JPS5853374B2 - electronic printer control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic printer control device that controls a printer using a processing device that executes a program.

Generally, this type of electronic printer control device has an electronic circuit including a servo control system for positioning the carriage and a servo control system for selecting characters to be printed.

In such an electronic printer control device, when positioning the carriage or selecting characters to be printed, the processing device uses an output command to calculate the amount of movement from a predetermined reference point to the next position in the electronic circuit. It is given in absolute amount.

On the other hand, when controlling mechanical systems such as a printed character selection mechanism and a carriage mechanical unit, the electronic circuit used in this type of control device speeds up the movement of the mechanical system when the distance to the target position is large. In addition, it is configured to have a control function that slows down the speed when the target position approaches.

Therefore, conventionally, the electronic circuit of an electronic printer control device has a register that holds the absolute amount of movement given from the processing device, as well as a register that detects the current position during the movement, and calculates the amount of movement relative to the absolute amount of movement from a reference point. Usually, the vehicle is equipped with an arithmetic circuit for determining the moving speed.

An object of the present invention is to provide an electronic printer control device that can control an electronic printer using simple hardware.

Another object of the present invention is to provide an economical electronic printer control device using a so-called integrated circuit microprocessor as a program processing device.

According to the present invention, the present invention includes a processing device having a function of executing a program, and an electronic circuit section that receives an output command from the processing device and controls a printer, and the processing device instructs the amount of operation of the printer. On the other hand, when the processing device instructs the amount of operation of the printer, the electronic circuit section retains the amount of operation, and each time it receives a unit operation end signal from the printer, it outputs one unit. A counting circuit that decreases the number by a number, a conversion circuit that receives the output of the counting circuit and converts the output of the counting circuit into a speed signal amount, and a circuit that drives the printer based on the speed signal amount, the counting circuit An electronic printer controller is provided which is configured to generate an interrupt to the program upon detection of a zero.

In the present invention, a so-called integrated circuit microprocessor is used as a processing device, and this processing device interprets codes or sequence codes to perform code conversion functions, diagnostic functions, horizontal and vertical tabulation, ribbon switching, absolute By performing so-called functional operations such as tabulation by specifying a position, it is possible to configure an electronic printer control device that can control a printer with a small number of hardware logic circuits.

This will be explained below with reference to the drawings.

FIG. 1 is a block diagram showing an example of a conventional electronic printer control circuit under program control.

When an output command is given from the processing device 1 to the electronic circuit section 2, the electronic circuit section 2 controls the mechanical unit 3 in accordance with the output command.

Furthermore, when the carriage is at a desired position, the electronic circuit section 2 drives the printing character selection mechanism 310 and also drives the printing character selection mechanism 310.
a printing character selection control system 2a that drives the marking mechanism 320;
The carriage position control system 2b that drives the carriage mechanical unit 330 to position the carriage is provided.

First, when a character to be printed is selected and a printing operation is executed when the carriage is at a desired position, the processing device 1 records the absolute rotational movement amount from the reference point in the absolute movement amount register 201 of the print character selection control system 2a. give.

On the other hand, the movement amount counter 202 stores the current amount of rotational movement of the printed character, and the arithmetic unit 203 compares the output of the absolute movement amount register 201 and the counter 202 to obtain relative movement amount, that is, relative position information. is sent to converter 204.

This converter 204 is a circuit that converts the given relative position information into a speed signal, operates the printed character selection mechanism 310 at different speeds depending on the amount of relative movement, and stops the selection operation quickly and without vibration. , the speed signal converted by this converter 204 is supplied to a converter 205.

The converter 205 converts the speed signal into voltage, and then drives the driver 206 to operate the print character selection mechanism 310.

The operating state of the printed character selection mechanism 310 is determined by the sense amplifier 20.
7, and the operation amount counter 202 is updated via the sequence comparator 208 every time a unit operation is completed.

The arithmetic unit 203 constantly compares the outputs of the register 201 and the counter 202, and when the relative movement amount becomes 0, it detects this and provides a signal 14 to the non-numeral drive control circuit 209.

When the carriage movement end display 13 is on, the printer drive sub-control circuit 209 gives an output 15 to the driver 210, causing the printer mechanism 320 to execute a printing operation.

When sufficient time has elapsed to complete the hammer operation, the hammer drive control circuit 209 turns on the hammer end display 16 and notifies the program of the processing device 1.

When the program detects the hammer end indication 16, generally in order to move the carriage, it instructs the absolute movement amount register 221 of the carriage position control system 2b as the next carriage position by the absolute movement amount from the reference point.

The movement amount counter 222 shows the current position of the carriage, that is,
Since the current absolute amount is held, the arithmetic unit 223 compares the outputs of the register 221 and the counter 222 and sends the relative movement amount, that is, relative position information to the converter 224.

The converter 224 operates the carriage mechanical unit 330 at a high speed when the amount of relative movement is large, and at a slow speed when it is small, and converts this relative position information into a speed signal in order to stop the movement of the unit 330 quickly and without vibration. Convert to

The converted speed signal is converted into a voltage in converter 225 and then drives driver 226 to operate carriage mechanical unit 330.

The operating state of this unit 330 is monitored by the sense amplifier 227, and the operation amount counter 222 is updated via the sequence comparator 228 every time a unit operation is completed.

The arithmetic unit 223 constantly compares the outputs of the register 221 and the counter 222, and when the relative movement amount reaches O, turns on the carriage movement end display 13 and reports it to the processing device 1.

The movement amount counters 202 and 222 described above are binary counters, and the absolute movement amount registers 201 and 221 are also registers that store binary information.

Furthermore, arithmetic units 203 and 223 are circuits that perform binary operations.

FIG. 2 is a diagram for explaining changes in the speed signal, where the solid line shows the relationship between the relative movement amount and the corresponding speed signal, and the broken line shows the relationship between time and speed.
This is the actual velocity curve when starting from .

As is clear from the figure, the speed signal changes discontinuously as the relative movement amount decreases.

FIG. 3 is a block diagram showing an embodiment of the present invention, and this embodiment includes a program processing device 301 and an electronic circuit section 3.
02, thereby controlling the mechanical unit 303.

Here, the case where the servo system mechanical unit 303 is moved by P will be described with reference to FIG. 2 as well.

The program processing device 301 uses the counter 30 according to an output command.
Set the value of P to .

Therefore, the set value C of the counter 30 is P in the initial state.

The converter 31 that converts the relative movement amount into a speed signal implements the conversion table shown in FIG. 2 using a read-only memory, and converts P into a speed signal using the output of the counter 30 as input.

When this set value P has a relationship of P5≧P>P4,
As shown in FIG. 2, a speed signal V4 is sent out from the converter 31, and this speed signal v4 is converted into a voltage value by the converter 32.

The driver 33 is driven by this voltage value, and the mechanical unit 303 is operated.

The amount of movement of the mechanical unit 303 is detected by the sense amplifier 34, and the amount of movement of the mechanical unit 303 is detected by the sense amplifier 34. For example, each time the carriage moves by one pitch, a unit movement end detector 35 sends a signal to the counter 30.
An end signal 36 is applied to the counter 35, and the set value of this counter 35 is decremented.

Each time the counter 30 receives the end signal 36, the set value C is decremented by one, thereby continuously decreasing the next instructed relative movement amount.

On the other hand, the speed signal value which is the output of the converter 31 changes discontinuously in a stepwise manner and decreases as shown in FIG.

That is, when C=P4, the speed signal value changes from v4 to ■
, changes to.

Similarly, as the mechanical unit 303 operates,
Counter c=p1-=o.

At this time, the speed signal becomes 0, the driver 33 does not drive the mechanical unit 303, and the mechanical unit 303 is in the vicinity of Pl.

Stops without vibration. When the set value C of the counter 30 becomes O, the control circuit turns on the interrupt signal 37 and the processing device 3
01 and reports the completion of the operation.

When the processing device 301 detects the end of the operation, the program sets the amount of movement in the counter 30 in order to instruct the next operation.

The circuit shown in FIG. 3 can be applied to either the carriage position control system or the print character selection control system shown in FIG.

FIG. 4 is a block diagram showing a control circuit for an electronic printer using the circuit shown in FIG.

Referring to FIG. 4, similarly to FIG. 3, a program processing device 301, an electronic circuit section 302, and a mechanical unit 303 controlled by these are shown.

Further, the electronic circuit section 302 includes a print character selection control system 3a and a carriage position control system 3b, and the mechanical unit 303 includes a print character selection mechanism 310, a hammer mechanism 320, and a carriage mechanical unit 330.

Parts corresponding to those in FIG. 3 are given the same reference numerals, parts belonging to the print character selection control system 3a are given a, and parts belonging to the carriage position control system 3b are given b.

First, when a printing character is selected and a printing operation is performed, if the carriage is at a required position, the processing device 301 gives a relative movement amount to the counter 30a of the printing character selection control system 3a.

This relative movement amount is converted into a speed signal by a converter 31a,
After being converted into a voltage amount by the converter 32a, the driver 33a
and operates the print character selection mechanism 310.

The amount of movement of the print character selection mechanism 310 is determined by the sense amplifier 34a.
Each time a unit operation is completed, a unit operation end detector 35a sends out an end signal 36a through the unit operation end detector 35a to decrement the counter 30a.

When the value of the counter 30a becomes 0, an interrupt signal 37a is given to the processing device 301, and this interrupt signal 37a is sent to the gate circuit 41 via the differentiating circuit 40.

The counter 3 of the carriage position control system 3b is connected to the gate circuit 41.
If the carriage movement end display 37b is displayed from 0b, an output is sent from the hammer drive control circuit 42 to the driver 43, and the hammer mechanism 320 is activated.

When sufficient time has elapsed to complete the hammer operation, the hammer drive control circuit 42 displays a hammer end display 44 on the processing device 30.
Give to 1.

When the processing device 301 detects the hammer end indication 44, it gives the relative movement amount of the carriage to the counter 30b,
As in the case of the print character selection control system 3a, the operation of the carriage mechanical unit 330 is controlled.

When the value of the counter 30b becomes 0, the carriage movement display 3
7b to the processing device 301.

As described above, according to the present invention, functions such as storing the absolute amount of movement are performed by the program of the processing device, so instructions can be given to the hardware logic circuit by the amount of relative movement, and the logic circuit can be easily configured. It can be configured as follows.

Therefore, in hardware logic circuits, it is possible to easily perform functional operations that require expensive circuits by interpreting codes or sequence codes.

[Brief explanation of the drawing]

Figure 1 is a block diagram showing a conventional electronic printer control circuit, Figure 2 is a diagram showing the relationship between the relative movement amount for operating the servo system and the speed signal, and the actual movement of the servo system. FIG. 3 is a block diagram showing an embodiment of the present invention, and FIG. 4 is a block diagram showing an electronic printer control device using FIG. 3. Explanation of symbols, Figure 3, 301 Niprogram processing equipment, 3
02: Electronic circuit section, 303: Mechanical unit, 30: Counter, 31: Relative movement amount: Speed signal converter, 32: Speed signal: Voltage converter, 33 Nido 7/I' bar, 34: Sense amplifier, 35 :Unit operation end detector.

Claims (1)

[Claims] 1 Provide the function to execute the program and output command,
and a processing device having a function of instructing the amount of operation of the printer, and when the amount of operation of the printer is instructed by the output command of the processing device, the amount of operation is held and the amount of unit operation from the printer side is stored. A counting circuit that decrements by ■ each time an end signal is received, a conversion circuit that receives the output of the counting circuit and converts the output of the counting circuit into a speed signal amount, and a circuit that drives the printer based on the speed signal amount. An electronic printer control device, characterized in that the electronic printer control device is configured to generate an interrupt to the program when the counting circuit is at O.