JPS63207269A - Driving method for paper feeding pulse motor - Google Patents

Abstract

PURPOSE:To prevent the phenomenon of white omission on a recorded image by dividing a heating body block group of thermal heads into two or more and generating a clock pulse, which drives a paper feeding pulse motor, in a first division and a last division to feed a paper. CONSTITUTION:When one line is divided into two or more, a first heating body block R1 is certainly used for the first division and the other heating body blocks are arbitrarily divided. The heating body block group is divided in this manner, and a first pulse 10 of the pulse motor driving clock are generat ed in first divisions A1, B1, and C1 of respective lines, and a second pulse 11 are generated in the last divisions A2, B3, and C7 of respective lines, and the paper is fed by d/2 twice per one line by two clock pulses. Thus, the phenom enon of white omission is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for driving a paper feed pulse motor of a recording device such as a facsimile using a thermal head.

(Prior Art) In a conventional device of this kind, when one line of data to be recorded on recording paper is divided and recorded.

jJW The paper feed pulse motor was driven to feed the paper during the first and second divisions. As an example of this conventional method, as shown in FIGS. 4 and 5, the thermal head heating element block group is composed of 7 blocks, and one line of the 7 blocks is divided into an arbitrary number of divisions for recording. shows.

Fig. 4 is a diagram showing the relationship between the pulse motor drive clock and the division method of the heat generating element block group according to the conventional method, and Fig. 5 shows the recording position by the heat generating element clock when recording using the method shown in Fig. 4. FIG.

In FIGS. 4 and 5, l is an example of one-division recording in which heating element blocks R1 to R7 are recorded together in one time of the first division AI on the first line of recording, and 2 is an example of 0 on the second line. The first division Bl of the heating element blocks R1 to R3, the second division B2 of the heating element blocks R4 to R6, and the heating element block R7
An example of 3-division recording in which 3rd division iu= is recorded in 3 times, 3 is the 3rd line and each of the 9 heating element blocks R1 to R7 is 1 block each, 1st division CI - 7th division An example of 7-part recording is shown in which C7 is divided into 7 times.
, 5 is a paper feed pulse motor drive clock, which generates two clock pulses per 1 line, 4 is the l-th pulse and is output in the first division, and 5 is the second pulse and is output in the second division. 6 shows a white part that occurs in the conventional dividing method.

Figure 3 shows how the recording position by the heating element block moves as the paper is fed according to the pulse motor drive clock.If the dimension of one heating element block is d in the paper feeding direction, each time a clock pulse occurs, a recording is made. The position moves by d/2.

Therefore, two clock pulses move the recording position by d, which corresponds to one heat generating block.

(Problem to be Solved by the Invention) In FIG. 4, when comparing the first line 1 and the second line 2, in the first line 1, the first division AI is is recorded and the paper is fed by d/2, 2
At pulse number 5.

Since 1 line has already been recorded at the 1st pulse 4, the paper is continuously fed by d/2.

In the second line 2, the first division B at the lth pulse 4
1 is recorded, the paper is fed by d/2, and the second pulse is 5 at the second pulse.
Division B2 is recorded, the paper is fed by d/2, and then the third
Division B3 is recorded. Here, since the paper has already been fed by icd/2 plus d/2, the recording position of the third division B3 is the same as the recording position of the third line 3. In the third line, the lth pulse 4 is the first division 8.
1 is recorded and the paper is fed by d/2.

At the second pulse 5, the first division 81 is recorded and the paper is fed by d/2, then the third division C3 is recorded, and in the same way, the paper is fed from the fourth division 04 to the seventh division C7. recorded without being recorded.

Here, in the second line 2, the second
The recording position of the division B2 and the recording position of the third division B3 are each moved by d/2 with respect to the second division B2. Therefore.

The position where the first division Bl is recorded is continuous below the first division AI of the l-th line, but the recording position of the second division B2 is advanced by 7 l clock pulses. Therefore, the first division AI of the l-th line l and the second division AI of the second line 2
A gap is created between it and the dividing line B2. Furthermore, below the first division A1 of the first line 1 and the third division B of the second line 2
There is also a gap between 3 and 3. This gap becomes Shiranuge 6.

Similarly, regarding the third line 3, the first division Bl of the second line 2, the second division C2 of the third line 3, the first division 81 of the second line 2, and the third division of the third line 3 Eye C3,
Also, white spots 6 are generated between the second division B2 of the second line 2 and the fourth division C4, fifth division C5, and sixth division C6 of the third line 3. As described above, the conventional method has the disadvantage that white spots occur on the recording surface.

(Means for Solving the Problems) In order to eliminate the above-mentioned drawbacks, the present invention divides the heating element block group of the thermal head into at least two or more parts, and Only one heating element block, the first heating element block, belongs to the first division, and the first division and the final division among the plurality of division groups.

A clock pulse is generated to drive the paper feed pulse motor to feed zero paper.

(Embodiment) FIG. 1 is a diagram showing the relationship between the pulse motor drive clock and the division method of the heating element block group in one embodiment of the present invention.
FIG. 2 is a diagram showing the position of recording by the heat generating block when recording is performed using the embodiment shown in FIG.

In Figures 1 and 2, 7 is the first line of recording;
8 is the 2nd line, 9 is the 3rd line, 10°11 is the 1st pulse and 2nd pulse of the pulse motor drive clock, R1, R2..., R7 is the heating element block, AI , A2 are the first and second divisions (final division) of the example of dividing the first line 7 into two, Bl, B2
．． B3 is the first division, second division, and third division (final division) of the example of 3 divisions of the second line 8, C1, C
2゜・・・・・・・・・C7 is the i1th division, the second division, etc. of the example of 7 divisions of 3rd line 9, respectively.
. . . is the seventh division (final division).

(Function) Looking at how each line is divided in Figures 1 and 2, the lth line 7 is an example of 2 divisions, with one of the 9 heating element blocks R1 being the first division AI. , the remaining heating element blocks R2 to R7 are defined as the final division A2.

The second line 8 is an example of three divisions, with one of the 0 heating element blocks R1 being the first division Bl, and 1 heating element blocks R2 to R5.
is the second division B2, and one heating element block R6, R7 is the final division B3. The third line 9 is an example of 7 divisions, with 9 heating element blocks R1 to R7 each consisting of 1 block.

It is divided into seven parts from the first division CI to the final division C7. In other words, when the number of divisions of one line is at least two, the first heating element block R1 must be the first heating element block R1.
The remaining heating element blocks are divided arbitrarily.

The heating element block group is divided in the above manner, and the pulse motor drive clock IPl and pulse 10 are applied to the first division AI, Bl, and CI of each line, and the second pulse 11 is applied to the final division of each line. These two clock pulses are generated at stitches A2, R3, and C7, and the paper is fed by d/2 twice per line.

In FIG. 2, when comparing the first line 7 and the second line 8, in the first line 7, the l-th pulse 10
At the second pulse 11, the first division A1 is recorded and the paper is fed by 672, and at the second pulse 11, the final division A2 is recorded and the paper is fed by 672.

In the second line 8, the m1 division Bl is recorded in the first pulse 10, and the recorded position here is a continuous position below the first division AI of the first line 7. Then, the paper is fed by 672, and the second division B2 is similarly recorded continuously below the second division A2 on the first line 7. 2
In pass 11, the final division B3 is recorded, but since the paper has not been fed before that, it is recorded following the second division B2.

Thereafter, the paper is fed by d/2. On the third line 9,
The first division CI is recorded at the l-th pulse 10, and similarly to the second line 8, it is continuously recorded under the first division Bl of the second line 8.

Next, 672 sheets of paper are fed to the first division A1.

It is continuously recorded under the second division B2 of the second line 8. The following boxes are 0 from the second division C3 to the final division C'7.
The sheets are recorded one heating element block at a time under the second division B2 and the final division B3 of the second line 8 without paper feeding, and after the final division C7 is recorded, the paper is fed 672 times. Therefore.

According to this method, the white-out phenomenon does not occur.

(Effects of the Invention) As explained above, according to the present invention, the continuity of recording is maintained between each line when recording on recording paper, so there is an advantage that white spots on the recording surface can be prevented. be.

[Brief explanation of the drawing]

FIG. 1 is a diagram illustrating the relationship between the pulse motor drive clock and the division method of the heating element block group in one embodiment according to the present invention, and FIG. 2 shows the heating element blocks recorded by the embodiment shown in FIG. 1. 3 is a diagram showing how the recording position moves as the paper is fed, and FIG. 4 is a diagram showing the relationship between the pulse motor drive clock and the dividing method of the heating element block group according to the conventional method. FIG. 5 is a diagram showing the positions of recording by the heating element block when recording is performed by the method shown in FIG. 4. 7...1th line, 8...2nd line, 9...・3
Line 10.11...Pulse motor drive clock. R1, R2..., R7...Heating element block, AI. Bl, CI...first division, A2. B2. C2...
Second division, B3. C3...Third division, C4°C5
, C6, C7...4th. Fifth. 6th. 7th division.

Claims (1)

[Claims] In a method of recording on recording paper by variably dividing a group of heat generating blocks of a recording paper recording device using a thermal head, a first heat generating block of the group of heat generating blocks is
As a division, the heating element block group is divided into a plurality of division groups of at least two or more, and a paper feed pulse motor is driven in the first division and a final division among the plurality of division groups. A method for driving a paper feed pulse motor, characterized in that: