JPS61110561A - Printer controller - Google Patents

Abstract

PURPOSE:To eliminate the need for a special signal line for a signal indicative of a condition where printing can be performed, by providing a printer- controlling part with a means for detecting said condition of the printer on the basis of the presence or absence of a dot timing signal outputted from the printer. CONSTITUTION:When demand for printing is generated in the printer-controlling part 20, a signal for driving a motor in the printer 1 is first outputted to a motor-controlling signal line 5. When rotation of the motor is started and the rotation becomes stable after a predetermined period of time, a timing signal is outputted through a timing signal line 7 to be impressed on a controlling part 2. Simultaneously, the timing signal is impressed on a discriminating means 9 for discriminating whether or not printing can be performed, and it is discriminated that printing can be performed. Where printing can be performed, the part 2 outputs a desired printing head driving signal to a printing head driving signal line 6 in accordance with the timing signal to cause the printer 1 to print data according to the signal. Accordingly, there is no need for a special signal line for the signal indicative of the condition where printing can be performed, and the number of cables required can be reduced by that much.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a printer control device used in a dot impact type printing device.

Configuration of conventional examples and their problems In all conventional printer control devices of this type, as shown in FIG. A separate printable signal line 3 is provided to always see through the presence or absence of the printable signal. Therefore, in this type of printer, the power supply line 4. which supplies power to the printer 1. Motor control signal line 15 for controlling the motor in the printer 1
゜Print head drive signal line 6 for driving the print head, timing signal line 7 for seeing through the movement timing of the print head, and seeing through whether the print head has reached the initial position (left edge of the paper) Including the reset signal line 8, a total of 6 sets of signal lines are connected to the printer 1.
and the control section 20, and there was a problem in that the cable needed to connect the two was correspondingly large.

OBJECTS OF THE INVENTION The present invention obviates the above-mentioned drawbacks of the prior art, and it is an object of the present invention to provide an excellent printer control device that is simple in construction and does not require a dedicated printable signal line. .

Structure of the Invention The present invention uses a dedicated printable signal line without K, so that when a timing signal for seeing the movement timing of the print head is transmitted from the printer, the printer determines that the printer is ready for printing. It is structured so that it does not require .

DESCRIPTION OF THE EMBODIMENT FIG. 2 is a schematic configuration diagram of an embodiment of the printer control device of the present invention, and in the figure, the same reference numerals as in FIG. 1 indicate the same components as in FIG. 1. . Printability determining means 10 receives a timing signal applied to the control unit 2 through the 9-digit timing signal line 7 and determines that printing is possible based on the presence of the timing signal.
This is a printable signal line that transmits the output of the printable determining means 9 to the control section 2.

Note that the control unit 2. The printability determining means 9 is constituted by a microcomputer or the like, and constitutes the printer control section 20.

In the embodiment 11, it is assumed that a print request is now issued to the printer control unit 2°. When a printing request is issued to the printer control section 20, first, a signal for driving the motor in the printer 1 is output to the motor control signal line 5. Therefore, the motor starts driving in this state (step 11 in FIG. 3).

When the motor starts rotating and stabilizes after a certain period of time (step 12 in Figure 3), a predetermined timing signal is output from the timing signal line 7.
In step 13) of FIG. 3, this is applied to the control section 2. At the same time, the timing signal 1. is applied to the printability determining means 1), which determines that printing is possible (
Step 171 in FIG. 3). If printing is possible, control unit 2
l', Al: Outputs the print head drive signal at 9I to the print head drive signal line 6 in accordance with the timing signal, and causes the printer 1 to print the data corresponding to each print (as shown in Fig. 3). Step 16). Then, a process is performed in which printing is not possible and the lifting operation is disabled (step 17 in FIG. 3), and then the motor of the printer 1 is stopped (step 18 in FIG. 3).

As described above, according to the above embodiment, it is configured to determine whether or not the printer is in a printable state depending on whether or not there is a timing signal that indicates the movement timing of the print head. Therefore, there is an advantage that a special printable signal line is not required, and the number of cables connecting the printer and the control section can be reduced accordingly.

Effects of the Invention As is clear from the above embodiments, the present invention is provided with means for detecting the printable state of the printer based on the presence or absence of a tod timing signal output from the printer in the printer control unit that controls the printer. Therefore, there is no need to provide a special printable signal line between the printer and the control unit, and there is an advantage that the cable connecting the two can be made simple.

[Brief explanation of the drawing]

FIG. 1 shows a schematic configuration of a conventional printer control device. FIG. 2 shows a schematic configuration of an embodiment of the printer control device of the present invention. FIG. 3 shows the operation of the same embodiment. It is a flowchart figure. DESCRIPTION OF SYMBOLS 1...Printer, 2...Control unit, 9...Printability determining means, 20-Printer control unit. Figure 1

Claims (1)

[Claims] 1. A printer control device, characterized in that a printer control unit that controls the printer is provided with printability determining means for determining a printability state of the printer based on the presence or absence of a dot timing signal from the printer.