JPS59152777A - Control system of stepping motor in facsimile device - Google Patents

Abstract

PURPOSE:To decrease the shift of recorded image between the recording start point of time and end point at each recording by carrying recording paper by the 2nd stepping pulse after end of recording in a recording scanning at each two scanning lines' share. CONSTITUTION:A transmission section 1 reads an original 3 at each other scanning line and transmits it to a receiving section 4. The receiving section 4 is constituted to store a picture signal transmitted from a head control circuit 8 by two lines simultaneously. That is, the receiving section 4 impresses the 1st stepping pulse to a motor 12 at the start point of time of recording at each recording and impresses the 2nd stepping pulse thereto at a point of time earlier by the time difference until the recording paper 10 is started for carrying. Thus, the carrying of the recording paper 10 by the 2nd stepping pulse is performed after the end of recording at each time and the amount of change in the recording paper on the way of recording is suppressed to a slight value only by the 1st stepping pulse.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to a control system for a stepping motor in a facsimile machine.

(Naka) Prior art In a conventional facsimile machine, the image signal read every other scanning line is read by the transmitting unit, and the receiving unit applies two stepping pulses to the stepping motor to move the recording paper by two scanning lines. During this time, two scanning lines are printed by a printing head having a printing area for two scanning lines. Specifically, as shown in FIG. 1(a), the interval between the synchronization signals (EOL) of one scanning line on the transmitting side is set to a minimum transmission time of 10 seconds or more, and as shown in FIG. 1(b), The recording time for each two scanning lines on the receiving side is 9 mm seconds, and the chipping pulse (8Pt) (8Pt) to the motor is set as shown in (C).
Fz) are applied at the start of recording and at the middle of the recording period, respectively, and as shown in (d) K, the recording paper starts moving 277177L seconds after applying each stepping pulse and stops after 87yL seconds. However, since the displacement of the recording paper due to the second stepping pulse (8P2) occurs during recording, the amount of displacement of the recording paper during each recording is equal to 2 step pulses (1/7.7 Texture x 2 → 1/6
．． 8511M), and therefore, as shown in FIG.
2 step pulses (1/ro, 85111
1) There is a drawback that it may shift.

(c) Purpose of the Invention The present invention is intended to reduce the deviation of recorded images between the recording start time and the recording end time during each recording of two-line simultaneous recording.

B) Structure of the Invention In this invention, the image signal read every other scanning line by the transmitting unit is applied to the stepping motor by two stepping pulses in the receiving unit to move the recording paper by two scanning lines. In the control method of the stepping motor in a facsimile machine that records two scanning lines at a time with a recording head having a recording width of two scanning lines, the first A stepping pulse is applied to the motor at the start of recording, and a second stepping pulse is applied to the motor at the end of recording by the time difference between when this stepping pulse is applied and when the recording paper starts to be transported. By applying this, the recording paper is moved by the second stepping pulse during the non-recording period after recording is completed, and the amount of displacement of the recording paper during recording is suppressed to a small amount due to only the first stepping pulse. be.

←) Embodiment FIG. 6 shows an embodiment of the present invention, in which (1) is a transmitting section, which is equipped with a reading device (2) and scans a document (3) every other scanning line as shown by diagonal lines. Read, read image (S
1 , ) (S 2 )... each with a minimum transmission time of 20
Send by electronic chikus/line.

(4) is the receiving section, and (5) is the receiving side modem (MODEM).
), (6) is a central processing unit that controls the facsimile machine, and (7) is a decoding unit that restores the image information and synchronization signal (EOL) and sends the synchronization signal (EOL) to the central processing unit (6). circuit, (8) is the head control circuit, (9) is the recording paper α0
) The recording head is a thermal tape installed in the width direction. The recording element of the recording head (9+) has dimensions (1/7.7 x 2 → 1/2, 85M) that can simultaneously record two lines in the sub-scanning direction.The head control circuit (8)
It is configured to record a round image signal sent to the camera at s/lin,e on two lines simultaneously within 19x*s. In addition, the configuration is such that the line is divided into eight parts and recorded each time.

(11) is a stepping motor drive circuit for transporting the recording paper 00), and the first stepping pulse (
8P1) and a second stepping pulse (8P2) are input from the central processing unit (6). (12) is a stepping motor that feeds the recording paper through a transmission mechanism (not shown).
It is designed to send 0.

In the receiving section (1), as shown in FIG. 4(a), the interval between synchronization signals (EOL) for one scanning line on the transmitting side is set to be equal to or longer than the minimum transmission time (10 na seconds), and as shown in FIG. 4(b). As,
The recording time for each two scanning lines on the receiving side is 99 seconds,
As shown in (e), two stepping pulses (8P1) (SF3) are applied during each recording, and as shown in (d), each stepping pulse (SPl) (SF3) is applied before recording. It is set so that the paper (10i) starts moving after 2m printing and stops after 8 seconds of copying.

In addition, the receiving section (4) transmits the first stepping pulse (8P1) at the recording start point (TS) during each recording.
) is applied to the motor (121) to apply the second stepping pulse (8P2), and from the end of recording (TE), this stepping pulse (8Pz) is applied to the recording paper (10
) is applied to the motor [Co., Ltd.] at a time just before the time difference (2 seconds and 9 seconds) before the start of transfer. Therefore, the recording paper (1
The movement of 0) is performed after the recording ends each time, and therefore,
The amount of displacement of the recording paper α0) during recording is shown in FIG.
10), a slight one (1) due to only the first stepping pulse (SPI) is shown.
/7.7 ho).

(F) Effects of the Invention According to the present invention, in each scan i of two scan lines, the movement of the recording paper by the second stepping pulse is performed during the non-recording period after the end of recording. The rise and fall of the recording paper can be suppressed to a small amount due to only the first stepping pulse.

[Brief explanation of drawings]

FIG. 1 is a diagram for explaining the operation of the conventional example, FIG. 2 is a diagram for explaining the recording mode in the conventional example, FIG. 6 is a schematic block diagram of an embodiment according to the present invention, and FIG. The figure is a diagram for explaining the operation of the same embodiment, and FIG. 5 is a diagram for explaining the recording mode in the same embodiment.

Claims (1)

[Claims] 1) The image signal read every other scanning fin by the transmitting unit is transferred to the receiving unit by two scanning lines while applying two stepping pulses to the stepping motor to move the recording paper by two scanning lines. In a control method for a stepping motor in a facsimile machine that records two scanning lines at a time with a recording head having a recording width of A second stepping pulse is applied to the motor at a point before the end of recording by a time difference from when this stepping pulse is applied to when the recording paper can start to be transported. A control method for a stepping motor in a facsimile machine.