JPH06143585A - Ink jet recorder - Google Patents

Abstract

PURPOSE:To omit a panel operation at the time of setting a writing starting position by facilitating regulation of the position with a set unit of the position as a meter unit from a dot pitch and automatically calculating a conveyor speed. CONSTITUTION:An ink jet recorder comprises a keyboard 6 for inputting a speed of a conveyor 20, a width, a writing starting position of a printed matter 21, an input circuit 5, a battery backup RAM 7 for storing the speed, the width and the position, and a software 2 for calculating the speed, etc. A relative speed between a nozzle head of an ink jet printer and the matter 21, a distance from a sensor 12 for detecting the matter 21 to starting of printing are input from an input unit such as an operation panel 6, etc., as an arbitrary value (e.g. a value millimeter unit), and printed at a specific position. As a result, regulation of the starting position is facilitated, and a panel operation at the time of setting the starting position can be omitted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jet recording apparatus in which the distance from the detection of a print object to the start of printing (hereinafter referred to as the writing position) is in units of meters (hereinafter referred to as millimeters). Related to the function to set.

[0002]

2. Description of the Related Art Conventionally, when setting a writing start position, a horizontal dot pitch (hereinafter referred to as Px) is used as a unit. Therefore, the write start position is divided by Px for setting.

[0003]

An object of the present invention is to set an input unit from an input device such as a panel to a millimeter unit,
This is to enable adjustment of the printing position on the printing object in a daily sense. Further, by inputting the width of the object to be printed through a panel or the like, the relative speed between the nozzle head and the object to be printed (hereinafter referred to as conveyor speed) is automatically detected.

[0004]

[Means for Solving the Problems] The above-mentioned object is to install software for inputting a value (millimeter) of a writing start position, and then inputting a conveyor speed and a width of an object to be printed from a panel or the like and converting the count value of an internal counter. To provide,
This is achieved by providing software that automatically detects the conveyor speed by inputting the width of the print object using a panel or the like.

[0005]

[Operation] Using the input writing start position and conveyor speed, the counter setting value set in the internal counter (writing start timer) is calculated. Further, a sensor for inputting the width of the object to be printed and further detecting the object to be printed obtains the time for shielding the object to be printed from light and calculates the speed of the conveyor.

[0006]

Embodiments of the present invention will be described below with reference to FIGS.

First, the overall structure will be described.

In FIG. 1, reference numeral 1 denotes an MPU (Micropros Unit) for controlling the entire ink jet recording apparatus,
2 is a ROM (read only memory) for storing the software for calculating the writing position and data, 3 is a RAM (random access memory) for temporarily storing the data in the ink jet recording apparatus, and 4 is input from the panel A display device that displays data and print contents,
5 is the key input circuit, 6 is the conveyor speed, the width of the printed material,
A keyboard for inputting the writing start position, 7 a battery backup RAM (random access memory) for storing the conveyor speed, the width of the print object, and the writing start position, 8 a writing start timer for adjusting the writing start timing, and 9 an inkjet recording device A print control circuit for performing overall control on printing, 11 is a print object detection circuit, 12 is a sensor for detecting the print object, 14 is a character signal generation circuit for converting the print content into a character signal, and 15 is a jet of ink. Nozzle to perform, 16 is a charging electrode that turns the ink ejected from the nozzle into particles and applies a charge to the ink particles, 17 is a deflection electrode that deflects the charged ink particles, 18 is a gutter that collects ink not used for printing, and 19 is A pump for supplying the ink collected from the gutter to the nozzle again, 20
Is a conveyor, 21 is an object to be printed, and 22 is a bus line for sending data and the like.

Next, an outline of a series of operations until printing is completed will be described.

When the print object detection sensor 12 detects a print object, a print object detection command reaches the MPU 1 through the print object detection circuit 11. Upon receiving the print object detection command, the MPU 1 operates the counter set in the writing timer 8 (a counter setting value KN will be described later). When the counter of the write-out timer 8 finishes counting, a write-out timer time-up command reaches the MPU 1. Upon receiving the time-up command, the MPU 1 generates a print start command, and the MPU 1 sends the print content stored in the battery backup RAM 7 to the character generation circuit 14 via the bus line 22.
The character signal generation circuit 14 changes the sent print content into a character signal and sends it to the charging electrode 16.

The ink particles ejected from the nozzle 15 are turned into particles in the charging electrode 16 and received an electric charge, which is deflected by the deflection electrode 17, and the ink flies and adheres to the object to be printed 21 flowing on the conveyor 20 to be printed. Ink particles not used for printing are collected from the gutter 18 and supplied to the nozzle 15 again by the pump 19. The print content can be changed by changing the print content data in the battery backup RAM 7.

Next, the count of the writing timer 8 and the set value (KN) of the counter will be described. The counter value to be set in the write-out timer 8 is calculated by the formulas 2 to 4 in FIG. The write-out timer 8 counts down by this set value and, after the count ends, sends a write-out timer time-up command to the MPU 1.

Calculation formulas 2 to 4 shown in FIG. 2 will be described.

1) Description of Calculation Formula 2 ts is the time during which the inkjet prints one line of one vertical dot. To obtain this ts, 1 / f (ink particle 1
The number of thinnings M (the number of ink particles not used for printing) plus one ink particle used for printing, and Ny (the number of vertical dots) for A (to give a character width) It is obtained by multiplying by adding the number of idle dots in the vertical direction).

2) Description of Calculation Formula 3 tk is the time from when the sensor detects the object to be printed to when printing is started. This tk can be obtained by dividing L (set value of the writing position) by v / 60 (conveyor speed).

3) Description of Calculation Formula 4 KN is a counter setting value set in the writing timer 8 in FIG.

Next, a series of operations when the conveyor speed and the writing start position are manually input will be described.

In FIG. 1, conveyor speed v (m / min)
And, the writing position L (mm) is input by the keyboard 6. The input set value is stored in the battery backup RAM 7 via the key input circuit 5 and the bus line 22. The print object detection sensor 12 detects the print object, and a print detection command reaches the MPU 1 via the print object detection circuit 11 and the bus line 22. Then, the MPU 1 transfers the data of the writing position stored in the battery backup RAM 7 via the bus line 22 to the RO for storing the program.
Send to M2. ROM2 is a counter setting value (KN) to be set in the writing timer based on the calculation formulas 2 to 4 in FIG.
Is calculated and is set in the writing timer 8 via the bus line 22. The write-out timer 8 starts counting down by the "clock signal for each vertical column" output from the print control circuit. After the set value is counted down and the count ends, the write timer's time-up command is MP
Send to U1. Upon receiving the time-up command, the MPU 1 generates a print start command. Next, a series of operations for inputting the width of the printing object and detecting the conveyor speed will be described.

When the conveyor speed measurement program stored in the ROM 2 is executed, the MPU 1 measures the light-shielding time of the sensor 13 and stores it in the RAM 3. When the width of the object to be printed is input from the keyboard 6, the MPU 1 stores it in the battery backup RAM 7 via the key input circuit 5 bus line 22. The MPU 1 sends the width of the object to be printed from the battery backup RAM 7 and the light shielding time from the RAM 3 as data to the ROM 2 via the bus line 22. RO
In M2, the light-shielding time is divided by the width of the printing object to obtain the conveyor speed. The calculated conveyor speed is stored in the battery backup RAM 7. Using the conveyor speed obtained here, the ROM 2 calculates the counter setting value (kn) to be set in the writing timer based on the calculation formulas 2 to 4 in FIG. The subsequent operation is the same as the above (when the conveyor speed and the writing start position are manually input).

Next, a description will be given of the case of selecting the contents of a plurality of data (conveyor speed, width of the object to be printed, writing position are stored).

As shown in FIG. 3, there is one setting area for the data (conveyor speed, width of the object to be printed, writing position) necessary for printing, and the set value in this area is A in FIG.
A desired one is selected from a plurality of data groups such as B and C.

When the desired data is selected from the keyboard 6, the MPU 1 takes out the desired data (conveyor speed, the width of the object to be printed, the writing position) from the data group stored in the battery backup RAM 7 and is required for printing. Set in the appropriate data setting area. If it is not necessary to select the data, the values of the data setting area (conveyor speed, width of the printing object, writing position) necessary for printing are not changed and are stored as they are until the data is selected.

[0023]

According to the present invention, the writing start position can be changed from an extraordinary unit of a scan unit to a meter unit, the writing start setting can be facilitated, and an automatic conveyor speed calculation function can be added. Therefore, the work of setting the export position can be simplified.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram when a keyboard is used as an input device.

FIG. 2 is a diagram showing a basic calculation formula for calculating a counter set value.

FIG. 3 is a diagram showing an example in which one data is selected from a plurality of data groups.

[Explanation of symbols]

1 ... MPU, 2 ... ROM, 3 ... RAM, 4 ... Display device,
5 ... Key input circuit, 6 ... Keyboard, 7 ... Battery backup RAM, 8 ... Writing timer, 9 ... Print control circuit, 11 ... Printed object detection circuit, 12 ... Printed object sensor, 14 ... Character signal generation circuit, 15 ... Nozzle, 16 ... Charging electrode, 17 ... Deflection electrode, 18 ... Gutter, 19 ... Pump, 20 ... Conveyor, 21 ... Printed object, 22 ... Bus line.

Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B41J 29/50 Z 9113-2C

Claims (3)

[Claims] 1. Ink particles are jetted from a nozzle and vibrated at a constant cycle to atomize the ink at a constant cycle, and a staircase-shaped charging signal is applied to a charging electrode to thereby form the ink particles. A nozzle head of an ink jet printer for forming characters by imparting electric charge to the particles and vertically deflecting the charged particles by flying in a deflection electric field to relatively move an object to be printed substantially at right angles to the vertical deflection of the ink particles. And the relative speed of the print object and the distance from the sensor detecting the print object to the start of printing, enter an arbitrary value from the input device such as the operation panel, and print at the specified position. An inkjet recording apparatus characterized by being capable of 2. The print surface width of an object to be printed is input by an input device or the like, the relative speed between the nozzle head and the object to be printed is automatically detected, and printing is performed at a predetermined position. An ink jet recording apparatus characterized by being capable of performing. 3. The relative speed between the nozzle head and the object to be printed, the distance from the detection of the object to be printed by the sensor to the start of printing, and the width of the printing surface of the object to be printed according to claim 1 or 2. An ink jet recording apparatus characterized by being able to store a plurality of pieces and select contents as necessary.