amount of change in the variable resistance value is displayed by lighting.

That is, the setting of the registration correction value changes in an analog manner depending on the volume, and after converting this into a digital value, the registration correction value is determined by the central processing unit. A light emitting diode (LED) for display is blinked with a digital value corresponding to this registration correction value, so that the registration adjustment amount can be visually observed. and.

Based on this registration correction value, the timing of an image control circuit and a drive control device such as a motor is controlled to adjust the registration.

In addition, in order to achieve the second object of the present invention, in a recording device such as a laser printer having a registration adjustment function, the registration correction value is set by inputting the registration correction value corresponding to the vertical and horizontal registration of each paper feeding unit. Set it using the key and memorize it.

The present invention is characterized in that, in response to a print command, the registration correction value corresponding to the paper feeding unit selected at that time is read out.

That is, by using the input keys on the operation panel, register correction values corresponding to the vertical and horizontal registration for each paper feed unit are stored in advance in a non-volatile memory, and when printing, the registration correction values corresponding to the paper feed unit are read out and based on this. Registration correction is performed by controlling the timing of an image control circuit and a drive control device such as a motor.

(Embodiment) FIG. 1 shows a block diagram of an embodiment according to claim (1) of the present invention. In the figure, 60 is a resist adjustment volume that outputs an analog voltage. 61 is A
/D converter, the resist adjustment volume 60
The analog voltage input from the converter is converted into, for example, an 8-bit digital value. A central processing unit (CPU) 62 determines a registration correction value by reading 256 digital values (21'=256). As shown in FIG. 11, this CPU transfers image data to the image clock WCL in response to a print request from the controller 33.
A part of the main body control unit 31 that controls the entire import, print, and print device while synchronizing with K (in addition, there is
o.

memory, etc.). Reference numeral 63 denotes a registration amount adjustment output processed by the CPU 62, 64 an LED lighting circuit for displaying the registration amount adjustment output, and 52 and 32 an image control circuit and a drive control device for a motor, etc., which operate on the registration amount adjustment output 63, respectively. It is.

To explain this operation, the resist adjustment volume 60
The analog value of the voltage is converted to an 8-bit digital value through the A/D converter 61. The CPU 62 executes this in 256 ways (
28=256) as a digital value, the registration correction value corresponding to each paper feeding unit is determined. Then, the registration amount adjustment output 63 is sent to the image control circuit 52.
The data is then sent to a drive control device 32 such as a motor, and the timing is controlled to correct the registration.

In this embodiment, as shown in FIG. 2, the LED lighting circuit 64 is controlled by the digital value at this time to turn off ○N10FF, so that the amount of registration adjustment can be visually observed.

FIG. 3 is an explanatory diagram of the registration adjustment by lighting the LED, and the horizontal axis shows the adjustment value of the registration adjustment volume 60 (256 types), and the vertical axis shows the registration adjustment amount at that time. For example, if the registration adjustment amount moves anwn each time the volume 60 changes by a certain amount (every 1O in rotation), and at this time, the LED has a registration adjustment function that changes from ON to OFF and vice versa, if 20 resists
If anwn is off, turn on the LED 20 times, 0N10FF
The resist can be adjusted by

In other words, by changing the volume while visually observing the lighting of the LED, you can adjust the registration misalignment. This has the advantage that there is no need to check and adjustments can be made in a short time.

Note that the above-mentioned LED is used as a display means for the registration correction value.
However, the information may be displayed on the display section of the printer's operation panel.

FIG. 4 shows a block diagram of an embodiment according to claim (2) of the present invention. In the figure, reference numeral 66 denotes an operation panel for writing and setting registration correction values into the non-volatile memory 67;
2 is an image control circuit. Further, 31 to 34 are respective devices having the functions explained in FIG. 11, and the main body control unit 3
1 consists of a CPU, Ilo, memory, etc., and detects whether it is to the paper feed cassette, mass paper feed unit, or reversing unit 1 specified by the user for use, and then first uses the manual key on the operation panel 66 to The image control circuit 52 for registration correction and the drive control device 32 such as a motor are controlled and operated at a predetermined timing. A controller 33 is located between the host device 34 (host computer) and the printer device, and is used to handle A sent from the host device.
Information such as SCII code is converted into a character pattern image and sent to the printer.

The operation panel 66 will be explained with reference to the operation panel body and the sixth setting mode matrix shown in FIG. 5. As shown in FIG. 5, the operation panel main body 661 has functions for selecting various modes such as font and format, and a function for displaying the status of the printer.

A plurality of input keys 662 to 668 are used as the mode selection function, and the LCD 6 is used as the display function.
69 and LCD669 are commonly used. Here, the input key 662 is replaced by the other input keys 663 to 66.
A key (shift key) that, when pressed at the same time as 8, gives the input keys pressed at the same time a different function than their original function.
It is. Further, the input key 663 is a key for selecting the type of mode to be set, and is configured such that each time this key is pressed, an item indicating the type is raised.

Further, input keys 664 and 665 are keys for selecting a mode to be set from among a plurality of modes M below the item selected by input key 663.

Further, the input key 666 is a key for starting test printing, and the input key 667 is a key for feeding and discharging recording paper one page at a time. Further, the input key 668 is an online/offline selection key.

Next, FIG. 6 shows a setting mode matrix of this embodiment, in which the vertical and horizontal registers of each paper feeding unit selected by the input key 663 are set in the vertical direction, and the input key 664 and the horizontal register are set in the horizontal direction.
The mode M (ml-m7) selected in 665 is set.

Next, the operation will be explained using the flowchart shown in FIG. Press the input key 663 to select the first paper feed cassette 4 (Fig. 8).
Select vertical registration and press input key 664 or 665
When m6 of mode M, that is, 2 trays is selected (1), this means that the first paper feed cassette vertical registration correction value is set to 2rItn (2).

This set value is read into the main body control unit 31 through the controller 33 in FIG. 4 or directly (dashed line), and is written to the memory address of the nonvolatile memory 67 determined for each correction value (3) and stored. Ru. This non-volatile memory 67
As shown in Figure 1, 671 to 678 have memory addresses for all paper feed units from the first paper feed cassette vertical registration correction value to the first reversal unit horizontal registration correction value, and all are stored and the process ends (4). ).

Then, when the printer receives a print command (5), the main body control unit 31 reads out the registration correction value corresponding to the paper feeding unit (6) selected at that time from the nonvolatile memory 67 (7). Registration control is performed by controlling the timing of the image control circuit 52 and the drive device 32 such as a motor according to this correction value, and paper feeding is started (8).
The image is recorded at the correct position on the recording paper (9).

For reading from the non-volatile memo blade, the data may be transferred from the non-volatile memory 67 to the RAM of the main body control unit 31 after the printer is powered on, and the registration adjustment may be performed using the data on the RAM. .

This can be achieved by simply changing the software using existing input keys on the operation panel without requiring a dedicated registration adjustment means, which has the advantage that the apparatus can be made inexpensive.

(Effects of the Invention) Since the present invention is configured as described above, it has the following effects.

The invention of claim (1) uses a resist adjustment volume, and the change is A/D converted, and the central processing unit converts the change into 256 pixels.
The registration correction value is determined by reading the actual digital value. Since the amount of registration adjustment can be visually checked according to this digital value, the amount of registration adjustment can be determined.

Further, the cost can be reduced compared to the conventional apparatus which uses a dip switch for each paper feeding unit.

The invention of claim (2) uses input keys on an existing operation panel to store registration correction values for each paper feed unit in advance, and performs registration correction corresponding to the paper feed unit selected at the time of printing. It is easy because it is corrected by value. Therefore, it has the advantage of being economical and having good operability.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment according to claim (1) of the present invention, FIG. 2 is a diagram showing the 0N10FF state of the display LED according to the registration adjustment volume value of FIG. 1, and FIG. FIG. 4 is a block configuration diagram according to an embodiment of claim (2) of the present invention, and FIG. FIG. 6 is a diagram showing an example of the operation panel main body for setting the registration correction value shown in FIG.
FIG. 7 is a diagram showing a flowchart according to the above-mentioned FIGS. 4 to 6. FIG. 8 is a diagram showing an example of a laser printer having a plurality of paper feeding and transport mechanisms to which the present invention is applied. FIG. 9 is a diagram showing the configuration of the optical unit in FIG. 8,
FIG. 10 is a diagram for explaining the relationship between the synchronization detection position and the image area and the adjustment of the lateral registration position, FIG. 11 is a block diagram of the operation control system shown in FIGS. 8 to 10 above, and FIG.
The figure is a diagram for explaining the adjustment of the writing start position of the image.
) is shifted in the y direction in Figure 10, (c) is the first
This shows a case where the image is shifted in the X direction in Figure 0. Figure 13 is a block configuration diagram of the operation control system that includes the main body control unit and option 1 control unit.
FIG. 4 is an operation flow diagram for explaining the operation of FIG. 13, and FIG. 15 is a diagram showing details of the connection between the addition circuit and the preset counter. 1...Printer main body, 2...Optical system unit,
3... Process unit, 4... First paper feed cassette, 5... Second paper feed cassette, 6... Fixing unit, 7... Mass paper feed unit, 8...
Reversing unit, 9...First paper output tray, 10...
・Second paper output tray, 11.12.13... paper feed roller,
14... Registration roller, 15... Conveyance path, 1
6...Laser diode, 17...Collimator lens, 18...Cylindrical lens, 19...Polygon mirror 20°21...Fθ lens, 22...
- Mirror 23...Synchronization detection sensor, 24...Optical nozzling, 25.26.27.40.44.48
... Deep switch, 28... Multiplexer,
29, 57...Preset counter, 30.58...
・Decoder, 31.43... Main body control unit, 32
...Drive device, 33...Controller, 34...
Host device, 41... Main body drive device, 42... Sensor, 45... Option 1 drive device, 46... Paper size sensor, 47... Option 1 control unit, 4
9...Option 2 drive device, 50...Paper feed position sensor, 51...Option 2 control unit, 52...
・Image control circuit, 53...Crystal resonator, 56...Addition circuit, 59...
・JK flip-flop, 60G...gate, 6
0... Registration adjustment volume, 61...A/
D converter, 62... CPU, 63... Registration amount adjustment output, 64... LED lighting circuit, 66...
Operation panel, 67... non-volatile memory.

Claims (2)

[Claims] (1) In a recording device such as a laser printer that has a registration adjustment function, the registration correction value is set using an arithmetic processing output value that corresponds to a change in the variable resistance value, and at the same time a fixed amount of change in the variable resistance value is displayed by lighting. A resist adjustment device characterized by: (2) In a recording device such as a laser printer that has a registration adjustment function, to set the registration correction value, use the input keys to set the registration correction value corresponding to the vertical and horizontal registration of each paper feed unit, store this, and then issue a print command. A registration adjustment device characterized in that a registration correction value corresponding to a paper feeding unit selected at that time is read out.