JPS59151564A - Control system of image forming device - Google Patents

Abstract

PURPOSE:To attain the smooth control inexpensively with high speed and high accuracy by controlling a driving source split into plural groups by one control means of each group. CONSTITUTION:A main processor group 41 detects inputs from an operating panel 44 and an input device 45 and controls a high voltage transformer 46, a destaticizing lamp 28, and motors 31-40 for attaining copying. The motors 35, 37, 40, 47 among the motors 31-47 are controlled directly by the main processor group 41 via a motor driver 48 and the motors 31-34 and 36-39 are controlled by the 1st and the 2nd sub-processor groups 42, 43 based on the start and stop command from the main processor group 41. Thus, the high speed and high accuracy drive of the motors 31-39 is attained inexpensively.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a control system for an image forming apparatus of a distributed driving source type.

[Technical background of the invention and its problems]

Recently, for example, copying machines using pulse motors as a driving source for optical systems and the like have been considered. In this case, since high-speed control of the pulse motor is required, one processor (control means) can only control one or two pulse motors. This is because the processor does not control only the pulse motor, but also controls the entire copying machine at the same time. Therefore, in copying machines equipped with more pulse motors, so-called Life (IvI#) distributed type copying machines, it is not possible to perform high-speed control of each pulse motor by one processor, and a dedicated circuit is required for each pulse motor. However, this type of control method requires a dedicated circuit for each pulse motor, which not only increases costs, but also allows each pulse motor to operate at high speed, smoothness, and precision. There are problems such as not being able to control it.

[Purpose of the invention]

The present invention has been made in consideration of the above-mentioned conventional technique, and its object is to provide an image forming apparatus with a distributed driving source.
6WD 1 without the need to provide a dedicated circuit for each drive source.
It is an object of the present invention to provide a control system for an image forming apparatus that enables high-speed, smooth, and highly accurate control of M@, thereby achieving optimal control and reducing costs.

[Summary of the invention]

The control method of the uJj I & forming apparatus according to the present invention is an image forming apparatus having a configuration in which drive sources of the drive unit are distributed.
Optimum control can be performed by dividing the single drive source into a plurality of groups and providing one control means for each group.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 schematically shows a copying machine with distributed driving sources according to the present invention. That is, I is a main body of the copying machine, and on the top surface of this main body 1 is fixed a document table (transparent glass) 2 that supports the JM and stripes, and on this JM table 2 is a document cover 3 that can be opened and closed freely. It is provided. The original set on the document table 2 is moved back and forth by an optical system consisting of an exposure lamp 4 and mirrors 5, 6, and 7 reciprocating the lJ3 along the lower surface of the document table 2 in the direction of arrow a. It is designed so that the exposure is scanned when the camera is moving.

In this case, mirror 6.7 moves at j=rw of mirror 5 so as to keep the optical path length constant.

The light reflected from the original by the movement H of the optical system, that is, the light reflected from the original by the light irradiation of the four-light lamp 4, is reflected by the mirrors 5, 6. The image of the yA vortex is reflected by the mirror 9, passes through the variable magnification lens block 8, is reflected by the mirror 9, and is guided to the photoreceptor drum 10.
The image is formed on the surface of ゜.

The photosensitive drum 1o rotates in the direction of the arrow C, and the surface is first charged by the charging device 11, and then an electrostatic latent image is formed by exposing the image of the document to the slit a. The electrostatic a-image is made visible by applying toner to it by a developer 12.

On the other hand, the paper P is taken out one by one from the selected upper paper feed power center 13 or lower paper feed cassette 14 by the feed roller 15 or 16, and is taken out one by one by the paper guide path 12 or 1
8 and is guided to a pair of registration rollers 19, and then sent to a transfer section by a pair of registration rollers 19. Here, each of the above-mentioned feed and low cassettes 13 and 14 are removably provided at the lower end of the right side of the main body 1, and one can be selected from an operation panel (not shown). Then, the sheet P sent to the transfer section is moved to the surface of the photoreceptor drum 10 by the transfer device 200, and is then transferred to the photoreceptor drum 1 by the action of the transfer device 200.

The upper toner image is transferred. This transferred paper P is
The sheet is peeled off from the photoreceptor drum 10 by the action of the peeling charger 2 and conveyed through the paper conveyance path 22, and is sent to and passes through a pair of fixing rollers 23 as a fixing device provided at the terminal end of the sheet conveyance path 22. The transferred image is fixed. After fixing, the paper P is discharged to a tray 25 outside the main body 1 by a pair of paper discharge rollers 24.

Further, the photosensitive drum 10 after the transfer is transferred to a removable charger 26.
After the static electricity is removed by the cleaner 27, residual toner on the surface is removed, and the afterimage is erased by the static electricity removal lamp 28, so that the image returns to the initial state. Note that 29 is a cooling fan that prevents the temperature of hot water inside the main body 1 from rising.

FIG. 2 shows an example of the structure of the drive source of each drive section of the copying machine constructed as described above, and is composed of the following motors. That is, numeral 3 is a lens motor, which is a motor for moving the position of the lens block 8 which is used to change the magnification. 32I'i mirror motor is used to change the distance (abbreviation -FC) between the front mirror 5 and the mirror 6.7 for zooming. A scanning motor 33 is a motor for moving the exposure lamp 4, the mirror 5, and the front mirror 6.7 for scanning the original. A shutter motor 34 is a motor for moving a shutter (not shown) for adjusting the charging width of the photosensitive drum 10 by the charger 1 during zooming. 35 is a motor for driving the developing roller of the developing unit 12. 36 is a drum motor for driving the 1″ #11 self-photosensitive main drum 10. 37 is a fixing motor, which connects the paper feed path 22 and the fixing roller pair 23.
and) a motor for driving the non-paper roller pair 24. Reference numeral 38 is a paper feed motor, which is connected to the feed rollers 15 and 16.
Hidden rabbit! This is a motor for 390'i is a paper feeding motor, and 'I' is a motor for driving the registration roller pair 79. A fan motor 40 is a motor for moving the cooling fan 29. Here,
The upper motors 31 to 34, 36, 38, and 39 are, for example, four-phase pulse motors, and the upper motors 35, 3
7.40 is a DC branless motor.

FIG. 3 shows a control circuit for an old body, in which a main processor right 141, ff1l1. 44 and various switches and sensors, etc., and the high-voltage transformer 46 that drives the 7 valley washing machines, the static elimination lamp 28, and the platen renoids 27 of the front 6C cleaner 27.
The above-described copying operation is performed by controlling the heater 23a1 of the pair of a1nildelta rollers 23, the front light lamp 4, and each of the motors 31-40. Above motor 3~4
0, the motor 35.37° 40 and the toner motor 47 that supplies 9i of toner to the developing device 12 are controlled by the main processor group 41 via a motor driver 48, and the motors 31 to 34 are controlled by a pulse motor driver. The motor 36 is controlled by the first sub-processor group 42 via the motor 49.
．． 38 and 39 are controlled by the second sub-processor group 43 via the pulse motor driver 50. Further, the exposure lamp 4 is controlled by the main processor group 41 via the lamp regulator 51, and the heater 23a is controlled by the heater control section 52.
It is controlled by the main processor group 41 via the main processor group 41.

Then, the main processor g41 sends commands to drive and stop each motor to the first and second sub-processor groups 42.43, and the first and second sub-processor groups 42.43 to the main processor group 41 send commands to drive and stop each motor.・Pivoting, stopping
−, a status indicating the condition is sent. In addition, the J31 subgross sensor group 42 detects the first ignition of each of the motors 31 to 34 ((ikt'1 from the fffl sensor 53).
Information has been entered.

FIG. 4 shows an example of the structure of the Meiroglonatus group 41. In other words, 6] is a one-chip microcomputer (hereinafter simply referred to as microcomputer), and is
Via the controller 2, key human power detection on an operation panel (not shown) and keyaki display control are performed. Further, the microcomputer 61 is expanded by input/output capotros 3 to 66.

The input/output capotro 3 is connected to a high voltage transformer 46, a motor dryer (48), a lamp regulator 51, and other outputs, and the input/output capotro 4 is connected to a size switch for detecting paper size and other human power. , a copying condition setting switch and other human power etc. are connected to the input/output capotro 5.
is for options.

FIG. 5 shows an example of the structure of the first sub-processor group 42. As shown in FIG. That is, 71 is a microcomputer, which is connected to the main processor group 41. 72 is a programmable interval timer for phase switching/interval time control 1 of the pulse motor, and when a set value is set from the microcomputer 71, it counts based on it, and when it has counted out, the end pulse is sent to the microcomputer. 71 interrupt line. A clock pulse is input to the timer 72. Further, the microcomputer 7) receives the position information from the position sensor 53 and is connected to the input/output port door 3.74. Motors 31 to 34 are connected to the input/output coupler door 4 via a pulse motor driver 49. The input/output coupler 3 is used for outputting the status signal of each pulse motor to the main processor 41.
Historically used.

FIG. 6 shows an example of the beak structure of the second subgrocer B4ta. In other words, 8I is a microcomputer, connected to main processor #41, and installed. 82 is a programmable internocle timer for controlling the 1# time interval between pulse motors, and when a set value is received from the microcomputer 81, it counts according to the set value.
When the count is out, a termination pulse is output. This end pulse is latched by the latch circuit 83, and its output is supplied to the interrupt line of the microcomputer 8I and the input/output boat power line. Further, an input/output port 84 is connected to the microcomputer 81, and motors 36, 38, and 39 are connected to this input/output port 84 via the pulse motor driver 50.

In such a configuration, first the main processor
The operation will be explained with reference to the flowchart shown in Figure i47. After turning on the fan, the fan motor 40 is turned on, and the operations of the lens motor 3), the mirror motor 32, the scanning motor 33, and the shutter motor 34 are activated. Issue an initialization command.

Then, it is checked whether the initialization has been completed or not based on the status from the first sub-processor group 42,
When the fixing roller pair 23 is finished, the fixing roller pair 23 is subjected to heat arranging. When the fixing roller pair 23 heats up as a result of this check, it is checked whether or not the cover-up key has been pressed.
If pressed, move to iusha chokusaku. That is, the blade solenoid 27a is turned on, the static elimination rung 28 and the salt 1 motor 35 are turned on, and a command to turn on the drum motor 36 is issued. Next, the transfer charger 20 and the peeling Imaichi 1521 are turned on, the fixing motor 37 is turned on, and a command to turn on the paper feed motor 38 is issued. Next, turn on the Fukko lamp 4, turn on the banding Teiden 11, and turn on the moving motor 3.
Issue the forward rotation ON command of 3, and! @ Issue a command to turn off the paper motor 38, issue a command to turn on the paper feed motor 39, and turn on the paper feed motor 39.
City charger 11 is turned off.

At the same time, it is checked whether the scanning motor 33 has finished normal rotation or not, and if the scanning motor 33 has finished rotating in the normal direction, a command 66 to turn on the scanning motor 33 in the reverse direction is issued. Next, turn off the 4 commercial lamps, and turn off the 3 paper feed motors.
9, the developing motor 35 is turned off, and the fixing motor 37, the transfer charger 20, and the peeling meter 2 are turned off.
1 Ke off. Next, drum 1. +4 Issue a command to turn off the motor 36, turn off the static elimination lamp 28 and the blade solenoid 27a, and in the case of copying several fX images, go to 4 and repeat the same operation.

Next, the operation of the first sub-processor group 42 will be explained with reference to the flowchart shown in FIG.

After turning on the command, it waits until it receives a command from the main processor 4I, and when it receives it, it checks whether it is an initial setting command or a fault, and if it is an initial setting command, it proceeds to ①. That is,
First, after setting the movement ambiguity and moving direction of the scanning motor 33, turn on the scanning motor 33, and turn on the scanning motor 33, and its standing pupil sensor (
After turning on the home switch), the retirement motor 33 is turned off. Next, after setting the movement arm and g movement direction of the lens motor 31, the lens motor 31 is turned on, and its position sensor (lens switch) is turned on. r - turn off. Next, mirror motor 3
After setting the moving switch and moving direction of #2, turn on the mirror motor 32 and turn on its position sensor (mirror switch).
After turning on, the mirror motor 32 is turned off. Finally, after setting the sharpness and movement direction of the motor 34 for Nyanota, turn on the motor 34 for the shutter, turn on the motor 34 for Nyatsuta, and turn on the motor 34 for Nyatsuta. do. This completes the processing of the initial setting command and returns to the state after the electric bullet was turned on.

- If the received command is not a setting command, check whether or not it is an ON command for the shutter motor 34, and if it is an ON command, set the movement hand and direction of movement, and turn the shutter motor 34 on. Turn on. If it is not a command to turn on the shutter motor 34, then it is checked whether or not it is a command to turn on the lens motor 31, and if it is a command to turn on the lens motor 31, the moving needle is set in the Aτ1j7J direction, and the lens motor 31 is turned on.
Turn on 1. If it is not a command to turn on the lens motor 310, then it is checked whether it is a command to turn on the mirror motor 32, and if it is the command to turn on the mirror motor 32, s@JJi and n moving direction are set and the mirror motor 32 is turned on. If it is not a command to turn on the mirror motor 32, that is, if it is not any of the commands mentioned above, it is a command to turn on the scanning motor 33, so set the 8-movement and movement direction, and turn on the scanning motor 33. do.

Next, the operation of the second sub-processor group 43 will be explained with reference to the flowchart shown in FIG.

After turning on the power, it waits until it receives a command from the main processor group 41, and when it receives it, it checks whether it is a drive start command or not. With this check, in the case of a drive start command,
First, it is checked whether or not there is a command to turn on the drum motor 36, and if it is a command to turn on the drum motor 36, the drum motor 36 is turned on.

If it is not a command to turn on the drum motor 3, then it is checked whether or not there is a command to turn on the paper feed motor 38, and if it is a command to turn on the paper feed motor 38, the paper feed motor 38 is turned on. If it is not a command, then it is checked whether or not it is a command to turn on the paper feed motor 39, and if it is an on command, the paper feed Tanabata 38 is turned on.If it is not any of these commands, after turning on the tunryu. Return to the state of deafness.

On the other hand, if the received command is not a command to start the drum movement, first, it is checked whether the drum motor 36 is turned off or not, and if it is an ON command, the drum motor 36 is turned off. If it is not a command to turn off the drum motor 36, then it is checked whether it is a command to turn off the X paper pick-up motor 38, and if it is, the paper feed motor 38 is turned off.

If none of these commands, the paper feed motor 38
Turn off.

FIG. 10 shows the control circuit of the pulse motor.
4) is connected to a pulse motor driver 92 (corresponding to the pulse motor driver 49, 50 in FIG. equivalent to 39)
The windings A, A, B, and B are connected to each other.

FIG. 11 shows a method for speed control of a pulse motor, where (a) shows the speed of the pulse motor, and (b) shows the phase [;IJm interval. As is clear from this figure, the 4th cutting interval is long at the beginning, and gradually becomes shorter.
Eventually, they become evenly spaced, gradually become longer again, and then stop.

In other words, this indicates the through-up and through-down of the pulse motor, starting from the self-starting -iI region, being used in the high-speed region, and finally falling. In addition,
tI.

t2 1...tx indicates the time of the phase switching interval.

In this way, each pulse motor is divided into a group that makes the optical system vibrate (motors 31 to 34) and a group that makes other drive parts vibrate (motors 36°, 38, 39), and the optical system is moved stepwise. Each of the motors 31 to 341rJ in the group is controlled by the second subprocessor 43 in the first sub-processor group 42, and each motor 36, 38, 39 in the group that drives a drive unit other than the optical system is controlled by the second sub-processor 43.
Sub processor #rtz, 4s as main processor group 4
1. Therefore, without providing a dedicated circuit for each pulse motor, each pulse motor can be controlled at high speed and smoothly with a high degree of 4n<sr=1.
Therefore, the optimum gun n1 for a copying machine with a distributed driving source is
This makes it possible to perform flexible operations and reduce costs.

In addition, in the above-mentioned example, the explanation was given for the case where the four lines were applied to a copying machine, but the present invention is not limited to this, and can also be applied to electronic printers, facsimile machines, etc. In short, it is possible to disperse the IigWdj function of the drive unit. The present invention can be applied to any image forming apparatus having the following configuration.

〔Effect of the invention〕

As described in detail above, according to the present invention, in a driving source distributed type formation device, each driving source can be operated at high speed, smoothly, and with high accumulation without providing a dedicated circuit for each driving source. Thus, it is possible to provide a control method for an image forming apparatus that enables optimal control and reduces costs.

[Brief explanation of drawings]

The drawings are for explaining one embodiment of the present invention, and FIG. 1 is a schematic diagram of a copying machine, FIG. The block diagram of the overall control circuit, Figure 4 is the block diagram of the main processor, and Figure 45 is the block diagram of the main processor.
FIG. 6 is a configuration diagram of the second sub-processor group, FIG. 7 is a flowchart for explaining the operation of the main processor group, and FIG. 8 is a flowchart for explaining the operation of the first sub-processor group. 9 is a flowchart for explaining the operation of the second sub-processor group, FIG. 10 is a schematic configuration diagram showing the control circuit of the pulse motor, and FIG. 11 is a flowchart for explaining the speed control method of the pulse motor. This is a diagram. 2... Original table, 4... Exposure lamp, 5, 6, 7°9
... Mirror, 8... Lens block, 10... Photosensitive drum, 15.16... Delivery roller, 19...
Registration roller x, 23... Fixing roller pair, 31 to 34
．． 36.38.39...Pulse motor, 35°37.
40.47...DC brushless motor, 4)...Main processor Jq, 42, 4'3...Sub processor #61+71+81...Microcomputer, 162-6
4, 73, 7'4, 84...I/O port, 72
．． 82...Programmable interval timer. Deton Agent Patent Attorney Watako Takehiko 5th s 6m 竿7 Prisoner 8!11 (a) -yo6- 118 figure (b) 1E91! ! ll No. 10 Figure 9B11

Claims (1)

[Claims] +11 In an image forming apparatus having a configuration in which the drive sources of the drive section are distributed, the drive sources are divided into a plurality of groups, and one control means is provided for each group. Characteristic control method of image forming apparatus. (2) The image forming apparatus control method according to claim 1, wherein the divided groups include a group for driving an optical system and a group for driving other drive units. +31 A pulse motor is used as a drive source for the group for driving the optical system, and the control means for the group is mainly composed of a one-chip microcomputer. Control method for image forming device.