JP2594574Y2 - Recording device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus for performing recording in accordance with an input signal on recording paper conveyed by a platen roller, and more particularly to a method for correcting a position of a carriage on which recording means is mounted. .

[0002]

2. Description of the Related Art FIG. FIG. 3 shows a conventional apparatus in this type of recording apparatus, and shows a main part of a recording mechanism of the waveform recording apparatus. In the figure, 1 is a CPU, 2 is a drive motor, 3 is a carriage, 4 is a sensor, 5 is a platen roller, and 6 is a recording paper. The CPU 1 controls each section of the apparatus or executes various calculations based on an input signal. The drive motor 2 is configured as a pulse motor that generates a rotational force in response to a drive pulse P from the CPU 1, and is configured to transmit the rotational force to the carriage 3 via a wire 21 and a pulley 22. I have. The carriage 3 has a printing mechanism such as a dot impact head, and the printing mechanism can be moved in a recording width direction along the sliding shaft 31 to a position facing the platen roller 5 by a sliding shaft 31. It is supported by. The sensor 4 is disposed at a reference position on one end of the carriage 3 and generates a predetermined output when the carriage 3 is positioned at the reference position on one end. The platen roller 5 is a cylindrical member having a non-slip member such as rubber disposed on a peripheral surface thereof. The platen roller 5 is rotationally driven by a platen drive motor (not shown) to transfer the recording paper 6 wound on the peripheral surface. .
On the surface of the recording paper 6, a mark 61 indicating the magnitude of the waveform to be recorded is written. The operator determines the value of the input waveform (signal) based on the mark 61.

In such a recording apparatus, especially a waveform recording apparatus, it is necessary to accurately control the recording position by the carriage 3 (printing mechanism). For this reason, in this apparatus, the reference position of one end of the carriage 3 is grasped by the sensor 4, and the position of the carriage is captured by counting the number of pulses given to the drive motor using this position as a reference. .

[0004]

However, when the position of the carriage 3 is captured by the number of pulses applied to the drive motor 2, a predetermined number of pulses P are applied to the carriage to move the carriage from one end to the other end. And the moving distance ML when the pulse P is similarly applied to move from the other end to the one end. This is because a transmission loss of torque is generated in the wire 21 and the pulley 22 in the system for transmitting the torque from the pulse motor 2, in the illustrated conventional device. Therefore, the conventional method has a problem that it is difficult to accurately capture the position of the carriage 3. The present invention has been made to address this problem, and an object of the present invention is to provide a recording apparatus that can accurately capture the position of the carriage 3.

[0005]

For this purpose, the recording apparatus of the present invention is provided with a platen roller for transporting recording paper and recording means for performing recording on the recording paper in accordance with a signal, and is opposed to the platen roller. A carriage that moves along the recording width direction, a carriage moving unit that moves the carriage in accordance with the applied command amount, a first sensor mechanism that detects that the carriage is located at a reference position on one end side, and A second sensor mechanism for detecting that the carriage is located at the other end reference position, and a command amount applied to the carriage moving means for moving the carriage from the one end reference position to the other end reference position. The first command amount detecting means to be detected is applied to the carriage moving means for moving the carriage from the reference position at the other end to the reference position at the one end. A second command amount detecting means for detecting the decree amount, output and the second from the first reference variable detection means
And a correction coefficient calculating means for calculating a correction coefficient relating to the position of the carriage from the output from the command amount detecting means.

[0006]

The distance between the first sensor mechanism and the second sensor mechanism is constant. The correction coefficient calculating means is configured to calculate a correction coefficient corresponding to a difference between a movement command value when moving the carriage from one end to the other end and a movement command value when moving the carriage from the other end to the one end. Is calculated. The position of the carriage is controlled based on the correction coefficient.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG.
Is a block diagram showing a device according to an embodiment of the present invention, and the same parts as those described above are denoted by the same reference numerals. The difference between this embodiment and the conventional apparatus is that the sensor for detecting the position of the carriage 3 is constituted by a sensor for detecting the left reference position (indicated by reference numeral 4L) and a sensor for detecting the right reference position (indicated by reference numeral 4R). It is in the point which did. Therefore, the position of the carriage 3 is detected by the left sensor 4L at the left reference position, and is detected by the right sensor 4R at the right reference position.

Next, an operation of calculating a correction coefficient for the carriage 3 in this embodiment will be described with reference to FIG. First, the carriage 3 is positioned at the end of one side. The outermost portion is a position outside the reference position. For convenience of explanation, it is assumed here that the carriage 3 is positioned at the leftmost end. [FIG. 2 (a)]

Next, the CPU 1 sends a drive pulse P to the drive motor 2. The drive pulse P moves the carriage from the left to the right, and is referred to as a positive drive pulse in this specification. A pulse for moving the carriage 3 from the right side to the left side is referred to as a negative side drive pulse. When the positive drive pulse P is applied, the drive motor 2 rotates the pulley 22 and transmits the rotational force to the wire 21. As a result, the carriage 3 moves from the leftmost end to the right. When the carriage 3 passes through the left reference position, the left sensor 4L outputs a detection signal. The CPU 1 detects this detection signal and stores the number of pulses P1 sent to the drive motor 2 until the detection. [FIG. 2 (b)]

On the other hand, the sending of the positive drive pulse P to the drive motor 2 is continued, whereby the carriage 3 further moves to reach the right reference position. At this time, a detection signal of the carriage 3 is output to the CPU 1 from the right sensor 4R. CPU 1
Detects this detection signal and stores the number of pulses P2 transmitted to the drive motor 2 until the detection. At the same time, the CPU 1 stops sending the positive drive pulse P to the drive motor 2. Therefore, the carriage 3 stops at the right reference position. [FIG. 2 (c)]

Next, the CPU 1 controls the drive motor 2
, A negative drive pulse is applied. Thus, the carriage 3 starts moving leftward from the right reference position. When the carriage 3 reaches the left reference position, the CPU 1 determines the number of application of the negative drive pulse P based on the detection signal from the left sensor 4L.
3 is stored, and the application of the pulse to the drive motor 2 is stopped. [FIG. 2 (d)]

Next, the CPU 1 calculates a correction amount. Specifically, from the difference between the pulse number P1 when passing the left sensor 4L when the carriage 3 moves on the positive side and the pulse number P2 when passing the right sensor 4R, the number of positive side driving pulses required for the positive side movement is calculated. Then, the correction coefficient is calculated by subtracting the number of positive drive pulses from the number of pulses P3 during the negative movement. This correction coefficient is determined by the number of pulses required for the carriage 3 to move through the one-end reference position in the moving state to the other-end reference position, and the number of pulses required when the carriage 3 is stationary at the one-end reference position. , The difference from the number of pulses required to move to the reference position on the other end side.

Therefore, the correction coefficient is calculated by
By performing control in accordance with the correction coefficient in consideration of the amount of movement at the time of movement, accurate position control of the carriage 3 can be executed. That is, the carriage 3
When the driving of the motor is switched from the positive side to the negative side or from the negative side to the positive side, a pulse corresponding to the correction coefficient is applied to the driving motor 2.
And control is performed to absorb the loss due to the transmission system. Thus, accurate positioning of the carriage 3 can be realized. Further, the position when the carriage 3 moves from one end to the other end and the position when the carriage 3 moves from the other end to the one end can be captured. Accuracy is obtained.

[0014]

As described above, according to the recording apparatus of the present invention, the carriage moving along the recording width direction, the carriage moving means for moving the carriage in accordance with the applied command amount, and the carriage having one end. A sensor mechanism for detecting that the carriage is located at the side reference position or the other end reference position, and a command amount for moving the carriage from the one end reference position to the other end reference position and the other end reference position. Since it is composed of command amount detecting means for detecting a command amount for moving to the one end side reference position and correction coefficient calculating means for calculating a correction coefficient from an output from the first command amount detecting means, the position of the carriage Can be controlled accurately. In addition, there is an advantage that the positional accuracy during bidirectional recording can be improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating a configuration of an embodiment apparatus.

FIG. 2 is an explanatory diagram illustrating an operation of the embodiment device.

FIG. 3 is a configuration diagram showing a conventional device.

[Explanation of symbols]

 1 CPU 2 Drive motor 3 Carriage 4L Left sensor 4R Right sensor 5 Platen roller 6 Recording paper

Claims (1)

(57) [Scope of request for utility model registration] 1. A platen roller for transferring a recording sheet, a carriage mounted with recording means for performing recording on the recording sheet in accordance with a signal, and moving along a recording width direction facing the platen roller. A carriage moving means for moving the carriage in accordance with the command amount, a first sensor mechanism for detecting that the carriage is located at the one end side reference position, and a second sensor mechanism for detecting that the carriage is located at the other end side reference position. And a first mechanism for detecting a command amount applied to the carriage moving means for moving the carriage from the one end side reference position to the other end side reference position.
Command amount detecting means, and second command amount detecting means for detecting a command amount applied to the carriage moving means for moving the carriage from the other end reference position to the one end reference position; A recording apparatus comprising: a correction coefficient calculating unit that calculates a correction coefficient related to the position of the carriage from an output from a first command amount detecting unit and an output from the second command amount detecting unit.