JPH0655893A - Positioning method in xy protter - Google Patents

Abstract

(57) [Abstract] [Purpose] Accurately align front and back figures without individual differences [Constitution] The front and back alignment method of this XY plotter device is such that a plurality of alignment patterns are drawn outside the drawing range. The coordinates of at least two sets of alignment patterns obtained by moving the sensor in the X direction and the Y direction and crossing these alignment patterns by using the paper are read, and the coordinates of the read alignment pattern are read. Based on the above, the positions of the patterns on the front and back sides are aligned.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an XY plotter device, and more particularly to a method for aligning an XY plotter device of the type that prints on the front and back.

[0002]

2. Description of the Related Art Conventionally, when drawing a basic structure of a building on the front side and drawing piping on the back side, such as an architectural drawing, when the drawing must be done on the front and back sides, it is out of the drawing area on the front side. When a plurality of marks (for example, 3 points) are attached to the position at the time of plotting or before plotting, and when plotting on the back side, specify the mark position by referring to the front side mark drawn from the back side with a loupe, etc. A general method is to perform resetting at the mark position to align the figures, or to draw from a certain distance from the edge of the paper as a reference.

[0003]

However, in the former method, since the positions of the figures to be drawn on the front and back sides are manually adjusted, a visual measurement error may occur, resulting in individual differences in the position adjustment, and temperature and humidity. Due to changes in the environment, the size of the paper may change, and the drawings on the front and back may not match even if the alignment is performed. Also, in the latter method, if the size of the paper changes due to environmental changes such as temperature and humidity, the drawings on the front and back do not match even if the alignment is performed.

[0004]

In order to solve such a problem, in the present invention, a paper in which a plurality of alignment patterns are drawn outside the drawing range is used, and the sensor is set in the X direction and the Y direction.
The coordinates of at least two sets of alignment patterns obtained by the sensor moving across the alignment patterns to move in the direction are read, and the front and back patterns are aligned based on the read coordinates of the alignment patterns. There is provided a front and back pattern alignment method in an XY plotter device characterized by the above.

[0005]

In this way, since the front and back are aligned based on the coordinates automatically read by the sensor, it is possible to solve the problem of individual differences due to humans as in the past, and moreover, due to temperature change and humidity change Even if a dimensional error occurs in the position, the front and back can be accurately aligned.

[0006]

1 shows the basic structure of an XY plotter device according to the present invention, and particularly shows an example of a multi-pen type XY plotter device. In FIG. 1, the apparatus 10 includes a portion 12 on which a sheet is placed and an arm 1 that moves on this portion in the X direction.
3a, a carriage guide 13b incorporated on this arm, a pen head 14 that moves in the Y direction along this guide, and a pen stock 15 adjacent to the periphery of the paper stacking portion 12, and this pen stock. Pen 16
(8 in this example) are installed. Reference numeral 17 is an operation panel.

FIG. 2 shows a control system of a basic system of the apparatus 10. In FIG. 2, 21 is a pen in which a pattern generator 21a, a memory 21b, a CPU 21c, an A / D converter 21d, a counter 21e, etc. are built. It is a control unit. Reference numeral 22 is a sensor characterized by the present invention. The sensor 22 is attached to a part of the frame 24a of the pen driving unit 23 of the pen head 14 shown in FIG. It is composed of various optical sensors and performs the operation of reading the line segment drawn on the paper. The pen drive unit 23 is configured to move along the carriage guide 13b incorporated in the arm 13a shown in FIG. Further, 24 is a motor control circuit, 25,
26 is a pen head 1 under the control of this motor control circuit 24.
4 is a motor that rotates so as to move the arm 13a in the X and Y directions, respectively. 28 is the sensor 2 described above.
2. A drawing mechanism unit including an encoder 23a and the like in addition to the pen drive unit 23. Of course, the drawing mechanism 28 includes a pen up / down mechanism, a pen XY movement mechanism, and the like that operate in association with the above-described components.

Under such a structure, first, step S1 of FIG. 6 is started, and as shown on the surface on the left side of FIG. The drawing paper P, in which the symbol) is drawn by printing or printing in the upper right corner, the lower left corner, and the lower right corner of the surface of the paper outside the drawing area, is arranged at the paper setting position of the apparatus 10. In this case, the front and back alignment pattern may be drawn at the same time as the drawing work, or may be drawn in advance before drawing. The central triangular figure is a figure drawn on the front side.

Next, in step S2 of FIG. 6, the paper P is turned over and placed at the paper installation position. Next, a vertical line A1 that is a straight line segment that extends above the A pattern on the paper P (back side) on the right side of FIG. 4 is crossed left and right by the sensor 22, and as shown in FIG. ,
O2 is obtained, and the X coordinate PXA is stored in the memory 21b with the midpoint of the peak value coordinates as the center of the line width 31. Next, A
A horizontal line A2, which is a straight line segment extending above the pattern, is vertically crossed by the sensor 22 to obtain outputs O1 and O2 of the sensor 22 as shown in FIG. Memory 2 with Y coordinate PYA as the center
Store in 1b.

Next, the sensor 22 is moved to the portion of the B pattern on the right side of FIG. 4, and the sensor 22 crosses the vertical line B1 which is a straight line segment extending above the B pattern to the left and right. Then, the X coordinate PXB of the vertical line is read and stored in the memory 21b. Then, the sensor 22 crosses the horizontal line B2, which is a straight line segment extending above the B pattern, vertically to obtain outputs O1 and O2 of the sensor 22 as shown in FIG. The Y coordinate PYB is stored in the memory 2 as the center of the line width 31.
Store in 1b. Similarly, the sensor is moved to the portion of the pattern C in FIG. 4 to read the coordinates of PXC and PYC.

The coordinate data PXA, P of the A, B, C patterns thus obtained and stored in the memory 21b.
Drawing on the back side is performed based on YA, PXB, PYB, PXC, and PYC.

Although the + sign is used as the A, B, and C marks in this embodiment, these patterns only need to be able to read the X and Y coordinates of that portion. Needless to say, the line segments extending in the Y direction may be arranged in a hook shape, or may have a pattern of another shape. Further, in this embodiment, although three patterns are used as the alignment patterns, it is needless to say that the number may be two.

[0013]

According to the present invention, since the front and back are aligned on the basis of the coordinates automatically read by the sensor, it is possible to solve the conventional problem of the individual difference due to humans.
Moreover, even if a dimensional error occurs in the paper due to a temperature change or a humidity change, the front and back positions can be accurately aligned.

[Brief description of drawings]

FIG. 1 is a diagram showing a basic configuration of an XY plotter device according to the present invention.

FIG. 2 is a diagram showing a basic configuration of a control system of the plotter device shown in FIG.

FIG. 3 is a configuration diagram showing a specific example of the pen head shown in FIGS. 1 and 2.

FIG. 4 is a diagram showing a front side and a back side of a sheet to which the present invention is applied.

FIG. 5 is a diagram showing an output voltage waveform obtained from a sensor.

FIG. 6 is a flowchart explaining the operation of the present invention.

[Explanation of symbols]

 10 Device 12 Paper Placement Part 13a Arm 13b Carriage Guide 14 Pen Head 15 Pen Stock 16 Pen 17 Operation Panel 21 Pen Control Unit 21a Pattern Generator 21b Memory 21c CPU 21d A / D Converter 21e Counter 22 Sensor 23 Pen Drive Unit 24a Frame 24 Motor Control circuit 25, 26 Motor 28 Drawing mechanism section P Paper S1, S2, S3 Step

Claims (1)

[Claims] 1. At least 2 obtained by using a paper on which a plurality of alignment patterns are drawn outside the drawing range and moving the sensor in the X and Y directions so that the sensor traverses these alignment patterns. A front and back pattern alignment method in an XY plotter device, characterized in that the coordinates of a set of alignment patterns are read and the positions of the front and back patterns are aligned based on the read coordinates of the alignment patterns.