JPS62267177A - Printer - Google Patents

Abstract

PURPOSE:To enable to deal with even an alteration of a printing pitch on the way of printing, by a method wherein when an alteration of a printing pitch has been carried out, operational processing is performed on the basis of the data of the number of printing figures, and correction movement of a carriage is performed, and also the alteration of data set to a memory is performed. CONSTITUTION:This printer performs the control of a printing position through the counting of the number of printing figures and, when an alteration of a printing pitch has been carried out on the way of printing, operational processing is performed on the basis of the number of printing figures and a carriage 5 is moved to the printing position corresponding to the altered printing pitch and the data of the tab stored in a memory 9 is also altered. Therefore, more natural printing can be obtained and the shift from the set position of the tab does not occur. Further, by performing control on the basis of the number of printing figures, the memory capacity used for control can be constituted smaller.

Description

[Detailed description of the invention] (b) Industrial application field The present invention relates to a printing device that can change printing pitch.

(B) Conventional technology Recently, electronic typewriters have become very popular, and electronic typewriters can be configured to select between elite printing, which prints 12 characters per inch, and bi-power printing, which prints 10 characters, by switching a switch. In addition, a tab or margin function is provided, the tab position or margin position is stored in the memory, and the movement of the printing member during printing is controlled based on the tab position or margin position data (specifically, Kaisho 5
5-44891).

By the way, when printing is performed with either elite or pie force set and tabs and margins set accordingly, printing will be performed at the selected pitch, but the printing will be interrupted during printing. When the pitch is changed, there is a problem in that a deviation occurs from the tab position or margin position set in the memory.

Furthermore, in electronic typewriters, the printing position is usually controlled by the number of pulses applied to a pulse motor that moves the carriage on which the printing member is placed from the home position. In order to print with a print width of 9 inches, a maximum of 540 pulses are required, and the counter that manages this is made up of two 8-bit configuration memories.
Similarly, the memory in which tabs or margin data are set requires 2 bytes each, requiring a large memory capacity.

Therefore, a method of managing by the number of printing digits is also used. In this case, when the printing width is 9 inches, the maximum number of digits is 108 digits at elite pitch, which can be managed with 1 byte, so the memory capacity can be halved, but as mentioned above, the printing pitch must be changed during printing. However, there was a problem that it was not possible to respond to changes in printing pitch because of digit management.

e→ Problems to be Solved by the Invention The present invention has been made to solve the above-mentioned problems, and is capable of managing the printing position using digit number data and also being able to cope with changes in printing pitch during printing. The present invention provides a printing device configured according to the present invention.

2) Means for solving the problem In the present invention, when the printing pitch is changed during printing,
It is composed of a control means that performs arithmetic processing based on the current printing digit number data, performs corrective movement of the carriage, and changes data set in the memory.

(e) Function Since the present invention is configured as described above, when the printing pitch is changed during printing, the tab position or margin position becomes approximately the same position as the position set before the change, and Since the print position is managed using digit data, the memory capacity is small.

(f) Example Embodiments of the present invention will be described below with reference to the drawings.

(1) is a keyboard consisting of numeric keys, alphabet keys, special symbol keys, printing pitch selection keys, etc.
It is configured to select a printed character by key operation and output a signal corresponding to the selected character key. (2) takes in the print command signal from the keyboard (1), and prints the print mechanism (4) according to the program in the program memory (3).
), which is composed of a microprocessor. The printing mechanism (4) includes a carriage (5) on which a daisy wheel and a motor for rotating the wheel are mounted.
), a pulse motor (6), etc. that controls the movement of the carriage (5) along the print line, and the drive is controlled by the motor drive signal (Sl) and daisy wheel drive signal (S2) from the control circuit (2). be done. On the other hand, a signal (S3) indicating the initial position of the daisy wheel and carriage (51) is supplied from the printing mechanism (4) to the control circuit (2). The control circuit (2) that receives the pulse output supplies the pulse motor (6) with pulses corresponding to the moving direction of the carriage, and controls the movement of the carriage (5). (8) is a digit counter that counts the position of the carriage (5) from the initial position, and is configured to be reset to "0" when the carriage (5) is returned to the initial position. 5
) is controlled by the control circuit (21) so that it is incremented by "+1" when it is moved one digit to the right, and "-1" when it is moved one digit to the left, and the counter value is controlled by the control circuit (21). ) is read as appropriate. (9) is a memory in which tab or margin data is set based on key operations for tab or margin setting on the keyboard (1), and data is written or read by the control circuit (2). is controlled.In addition,
Although not shown in the figure, the control circuit (2) is provided with various flag memories and variable memories used to determine conditions when the control circuit (21) performs processing, and a plurality of working registers that temporarily store processing data. ing.

Figure 2 shows the correspondence between elite printing and pica printing,
The arrow indicates the correction movement direction of the carriage when the printing pitch is changed.

Next, the operation of the present invention having such a configuration will be explained based on the flowchart shown in FIG.

First, select the elite print key (IA) on the current keyboard (1).
) is operated and elite print pitch is selected,
In Figure 2, when printing is completed up to the 10th digit, the carriage (5
) is placed in the 11th digit of point P, the value of the digit counter (8) is "10", and the 20th digit and 50th digit are stored in the memory (9).
It is assumed that data with a tab set in the digit is stored. In addition, the flag (
Fl) is set, and is configured to be reset by operating the bi-power printing button (1B).

At this time, if the input key (1B) on the keyboard (1) is selected, the control circuit (2) that captures the key signal is selected.
) determines that the pi-force pitch has been selected in step (Sl), proceeds to step (S), sets the value of flag (F2) to variable A, resets flag (F2), and returns "0".
”. The flag (F2) is set during elite printing and becomes 1J, and is reset to "0" during bias printing.
is set to Since elite printing has been performed up to now, the flag (F2) is "1" and the variable A is set to "1". Therefore, the process proceeds to step (S6) based on the determination in step (S5), and the value rKJ of the digit counter (8) is inputted into the variable engineering.
That is, "10" is set, and the variable J is set to rOJ. Subsequently, the process advances to step (S7) and the flag (F2) is determined. Since the flag (F2) is reset to "0" in step (S4), the process advances to step (S8) and processes "I-6→IJrJ+1→J", and I=4.
Let J≠1. Next, in step (S9), it is determined whether I is greater than "0".

Since I=4 and I≧0, the process returns to step (S8) and repeats the same process as described above. As a result, ■=-2, J=
2, so proceed to step (S10) and select “■+
2→l'' and set I=0. Subsequently, in step (S11), a comparison judgment of I<0 is performed, and step (31
Proceed to step 5), process rK-J-bo, and set variable k to
8”. Next, in step 31, it is determined whether or not the digit correction has been completed, but it has not yet been completed, so
Proceeding to step (S15), the digit counter (8) indicates "
After setting ``8'', a determination of ≧6 is made in step (816). Now it is "10" so step (317)
Proceed to step 1 and perform the calculation ``rK16'' to obtain the remainder M. Next, in step (S18), the remainder M is determined, and now "4" is determined.
'', the process proceeds to step (821) and processes [-MJ, and in step (322) the carriage (5) is moved leftward by two pulses. As a result, as shown in FIG. 2, the corrected movement has been made to the position (Q) of the 9th digit of bias printing. Following the correction movement of the cow ridge (5), the control circuit (2) determines whether tab or margin data is set in the memory (9) in step (S2). Since the tab data has been set, the control circuit (2) returns to step (S6), reads the value K of the tab data from the memory (9), and sets it to variable 1. Therefore, the variable ■ becomes "20J," and from then on, By the same processing as described above in steps (S7) to (313), =17 is obtained in step (313), and in step (S
If the result is negative, the program proceeds to step (32M) and changes the tab data "20" in the memory (9) to "17". Then, in step S2, it is further determined whether or not there is data in the memory (9), and if there is, the same process as described above is performed, and if there is not, the state waits for the next key human input, but there is still no data in the tab data. 5
0", so the process is performed and in step (313) =
By calculating 42, the tab data in memory (9) “
50" is corrected to "42".

As a result of the above operations, the cow ridge (5) is moved from the position of point P corresponding to elite printing to the position of point Q, which is closest to the bias printing and moved to the left by two pulses, as shown in Figure 4. Therefore, when the next print key is pressed manually from the keyboard (1), the corresponding character is printed at the position of point Q as the 11th digit. As a result, up to the 10th digit, the elite printing interval, that is, the motor pulse, was printed at an interval of 5 pulses, but the 10th and 11th digits are printed at an interval of 3 pulses.

Thereafter, when the print keys are pressed manually on the keyboard (1), bi-force printing, that is, printing is performed using motor pulses at intervals of 6 pulses. At this time, since the bias printing is fixed, the control circuit (2) operates in steps (Sl) (S4) (S5
), the state advances to the key scan state, and the arithmetic processing control described above is not performed. When the tab key is operated during printing, the control circuit (2) reads the first tab data "17" from the memory (9), although it is not shown in FIG. Based on the calculation result, a predetermined number of pulses are supplied to the motor to move the carriage (51) to the set tab position.

Figure 5 shows various examples of changing the printing pitch, (a
) is the case described above, and (b) is the case where elite printing is changed to bias printing when the value of the digit counter (8) is "6", and the control circuit (2) performs the same process as above. By doing this, the remainder M becomes "0", so step (S18
) to step (S2), so the carriage (5)
No movement will take place. That is, as shown in FIG. 2, it can be seen that the carriage position is the same for elite printing and bias printing. (C) similarly shows the case where the process proceeds from step (318) to step (S19), and the carriage (5) is corrected and moved to the right. Also (d) (e) (
f) is an example of a case where the printing is changed to elite printing in the middle of bias printing, and at this time, the control circuit (2) performs step (
Steps (S2) (S3) (S6) (S7) from Sl)
The process proceeds to step (S25), where the same arithmetic processing as described above is performed, and Kittredge (5
) is controlled in the direction and amount of correction movement. In this way, as shown in FIG. 2, the carriage (5) is moved for correction in the direction indicated by the arrow in accordance with the printing position.

Although the embodiment is explained for printing up to about 10 digits, the same correction can be made for the entire printing width.

Further, although the embodiments are described with respect to electronic typewriters, the invention can be similarly applied to printers and the like.

(G) Effects of the Invention As described above, the printing device of the present invention manages the printing position by counting the number of printing digits, and when the printing pitch is changed during printing, the printing position is managed based on the number of printing digits. By performing arithmetic processing and moving the carriage to the print position corresponding to the changed print pitch, the system also changes data such as tabs stored in memory, resulting in more natural printing and improved settings. This eliminates the possibility of discrepancies between the tab position and the current tab position. Furthermore, by managing the number of printed digits, it is possible to reduce the memory capacity used for control.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of the printing device of the present invention, FIG. 2 is a diagram showing the correspondence of printing positions depending on the printing mode,
Figure 3 is a flowchart showing the operating state of Figure 1;
This figure is a diagram showing a printing state based on FIG. 3, and FIG. 5 is a diagram showing a processing result based on FIG. 3. (1)... Cow-board, (2)... Control circuit, (4
)... Printing mechanism (5)... Carriage, (8)...
・Digit counter, (9)...memory.

Claims (1)

[Claims] (1) In a printing device that prints while moving a carriage carrying a printing member along a printing line, there is a digit counter that counts the number of printing digits and indicates the printing position, and a means for selecting the printing pitch. When the printing pitch is changed by the printing pitch selection means during printing, predetermined calculation processing is performed based on the value of the digit counter, and the calculation result is 1. A printing device comprising a control means for controlling correction movement of a carriage and changing data such as a tab in a memory based on the correct movement of a carriage.