JPH03143697A - Electrostatic attraction power control for automatic drawing machine - Google Patents

Abstract

PURPOSE:To shorten the time required for paper to leave an electrostatic attraction surface by detecting whether paper on an electrostatic attraction plate is roll paper or cut paper and increasing the attractive paper of the electrostatic attraction plate when a cut paper is used and reducing the attractive power when a picture is drawn continuously on a roll paper. CONSTITUTION:A controller interprets whether or not paper spread over an electrostatic attraction plate 6 is cut paper, and sets the plate 6 to a normal electrostatic attraction level, if the cut paper is used. Next, the first and second electrodes 18, 20 of the electrostatic attraction plate 6 are energized, and the paper attractive power of an electrostatic attraction area is adjusted to a normal level. After this, the controller performs picture drawing action, and turns power to the electrostatic attraction plate 6 OFF, if picture drawing is completed using data of a single drawings. Then the controller interprets whether or not picture drawing should be continued, and completes the drawing, if the answer is negative. Furthermore, if the controller interprets that paper on the electrostatic attraction plate 6 is roll paper, it adjusts the electrostatic attractive power to a low level and energizes only the first electrode 18. In addition, the controller adjusts the attraction area of the electrostatic attraction plate 6 to the low mode.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for controlling electrostatic attraction force in an automatic drafting machine.

[Conventional technology]

In an automatic drafting machine that fixes paper onto an electrostatic adsorption plate using an electrostatic adsorption plate, a configuration in which the electrostatic adsorption force is varied is disclosed in Japanese Patent Application Laid-open No. 149174/1983. However, this publication does not disclose the technical idea of appropriately varying the electrostatic attraction force depending on cut paper or roll paper.

[Problem that the invention seeks to solve]

When drawing using roll paper, the roll paper is under tension and is stretched tight on the electrostatic adsorption plate, so even if the electrostatic adhesion force is weak, the roll paper will still be able to reach the electrostatic adhesion plate. Fixedly adhere to the drawing surface.

However, when using roll paper, if the electrostatic attraction force is made as strong as when using cut paper, even if the attraction force is turned off, the roll paper will remain in close contact with it due to the residual charge on the electrostatic attraction surface, and will not separate. There was a defect in that it took a long time until the paper was ready to be transported. The present invention aims to eliminate the above-mentioned defects.

[Means to solve problems]

In order to achieve the above object, the present invention develops roll paper or cut paper on an electrostatic adsorption plate, fixes these papers to the electrostatic adsorption plate by the adsorption force of the electrostatic adsorption plate, and converts them into five-core paper. In an automatic drawing machine for drawing, it is detected whether the paper on the electrostatic adsorption plate is roll paper or cut paper, and when using cut paper, the adsorption force of the electrostatic adsorption plate is strengthened, and when continuous drawing is performed using roll paper. In this case, the adsorption force is made weak.

〔Example〕

The structure of the present invention will be described in detail below with reference to embodiments shown in the accompanying drawings.

In FIG. 2, reference numeral 2 denotes the body of an automatic drafting machine, on which is fixed a table 4, and a known electrostatic adsorption plate 6 for adsorbing and fixing paper on the top surface of the table 4 is fixed. . Above the electrostatic adsorption plate 6, a drawing head 8 is supported by a known XY rail support mechanism so as to be movable parallel to the electrostatic adsorption plate 6.

A roll paper supply device 1° and a roll winding device 12 are disposed at the front and rear of the machine body 2. The roll paper supply device 10 rotatably supports a roll paper 14, and the roll paper 14 is spread out on the electrostatic adsorption plate 6 and is wound up by the roll paper winding device 12. Reference numeral 16 denotes a paper type detection sensor disposed between the side surface of the table 4 and the roll paper winding device 12. When the paper is spread out on the electrostatic adsorption plate 6, the controller detects that the sensor 16 detects the paper type. When it is on, the electrostatic adsorption plate 6
You can recognize that the paper type above is roll paper, and when it is off, it is cut paper. As shown in FIG. 3, the electrostatic adsorption plate 6 is provided with a first electrode 18 and a second electrode 2o.

When both the first and second electrodes 18 and 20 are energized, there is a normal mode with strong electrostatic force, and only the first electrode 18 is energized to create a relatively weak adsorption force on the electrostatic adsorption plate 6. The case where this occurs is set as weak mode. Movement of the drawing head 8 of the automatic drawing machine in the X-Y direction, up and down of the pen,
The roll paper winding device 12, the attraction force mode of the electrostatic attraction plate 6, etc. are configured to be controlled by a controller (not shown) including a computer of the automatic drafting machine.

Next, the operation of the automatic drawing machine controller will be explained with reference to FIG.

The drawing start operation is entered from label 1, and the controller judges in judgment block 2 whether or not it is in the electrostatic adsorption force auto mode. If an affirmative determination is made, the output state of the paper type detection sensor 16 is detected in block 3, and in judgment block 4, it is determined whether or not the paper developed on the electrostatic adsorption plate 6 is a cut paper. If the controller determines the affirmative, in block 5, the controller sets F to the normal electrostatic adsorption force. Next, in block 6, both the first and second electrodes 18, 20 of the electrostatic attraction plate 6 are energized, and the paper attraction force of the electrostatic attraction area is set to F (normal attraction force). Next, the controller executes block 7
The drawing operation is executed in block 8, and when drawing for one drawing is completed, the electricity to the electrostatic adsorption plate 6 is turned off in block 8. next,
At decision block 9, it is determined whether or not to continue drawing, and a negative decision is made.

At judgment block 4, which completes drawing, it is judged that the paper on the electrostatic adsorption plate 6 is roll paper.

In block 16, set F to weak electrostatic adsorption force, and in block 6
Then, only the first electrode 18 is energized, and the attraction area on the electrostatic attraction plate 6 is set to the weak mode. When drawing for one drawing is completed, the adsorption force is turned off, and it is determined in decision block 9 whether or not to continue drawing. The sensor 16 determines whether there is roll paper or not in the decision block 10.
Judging by the output. r3-If there is no paper, prepare a new paper in block 15. If the judgment block 1o is affirmative, the block 11 waits for the time (approximately 5 seconds) until the roll paper 14 is separated from the attraction surface of the electrostatic attraction plate 6, and then the roll paper winding device 12 is turned on in the block 12. It is driven to transport the roll paper 14 by one printing section, and develop one printing section of new paper surface on the electrostatic adsorption area. The suction mode may be set manually from the keyboard of the controller in block 13, and in this case, a plurality of modes can be set in addition to the two stages of normal mode and weak mode. You can use different modes depending on the type of paper, such as paper that is easy to attract or paper that is difficult to attract. In addition, the adsorption force can be changed to two or more levels, and can be used depending on the season. block 1
When the manual instruction for the suction mode is given in step 3, the controller then determines whether the suction force is in the normal mode in decision block 14, and if it determines in the affirmative, it moves to block 5.
If a negative determination is made, the process moves to block 16.

〔effect〕

Since the present invention is configured as described above, the electrostatic adsorption force can be varied by detecting the type of cut paper or roll paper on the controller side of the automatic drafting machine. There are effects such as being able to shorten the time it takes for the material to separate from the electrostatic attraction surface.

[Brief explanation of the drawing]

FIG. 1 is a flowchart, FIG. 2 is an external view of the automatic drawing machine, and FIG. 3 is an explanatory diagram. 2... Machine body, 4... Table, 6... Electrostatic adsorption plate, 8... Drawing head, 10... Roll paper supply device,
12... Roll paper winding device, 14... Roll paper, 16... Paper type detection sensor, 18. 20... Electrode.

Claims (1)

[Claims] (1) Spread the roll paper or cut paper on the electrostatic adsorption plate,
These papers are fixed to the electrostatic adsorption plate by the adsorption force of the electrostatic adsorption plate, and in an automatic drawing machine that draws a drawing on the paper, it is detected whether the paper on the electrostatic adsorption plate is roll paper or cut paper. An electrostatic attraction force control method, characterized in that when cut paper is used, the attraction force of the electrostatic attraction plate is made strong, and when continuous drawing is performed using roll paper, the attraction force is made weak.