JPH04301480A - Passbook printer - Google Patents

Abstract

PURPOSE:To carry out bidirectional printing at the highest speed possible with current temperature and process speedily by controlling adjustable speed of a print head based on detecting output of a temperature sensor. CONSTITUTION:Based on detected temperature information of a print head, the highest printing speed possible with this temperature is calculated by referring to a table or by the approximation calculation. A data necessary for controlling adjustable speed of the print head is calculated from the obtained highest printing speed and a predetermined number of steps necessary for adjusting the speed. The data necessary for controlling the adjustable speed of the print head becomes a characteristic of pulse speed versus time, which is supplied to a printer 5 through a print controller 4. Since the data necessary for controlling the adjustable speed of the print head is an optimum data calculated from the temperature of the print head, it is not necessary to print on one direction or to stop in order to cool the print head, and printing can be done always on both directions, thereby enabling high speed processing.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bankbook printer having an improved method of controlling the acceleration/deceleration speed of a print head.

0002

2. Description of the Related Art In conventional passbook printers, when the print head reaches a high temperature range, bidirectional printing is switched to unidirectional printing in order to cool the print head. Furthermore, when the temperature reaches the extremely high temperature range, printing is temporarily stopped until the print head returns to the high temperature range. That is, as shown in the flowchart in FIG. 3, the data necessary for acceleration/deceleration speed control is uniquely determined, and even if the temperature of the print head is detected by the temperature sensor, it is not possible to set the printing direction of the print head in both directions. , either to set it to one direction or to stop printing is simply selected.

0003

[Problems to be Solved by the Invention] Conventional passbook printers have only one type of data for controlling acceleration/deceleration speed, so when printing in one direction or stopping printing, the processing speed decreases and the processing speed decreases. There is a problem in that the system is stopped and operational operations are disrupted.

The present invention has been made in view of the above problems, and an object of the present invention is to increase the processing speed by always allowing printing in both directions (shortest distance).

[0005]

[Means for Solving the Problems] In order to achieve this object, the passbook printer of the present invention includes a temperature sensor that detects the temperature of the print head, and an acceleration/deceleration speed of the print head based on the detected output of the temperature sensor. The apparatus is configured to include a control means for controlling the apparatus.

[0006]

[Operation] In the passbook printer with the above configuration, the acceleration/deceleration speed of the print head is controlled based on the detection output of the temperature sensor, so printing can be performed in both directions (shortest distance) at the maximum speed possible at the current temperature. It becomes like this.

[0007]

Embodiments Hereinafter, embodiments of the present invention will be explained based on the drawings. FIG. 1 is a block diagram showing an embodiment of a passbook printer according to the present invention. In FIG. 1, reference numeral 5 denotes a printing unit including a printing head 6, a platen 12, a ribbon, and other mechanisms for printing on the bankbook 13; 4, a print control unit that controls the printing unit 5; and 3, the bankbook 13. 2 is a transport control unit that controls the transport motor 3, and 1 is a control unit that controls each of the above parts.

FIG. 2 is a schematic diagram showing the main parts of an embodiment of the passbook printer according to the present invention. In FIG. 2, the bankbook 13 conveyed by the conveyance path 7 stops at a position where the line to be printed is between the bankbook 13 and the platen 12. The print head 6 is connected to a shaft 8 and a belt 9, and the driving force of a motor 10 is transmitted by the belt 9, and the print head 6 moves in the direction of arrow P or the direction of arrow Q. In this specification, bidirectional printing means printing while the print head 6 moves in both the arrow P direction and the arrow Q direction, and unidirectional printing means printing in either the arrow P direction or the arrow Q direction. This means printing while the print head 6 moves in one direction.

FIG. 4 is a flowchart showing a method for controlling the acceleration/deceleration speed of the print head in an embodiment of the passbook printer according to the present invention. In FIG. 4, temperature information of the print head 6 is first detected by the temperature sensor 11 attached to the print head 6 (step 21). Next, based on the detected temperature information of the print head 6, the maximum printing speed possible at that temperature is calculated (step 22). The maximum printing speed is calculated by referring to a table or by approximate calculation. Next, data necessary for acceleration/deceleration speed control (trapezoidal control) of the print head 6 is calculated from the obtained maximum printing speed and the preset number of steps required for acceleration/deceleration (step 23). The data necessary for controlling the acceleration/deceleration speed of the print head 6 has a time vs. pulse speed characteristic as shown in FIG. 5, and is supplied to the print section 5 via the print control section 4.

Since the data necessary for controlling the acceleration/deceleration speed of the print head 6 is the optimum data calculated from the temperature of the print head 6, it is necessary to print in one direction or stop printing in one direction to cool the print head 6. It is possible to always print in both directions (shortest distance).

FIG. 5 shows trapezoidal control called slow-up-down or acceleration/deceleration profile when a stepping motor is used as the motor 10. The data necessary for speed control is used.

0012

As described above, the passbook printer of the present invention includes a temperature sensor that detects the temperature of the print head, and a control means that controls the acceleration/deceleration speed of the print head based on the detected output of the temperature sensor. Since the configuration is such that the acceleration/deceleration speed of the print head is controlled based on the detection output of the temperature sensor. This allows printing in both directions (shortest distance) at the highest speed possible at the current temperature, making it possible to increase the processing speed.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a passbook printer according to the present invention.

FIG. 2 is a schematic configuration diagram showing the main parts of an embodiment of a passbook printer according to the present invention.

FIG. 3 is a flowchart illustrating the operation of a conventional passbook printer.

FIG. 4 is a flowchart illustrating the operation of the passbook printer according to the present invention.

FIG. 5 is a speed characteristic diagram illustrating the operation of the passbook printer according to the present invention.

[Explanation of symbols]

1 Control section 2 Transport control section 3 Conveyance motor 4 Print control section 5 Printing section 6 Print head 7 Conveyance path 8 Shaft 9 Belt 10 Motor 11 Temperature sensor 12 Platen 13 Passbook

Claims (1)

[Claims] 1. A bankbook printer comprising: a temperature sensor that detects the temperature of a print head; and a control means that controls acceleration/deceleration speed of the print head based on a detection output of the temperature sensor.