JPS58151269A - Digital printer control system - Google Patents

Abstract

PURPOSE:To obtain the titled system which can be made to be compact, light weight, and inexpensive, by providing two register circuits which determine whether printing is performed or not based on signals of registers whose number corresponds to the number of the digits of a printing drum, and alternately operating or transferring the register circuits. CONSTITUTION:The register circuits A and B determine whether the printing is performed or not based on the signals of the registers whose number corresponds to the number of the digits of the printing drum. Said registers are alternately operated and the time for writing information is delayed. The time period between a printing timing signal and a printing timing signal is made to be a time period for rewriting printing data from other devices. Thus the occupation of the processing time is released, and the simple, compact, inexpensive digital printer control circuit is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to digital printer control, and more particularly to a control method using two registers for a digital printer that reduces print data rewriting time.

゛The first block diagram of a conventional digital printer control circuit is
As shown in the figure. However, digital printers have 16 digits,
The 1st and 16th digits indicate the circuit, and the 2nd to 1st digits of the same circuit.
The control circuit in the fifth digit is omitted.

It receives an ls signal from another device via a terminal TI, controls a motor drive circuit 1, and rotates a motor 2 of the printer.

In addition, 8% of the print data for one line of printing is stored in the register circuit 3.
Cr) code from another device via terminal T2. When the printing drum rotates twice, the printing control circuit 4 is activated.
TP sent from the printer via terminals TP and RP
The double signal RP signal is converted into B and CD codes by the code conversion circuit 5, and the print drum position information is transferred to the print control circuit 4.

The print control circuit 4 compares the code conversion output with the output of the register circuit 3, and outputs a logical level 1 from the print control circuit #64 if they match, and transfers the output to the NAND circuits 6 and 7. Further, while the signal A output from the code conversion circuit 5 is at logic level 1, the NAND circuit 6. The output of i becomes a logic level O, and the print hammer solenoid is energized to operate the print hammer.

Therefore, the circuit is composed of a register circuit 3, a print control circuit 4, and a code conversion circuit 5, and uses multiple axes and many components.1. Because of this, the equipment was not only large and expensive, but also had many failures.

The present invention makes it possible to detect print timing signals and print start signals without occupying other devices, and provides simple, compact, and inexpensive digital printer control by providing a register circuit that stores data for one line of the print drum. To provide the circuit.

In addition, conventionally, other devices could only control digital printers using complex control circuits, but the pulse width of the print timing signal output from the digital printer was 0Bq.
This is because the detection of the print timing signal and the rewriting of the print data occupy the processing of other devices because the time is as short as nS. The period of the print timing signal is as long as 16 m5, and the period between the print timing signals is used for printing from other devices. j7 However, the period between the print timing signals is the type hammer activation solenoid energization time, so now (b)
The data to be printed is already being energized, and during this time the data to be printed next time must be accumulated. Therefore, now (b) a circuit that accumulates the data to be printed (print register circuit)
and a circuit (buffer register circuit) for accumulating data to be printed next time. By connecting these two register circuits, the following circuit operates as a buffer register circuit.

(2) A method in which a buffer register circuit and a print register circuit are connected in series, and a print timing signal is transferred from the buffer register circuit to the print register circuit for printing.

The present invention will be explained in detail below with reference to embodiments shown in the drawings.

FIG. 2 is a block diagram of a control system for a digital printer that alternately uses the outputs of two register circuits according to the present invention. ! Figure 3 is an exploded view of the print drum of the digital printer according to the present invention, with 13 lines.

An example of 16 digits is shown. Figure 4 is a timing chart output from the digital printer according to the present invention, which is a TP multiplied signal T? of the print drum position signal. It is a timing chart of signals A, R, and C output from the P signal and the wave V/change circuit. -j The R and P signals are from the print drum 1 shown in Figure 3.
The transition area from the 3rd line to the 1st line is a signal that is output when the printing hammer is communicated, and the TP double signal signal is output when the transition area of each line of the printing drum is outputted when the printing hammer is connected. Atsushi 4
Signal A in the figure.

Signal A is the waveform converted from the R and C drum position signals.
is the printing hammer solenoid timing, and the energization time is shown in the shaded area. Signal B is a signal sent to other devices, and is the timing for sending data on the first line of the print drum. Signal C
is a signal sent to other devices and indicates the data sending timing from the 2nd line to the 13th line of the print drum. After receiving signal B, the other device determines whether the fourth arm is transmitting data based on the number of times the logic level of signal C changes.

The operation of the digital printer control system will now be explained using FIG. 16-bit print data is sent to terminal T4. from another device via terminal T2. 7 clock signals -MA, R to register circuit A through terminal T3.

Transfer all 16 bits of BK to logic level 0 and initialize the register circuit. The register circuit has a 16-bit latch circuit, and the 16 bits correspond to the solenoid for the printing hammer, and the logic level 1 is information indicating that the printing hammer is operating, and the logic level 0 is information indicating that the printing hammer is not operating. Next, start the motor drive circuit from another device via terminal T1.
Rotate the pudding motor. The print drum rotates due to the morph rotation, and a TP multiplied signal P signal is sent out from the printer. The signal A1B%C is outputted from the waveform conversion circuit by TP and RP numbers, and is transferred to other devices via terminals T5 and T6. When the other device receives the signal B twice, it determines that the motor is rotating in a circular motion, and the third time it transfers the 16-bit data of the first row of the drum and the clock A signal to the register circuit A. The output of the register circuit A is transferred to the three-man NAND circuits 8 and 9, but since the signal C is at logic level 0, the output of the three-man NAND circuits 8 and 9 becomes logic level 1, and the AND circuit 1 (1, The output of 11 is at logic level 1 and the printing hammer solenoid is connected to the printing hammer solenoid is'+. is omitted.When the print drum moves to the first line, the signal C
becomes logic level 1, and when the output of register circuit A is logic level 1, the output of the three manual NAND circuits 8 and 9 becomes logic level 0 and =h while the signal of the waveform conversion circuit output is logic level 1. The outputs of the AND circuits 10 and 11 become logic level 0, and the printing hammer solenoid is energized to perform printing. Another device changes the logic level of signal C from 0 to 1.
As a result, 16 bits of data on the second line of the print drum and clock B are transferred to register circuit @B. The output of the register circuit B is transferred to the three-man NAND circuits 12 and 13, but the level of the signal C is inverted by the inverter circuit 14.
0, the outputs of the three manual NAND circuits 12 and 13 become logic level 1, and the printing hammer solenoid is not energized, but the printing hammer solenoid is energized by the output of the register circuit 1 path A. Print drum transitions to the second line 1,
When the signal C becomes logic level 0, the inverter circuit 1
4, and when the output of register circuit B is logic level 1, while the logic level of signal A is 1, the output of the three-man NAND circuit 12, L( becomes logic level 0, and the output of AND circuit 10, The output of It is set to logic level O, and the solenoid for the printing hammer is energized. Also, the three-man NAND circuits 8 and 9 do not energize the solenoid for the printing hammer because the signal C is at the logic level 0. The same is true up to the 12th line of the printing drum. The operation is restarted.When the other device receives the signal -@B, it transfers the 16-bit logic level 0 to the register circuit B, and transfers the data to the register circuit A at the point where the logic level of the signal C changes from 0 to 1. A 16-bit logic level 0 is transferred, the initial state is returned, and printing for one line is completed.

As another method, a block diagram of a control method for a digital printer that performs printing by installing a buffer register circuit and a printing circuit shown in FIG. 5 is shown. First, an initial signal is sent from another device via the terminal T7 to set the outputs of the buffer register circuit and print register circuit to the initial state of logic level 0. Next, the motor drive circuit is activated via the terminal T1 [2]. The TP double, RP double, and signals A, R, and C are the signals shown in the timing chart shown in the ff4 diagram, as in the previous method. Data transfer from other devices is performed in the same way as the previous method. Figure 5 of the housing shows 1 of the solenoid energizing circuit for the printing hammer.
The circuits on the 155th line are omitted from the 2nd line. When another device receives signal B, it sends 16 bits of data from the first row of the print drum to the buffer register circuit to data terminal T.
Transfer via 2.

Next, at the point where the signal A of the waveform g* circuit output changes from logic level 0 to 1, the output of the buffer register circuit is transferred to the print register circuit, and when the output of the print register circuit is at logic level 1, the inverter circuit 15, 16, the printing hammer solenoid starts to be energized. Further, at the point where the logic level of signal A changes from 1 to O, the print register rL:11 path is brought to the initial state, and the energization of the print hammer solenoid is stopped. At the change point from logic level O to 1 of signal C, 16 bits of data from the 1st line of the other device line printing drum is transferred to the buffer register circuit.
When the operation is repeated and another device receives signal B [7],
Data 16-bit logic level 0 is converted to signal C logic level 0.
At the change point from 1 to 1, 16-bit logic level 0 data is transferred to the buffer register circuit to set it to an initial state, and the printing operation for one line is completed.

As stated above. According to the present invention, by operating the two registers alternately or transferring them, the number of multiplex components is reduced to one-third of the conventional one, and power consumption is reduced to about one-fourth.
Therefore, there is an effect that a small, lightweight, and low-cost A-leaf can be easily obtained.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional digital printer control system, FIG. 2 is a block diagram of a digital printer control system in which two register circuits according to the present invention alternately operate as a print register circuit and a buffer register circuit, and FIG. 3 Figure 4 is a development diagram of the printing drum of a digital printer, and Figure 4 is a timing chart showing the printer output driver position signal.
FIG. 5 is a block diagram showing a control system for a digital printer that is equipped with a buffer register circuit and a print register circuit and performs printing by shifting 17 according to the present invention. Code explanation 1000 Motor drive circuit 2...■Motor 3.
...Register circuit 4...Print control circuit 5...0 code conversion circuit Fig. 3 Fig. 4 'Excuse ε

Claims (2)

[Claims] (1) In controlling a digital printer that rotates the printing drum and performs impact printing with a type hammer, a register circuit is used to decide whether or not to print based on signals from registers whose number corresponds to the number of digits on the printing drum. A control method for a digital printer, characterized in that two registers are provided and the time for writing information is extended by operating the registers alternately. (2) A buffer register circuit and a print register circuit are connected in series 1/% The time for writing information to the previous station buffer register circuit is extended by transferring the contents of the buffer register circuit to the print register circuit. Do 1
Control method of digital printer described in section.