JPS58102788A - Control system of space - Google Patents

Abstract

PURPOSE:To detect the position of a printing head rapidly, and to increase the speed of printing treatment by setting the zone holes of a slit disk mounted to a driving section, which moves a printing section containing the printing head in parallel with a platen member, at unequal intervals. CONSTITUTION:When the printing head 21 is moved in the right direction from a point (a), catches the first zone hole 6 (Z2) and catches the next zone hole (Z3), the position of the zone hole 6 is determined according to the distance of the zone hole 6, the number of counting of dot holes 7. Difference up to a point (b) is calculated while using the position as the starting point, the head is moved through counting by the zone hole 6 and the dot holes 7 only by the difference, and printing is started from the point (b). When the printing head 21 is positioned at a point (c) and starts printing to the left side from a point (d), the printing head 21 is moved to the right side, catches the first zone hole 6 (Z5) and catches the next zone hole 6 (Z6), and the position of the zone hole 6 is determined. A distance up to the point (d) toward the left side from the point is counted by the zone hole 6 and the dot holes 7 and the head is moved, and the head starts printing from the point (d).

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to the space control of a print head of a serial printer, and particularly to an improvement in a control method that can quickly detect the position of the print head.

(2) Technical Background In recent years, serial printers have been developed and put into practical use as office machines such as terminals for computer banking systems and word processors. On the other hand, as its use as a combiator terminal is expanding, there is a need to increase the speed of printing.

(3) Prior Art and Problems Hereinafter, a conventional method will be explained using a wire tod printer as an example with reference to FIGS. 1 to 3. FIG. 1 is a plan view illustrating the outline of a wire tod printer to which the present invention is applied, FIG. 2 is a perspective view showing the positioning mechanism of the print head shown in FIG. 1, and FIG. FIG.

In the figure, 1 is a slit disk, 2 is a zone hole, 3 is a dot hole, 4 is a photosensor, 9 is a side frame, 10 is a platen, 11 is a printing paper, and 12a.

12b is a sprocket, 13 is a carrier, 15 is a guide shaft, 16 is a feed screw, 17 is a belt, 19 is a motor, 20 is an ink ribbon cassette, 20a is an ink ribbon, and 21 is a print head.

As shown in FIG. 1, the wire tod printer has a platen 10 rotatably supported. The printing paper 11 is wound around the platen IOK, and the printing paper 11 is sent in the direction of arrow A in the figure by sprockets 12a, 12b, etc. On the other hand, in the front of the platen 1o, that is, in the lower part of the figure,
The carrier 13 is slidably fitted into the guide shaft 7) 15 provided parallel to the platen 10, and the carrier 13
is a feed screw 16 installed parallel to the platen 10 in the same body.
They are competing. The feed screw 16 is connected to a motor 19 via a belt 17 or the like, so that the feed screw 16 can move the carrier 13 in the directions of arrows C and D in the figure by the forward and reverse rotation of the motor 19. An ink ribbon cassette 20 is mounted on the carrier 13, and an endless ink ribbon 20a is built into the cassette 20 with a part thereof exposed to the platen 10 side. Also,
A dumpling head 21 is installed in the carrier 13 surrounded by an ink ribbon cassette 20, and the print head 21
A plurality of printing magnets are provided in order to form printing by dots.

Normally, 7 to 24 printing magnets are provided. Because of this configuration, when the printing head 21 is activated, the printing magnets are attached to the printing paper 11 on the platen 10 shown in FIG. 1 via the ink ribbon 20. The printing wires collide to perform printing, and the printing head 21 prints on the printing paper 11 while moving with the carrier 13 in the direction of the arrow. - When the printing for the character is completed, the printing paper 11 is transported in the direction of arrow A by a predetermined tension amount for line feed.

The print head 21 continues printing while moving in the direction of arrow C.

To explain the method of controlling the printing position of the print head 21, as shown in FIG. 2, the slit disk 1 is attached to one end of the feed screw 16. Zone holes 2 are provided at evenly spaced intervals near the outer periphery, and dot holes 3 are provided at small intervals between them. This zone hole 2 and dot hole 3
't? Photosensors 4 are arranged sandwiching the slit disk 1 from both sides. Therefore, when the feed screw 16 rotates, the slit disk 1 rotates, and the zone holes 2 and dot holes 3 passing through the photosensor 4 are counted.

With this configuration, the print positioning of the print head 21 starts from the home position of the print head 21 ≧ and starts the print head 21 by driving the feed screw 16 . Color of zone hole 2 and dot hole 3 of slit disk 1 by 4! − It can be controlled by different loading of components.

However, with this method, there are cases where printing starts after one source is turned on, when the print head 21 is moved by hand, or when printing starts in the middle of the line due to printing the output of an office computer, word processor, etc. Both methods require the printing position to be determined after returning the print head 21 to the home position, which has the disadvantage of slowing down the effective printing processing speed.

(4) Object of the Invention The present invention is intended to solve the above-mentioned drawbacks, and its object is to provide a space control method that improves printing speed.

(5) Structure of the Invention The present invention comprises a platen member, a printing unit including a print head facing the platen member with a gap therebetween, and a drive unit that moves the printing unit in parallel to the platen member. In a printer that prints on a medium set at a distance between a printing section and the platen member by controlling the printing position using a slit disk provided in the drive section, zone holes of the slit disk are arranged at irregular intervals. This space control method is characterized in that the position of the print head is determined based on the interval between the zone holes. In this way, the objective can be achieved.

(6) Embodiment of the Invention An embodiment of the invention will be described below with reference to FIGS. 4 to 6. FIG. 4 is a front view showing an embodiment of the present invention, FIGS. 5(a) and (b) are explanatory diagrams of the print head positioning control method according to FIG. 4, and FIG. It is a flowchart. In the figure, 5 is a slit disk, 6 is a zone hole, and 7 is a dot hole.

Further, the same parts as in FIGS. 1 and 2 are indicated by the same symbols.

As shown in FIG. 4, slits are provided in the slit disk 5, with zone holes 6 arranged at irregular intervals and dot holes 7 arranged at equal intervals.
ing. That is, the number of dot holes within each interval of zone holes 6 is different. The attachment to the feed 9 screw 16 and the relative position with respect to the hot spring 4 are the same as those shown in FIG.

With such a configuration, this slit denomination 5
When changing the position of the print head 21 using
To explain an example in which the character head 21 is at point a in FIG. The situation read by the photosensor 4 due to the rotation of the print head 21 is shown on a scale with respect to the movement of the print head 21. or,
In the figure, the sea/hole 6 is 2°, z,...Zn,,,
It is shown in (This is also the case in FIG. 5(b).) Now, the print head 21 moves from point a to the right in the figure, and as shown in FIG.
) and the next zone hole (2,), the position of the zone hole 6 can be determined by the distance of the other zone hole 6, that is, the count number of the dot holes.

Therefore, from this point as a starting point, the difference between dots is calculated, and the dot is moved by the difference between the zone hole 6 and the dot hole 7, and printing can be started from dot. In addition, in Section 5-(b), an example will be explained in which the print head 21 starts printing to the left from point cK, and then from point d.
From the positional relationship between point C and point d in the figure, the print head 21
The shortest distance is to move to the left as shown by the dotted arrow in the figure and locate at point d using the method explained in Figure 5 (&). Since we know the position of point A, we do not know whether point d is on the left or right side of point C. Therefore, as shown by the solid line arrow in the figure, first move to the right, catch the first sea/hole 6 (Zfi), catch the next zone hole 6 (z6), and move to the zone hole 6.
Since the position of is known, move leftward to point d by counting the distance using zone hole 6 and dot hole 7, and start printing from point d.

In this way, no matter where the print head 21 is located, the print position from the middle of the 11th line will be maintained until the home position is reached.
It is possible to position and start printing without returning 1.

(7) As described in detail, according to the present invention, when the printer is turned on and starts printing, when the dumpling head is manually moved, or when printing computer output, etc. When starting printing from the middle of a line, there is no need to return the print head to the home position and then move it to the print start position as in the conventional method, which has the effect of improving the effective printing processing speed. In addition, since the absolute position of the print head can be detected, even if the actual print position and print head position deviate due to external force or other reasons, when printing with a space that has two or more zone holes, the horizontal There is no misalignment of printing in the direction, and it has the effect of making it look better.

[Brief explanation of the drawing]

FIG. 1 is a plan view illustrating a wire tod printer to which the present invention is applied, FIG. 2 is a perspective view showing the print head positioning mechanism in FIG. 1, and FIG. 3 is a front view showing the slit disk in FIG. 2. , FIG. 4 is a front view showing an embodiment of the present invention,
5(a) and 5(b) are explanatory diagrams of the print head positioning control method according to FIG. 4, and FIG. 6 is a flowchart of FIG. 5(a). In the figure, 1 and 5 are slit disks, 2° and 6 are zone holes, 3 and 7 are dot holes, 4 is a photosensor, 16 is a feed screw, and 21 is a print head. Figure 17: yPz drawing = Figure 5/Figure f74-

Claims (1)

[Claims] It consists of a platen member, a printing unit including a print head facing the platen member with a gap therebetween, and a drive unit that moves the printing unit parallel to the platen member, and the distance between the printing unit and the platen member is In a printer that performs printing by controlling the print position using a slit disk provided in the drive unit, the zone holes of the slit disk are set at irregular intervals, and the zone holes of the zone holes are A space control method characterized by determining the position of the print head based on the spacing.