JPH0818454B2 - Recording device - Google Patents

Description

The present invention relates to a recording device such as a heat-sensitive recording device that records on a recording medium such as paper according to input data.

[Conventional technology]

FIG. 2 is a block diagram of a conventional thermal recording apparatus.
In the figure, 1 is a line type thermal head, 2 is a platen, and 3 is a motor for rotationally driving the platen 2. Four
Is a recording paper as a recording medium, and is transported by the platen 2 in a direction perpendicular to the recording line of the thermal head 1.

A control circuit 5 performs conversion, processing, and the like for matching with the recording gradation characteristics of input data. A head drive circuit 6 drives the thermal head 1. A motor drive circuit 7 drives the motor 3.

The input data is input to the control circuit 5, converted and processed so as to match the recording gradation characteristics. The control circuit 5 controls the thermal head 1 via the head drive circuit 6 to perform recording on the recording paper 4 according to the input data.

When the recording for one line is completed, the control circuit 5 controls the motor drive circuit 7 to rotate the motor 3, and thus the platen 2, by a certain rotation angle. As a result, the recording paper 4 is transported in a direction perpendicular to the recording line by a fixed length.

The same operation is repeated thereafter, and recording is sequentially performed line by line.

[Problems to be Solved by the Invention]

For example, when the input data is the result of frequency analysis of a predetermined signal, this data continuously occurs every moment. When the analysis parameter of the frequency analysis (for example, the analysis width or the like) is changed, the cycle of the arithmetic processing for the frequency analysis, that is, the cycle of the data input to the control circuit 5 changes. The conventional device always transfers recording paper at a constant pitch regardless of the cycle of input data. As a result, when input data whose cycle changes in this way is recorded,
The time axis scale on the recording paper changes locally,
There is a disadvantage that it becomes inconvenient when grasping changes in data over time.

Therefore, the present invention is to make the scale of the time axis on the recording paper constant.

[Means for solving the problem]

The recording apparatus of the present invention has a head for performing recording corresponding to input data on a recording medium for each line, a platen for moving the recording medium in a time axis direction perpendicular to the recording line, and a motor for rotationally driving the platen. A motor control circuit that detects the cycle of the input data and controls the motor so that the rotation speed of the platen becomes slower as the cycle of the input data becomes shorter and the time axis scale on the recording medium becomes constant. It is characterized by that.

[Action]

The motor control circuit detects the cycle of input data. The rotation angle of the motor, and thus the transfer amount of the recording medium, is changed according to this cycle. That is, the shorter the cycle, the smaller the transfer amount, and the longer the cycle, the larger the transfer amount.

 Therefore, the scale of the time axis on the recording medium becomes constant.

〔Example〕

FIG. 1 is a block diagram of a recording apparatus of the present invention.
The parts corresponding to those in the figure are denoted by the same reference numerals. In FIG. 1, 11 is a motor rotation angle control circuit, which detects the cycle of input data. The motor rotation angle control circuit 11 is inserted between the control circuit 5 and the motor drive circuit 7. The other structure of the recording apparatus of the present invention is the same as that shown in FIG.

Then, the operation will be described. Input data is input to the control circuit 5 as in the case described above. The control circuit 5 outputs data for one line to the head drive circuit 6 after performing a predetermined process. The head drive circuit 6 drives the thermal head 1 in accordance with this data. As a result, one line of recording is performed on the recording paper 4.

The control circuit 5 outputs a predetermined signal to the motor rotation angle control circuit 11 when the input of data for one line is started (or completed). The motor rotation angle control circuit 11 starts counting clocks from this time, detects the time (cycle) until a signal is input again, and outputs a signal corresponding to the detection cycle to the motor drive circuit 7. . Motor drive circuit 7
Drives the motor 3 for a time corresponding to the detection cycle. As a result, the rotation angle of the platen 2 (the transfer amount of the recording paper 4) is changed according to the detection cycle. That is, the longer the cycle, the larger the rotation angle (transfer amount).

In this way, the recording corresponding to the data of one line is performed on the recording paper which is sequentially transferred by the amount corresponding to the detection period.

The present invention can be applied to a recording apparatus using a method other than the heat-sensitive method.

〔The invention's effect〕

As described above, according to the present invention, the shorter the cycle of input data (that is, the larger the amount of input data) is, the slower the rotation speed of the platen is, so that the scale of the time axis on the recording medium becomes constant. Since the motor is controlled as described above, it is possible to obtain an effect that it is possible to easily grasp the time of the data.

[Brief description of drawings]

 FIG. 1 is a block diagram of a thermal recording apparatus of the present invention, and FIG. 2 is a block diagram of a conventional thermal recording apparatus. 1 ... Thermal head 2 ... Platen 3 ... Motor 4 ... Recording paper 5 ... Control circuit 6 ... Head drive circuit 7 ... Motor drive circuit 11 ... Motor rotation angle control circuit

Claims (1)

[Claims] 1. A recording apparatus comprising: a head for performing recording corresponding to input data on a recording medium for each line; a platen for moving the recording medium in a time axis direction perpendicular to the recording line; and a motor for rotationally driving the platen. In (1), a motor control circuit that detects the cycle of the input data and slows down the platen rotation speed as the cycle of the input data becomes shorter to control the motor so that the scale of the time axis on the recording medium becomes constant is provided. A recording device characterized by the above.