JPS60145768A - Record scanning system - Google Patents

Abstract

PURPOSE:To prevent irregularity of carrying when dividing recording elements arranged in a line into some blocks and making recording while carrying recording paper by synchronizing record driving timing of each block and driving timing of a motor. CONSTITUTION:A motor driving circuit 3 responds to an indicate signal (a) of a recording start indicating circuit and supplies prescribed number of motor driving pulses (d) to a step motor 5 by fixed intervals. The step motor 5 is rotated by pulses (d), and carries the recording paper through a roller 6. On the other hand, a record driving circuit 2 outputs driving pulse (c) for each recording block to a head 4 responding to above-mentioned command signal (a). Out of these driving pulses, prescribed pulses are sent successively to a motor driving circuit 3 as a controlling signal (f), and thereby above-mentioned motor driving pulses (d) are synchronized with record driving pulses (c). Thus, irregularity of carrying between a line of adjoining records can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a recording scanning method in a facsimile machine or the like.

[Prior art]

In facsimile machines and the like, there is a method in which recording elements arranged in a - column are divided into several blocks and the recording timing of each block is controlled by the distribution of black pixels or the like.

A conventional recording scanning method in such a case will be described below.

FIG. 1 shows a first configuration example of a conventional recording scanning method,
2 is a recording start instruction circuit in one row, 2 is a recording drive circuit, 3 is a motor drive circuit, 4 is a recording head (recording element), 5 is a step motor, 6 is a paper conveyance roller, 7 is a recording paper, 8 is a recording timing This is an adjustment circuit. FIG. 2 is a timing chart for explaining the operation of FIG.
is the recording drive pulse for each recording block (recording unit), 39
is the recording time of one row, 40 is the step motor settling time, 6
0 indicates the recording paper width, and 61 indicates the paper feeding direction (recording order).

Now, when a line of recording start instruction signals a is supplied from the recording start instruction circuit 1 to the motor drive circuit 3, the motor drive circuit 3 applies a predetermined number of motor drive pulses d to the step motor 5 at regular intervals. As a result, the step motor 5 rotates, and the recording paper 7 is transported in the direction of the arrow 61 through the single-sheet transport roller 6 with a displacement as shown in FIG. The conveyance of the recording paper 7 stops after the step motor settling time 40 shown in FIG. 2 has elapsed. On the other hand, the recording start instruction signal a in the - column is also applied to the recording timing circuit 8, and after the step motor settling time 40 has elapsed, the recording start signal a is applied from the recording timing adjustment circuit 8 to the recording drive circuit 2. The recording drive circuit 2 controls the recording timing of each recording block based on the number of black pixels, and when a recording start signal is given, the recording drive circuit 2 generates a drive pulse C of each recording block at the timing illustrated in 31 to 38 in FIG. is supplied to the recording head 4.

- After outputting a column of recording drive pulses, the recording drive circuit 2 sends a recording end signal e for one column to the recording start instruction circuit 1, and permits transmission of a recording start instruction signal a for the next column. Recording on the recording paper 7 is performed at pulses 51 to 38 corresponding to recording drive pulses 31 to 38.
Recording of each recording block is performed as shown in 58, and recording 59 of the - column is achieved.

In the conventional method shown in Fig. 1, the - row is recorded after the step motor settling time of 40 seconds has elapsed, so uneven conveyance does not occur, but on the other hand, recording cannot be performed during the step motor settling time, and a faster recording speed can be expected. It has no drawbacks.

FIG. 3 shows a second configuration example of the conventional recording scanning method,
The recording timing adjustment circuit 8 of FIG. 1 is removed, and the recording drive circuit 2 and motor drive circuit 3 are operated simultaneously by the recording start instruction signal a of the - column. FIG. 4 is a timing chart for explaining the operation of FIG. 3.

When a row of recording start instruction signals a is supplied from the recording start instruction circuit 1 to the motor drive circuit 3, the motor drive circuit 3 applies a predetermined number of motor drive pulses d to the step motor 5 at regular intervals. Due to this.

The recording paper 7 is conveyed via the paper conveyance roller 6 with a displacement as shown in FIG. At the same time, - column recording start instruction signal a
is also supplied to the recording drive circuit 2, and the recording drive circuit 2
Drive pulses C for each recording block are supplied to the recording head 4 at timings illustrated in 31 to 38 in the figure. - When the drive pulse C for the column is output, the recording drive circuit 2 sends the recording end signal e for one column to the recording start instruction circuit l, and permits the sending of the recording start instruction signal a for the next column. The recording on the recording paper 7 is performed in parallel with the conveyance of the recording paper 7 in response to the recording drive pulses 31 to 38, and a line of recording 59 as shown in 51 to 58 in FIG. 4 is performed.

According to the conventional method shown in Fig. 3, since the step motor settles and records within the cabinet while the recording paper is displaced, it is possible to increase the recording speed, but the disadvantage is that it causes uneven conveyance between adjacent rows of recordings. have. D in Figure 4 is 31 to 3, respectively.
8 shows the degree of conveyance unevenness for each block when two rows are recorded at the timing shown in FIG. That is, 31~
Although the timing of the drive pulse for each recording block shown in 38 differs between scanning lines depending on the distribution of black pixels, etc., it can be seen that the unevenness of conveyance increases accordingly.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a high-speed recording scanning method for facsimile machines and the like with less uneven conveyance.

[Summary of the invention]

The gist of the present invention is that when recording elements arranged in rows are divided into several blocks and recording is performed while the recording paper is conveyed, there is a gap between the recording drive timing of each recording block and the pulse motor drive timing. By giving a synchronous relationship,
This realizes recording with less uneven conveyance.

[Embodiments of the invention]

FIG. 5 shows an embodiment of the present invention, in which ``■'' is a row of recording start instruction circuits, 2 is a recording drive circuit, 3 is a motor drive circuit,
4 is a recording head, 5 is a step motor, 6 is a paper conveyance roller, and 7 is recording paper. FIG. 6 is a detailed diagram of the parts of the recording drive circuit 2 and the motor drive circuit 3 that are particularly related to the present invention, in which 201 is a recording drive pulse generation section, 301 to 304 are monostable multi, and 305 is an OR gate.

FIG. 7 is a timing chart for explaining the operation of the embodiment of the present invention. Below, Figures 5 and 6 are based on Figure 7.
The operation of the diagram will be explained.

A row of recording start instruction signals a is sent from the recording start instruction circuit 1 to the recording drive circuit 2 and the motor drive circuit 3. This allows the motor drive circuit 3 to output the motor drive pulse d, but the actual output is performed in synchronization with the control signal f. On the other hand, in the recording drive pulse generation section 201 in the recording drive circuit 2.

- By being given the column recording start instruction signal a, 3
Drive pulses C for each of recording blocks 1 to 38 are sequentially output. As illustrated in FIG. 7, the output timing of the drive pulses 31 to 38 for each recording block and the duration of the pulses vary depending on the number of black pixels and the like.

Among these recording drive pulses 31 to 38, 31°33.3
5.37 drive pulses are sequentially applied to the motor drive circuit 3 as a control signal f. In the motor drive circuit 3, after aligning the recording drive pulses 31, 33, 35° 37 into a predetermined pulse using monostable multis 301, 302°, 303, and 304, the OR gate 305 performs a logical sum to generate a motor drive pulse d. do. This motor drive pulse d drives the step motor 5, rotates the paper conveyance roller 6, and conveys the recording paper 7. In parallel with this conveyance of the recording paper 7, a recording drive pulse C is applied to the recording head 4, and a line of driving pulses C is applied to the recording head 4 as shown in 51 to 58 in FIG. A recording 59 is made. - When the recording drive pulse C of the column is output, the recording drive circuit 2 sends the recording end signal e of one column to the recording start instruction circuit 1 and permits the sending of the recording start instruction signal a of the primary column.

According to this embodiment, as shown by ■ in FIG. 7, the recording drive pulses 3.1, 33, 35.37 and the motor drive pulse d
Because of this synchronization, the conveyance unevenness D between adjacent rows of recording is greatly reduced compared to FIG. 4.

In the embodiment, the number of recording blocks in the - column is 8, and 8
Although three recording drive pulses are output and every other one is synchronized with the motor drive pulse, this is just an example, and any numerical value is possible as long as the synchronization relationship is maintained.

Further, although FIGS. 5 and 6 show the case where the remote drive pulse is created from the recording drive pulse, the recording drive pulse may be created from the motor drive pulse.

Furthermore, synchronization between the recording drive timing of each recording block and the step drive timing of the pulse motor can be achieved by adjusting the timing of the motor drive pulse and the recording drive pulse using a delay element, or by adjusting the timing of the motor drive pulse and the recording drive pulse using a programmable logic element such as a microprocessor. This can also be achieved by generating drive pulses and recording drive pulses.

[Effects of the Invention] As explained above, according to the present invention, printing can be performed in the shortest printing scanning time determined by the printing drive pulse or motor driving pulse per column of printing, that is, at high speed, and also by keeping the printing paper stationary. There is an advantage that printing scanning can be realized by the conveyance unevenness of an adjacent line of printing that is similar to that in printing.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a first configuration example of a conventional recording scanning method.
2 is a timing diagram explaining the operation of FIG. 1, FIG. 3 is a diagram showing a second configuration example of the conventional recording scanning method, and FIG. 4 is a timing diagram explaining the operation of FIG. 5 is a diagram showing an embodiment of the present invention, FIG. 6 is a detailed view of a part of FIG. 5, and FIG. 7 is a timing chart explaining the operation of FIGS. 5 and 6. DESCRIPTION OF SYMBOLS 1... - column recording start instruction circuit, 2... Recording drive circuit, 3... Motor drive circuit, 4... Recording head, 5
...Step motor, 6...Paper transport roller, 7...
- Recording paper, a... - column recording start instruction signal, C... recording drive pulse, d... motor drive pulse, e... -
Column recording end signal, f...control signal. Figure 4 n O・6 Figure 2

Claims (1)

[Claims] (1) The motor is fed in steps to convey the recording paper in several steps for each row, and in parallel with the conveyance of the recording paper, the recording elements arranged in the - column are divided into several recording blocks. 1. A recording scanning method in which recording is performed sequentially, characterized in that the recording drive timing of a recording block and the step drive timing of a motor are synchronized to control both drive timings.