JPS60184239A - Control method of optical system in scan type copying machine - Google Patents

Abstract

PURPOSE:To recognize a danger to prevent accidents even if power is supplied suddenly during adjustment or repair, by moving auxiliarily a scanning system in a speed lower than the moving speed before the test reciprocating motion of the scanning system is started. CONSTITUTION:When power is supplied to a microcomputer 3, it is initialized, and a subroutine is processed to place surely a scanning system 1 in the home position. Next, a DC motor M1 is set to the certain speed forward rotation mode, and speed data is set, and auxiliary movement of the scanning system 1 is started. At this time, the speed is set to such low value that the scanning system can take save from danger. The scanning system is held until a brake switch SW-B is turned on; and when turn-on of this switch is discriminated, control of a certain speed in the scan direction is terminated, and the scanning system 1 is returned to the home position by the subroutine, thus terminating auxiliary movement.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical field: This invention relates to a telephoto copying machine that reciprocates the scanning system on a test basis at the same time as power is turned on.

5 Legacy technology In general, copying machines have load conditions of each machine element9.
For checking each detection switch, etc., or for abdominal photography.
In order to obtain the control data necessary for one production, the actual Hu
``7'' Scanning system back and forth as a test for mJ's 1) 7■)
There are many things that cause poly(σ). ° Still, there are quite a few of them that perform test day JiIJ work at the same time as the power is turned on, and in such cases, -ri.

-When Bisman etc. were performing 1 adjustment or b-operation-], the power suddenly turned on, causing accidents such as the scanning system getting damaged. ) Normally, test 1 If: kl: It is removed at the same speed as when making an actual copy.
It is difficult to evacuate from the work, and electrical system failure may occur.
I was constantly exposed to danger when checking for causes.

The present invention is as follows. This was done in view of the problems mentioned above, and its purpose is to prevent rain from occurring due to the change in the forest system during adjustment or during a disaster.

To achieve this objective, the scanning system is preset at a speed lower than the transfer speed at power-on.
This feature is characterized by causing 1D+.

EXAMPLE Below, an example of a real waste IL for a wooden block L will be explained in terms of 1·t, -·.

Figure 1 - Juzen no applying light January to 0/l? (Setting machine (
10) 1114 configuration is schematically shown in /[Squirrel 1 fold view, firstly, 1, -2 in this figure? I'll explain the composition of machine (10) and its 01 work in simple 111...? 9'Ge 1 (10) A to fl, 1118 to the medium heat part, anti-11, C direction to 111/, j57 motion 1'lJ"
J Keishi 11 Shiso C-body drum (11) is installed, and around it are main eraser lamps (+2), sub-charging -/1
．． - Ji4. (13), leave eraser lamp (+4)
, Maine State Electric-1 Yaja (+5), developing device f'f
(16), Converter, (+7), su'ri one paper separation charger (tS), and a cleaning device (19) for 11 types of blades! There are 110 arrangements. 1
One photoreceptor drum (11) has a J (Q photoreceptor layer) cast on its surface, and this one photoreceptor has an nft eraser lamp (+
2).

By passing through (14) and the charged charger (+3) and (+5), a uniform 111 charge is generated, and the scanning optical system (
20) Received the Girinro'/C from 20).

The scanning optical system (20) scans the original image using the F-horn of the original glass, and is equipped with a light source (27), movable mirrors (2+), (22), (23), and a lens (2).
4) and a mirror (25).

The light source (27) and the single moving mirror (21) are! 18', it runs to the left at a speed of (v/m) (in, copying magnification) with respect to the circumferential velocity (V) of the body drum (11) (constant regardless of the magnification or variable magnification). Movement: lil+, possible O' Mirror (22), (2B) is (v/2n1) no speed te/+'
, )jK#,! 1 white current motor (like I21J)
M+) for 1 le! Iil+sa+1ノ,.

On the other hand, on the left side of the copying machine water body, the paper feed r-1-ra (3]) and (as) are O! ! I got the paper cassette (3)
0), C32) are removable and have a crotch 11N/
The paper conveyance path consists of a record pair (84), (35), a timing roller pair (36), a conveyor belt (37), a theoretical device 1'''4 (38), and a discharge roller pair (39). There is.

In the above configuration, the main unit includes the photoreceptor drum (11), the transport throws 9 (34), (35), the transport bells 1 to (37), the constant speed device (38), etc. The drive system is driven by the main motor (M).
IVI) uses AC IAr, a cyclic motor that runs at a constant speed depending on the frequency of the power supply.Furthermore, the running 4f optical system (20) uses a speed controllable DC motor (Ml ), and is configured mechanically independently from the main WAuJ system. The main sweater (M) starts rotating, and the main drive system 1-17IJ including the photosensitive drum (11) is driven by 1.

This Jl, same as 11, II, or the convex time Jlv does not have a Jl or paper feeding IJ-ra (31), (33
) clutch is turned on and transmits the drive of the metwin motor (M) to the paper feeder rJ-ra. At the same time as feeding of paper u'5' (not shown) starts, the initial lamps (+2) and (+
4) Chargers (+3), (+5), etc. are on.'1.
ru0 Furthermore, Nooka's time 11rre toto dew)'(,
The rung (27) is lit and the direct AF and motor (
Ml) starts rotating at a predetermined speed corresponding to ′f(′ge×t/ζ), and the optical system (20) moves if: 1! in the left nodal direction in the figure as described above. ltl l, ゛1゛1glass (26) l:, manuscript (not shown)
The image is scanned one by one, and the 110 images are successively projected onto a rotationally driven drum (II) to form an electrostatic 1'M image on the surface of the drum.

The electrostatic latent image formed on the Numata drum (11) and 1-11 is as follows.

As the drum 7, (II) rotates, it passes through the developing device (16) and is developed, and after one and a half rotations, it is transferred to the transfer charger (+7), fl<0-. Horn,
The copy paper fed by the paper feed roller (31) or (33) is passed through the timing roller (36) until it reaches -"1".
When the timing roller (36) is driven by the timing signal outputted in synchronization with the image forming operation on the 1:1 photoreceptor drum (11), 11 steps are performed.
) is sent between the body drum (11) and the transfer charger (17), and the 1-record drum (11
) The appearance of surface 1 is transferred to the drum (11) after the image is transferred, and then transferred to the conveying roller (37).
, and is taken out of the aircraft via the device (38), etc.

In Figure 2, (1) is a scanning system including a 1:((S1 system), (Ml) is a self-current motor, and the scanning light (1) is
1 drive round trip with white flow motor (Ml)! In other words, go in the direction of arrow (A) (hereinafter referred to as scan), and go back in the opposite direction! , lrI (hereinafter referred to as return) (2) is an encoder composed of a Hall element, and is installed at the M rotation axis of the DC motor (Ml).
゛j' and generates a pulse signal proportional to its rotational speed. Therefore, the $aJ distance r of the scanning system (1) is
It is possible to detect the speed of the scanning system (1) at the pulse interval. ○ (5W-H) is a home switch that detects whether the scanning system (1) is at the home position (scan start position). It detects it and emits a tokyon signal at the home position, otherwise it emits an off return signal.

(5W-8) is a brake switch, which detects the position of the control base P1 (position 1!11) for the scanning system (1) as described below. A control device 1'2 for reciprocating the scanning system (+) emits an on signal and an off signal in other cases.
It shows the 1'114-formation of.

(3) is the microcomputer that is the center of R+lI groaning.
It is composed of a read-out memory for storing braking control data, a removable random access memory, a read-only memory, an 8-pit internal capacitor, an input/output board, etc.

(4) is a waveform shaping circuit that converts the pulse signal of the encoder (2) into a square wave, and
The signal is input to the microcombi-tar (3). (
5) is the reference oscillation/circuit, and when the encoder pulse signal is I
R] A microcomputer (8)K generates a fixed frequency reference pulse for measuring the interval. The microcomputer (3) counts the pulses from the C0 oscillation circuit (6) to this base using an internal counter, iL, and calculates the DC mode (
The rotation speed of Ml), that is, the speed of the scanning system (1) is calculated. (6) is a curved motor control circuit, which turns on and off the current supply to the DC motor (Ml) at minute intervals of time il1 based on the signal from the microcomputer (3). Q-switching is achieved by adjusting the AVJ time, and increasing the on-time increases the speed.
Shortening the on time will slow down the speed. This speed control method is disclosed in Japanese Unexamined Patent Publication No. 59-7357, so a detailed explanation thereof will be omitted.

Now, in the above-mentioned copying machine, in order to obtain the control gutter of the scanning system in the actual copying operation, the scanning system is moved back and forth as a test after electricity is turned on and prior to the copying operation. It is very dangerous if the scanning system suddenly becomes energized and begins test movement at high speed while you are working on the scanning path.Therefore, the Iyl of this model is set to -2 after turning on the power and before the test reciprocation. This is intended to prevent the Jf failure as described in 1° by setting the scanning system at a low speed in advance #=fth, and this control Ql will be explained using the flowchart of FIG.

In the microcomputer (3), when the power is first turned on, the internal parameters are initialized in steps 1 and 2, and the scanning system (1) is returned to the home position 11 in step 3. The subroutine (IIOME) is processed to ensure that the running Ilf system (1) is placed in the home position (IIOME).
(scan start position).

Next, perform the subroutine (5CAN: A) at step ■.
) is processed, the meandering motor (Ml) is set in constant speed forward rotation mode, the speed data is set, and the preliminary movement 1 of the scanning system (1) is performed.
Start σno. The speed at this time will deviate from the normal scan speed, but the brake switch (SW-B ) is turned on, and when it is determined that l'7Esj, the constant speed control in the scanning direction is finished, and in step ■, the scanning system (+) is returned to the normal position by the subroutine (HOME), and the preliminary fJ4flJ end. In addition, in the subroutine (noMt<) of step ■ and step ■, the movement speed of the scanning system (+) is changed to -ribroutine (5CAN
: The moving speed is the same as in A).
AN: R) is processed and the scanning system (1) is constant 4 (
Perform a test scan at a speed of about 500rrun/S). Furthermore, in step ■, the routine (RETVRN)
is processed.

The scanning system (
1) returns to the home position and reads the data for the next actual copy scan.

In step (2), data such as copy magnification and scan size are input, and then data input is repeated until the scan code is input manually. When a scan signal is input, the
rYEsJ is determined in step ■, and a subroutine (SCAN) is executed in step [phase] based on the newly read data.
:C) is processed and performs the actual compound 'guess A1', and in step 0, the subroutine (1 'I' 11 '<N
, ) is processed, and the ten system (1) returns with the home bononyon move 12, and after 0, which ends the multi'ge movement, steps , B ~ ~ σp are repeated according to the number of returned 'ges. 〇(Second 1. Sea urchin,
When sea 1 becomes energized in January from Thursday, it will be 4゛111゜1.
-Left, (1) is 賎-A) rib 7 (5'/)ru/complement, adjustment or it fj' (j l'l!)),,
'H suddenly 11η electric □j, I; i, j! ：Nini-・terunr ``The system (1) moves/e 1---c is also dangerous, such as Libisonno, I can understand 1, l''l'i 1g1li
ll + (, 1, /, l ′J: 〈natural prevention 1] 2
In this embodiment, as a preliminary movement of the scanning system (1), the
After turning on (SW-H), the power is restored with the horn button, but this knob method is limited to 11, and the timer allows the power to be reset. (It may be something like "warping" the return timing.
Since the scanning system is preliminarily moved at a speed lower than the initial movement speed, service personnel and the like can recognize the danger even if it suddenly becomes energized during adjustment or repair, and accidents can be prevented.

[Brief explanation of the drawing]

Figure 1 shows λ toke 11;l! to which the present invention is applied. Figure 2 is a perspective view of the scanning system, Figure 3 is a block diagram of the control means, Figure 4 is 1.
Town 1 "Step Flowchart 1 Diagram 〇(1)...Scanning system, (2)...Encoder, (3)...
・Microcomputer, (10)-=Scanning JII'1 copying machine, (M+) ・・
・li"1MF, motor, (5W-B) Gray Kisinochi, (SW-II)... Baum switch. Applicant: Minolta Camera Co., Ltd. B 0 shakuguchi

Claims (1)

[Claims] 1. In a scanning copying machine in which the scanning system is reciprocated as a test at the same time as the power is turned on, the scanning system is preliminarily moved at a speed lower than the movement speed during the test t1 return m+start rift of the scanning system. : An optical system control method for a scanning copying machine characterized by: