JPH1019515A - Measuring method for measuring mark - Google Patents

Abstract

PROBLEM TO BE SOLVED: To execute high accurate measurement of both of lateral and longitudinal path marks placed 90 deg. rotated with respect to each other, by automatically rotating a measuring device 90 deg.. SOLUTION: When measurement is executed by means of a measuring device, firstly a longitudinal path mark 3 is abutted to X-Y coordinates provided beforehand, then measurement is executed. Next, the measuring device is rotated at an angle of 90 degree. by a stepping motor. At the same time, the measuring device is moved by a distance between side faces of the two path marks 3, 4. The above movement is executed by means of a mechanical guide device. Both of adequate measuring positions of the device (a relative position of the device to the respective mark) with respect to the respective path marks are similarly established. As a result, the measuring accuracy is improved by obtaining the similar advantageous measuring conditions to the lateral and longitudinal directions.

Description

DETAILED DESCRIPTION OF THE INVENTION

The present invention relates to a method for measuring measurement marks, in particular path marks.

2. Description of the Related Art Measuring methods for measuring a measuring mark are known, in which case the printing paper is placed on a flat plate with X / Y coordinates and the measuring mark of the measuring device is given beforehand. X
/ Y coordinate is started and measured.

The disadvantage of this measuring method is that the patent application P
As described in US Pat. No. 4,416,697, inaccurate measurements are made, especially at measurement marks located at different locations, such as pathmarks. Pathmarks of the same shape but mounted on the entire printing paper are measured at the same location on the measuring device. This results in measurement inaccuracies and ultimately affects the quality of the final product.

[0004] It is therefore an object of the present invention to provide a measuring method which can reach a higher measuring accuracy. This problem is solved by the features of the claims. Advantageous refinements of the measuring method according to the invention can be taken from the features of the dependent claims. Next, this measuring method will be described in more detail based on examples. In FIG. 1, the entire printing paper is shown with an array of measurement surfaces 2 on a flat plate of X / Y coordinates.

As depicted in FIG. 2, the measurement surface 2 includes various measurement marks. In particular, each measurement plane 2 includes a vertical path mark 3 and a horizontal path mark 4. They are identical in shape but rotated 90 ° and moved aside. This arrangement helps to understand the range and lateral path errors.

In FIG. 3, a vertical path mark 3 and a horizontal path mark 4 are shown in an enlarged manner. First, a vertical path mark 3 is used so that the measurement by the measuring device can be performed.
Is applied corresponding to a predetermined X / Y coordinate, a measurement is performed, and then the measuring device is rotated 90 ° by a step motor. During this rotation, the measuring device
The path marks 3 and 4 are moved by the distance between the side surfaces. This is done by a mechanical guiding device. Thus, the preferred measuring position of the measuring device for both path marks 3, 4 is likewise established. Measurement accuracy is increased by obtaining the same advantageous measurement conditions.

[Brief description of the drawings]

FIG. 1 shows an entire printing paper with an array of measuring surfaces 2 on a flat plate of X / Y coordinates.

FIG. 2 illustrates a measurement surface including various measurement marks.

FIG. 3 is an enlarged view of a vertical path mark and a horizontal path mark.

[Explanation of symbols]

 1 Whole printed paper 2 Measurement surface 3 Vertical path mark 4 Horizontal path mark

Claims (7)

[Claims] 1. A method for measuring a measurement mark, which method comprises the steps of: (a) measuring a mark on a printing paper, in particular a path mark, on an X / Y coordinate plate for this purpose; 2) the individual measuring surfaces (2) are guided by the measuring device in a predetermined sequence, (b) the path marks (3, 4) in the measuring surface (2) are measured separately and (C) 90
A method for measuring a measurement mark, characterized in that the measurement of the path mark (3, 4) which is moved and placed is performed by automatically rotating the measurement device by 90 degrees. 2. The method for measuring a measuring mark according to claim 1, wherein the measuring device first measures the vertical path marks (3) one after another, and then rotates the measuring device by 90 °. After that, the measurement of the path mark (4) on all the sides is performed. 3. The method for measuring a measurement mark according to claim 1, wherein in each measurement of the measurement surface (2) by the measurement device, a vertical path mark (3) is measured first, and then the measurement device is measured. A method for measuring a measuring mark, characterized in that a 90 ° rotation is performed, and thereafter a measurement of a horizontal path mark (4) is performed according to the updated position. 4. The method for measuring a measurement mark according to claim 1, wherein in each measurement of the measurement surface (2) by the measurement device, a vertical path mark (3) is measured first, and thereafter the measurement device is measured. A method for measuring a measuring mark, characterized in that the measuring device is rotated by 90 [deg.] And, simultaneously with the rotation, the measuring device is placed on a horizontal path mark (4) by a guide device. 5. The method for measuring a measurement mark according to claim 1, wherein the entire measurement apparatus is rotated by 90 °. 6. The method for measuring a measurement mark according to claim 1, wherein the camera (optical and CCD matrix) is rotated by 90 °. Method. 7. A single drawing is attached to this.