JPS6337978A - Recorder - Google Patents

Abstract

PURPOSE:To obtain the recorder having the high accurate adjusting function of record timing for correction of the dislocation caused by bidirectional recording, by providing the first adjusting means by which a reference time can be set at each edge of a pulse and the second adjusting means by which a reference time can be set at a time point further delayed by a fixed time from the time point set thereby. CONSTITUTION:When a record result is slightly dislocated even by coarse adjusting with switches SW1, SW2, the fine adjustment of a recording position is carried out by using fine adjusting switches SW3-SW5. That is, when the pulse interval of CR pulse is taken as tw in the case of setting the fine adjusting switch at +1, a main MPU3 drives a recording head 6 1/8tw later from receiving the CR pulse. Therefore, the recording position moves leftward by (1/8) dot. In the same way, when the fine adjusting switches SW3-SW5 are set at +2-+7, a recording pulse can be delayed from the CR pulse as reference from 2/8tw to 7/8tw in 1/8tw unit. Then, the printing position an be moved leftward to the maximum (7/8) dot by (1/8) dot.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a recording device, and more particularly to a recording device that is capable of adjusting the recording position by being equipped with recording timing adjustment means. .

(Prior Art) In serial printers such as wire dot printers and thermal transfer printers, that is, recording apparatuses that perform recording on a recording medium by scanning a carriage on which a recording head is mounted in the horizontal direction with respect to the recording medium. The recording speed is improved by performing recording during both rightward and leftward scanning.

In many of these serial printers, the carriage is moved using a stepping motor, and recording is performed at the rise and fall of the drive pulse of the motor. However, when bidirectional recording is performed using the above-described apparatus, the recording positions do not exactly match when recording in the right direction and in recording in the left direction, resulting in a discrepancy in the recording results. For example, when vertical lines are recorded using bidirectional recording, the vertical lines do not form a straight line and become unsightly. Therefore, in order to match the recording positions during rightward recording and leftward recording and obtain high-quality recording results, the recording timing has been conventionally adjusted.

[Problem that the invention seeks to solve]

However, in this type of conventional device, as described above, recording is performed at the rise and fall of the driving pulse of the stepping motor, that is, recording is performed in units of one step of the carriage motor.
The reference point for recording timing is 1 of the carriage motor.
There is a problem in that the selection can only be made for each step, and fine-grained fine adjustments cannot be made.

The present invention has been made in order to solve the conventional problems as described above, and an object thereof is to provide a recording device having a highly accurate recording timing adjustment function for correcting deviations caused by bidirectional recording. The purpose is

(Means for Solving the Problems) Therefore, in the present invention, in a recording apparatus that controls the recording position on a recording medium using pulses, as a means for adjusting the reference time of the recording timing, the reference time is adjusted at each edge of the pulse. The first adjustment means is capable of setting the reference time, and the second adjustment means is capable of setting the reference time at a time further delayed by a certain period of time from the time set by the first adjustment means.

[For production]

According to the present invention, the recording timing during leftward recording can be adjusted over a wide range with high precision, and recording deviations in bidirectional printing can be finely corrected.
You can obtain high-quality records.

(Embodiment) FIG. 1 is a block diagram showing a schematic configuration of an embodiment of the present invention. The recording device 1 is connected to a host system 2 such as an external computer via an interface section 4.

The data line of the interface section 4 is connected to a main microprocessor unit for control (hereinafter referred to as main MPU).
3 and a head controller 5, and data transfer and conversion processing are controlled by the main MPU 3.

The head controller 5 converts logical recording data representing an image using bits input manually from the main MPU 3 into drive data corresponding to the physical arrangement and drive energization time, and outputs the drive data to the recording head 6.

The recording head 6 is mounted on a carriage, and this carriage is scanned in the horizontal direction with respect to the recording paper by a carriage motor 7. One paper feed is performed by a paper feed motor 8.

Reference numeral 9 denotes a slave microprocessor unit (hereinafter referred to as slave MPU), which controls the carriage motor 7 and paper feed motor 8 based on command signals sent from the main MPU 3. Stepping motors are used for the carriage motor 7 and paper feed motor 8, and the slave MPU 9 controls these motors in an oven loop. In addition, the slave MPU9 is the main MPt
13 outputs to the main MPU 3 information necessary to control the recording apparatus, for example, in this embodiment, a pulse signal (hereinafter referred to as CR pulse) that notifies the phase switching timing of the carriage motor.

Reference numeral 10 denotes a recording position correction switch for adjusting the recording position during leftward recording. Recording position correction switch l
O is composed of a 5-bit DIP switch, and its status is read out by the main MPU 3. Two bits out of the five bits of the recording position correction switch IO are used as coarse adjustment switches SW1 and SW2, and the remaining three bits are used as fine adjustment switches SW3 to SW5.

Table 1 shows the relationship between the states of coarse adjustment switches SWI and SW2 and their corresponding correction values, and Table 2 shows the relationship between the states of fine adjustment switches SW3 to SW5 and their corresponding correction values.

Table 1 Table 2 Here, the plus sign of the correction value indicates a movement of the recording position to the left, and the minus sign indicates a movement of the recording position to the right.

The correction value shown in Table 1 is 0. +1. -2. Numbers such as -1 are in units of one dot at the recording position, and correspond to one step of the carriage motor.

Further, the numbers such as correction values O to +7 shown in Table 2 are in units of (1/8) dots of the recording position, and correspond to (1/8) steps of the carriage motor.

The operation of this embodiment configured as described above is shown in FIGS. 2 to 4.
This will be explained using figures.

Figures 2 to 4 show the carriage motor drive pulses,
CR output from slave MPU9 to main MPU3
5 is a time chart showing the relationship between pulses and recording pulses output from the main MPU 3 to the recording head 6. FIG.

First, Figure 2 shows the state during rightward recording, where slave MPυ9 outputs excitation signals of each phase of A, B, A, and B to drive the carriage motor by 1-2 phase excitation. The carriage is moved to the right, and when each phase is switched, a CR pulse is output to notify the main MPU 3 that the phase has been switched. The recording pulse indicates the timing at which the recording head 6 is driven. As shown in the figure, upon receiving the CR pulse, the main MPU 3 immediately outputs a recording pulse to drive the recording head 6.

Next, we will discuss the left direction recording.

Here, in the initial state, coarse adjustment switches SW1 and SW2 are used.
and fine adjustment switches SW3 to SW5 are all OFF.
Therefore, the correction values shown in Tables 1 and 2 are both 0.

Figure 3 shows the state during recording in the left direction, and the carriage motor 7 is
rotates in the opposite direction to that shown in FIG. 2, and the carriage moves to the left.

In this case, since the correction value is 0, the recording pulse (0
) Recording is performed at the timing shown.

In this manner, recording is performed in the rightward and leftward directions, and if a deviation occurs in the recording results, the user adjusts the recording timing by using the recording position correction switch 1O to adjust the recording position.

First, the coarse adjustment of the recording position using the coarse adjustment switches SWI and SW2 will be described. Now coarse adjustment switch SW2
When the correction value is set to +1 with Delayed by one pulse. Therefore, the recording position during leftward recording is moved by one dot to the left. Also,
Adjust the coarse adjustment switches SWI and SW2 to set the correction value -
If set to 1 or -2, the recording timing will be in the state shown by recording pulse (-1) or recording pulse (-2) in FIG. 3, and the recording position will move one dot or two dots to the right.

If the recording results are slightly off even after making the above coarse adjustments, the user should use the fine adjustment switches SW3 to SW.
5 to make fine adjustments to the recording position.

FIG. 4 shows the recording timing when the fine adjustment switch is set to +1. Assuming that the pulse interval of CR pulses is t, the main MPU 3 performs l after receiving the CR pulse.
The recording head 6 is driven after /8tw. Therefore, the recording position moves to the left by (1/8) dots. Similarly, by setting the fine adjustment switches SW3 to SW5 to +2 to +7, 2/8tw to 7 in 1/8tw units.
/8 can be delayed from the reference CR pulse to the stomach, and the printing position can be moved to the left in units of (1/8) dots up to a maximum of (7/8) dots. Since the pulse interval tw of the CR pulse is determined in advance, the delay time from receiving the CR pulse to transmitting the recording pulse can be determined by the software of the main MPU 3 using a timer built into the main MPL+3, for example. You can also do it.

As explained above, according to this embodiment, if adjustment is performed by combining the coarse adjustment switches SWI, SW2 and the fine adjustment switches SW3 to SW5 in the recording position correction switch IO, the adjustment can be made in the left direction recording. Move the recording position to the left (15
/8) From the dot to 2 dots to the right (1/8)
Adjustments can be made dot by dot, making it possible to correct the recording position with high precision over a wide range.

Also, since the recording timing is controlled by the main MPU,
Does not require special hardware. Furthermore, since the recording timing is adjusted based on the drive timing of the carriage motor, there is little increase in the burden on the main MPt+ due to the provision of the adjustment function. Note that the adjustment of the recording timing may be controlled by the software of the main MPU as shown above, or it may be easily done by hardware by configuring a delay circuit by combining appropriate logic circuits, for example. .

Further, in this embodiment, a stepping motor is used as the carriage motor, and the slave MPU 9 outputs a pulse signal, so the pulse interval is accurate, but there is no problem even if there is some variation in the pulse interval. Therefore, it is easy to use an encoder or the like to control a carriage motor such as a DC motor in a closed loop, and to control the recording timing based on the pulse signal output from the encoder.

(Effects of the Invention) As explained above, according to the present invention, the recording timing during leftward recording can be adjusted with high precision over a wide range, and recording deviations in bidirectional printing can be finely corrected. , it is possible to obtain high-quality records.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a timing chart when recording in the right direction, FIG. 3 is a timing chart for explaining the rough adjustment function when recording in the left direction, and FIG. FIG. 4 is a timing chart for explaining the fine adjustment function. 1... Recording device, 2... Host system, 3... Main MPU. 4... Interface unit, 5... Head controller 6... Recording head, 7... Carriage motor, 8... Paper feed motor, 9... Slave MPU. lO...Switch for recording position correction. Kisa Pulse Figure 2 Figure 3

Claims (1)

[Claims] In a recording apparatus that controls a recording position on a recording medium using pulses, the recording timing includes a first adjustment means that can set the reference time for each edge of the pulse as a reference time adjustment means for recording timing, and a first adjustment means that can set the reference time for each edge of the pulse. 2. A recording apparatus comprising: second adjusting means capable of setting the reference time at a time further delayed by a certain period of time from the time set by the means.