JP3088279B2 - Dot line printer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dot line printer, and more particularly, to a dot line printer which prevents coil burnout of a hammer bank of a dot line printer and maximizes a printing processing speed.

[0002]

2. Description of the Related Art A conventional dot line printer which prevents a coil from being burned out due to a temperature rise of the coil by performing printing with a high printing duty,
As shown in FIG. 3 of JP-A-59-059464, as shown in FIG. 3, the printing dot accumulation number D is monitored during batch printing in which printing processing is performed by one printing operation.

When a fixed dot accumulation number Db0 is detected at every fixed batch printing time tb0, batch printing is set to two.
The number of print dots per unit time is reduced by shifting to distributed printing in which print processing is divided into four times or four times, that is, by checking the dot duty, the coil temperature T is lowered, and the coil heat-resistant temperature Tc Measures were taken to prevent burnout.

A circuit for counting and weighting the pause time of printing and a calculation circuit for adding and subtracting the output of the weighting circuit according to the number of dots (dot duty) in a certain period of time are provided. The dot accumulation number D detected within the printing time tb0 is varied.

[0005]

In this conventional duty check method, since the batch printing time tb0 for counting and detecting the dot accumulation number is kept constant, the coil temperature at the dot accumulation number counting start time is reduced. If the temperature is low, the printing mode shifts from batch printing to distributed printing before the coil heat-resistant temperature Tc is reached, that is, while leaving the margin temperatures T21, T23, T26 and T28 shown in FIG. Has not been fully demonstrated.

When weighting is performed in accordance with the print pause time and the detected dot accumulation number Db0 within the batch print time tb0 is increased, the rise of the coil temperature rise curve shown in FIG. Although the margin temperature T21 has the effect of decreasing, the dot duty corresponding to the print information data cannot be averaged as long as the batch printing time tb0 during the detection is constant.

That is, when a print line having a high dot duty and a print line having an extremely low dot duty or a non-print (paper feed) line coexist, the coil temperature rise actually becomes low even if batch printing is continued. Nevertheless, since the dot number monitoring time tb0 is constant, if the setting is short, detection is performed only on the printing line with the high dot duty, and the process shifts to distributed printing, and the printing processing speed is reduced. There was a disadvantage.

Further, as described above, the print information data is generally a mixture of print duty levels.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a dot line printer capable of preventing burning of a coil during printing with a high duty and maximizing the printing processing speed capability.

[0010]

[0011]

[0012]

A dot line printer according to the present invention converts the highest duty printing to the maximum printing processing speed of the dot line printer as cooling performance evaluation data actually measured by the dot line printer in advance. Coil temperature of the hammerbank at the time of printing, the coil temperature rise curve data correlating the coil temperature with the time from the environmental temperature where the dot line printer is placed to the coil heat resistance temperature, and printing was paused. Sometimes, the coil temperature is provided in a memory with coil temperature decrease curve data that is a correlation between the time required for the coil temperature to return from the coil heat-resistant temperature to the environmental temperature and the coil temperature. When the data is transmitted, printing is started by batch printing, which performs the printing process by one operation. At the same time, the dot counter and timer recognize how many dots are to be printed within a certain period of time, and when the print information is transmitted, the print control circuit The pause time is recognized by the timer, and based on this, the coil temperature is also recognized based on the temperature drop curve data, and based on the temperature rise curve data, the coil temperature is reduced when batch printing is performed. The time required to reach the coil heat-resistant temperature, and the cumulative number of dots that can be printed during that time, the detected dot number determination circuit determines the dot number monitoring time according to the dot number monitoring time. The print control circuit 5 checks the contents of the timer and the contents, and when the coil temperature T reaches the coil heat-resistant temperature, the print control circuit determines from the batch printing. It is shifted to the print, if not reach the coil temperature limit, characterized in that the printing control circuit is configured to carry out is sequencing batch printing.

[0013]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a configuration diagram of an embodiment of the present invention.

In advance, as the cooling performance evaluation data actually measured by the dot line printer, printing with the highest duty (for example, solid black) is performed at the maximum printing processing speed (for example, batch printing, etc.) of the dot line printer. Temperature T of the hammerbank
Coil temperature rise curve data 7 which correlates the coil temperature T with the time t from the environmental temperature T0 where the dot line printer is placed to the coil heat resistant temperature Tc;
When printing is stopped, the memory is provided with coil temperature falling curve data 6 which is a correlation between the coil temperature T and the time t required for the coil temperature T to return from the coil heat-resistant temperature Tc to the ambient temperature T0.

Here, when the data of the print information 1 is transmitted from the upper device to the dot line printer, the dot line printer starts printing by batch printing in which the printing process is performed by one operation. At the same time, the dot number counter 2 and the timer 4 recognize how many dots are to be printed within a certain time.

Further, at the time when the print information 1 is transmitted, the print control circuit 5 recognizes the idle time 3 up to that time by the timer 4, and based on this, the coil temperature T is determined by the temperature drop curve data 6. It also recognizes how many times it is now.
Then, based on the temperature rise curve data 7, the coil temperature T is changed to the coil heat-resistant temperature T when batch printing is performed.
The dot number monitoring time and the number-of-detected-dots determination circuit 8 determine the time t required to reach c and the cumulative number D of dots that can be printed during that time based on the maximum print processing speed of the dot line printer. Then, the print control circuit 5 checks this content against the content of the dot number counter 2 based on the print information 1 and the content of the timer 4, and when the coil temperature T reaches the coil heat-resistant temperature Tc, the print control circuit 5 Shift from printing to distributed printing.

The printing control circuit 5 is configured to perform batch printing continuously when the coil heat-resistant temperature Tc is not reached.

Next, the operation of the dot line printer shown in FIG. 1 will be described with reference to an example.

FIG. 2A is a graph showing an example of the correlation between the time t and the accumulated number of print dots D obtained by adding and accumulating the number of dots printed based on the print information in the dot line printer of FIG. is there. Therefore, when the inclination of the graph is steep, the batch printing is performed at a high printing speed, when the inclination is gentle, distributed printing is performed, and when the inclination is zero, the printing is paused.

FIG. 2B is a graph showing a change in the coil temperature T corresponding to FIG. 2A.

Referring to FIG. 2A, the coil temperature T is changed to the environmental temperature T0 based on the actually measured temperature drop curve data 6 according to the pause time ts1 until the batch printing is started based on the print information. The print control circuit 5 recognizes that there is, and from the temperature rise curve data 7 until the coil heat-resistant temperature Tc is reached, batch printing is performed from t10 to t11 (during ta0).
It is determined that up to Da0 dot can be printed.

Thereafter, at t11, the printing is shifted from batch printing to distributed printing, and the printing speed is reduced to reduce the amount of heat generated per time, the coil temperature T is reduced, and the coil heat-resistant temperature Tc is reduced.
Do not exceed.

Similarly, the print control circuit 5 recognizes that the pause time is zero at the end of the distributed printing at t12, and determines that the next batch printing can be performed from t12 to t14 (during ta2). I do. Further, the print control circuit 5 determines the time ta5 during which batch printing can be performed again from the length of the pause time ts2 from t14 to t15, and performs batch printing from t15 to t16.

As described above, as shown in FIG. 2B, the dot line printer shown in FIG.
The printing process is performed while maximizing the use of the print data, and finally, the total number of print dots Da is printed in the pause time ts2 between the print times tp1 and tp2 as shown in FIG. I do.

[0026]

As described above, according to the present invention, the time until printing control is performed in accordance with the rise in temperature of the coil in accordance with the pause time of printing can be varied based on actually measured temperature rise and fall data. As a result, the coil heat resistance temperature can be used as effectively as possible, and the duty of the print contents can be averaged, so that the dot line printer has the maximum print processing speed. It has the effect of being able to.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 (a) is a graph showing the correlation between time and the cumulative number of printed dots in the dot line printer of FIG. 1, and FIG. 2 (b) is the correlation between time and coil temperature corresponding to the diagram (a). FIG.

FIG. 3 (a) is a graph showing the correlation between time and the cumulative number of printed dots in a conventional example, and FIG. 3 (b) is a graph showing the correlation between time and coil temperature corresponding to the diagram (a). It is.

[Explanation of symbols]

 1 Print Information 2 Dot Number Counter 3 Uninterrupted Time 4 Timer 5 Print Control Circuit 6 Temperature Decrease Curve Data 7 Temperature Increase Curve Data 8 Dot Number Monitoring Time and Detected Dot Number Determination Circuit

Claims (1)

(57) [Claims] 1. A dot line printer in advance.
The highest data as cooling performance evaluation data
Printing is the largest dot line printer has
Copies of the hammerbank when printing at the print processing speed
Il temperature is the ambient temperature where the dot line printer is placed
From the time it takes to reach the coil heat resistant temperature and the coil temperature
Coil temperature rise curve data correlated with temperature
When the character is at rest, the coil temperature is
Time from returning to the ambient temperature from heat temperature and the coil
The coil temperature drop curve data, which is the correlation with temperature, is
When the print information data is transmitted from the host device,
Open printing by batch printing, in which processing is performed in one operation.
At the same time as the dot counter and timer
Recognize how many dots are printed in a certain time
When the print information is transmitted, the print control circuit
Recognition of pause time from the end of previous printing by the timer
Then, based on this, coil
The temperature rise car is also aware of the current temperature
Coil temperature when batch printing is performed based on the
Is the time required to reach the coil heat-resistant temperature,
The cumulative number of dots that can be printed on the
The number of detected dots determination circuit determines the
Contents of the dot counter and the timer
Is compared with the print control circuit, and the coil temperature T is
If the temperature reaches the heat resistance, the print control circuit
Shift from batch printing to distributed printing,
If it does not reach, make batch printing continuous.
A dot line printer comprising the print control circuit .