JPS59131923A - Optical system controller for copying machine - Google Patents

Abstract

PURPOSE:To vary a combination of magnification extremely easily under the control of a computer by a magnification combination selection switch without any need to change driving cams and driving gears of an optical system. CONSTITUTION:When magnification is varied from 100% magnification, a switch 32 judges which combination of magnifications is set. When a 80% magnification button 30 is pressed, the number 200 of pulses corresponding to 81% is read out of an address 506 of an ROM25 and stored in an address 1002 of an RAM26 and a magnification display lamp 31 for 81% is turned on. A preset counter 27 sets the difference 210 between the number 410 of pulses in an address 1,000 of the RAM26 and the number 200 of pulses in the address 1002 and also outputs a rotational-direction command signal to stepping motor driving parts 33 and 34 to output a pulse signal until the set value 210 attains to zero. Stepping motors 15 and 16 rotate in the specified direction according to the number 210 of pulses to move mirrors 12 and 13 to an optical position where 81% magnification is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION To detect an unexploded nu, adjust the horizontal magnification by moving the lens and mirror to the optical position according to the magnification using a drive motor, and then Directional magnification adjustment - R6 slit light calculation method Magnification reduction 1 [This is related to the transformation copying machine.

When exporting a copying machine that can select multiple stages of reduction or enlargement to overseas markets, the size of the paper used varies depending on the region.
Since 1 inch is used, the magnification is 65% and 74%.
, 129%, 154%, etc. are required, but in Europe, where A4 size paper is used, the reduction ratio is 6 to 70%, 81%, 122%, 141%, etc. Magnification is required.

However, in vertical copying machines, a position detection part of the optical system is installed for each reduction ratio, and a multi-stage transmission is used to change the power transmission speed ratio of the scanning system in stages. American] power market and European market @(
In this case, it is necessary to prepare the position detection parts in two groups and to prepare two multi-stage transmissions, which has the disadvantage that the manufacturing process and warehouse management become complicated.

The invention relates to an improvement of a slit exposure type variable magnification copying machine that eliminates such drawbacks, and its purpose is to:
The point is that a combination of predetermined magnifications can be selected by a selection device in a copying machine equipped with an optical system capable of setting the positions of all required magnifications.

An embodiment of the present invention illustrated in the drawings will be described below.
III Ifro.

1 is an electrophotographic copying machine cage, in which a console 2 is disposed on the upper surface in front of the cage 1, and a movable document table 3 is driven back and forth to the left and right by a scanning drive motor 4 at the back of the console 2. ing.

In addition, 61 drum-shaped photoreceptors 5 or 1 are installed in the aerial photographic silicon casing 1.
'A'A is arranged so as to be rotated clockwise by a motor (not shown), and on its outer periphery, as in a normal electrophotographic copying machine, a charger 6, a developer 'a7, a transfer peeler 8, and a cleaner 9 are installed. are arranged in a clockwise direction.

Further, a lamp 10 is disposed below the left end of the movable document table 3 at the return position, and mirrors 11, 12, an in-mirror 13, and a mirror 14 are arranged alternately left and right on the right side of the lamp 10, and the document table 3'- The image of the document irradiated by the lamp 10 is formed on the drum-shaped photoreceptor 5 through the mirrors ]1.12, ]:3.14.

Rough mirror] 2 and inner mirror]: The stepping motor 15.16 drives the belt 17.1.8, respectively, and the number of pulses applied to the stepping motor 15.16 increases. With a ratio of 1 to 1, the mirror 12 and the in-mirror 13 are arranged so that their layers can be moved from side to side.

Zaranimata belt 1.7.18 and actuator 19.
20 is attached and the optical system magnification is set to the minimum, the sensor 21.2 is attached to the actuator 19.20.
2 is torn at the crotch.

Control unit 23G, 0PU24, ROM25, RAM
It is composed of a microcomputer consisting of a 26.711 set counter 27, an input interface 28, and an output interface 29, and the control section 23 is
Input the magnification signal from the magnification button 30 disposed on the console 2, the optical system position calibration signal from the sensor 21, 22, and the magnification combination selection switch 32, etc.
A reduction ratio selection signal is sent to the reduction ratio display lamp 31 of the console 20, and the drive unit 33. of the stepping motor 15.1.6 is sent.
Output a control signal to the motor 34 and a scanning system control signal to the motor 4, respectively.

However, in the console 2, when any one of the reduction ratio buttons 30 is pressed, the corresponding reduction ratio display lamp 3
1 is lit and the reverse folded magnification is displayed.

'f, FtOM 25 of the microcomputer 23, as shown in Figure 6 vC1, the distance between the mirror J2 and the sensor 21 in the optical system and the distance between the in-mirror 13 and the sensor 2217J1 are determined according to the magnification factor. The number of pulses corresponding to the distance according to the magnification, that is, the selected magnification, is applied to the stepping motors 15 and 46 necessary to move the mirror 12, 13 from the sensor 2 and 22 to the respective predetermined positions. I remember the number of cabals I entered.

Roughly, the ROM 25K corresponds to each reduction ratio, and the speed control value of the 1: scanning drive motor 4 is the same as in FIG. 6 [Nl-! I remember it.

The RAM 26 also contains inputs to the stepping motor 15 and 16 corresponding to the current reduction ratio.
Stepping motor 1 corresponding to the set reduction ratio
The entry cabalus to 5.16 is now remembered every time the scaling factor is set.

Further, the preset counter 27 is configured to set the number of inputs to the stepping motors 1, 5, and 16 necessary for changing the magnification.

The tray 11114-f will be described below with reference to the flowchart of operation '&811A'l of the embodiment.

When the whistle source of the stopper is turned on, the stepping motor drive section 3 is output from the CPU 24 via the output interface 29.
3. A drive signal is given to 34, and the stepping motor 1
5,] and 6, the actuator 19 is driven by VC so that it approaches the force sensors 21 and 22.

When the actuator 19.20 is turned on, the stepper motor 15.16 is reversed and the drive pulses of the same motor 15.16 are counted.

When the roughly counted number of pulses reaches 410, which corresponds to a reduction ratio of 1 (10%), the number of pulses j4]-0j is taken out from address 514 in the ROM 25 and stored in the RAM 26.
Please remember address 1000.

At the same time, in the control unit 23 Vc, a speed clock with a reduction ratio of 100% is set for the scanning system drive motor 4.

Next, when there is a change in the reduction ratio, it is determined that the reduction ratio combination selection switch 32 is set to either the European reduction ratio combination shown in Figure 4 or the American reduction ratio combination shown in Figure 5; For example, if the second reduction ratio button 30 from the one with the lowest reduction ratio is pressed in a European reduction ratio combination, the pulse number 1 "20" for 81% of the 61st army
0'' is taken out from address 506 of ROM 25 and stored in RAM.
26, the 81% magnification display lamp 31 is lit, and the 81% reduction ratio display lamp 31 is lit.
The difference between the number of pulses at address 000 "410 j" and the number of pulses at address 1002 "200""210j" is determined, and the difference "2] Oj is set in the preset counter 27. At the same time, the reduction rate speed of 81% is the previous control value. is set, and a rotation direction command signal for rotating the stepping motor J5. A pulse signal is output until " becomes zero, and as a result, the stepping motor 15,16 generates the number of pulses [[
Rotate corresponding to toj and move to the optical position that makes up the mirror 12.13 & magnification of 81%.0 And when the optical system becomes an optical system with a magnification of 81%, the RAM
The number of pulses 1j200j is stored in the 1000i field of 26, indicating the current magnification of the optical system.

When the reduction ratio is changed again to the maximum reduction ratio vCg, the maximum reduction ratio of 141% of the European reduction ratio combination is selected, and the same subtraction as above, that is, 200-880=-6
80 is performed, the stepping motor 15.16c is rotated in the negative direction by an angle corresponding to the pulse i"680j, an optical system with a magnification of 141% is constructed, and the 100% of the RAM 26 is
The number of pulses 1)' sso j is stored at address 0, and the speed control value corresponding to the 141% reduction ratio stored in the ROM 25 VC of the scanning drive motor 4 is taken out and set in the preset counter 27. , the scanning drive motor 4 is driven at that speed during copying.

In this way, in the above embodiment, there is no need to prepare a position detection section for the optical system for each magnification ratio of two or more combinations, and the drive cam and drive gear of the optical system can be changed.
There is no need for a coarse scanning transmission,
By using the reduction ratio combination selection switch 32 and the computer control section 23, it is possible to change the combination of reduction ratios of the copying machine very easily.

In the embodiment described above, the optical position calibration operation is performed when the power of the copying machine is turned on.
When the interlock of the collar camera is closed, the magnification is set to 100%.
When set to , select interrupt mode 1. An optical position calibration operation may be performed at the same time.

Further, in the above embodiment, there are two types of reduction ratio combinations, but it is also possible to have three or more types of reduction ratio combinations and to select any one of them.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a copying machine equipped with an embodiment of the optical system control device for copying equipment according to AT-1 of the present invention, Figure 2 is a plan view of its console, and No. 31 is the same as that shown in Figure 1. Longitudinal side view, No. 41
fi and 51st I are explanatory diagrams showing the combinations of European and American yarn reduction ratios at 1''A, respectively, and the 61st sub is the pulses at the mirror and center positions of the optical system at each reduction ratio. 111 and 81 are flowcharts of the @' arrangement embodiment. ■... Intermediate copying machine casing, 2... Console, 3.
. . . Moving document table, 4. Scanning drive motor, 5. Drum-shaped photoreceptor, 6. Charger, 7. Developing device, 8.
...Transfer peeler, 9...Seima, 1o...Lamp,
11.12...Mirror, 13...In-mirror, 14
...Mirror, 15,]6...Stepping motor,
17.18...Bell), 19.20...Actuator, 21, 22...Sensor, 23...Control unit, 24...OPU, 25...ROM, 26...R
AM-, 27...Preset counter, indication...
Input interface, 29... Output interface,
30...Reduction ratio button, 31...Reduction ratio display lamp, 32...Reduction ratio button selection switch, 33.34
...Stepping motor drive unit. Agent: Patent attorney Nozomi Ehara, 1st prisoner, 4th prisoner, house 5, door 7

Claims (1)

[Claims] In a copying machine that includes a control section that moves an optical system to an optical position according to a magnification factor via a drive motor, and that can select a plurality of magnification factors, The control unit Vc controls two or more reduction ratio combinations.
J41, the copying pQ#1 optical system control device is characterized by being provided with a reduction factor combination selection device for selecting the reduction factor combination.