JPH0363752B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image forming apparatus such as a programmable copying apparatus.

Copying machines are generally equipped with a switch or variable resistor for adjusting timing information, and by adjusting the timing information using this switch or variable resistor, it is possible to adjust the paper feed registration timing, the home position adjustment of the movable optical system, or during variable magnification copying. It is configured to adjust the lens position.

Although the timing data is numerical data, this copying machine adjusts the timing data using a switch or a variable resistor, so the adjustment must be made while checking the numerical data, making the adjustment work very complicated. become.

Furthermore, timing information is composed of a large amount of data, and there is a large amount of data that needs to be changed from the original settings for adjustment or checking in the event of a failure. If a switch or the like is provided for each piece of data, the operating section will be full of switches, and it will also be extremely difficult to operate. Furthermore, since such operations are not performed frequently, it is desirable that the configuration for changing data be as simple as possible.

Another conventional technique is to store changeable timing data in a non-volatile read/write memory and to store unchangeable timing data in a read-only memory, and to specify the address of the memory by inputting the changeable timing data using a numeric keypad. It is known that the timing data can be changed by inputting the timing data using a numeric keypad (Japanese Patent Laid-Open No. 55-93162).

However, with this conventional technology, when the data in the non-volatile read/write memory becomes invalid due to reasons such as the backup power being cut off, all of the invalid timing data must be re-inputted in order to restore it. No. There is no problem if the number of timing data is small, but the number of data that must be re-input exceeds several hundred, which makes the work of setting timing data very complicated.

The present invention improves the above-mentioned drawbacks, has a simple configuration, and allows the user to freely change necessary data among a large amount of data that constitutes timing information. However, the purpose is to provide a copying device in which data restoration work is extremely easy.

FIG. 1 shows a control system in one embodiment of the present invention. In the figure, 1 is a key used to set the number of copies and change the copying machine operation timing, and manual program key 2 determines whether the 10 key input from key 1 is an input to set the number of copies or an input to change the timing. This is the key used for Step key 3 is a key for changing the command for displaying the contents of the timing to be changed in steps. The keyboard and display control circuit 4 includes a circuit that reads signals from the various keys 1, 2, and 11 and outputs them to the copying machine control circuit 10;
It consists of a circuit that outputs the display data outputted from the set counter to the display 12 of the set counter (or the display 13 of the copy counter) at a certain timing. The command display control circuit 5 is a circuit that converts data from the copying machine control circuit 10 into character codes and displays the data in a timely manner (dynamically).
The first storage device 6 stores timing data set in advance. It is read-only memory. The second storage device 7 is a random access memory that stores changeable timing data including timing data input from the 10 keys, and is backed up by a backup power supply 15 so that the storage state remains unchanged even when the AC power is turned off. It does not change. The control circuit 8 includes a circuit that controls storing data from the copying machine control circuit 10 in the second storage device 7 and reading data from the second storage device 7, and a circuit that detects when the AC power supply is turned off. It consists of a circuit for storing necessary data in the second storage device 7. The program set key 11 is a key used to execute a copying operation at a changed timing, and the determination circuit 14 determines whether the timing data in the second storage device 7 is valid data for executing the copying operation, for example, data other than 0. This is a circuit that determines whether it is data. The copying machine control circuit 10 is constituted by a central processing unit, and pulses are inputted from an encoder 9 interlocked with the photosensitive drum.

Next, the operation of this embodiment will be explained.

2a, 3 and 4 show each routine executed by the copying machine control circuit 10. FIG.

When the power is turned on, the step counter and the step counter are set to the address of the first command displayed by the command display control circuit 5. The copying machine control circuit (hereinafter referred to as CPU) 10 checks whether the step key 3 is pressed or not, and if the step key 3 is pressed, the value stored in the step counter indicates that the next command is stored. n1 so that it becomes the address of the first storage device 6 that has been updated, and the address of the second storage device 7 that can store the change timing data.
and n2 values (Figure 2 a2-1, 2-
(see 2). Next, the CPU 10 checks whether the step counter has reached the preset value, and if it has reached the set value, sets the contents of the step counter to the same contents as when the power was turned on (Figure 2 a2). -3, 2-4, 2-5
reference). Next, the CPU 10 causes the command display control circuit 5 to display the command stored at the address specified by the step counters in the storage devices 6 and 7 (see FIG. 2 a2-6). As a result, each time the step key 3 is pressed, commands with preset changeable timing are displayed one after another, and when the display of the last command is finished, the first command is displayed next. Here, as for displaying commands and their change timing data, as shown in FIG.
8, the command with changed timing data is displayed on the display section 16, as shown in FIG. 2c.
17 may be displayed.

Next, the CPU 10 checks whether the 10 key in the keys 1 is pressed, and if the 10 key is pressed, it checks whether the manual program key 2 is on. If this key 2 is on, the data from the 10 key is stored as data at the changed timing in the address of the storage device 7 specified by the step counter, and the data stored in this storage device 7 is displayed on the display. 18 (see FIG. 3 3-1 to 3-8). If manual program key 2 is on, CPU10
stores the data from the 10 key in the storage device 7 as the set number of copies to be made and displays it on the set counter display 12 (Fig. 3 3-9, 3-10).
reference).

Next, the CPU 10 checks whether the program set key 11 is on. This key 11
is the key that is pressed when the timing change is completed. If the key 11 is in the on state, the CPU 11 checks whether the timing data in the second storage device 7 is 0 from the output signal of the determination circuit 14,
When the timing data in the second storage device 7 is 0, the corresponding unchanged changeable timing data is transferred from the first storage device 6 to the second storage device 6.
(Fig. 3 3-11 to 3-3)
(see 21).

With the above-described operation, the operation of writing all changeable timing data, including the timing data that has not been changed, into the second storage device 7 is completed.

The CPU 10 starts the copying operation when the print key is pressed, and uses a clock counter to count pulses from the encoder 9 which is interlocked with the photosensitive drum. Then, the value of the clock counter is compared with the changeable timing data in the second storage device 7 and each timing data in the first storage device 6 (excluding those corresponding to the changeable timing data). Each part of the copying machine is turned on and off at the same timing to perform a copying operation.

FIG. 4 shows commands and timing data representing timing contents. When the power is turned on, "FEED SOL ON" stored in the first storage device 6 is displayed.
219'' command CMD1 is first displayed on display section 1.
This is a command to turn on the paper feed solenoid when the clock counter reaches the timing data 219. Now turn on manual program key 2 and press the 10 key.
If the timing data of 210 is inputted, this will be written to the second storage device 7 as changing the timing data in the command CMD1 and displayed on the display section 1.
It is displayed as 8. Next, when you press the step key 3, the "FEED SOL" stored in the first storage device 6 will be displayed.
The command CMD2 “OFF 055” is displayed on display section 1.
6 and 17, and the display section 18 does not display timing data. Command CMD2 is an instruction to turn off the paper feed solenoid when the clock counter reaches 55, and the clock counter is cleared every time a copying operation is completed. When the manual program key 2 is turned on and the timing data of 007 is input using the 10 key, this timing data is written to the second storage device 7 as changing the timing data of the command CMD2 and is displayed on the display unit 18. Ru. Next, press the step key 3 and the command CMD 3 "REGIST CL ON 005" stored in the first storage device 6 will be displayed.
is displayed on the display sections 16 and 17, and the display section 18 does not display data. Command CMD3 is a command to turn on the registration clutch when the clock counter reaches 55, and new timing data to be changed can be input in the same manner using manual program keys 2 and 10 keys. Similarly, each time the step key 3 is pressed, the changeable commands stored in the first storage device 6 are displayed one after another on the display sections 16 and 17, and after the last command, the first command CMD1 is displayed again. Manual program keys 2 and 10 display and change new timing data for these commands.
It can be entered using the keys.

As described above, the image forming apparatus of the present invention includes an input means using a numeric keypad for inputting image forming conditions such as the number of sheets to be formed, and a pulse generating means for generating pulses corresponding to the operation of the photoreceptor. In an image forming apparatus that counts pulses from the pulse generating means, compares the counted value with timing data stored in advance, and performs an image forming operation according to image forming conditions inputted by the input means. , a read-only memory that stores a plurality of first timing data regarding an image forming operation at a predetermined address for each data; and a plurality of timing data stored in the read-only memory by switching the address of the read-only memory. a specifying means for specifying one timing data of the input means, a switching means for switching the input from the input means from input of image forming conditions to input of timing data, and an address corresponding to each address of the read-only memory; a random access memory that stores second timing data input by the input means when the switching means switches to input timing data at an address corresponding to an address of the read-only memory designated by the designation means; , a backup power supply that supplies current to the random access memory so that the data stored in the random access memory is not lost; and specific data whose value cannot be used as timing data. determining means for determining whether each piece of data is the second timing data; data changing means for storing the first timing data stored at an address of the read-only memory corresponding to the address of the read-only memory; and a control means for controlling the image forming operation according to the second timing data stored in the random access memory. Therefore, you only need to specify and input the changed timing data, and the data changing means automatically transfers the unchanged data from the read-only memory in the device, making it unnecessary to input most data from the outside. The time required to change timing data can be shortened and operability improved. Further, there is no need to provide an input means for changing data for each timing data, so the configuration is simple, and more timing data can be changed with a simpler configuration. Furthermore, since a numeric keypad can be used as a timing data input means, numerical information can be input as is, and there is no need to confirm adjustment change data, improving operability. Furthermore, even if an abnormality occurs in the stored timing data, data restoration work becomes extremely easy.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a control system according to an embodiment of the present invention, FIGS. 2 a to c are flowcharts showing a step key check routine of the same control system, and diagrams showing examples of display formats. FIG. is a flowchart showing another routine of the same control system, and FIG. 4 is a diagram for explaining the same control system. 1, 2, 11...Keys, 5...Command display control circuit, 6, 7...Storage device, 10...CPU.

Claims (1)

[Scope of Claims] 1. It has an input means using a numeric keypad for inputting image forming conditions such as the number of sheets to be formed, and a pulse generation means for generating pulses corresponding to the operation of the photoreceptor. In an image forming apparatus that performs an image forming operation for the number of sheets input by the input means by counting the pulses of , and comparing the counted value with timing data stored in advance, a plurality of pulses related to the image forming operation are provided. A read-only memory that stores timing data at a predetermined address for each data; and a read-only memory that switches the address of the read-only memory to specify one timing data among a plurality of timing data stored in the read-only memory. a switching means for switching the input from the input means from an input of image forming conditions to an input of timing data; and an address corresponding to each address of the read-only memory; a random access memory that stores second timing data inputted by the input means when switching to input at an address corresponding to an address of the read-only memory designated by the designation means; and storage in the random access memory. a backup power source that supplies current to the random access memory so that the stored data is not lost; and a backup power source that supplies current to the random access memory so that the data stored in the random access memory is not lost; determining means for determining the value of each data for each data; An image forming apparatus comprising: a data changing means for storing first timing data stored in an address; and a control means for controlling an image forming operation according to second timing data stored in the random access memory. Device.