JPS58155309A - Carrier position detecting system in serial dot printer device - Google Patents

Abstract

PURPOSE:To implement the effective printing function at the shortest distance in both directions, by preventing the erroneous recognition of the carrier position owing to the splitting of a zone signal caused by hunting in starting in the initial regions of a carrier driving pulse motor and the vibration of a mechanical structure. CONSTITUTION:A counter 4 counts dot pulses DOT.P and outputs carry CRY when the counted value reaches a predetermined value. The counter 4 is cleared by zone pulses ZON.P. A flip-flop 5 is reset by a starting signal CRBSY for the carrier driving pulse motor, and outputs a Q output, i.e. an enable signal for a flip-flop 6 in the next stage based on the carry signal from the counter 4. The flip-flop 5 is cleared by the zone pulses. The flip-flop 6 is operated by the zone pulses ZON.P, and outputs a Q signal, i.e. a ZON.F signal. Said ZON.F signal is sent to the control part of a printing device, and the confirmation of the carrier position and the control of the carrier movement are performed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a carrier position detection method in a serial dot printer, and particularly to a dot signal for detecting /SS mother magnetic timing and a method for detecting a dot signal and a character unit or character unit.
In a serial Φ dot printer device that moves the carrier and excites the hammer based on zone signals output in block units, the dot signals are counted and output after the count value reaches a predetermined good air constant value. The present invention relates to a carrier position detection method in a serial dot printer device in which the carrier position is detected based on a zone signal transmitted.

Generally, when a pulse motor, for example, is used as a drive source for a carrier in a serial dot printer, in the early stage of starting the carrier, vibration of the mechanical part of the pulse motor during hunting causes the carrier to Since the carrier moves while vibrating, that is, making a slight reciprocating motion, the carrier cannot move smoothly in a predetermined direction. Therefore, the zone signal and dot signal K are output in response to the movement of the carrier.

Cracks occur as will be described later with full reference to FIG.

Note that the above zone signals and dot signals are generated by, for example, a photo sensor that detects zone signal generation slits and dot signal generation slits provided in a slit disk that rotates in conjunction with a pulse motor that drives the carrier. be done. That is, reference numeral 1 in FIG. 1 is the above-mentioned slit disk, and the #slit disk 1 has zone slits 2 and cough zone slits for generating zone signals in character units or character block units. Between 20 and 20 dots and slits 3 corresponding to the number of dots constituting the character block are formed in the character block 3 (the slit disk l shown in FIG. Based on the sensor outputs (as shown in FIG. 1 (α)) corresponding to the zone slit 2 and dot slit 3, a pulse-like zone signal (hereinafter referred to as αY) as shown in FIG. Zone Pulse, or Z for short
ON-P) and a dot signal (not shown) (hereinafter referred to as a dot pulse, or DOT-P for short) are generated. Figure 1 (g) shows the sensor output when the rotation of the pulse motor that drives the carrier reaches a steady state. It has a correct waveform.

Therefore, the zone pulse (4) generated based on the above-mentioned sensor output (g) also has a pulse waveform having a period corresponding to the above-mentioned zone φ slit 2.However, as mentioned above, the above-mentioned zone pulse (4) starts the motor. In the initial region, as shown in FIG. 1(h), cracks occur in the Senna output. Now, assuming that the position of the photo sensor (not shown) before starting the pulse motor is the dotted line position shown in FIG.
The output of the sensor is affected by the notching of the pulse motor described above, and has a waveform as shown in FIG. 1 (j), for example. The effect of hunting is greatest immediately after startup, and gradually decreases. and.

The zone pulse generated based on the sensor output <h> is as shown in FIG. That is, the zone pulse corresponding to zone 2-i may generate a plurality of false zone pulses and dot pulses due to the above-mentioned cracking of the sensor output screen.
Since the position of the carrier is detected by the plating zone pulse, the carrier position will be erroneously detected by one fiber. Such a mistake in carrier position! Ninth, in conventional serial dot printers, the zone spacing is widened to prevent the pulse motor from crossing the zone in the initial startup region and during slewing. However, in the case of a printer equipped with a shortest distance printing function in one direction, the zone spacing becomes wider.

There was a drawback that the throughput of the carrier movement operation was not increased.The present invention aims to solve the above drawbacks,
The objective is to prevent misidentification of the carrier position due to cracks in the zone signal caused by hunting in the initial start-up region of the carrier drive pulse motor or vibration of the mechanical mechanism, and to realize a more effective shortest distance printing function in both directions. The purpose is Therefore, the carrier position detection method in the serial dot printer device of the present invention includes a means for generating a dot signal for detecting the normal excitation timing and a zone signal for detecting the carrier position which is output in character units or character block units. In a serial dot printer device that moves the carrier and excites the hammer based on the dot signal and the zone signal, the count values of the counter and cough counter that are initialized by the zone signal and count the dot signals are predetermined. The flip-flop uses a signal indicating that the air flow has reached a fixed value as an enable signal, and uses the zone signal as an input signal.

The present invention is characterized in that the zone position of the carrier is controlled by the output of the flip-flop. This will be explained below with reference to the drawings.

FIG. 2 is a block diagram for explaining one embodiment of the present invention, and FIG. 3 is a time chart for explaining the operation of the embodiment shown in FIG. , 5 and 6 represent flip-flops, respectively. In addition, the figure 3 (:) is the output waveform of the photo sensor mentioned at the beginning of the specification of the present application, and the figure 1 figure (b)
This corresponds to The diagram (1) shows the zone pulse (
ZON-p)? As mentioned above, the sensor output (1
), but since a crack appeared in the zone waveform of the above sensor output (1) that appeared immediately after startup, multiple false zones and zones were generated corresponding to the zone waveform.
A pulse is generated. Then, carrier driving pulse 0
Time 1 shown in FIG. 3 is when the hunting of the motor has ceased, that is, the mosquito pulse motor has returned to normal rotation. A normal zone pulse is generated corresponding to the zone waveform that appears thereafter. It was. The figure 3 (lit) shows the dot pulse (
DOT-P).

It is generated based on the sensor output (1). Portions and sides in FIG. 3 will be sequentially explained in the explanation of the operation of the embodiment illustrated in FIG. 2, which will be described later.

In FIG. 2, the counter number counts dot pulses (as shown in FIG.
(v)CRY) shown in the figure is output. The specified value is the startup (
The value determined by the number of dots (17' in the example shown in Figure 3) from the time to) shown in Figure 3 until no cracks occur in the force (time 1 shown in Figure 3). It is. In addition.

The counter 4 is cleared by a zone pulse ((1) ZON@P shown in FIG. 3). The flip-flop 5 is preset by the start signal (CRBSY, shown in Figure 2) of the carrier driving pulse motor, and the Q output (VDFFI/Q, shown in Figure 3) is generated by the carry signal of the counter 4. That is, it outputs an enable signal for the flip-flop 6 in the next stage, which is cleared by the zone pulse.Then, the flip-e-flop 6 outputs an enable signal for the flip-flop 6 at the next stage, which is cleared by the zone pulse.
N-p) and Q output (as shown in Figure 3 & IFF
z・Q), that is, outputs the ZON・F signal. The ZON-F
The signal is sent to a control section of the printing apparatus (not shown), where the carrier position is confirmed and the carrier movement is controlled.

Note that the flip-flop 6 is cleared by the ZON
-ACK signal answered by the circuit used by the F signal (
Figure 3: ELLZON-F ACK) K! It is carried out with

As explained above, according to the present invention, it is possible to prevent misrecognition of the carrier position due to cracking of the zone signal caused by hunting in the initial startup range of the carrier drive pulse motor, vibration of the mechanical mechanism, etc. The output interval of the zone pulses can be reduced for the purpose of
It is possible to provide a carrier position detection method in a serial dot printer device that makes it possible to realize a more effective bidirectional shortest distance printing function.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram regarding the generation of cracks in carrier position detection signals, which is the premise of the present invention, and FIG. 2 is an illustration of an implementation of the present invention.
FIG. 3 shows a time chart for explaining the operation of the embodiment shown in FIG. 2. In the figure, 4 represents a counter, and 5 and 6 represent flip-flops.

Claims (1)

[Claims] The dot signal for timing detection and the zone signal for detecting the carrier position are generated in character plotter units. In the serial dot printer device, a counter initialized by the zone signal and counting the dot signals, and an enable signal are provided that indicate that the count value of the counter is less than a predetermined value. A carrier position detection method in a serial type dot printer device, which is equipped with a flip-flop which receives the above-mentioned zone signal as an input signal, and controls the position of the carrier O zone based on the output of the #tripput.