JPS61222744A - Recorder - Google Patents

Abstract

PURPOSE:To reduce the cost of a recorder as well as enable reliable regulation to be made in a short time by method in which a sensor is provided, the printing position of each head unit is judged, the drive timing of the heads is automatically determined, and the content is stored in a nonvolatile element. CONSTITUTION:Data of all 1 for one line are written in image buffers 14-21 by MPU 13. The action of a stepping motor 1 is controlled and a printing paper 4 is run. The data of the image buffer 14 are sent to a head unit 5 on a position synchronized with the phase-switching timing of the motor 1,and data for one line are printed. The detection level of a sensor 3 is set up, the output of the sensor is detected, and the distance between the position of head units 5-12 and the sensor is measured. The data are stored in a nonvolatile memory 22, and timing of printing command for each head unit can be obtained. Therefore, the regulation of printing can be made easier.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a recording device capable of forming an image.

More specifically, the present invention relates to a dot matrix printer that uses a plurality of head units to form images of characters, for example, a color inkjet printer with a line head, or other printers. It is.

[Prior art]

Conventionally, in this type of device, since printing for one dot must be performed using multiple heads with different physical locations, the drive timing of each head has generally been corrected using electrical means. .

However, this correction value depends on the position, accuracy, and
It is difficult to determine it unambiguously due to differences in characteristics, etc. Therefore, a method is used in which the correction value can be adjusted using a switch or the like, and the adjustment is made while comparing it with the printed result.

However, when there are many head units or when it is necessary to widen the adjustment range, the adjustment time becomes longer and
The disadvantage is that the number of switches increases and the cost increases.

〔the purpose〕

In view of the above points, it is an object of the present invention to provide a recording device that facilitates adjustment and has a simple configuration.

In order to achieve this object, one aspect of the present invention includes a recording position detection means and a print timing automatic setting means, and is configured to store the print timing in a non-luminous storage means.

〔Example〕

Hereinafter, the present invention will be described in detail based on Examples.

In Figures 1 to 4, l is a stepping motor (hereinafter abbreviated as motor) that feeds the paper, 2 is a feed roller attached to the motor shaft of l, 3 is arranged at two locations,
Reflective sensors with different detection levels for each of the colors black, cyan, magenta, and yellow. 4 is the paper to be printed on. 5 to 12 are the upper and lower 2 sensors for each of the four colors black, cyan, magenta, and yellow. The head units (hereinafter, BU, BU, 5, BL,
(abbreviated as CU, CL, MU, ML, YU, YL), 13 controls the operation of the stepping motor 1, sets the detection level of the sensor 3, and detects the sensor output.

Microprocessor (hereinafter abbreviated as NPU) that controls the print timing of 5 to 12 head units, 1
Reference numerals 4 to 21 designate image buffers that send one line of image data to the head units 5 to 12 according to signals from the main unit 13, and 22 a non-luminous RAM that stores measured values.

In the above configuration, the 13th MPU first writes one line of all 1 data to the image buffers 14 to 21. Next, the 13th MPU rotates the step motor 1 at a constant speed and Run the printing paper.

The pulses shown in FIG. 4 (CB) indicate the phase switching timing of this l motor. Figure 4 (A) shows (B)
), 13 MPUs are 14
Data is transferred to the image buffer 5 to the head unit 5, and one line of data is printed.

The paper 4 continues to run, and the number of pulses in Figure 4 (B) is adjusted from point A to Figure 4 (C ) counts until the sensor output occurs.

Similarly, by performing similar measurements for 6 to 12 head units, the distance between each head position and the sensor can be measured.

By storing this data in the non-luminous memory 22, the timing of giving a print command to each head unit when actually printing can be determined according to the pulse resolution shown in FIG. 4(B).

In the case shown in FIG. 4, the value N is stored at 14.

FIG. 2 shows the result of printing one line of data at the same timing using the head arrangement shown in FIG. 1. In actual use, this must be printed on the - line.

Note that this sequence requires pressing a specific switch,
Alternatively, this may be done by instructing the 13 MPHs to start execution via a communication line.

〔effect〕

As explained above, according to the present invention, a sensor is provided to read the printing position of each head unit, automatically determine the head drive timing, and store the contents in the non-luminous element. Therefore, it is possible to perform reliable adjustment in a short time, and at the same time, it is possible to reduce costs.

[Brief explanation of drawings]

Fig. 1 is a schematic configuration diagram showing the head, paper, and sensor of a recording device to which the present invention is applied, and Fig. 2 shows the result of printing one line of all data at the same timing using the configuration shown in Fig. 1. 3 is a block diagram showing an embodiment of the present invention, and FIG. 4 is a block diagram showing an embodiment of the present invention.
A), (B), and (C) are waveform diagrams showing print timing, paper feed timing, and print data detection timing by a sensor, respectively. DESCRIPTION OF SYMBOLS 1...Stepping motor, 2...Feed roller, 3...Reflective sensor, 4...Print paper, 5-12...Head unit, 13...MPtl, 14-21... - Image buffer, 22... Non-luminous memory. Figure 4 Procedural amendment (method) June 7, 1985 Manabu Shiga, Commissioner of the Patent Office 1, Indication of the case Patent Application No. Sho GO-85123 2, Invention name recording device 3, Person making the amendment and the case Relationship Patent applicant (1oo) Canon Co., Ltd. 4, Agent 3rd floor, Seiko Building 6, 5-1-31 Akasaka, Minato-ku, Tokyo 107 Telephone: (03) 589-1201 (Representative) 5. Amendment order Date of spontaneous
−(′−“′6, subject of correction

Claims (1)

[Scope of Claims] 1) A recording device comprising a recording position detecting means and a print timing automatic setting means, and storing the print timing in a non-luminescent storage means. 2) The recording apparatus according to claim 1, wherein a print line detection sensor is provided as the recording position detection means, and image formation is performed using a multi-head.