JPH0218495B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for marking coordinate reading positions.

Conventionally, the coordinate reading position is marked by driving the pen of a plotter attached to the coordinate reading head in a direction approaching the drawing on the support surface, and by bringing the tip of the pen into contact with the drawing. However, according to this method, if the plotter comes within the field of view for reading the coordinates, it will interfere with the reading operation, so the plotter is placed out of the field of view for reading the coordinates. For this reason, the driving stroke of the pen in the direction toward and away from the support surface becomes long. The longer the drive stroke of the pen, the longer the time between when the pen is driven and when it contacts the drawing,
Marking cannot be done quickly, and when the tip of the pen comes into contact with the drawing, excessive shock is applied to the pen tip due to the inertia of the pen, damaging the pen tip. In addition, there were other defects such as the structure of the drawing device being complicated and the weight increasing.

An object of the present invention is to provide a marking method and apparatus that eliminate the above-mentioned defects.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be explained below with reference to a magnetostrictive coordinate reading device shown in the accompanying drawings. Note that some coordinate reading devices have a structure in which a reading head is supported by an XY rail, and the present invention is not particularly limited to magnetostrictive type coordinate reading devices. 2 is a known magnetostrictive vibration type drawing board, which has a built-in magnetostrictive propagation sheet, an XY excitation coil, and an XY detection conductor, and the XY excitation coil and the XY detection conductor are connected to a separately provided controller (not shown). There is.

6 is a coordinate reading head 6, and a keyboard 6a
and a frame body 6b. A data input switch 14 is provided on the keyboard 6a, and a frame 6b is provided with a data input switch 14.
A detection coil 16 is disposed therein. Reference numeral 4 denotes a dielectric plate made of dielectric glass or resin supported by a frame 6b, and a thin wire-shaped heating element 10 is mounted on the bottom surface of the dielectric plate 4.
are stretched in a cross-hair shape, and the cross-hair-shaped heating element 10
constitute the index. A heat source section 12 is built into the keyboard 6a, and is connected to the heat generating element 10 via a heat transfer cable 18. Said coil 1
6 and the heat source section 12 are electrically connected to a cable 20, and are electrically connected to the controller via the cable 20. Next, the operation of this embodiment will be explained. First, the heat-sensitive sheet 8 on which a printed circuit board original drawing etc. is drawn is positioned on the drawing board 2.
Next, the coordinate reading head 6 is placed on the heat-sensitive sheet 8. At this time, the heating element 1 constituting the crosshair indicator
0 comes into contact with the upper surface of the heat-sensitive sheet 8. Note that the heating element 10 may be placed close to the heat-sensitive sheet 8. Next, move the coordinate reading head 6 and read the transparent plate 4.
The center of the index is made to coincide with the coordinate reading point of the thermosensitive sheet 8. Next, when the data input switch 14 is pressed, magnetostrictive vibrations are generated in the magnetostrictive propagation sheet (not shown) on the drawing board 2. This magnetostrictive vibration is detected by the coil 16, and the XY coordinate values of the center point of the index are counted in the counter of the controller.The contents of the counter are displayed on the display section of the controller, and the data is outputted from the output section. . The coordinate reading principle of the above-mentioned magnetostrictive coordinate reading device is
This method is known from Japanese Patent No. 7636 and others, and detailed explanation thereof will be omitted. On the other hand, when the data input switch 14 is pressed, current is supplied from the controller to the heat source section 12 for a predetermined period of time.
generates heat, and this heat is transferred to the heating element 10. The heat of the heating element 10 forms a cross-shaped check mark indicating completion of coordinate reading at the coordinate reading point of the heat-sensitive sheet 8. Furthermore, as shown in Figs. 4 to 6,
A cross-hair indicator 24 is formed on the transparent plate 4 by engraving or the like, and a thin wire-shaped heating element 10 is placed in the center of the indicator 24.
The tip of the heating element 10 may be placed in contact with the surface of the heat-sensitive sheet 8, and the tip of the heating element 10 may be placed in contact with the index 24.
It may be arranged near the center of. still,
In a coordinate reading device of the type in which the coordinate reading head is supported by an XY rail, a magnetostrictive vibration type board is not used, but an ordinary general board is used.

As described above, the present invention uses the heat of the heating element to mark the surface of the heat-sensitive sheet.
Compared to the conventional method of raising and lowering the pen, the marking mechanism and operation can be simplified, so that the purpose described at the beginning can be achieved.

[Brief explanation of drawings]

The drawings show a preferred embodiment of the present invention; FIG. 1 is a plan view, FIG. 2 is a side sectional view, FIG. 3 is an explanatory view, FIG. 4 is a plan view showing another embodiment, and FIG. Same,
The side sectional view and FIG. 6 are explanatory views. 2...Drawing board, 4...Transparent plate, 6...Coordinate reading head, 8...Thermosensitive sheet, 10...Heating element, 12
...Heat source.

Claims (1)

[Claims] 1. A drawing is positioned on a support surface, a coordinate reading head is moved relative to the support surface, and the amount of relative movement of the coordinate reading head in the XY coordinate axis directions with respect to the support surface is calculated. In a coordinate reading method that counts and outputs the count value as data, a drawing is drawn on a heat-sensitive sheet in advance, and this heat-sensitive sheet is positioned on a support surface, while the coordinate reading head is almost in contact with the heat-sensitive sheet. A method for marking a coordinate reading position, characterized in that a heating element is disposed at a position, and the coordinate reading position on the surface of the heat-sensitive sheet is marked by the heat of the heating element. 2 Consisting of a support surface 2 and a reading head 6 movably disposed on the support surface 2 and equipped with a transparent plate 4 on which an index is formed, the amount of movement of the reading head 6 with respect to the support surface 2 is determined. In a device that counts and outputs this count value as data,
A heating element 10 is mounted on the reading head 6 so as to be located at or near the center of the indicator and substantially in contact with the heat-sensitive sheet 8 on the support surface 2.
A coordinate reading position marking device characterized in that a heat source section 12 for generating heat from the heating element 10 is disposed at a position away from the transparent plate 4. 3. The coordinate reading position marking device according to item 2, wherein a thin wire member is used as the heating element 10, and the indicator is constituted by the heating element.