JPS62280098A - Method of controlling x-y plotter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention 1. Detailed Description of the Invention Industrial Application Field The present invention provides a method for drawing lines and characters on paper by moving a writing instrument and paper in the X and Y directions. It is related to.

BACKGROUND ART As shown in FIG. 7, a paper feed roll 3 formed by pressing a drive roll 1 and a presser roll 2 is used to move paper 4 in the X direction, and a writing instrument 5 is moved in the Y direction by a moving mechanism (not shown).
In a so-called paper-driven X-Y plotter that is movable in both directions and vertically, plotting data is input to a small computer 6 as shown in FIG. 8, and plotting command data is sent from the small computer 6. The drawing command data is input to the CPU 7, and the CPU 7 decodes the drawing command data and performs calculations to generate X-Y direction movement data and writing instrument vertical data.According to these data, the drive unit 8 controls the paper feed motor Mx, writing instrument feed motor MY, and A drive control signal is output to the writing instrument vertical source 9 for drawing.

Problems to be Solved by the Invention In such an X-Y plotter, the movable range in which the writing instrument can move in the Y direction is mechanically limited.
Since the movement in the X direction is carried out by the paper feed reroll 3, its movable range is not mechanically limited in any way (by continuing to drive the paper feed motor Mx, the paper 4 continues to be moved in the X direction). .

For this purpose, a drive control signal based on the X-direction movement data that exceeds the size of the set paper due to an input error in drawing data to the small computer 6 or an operation error is transmitted to the paper feed motor Mx [When the paper 4 is fed, the paper 4 is moved from the paper feed roll 3. It will become separated and you will not be able to draw any more.

Note that K, which prevents the paper from falling off, can be achieved by using a detection sensor to detect whether or not the paper itself is on the paper feed roll, but if this is done, the detection sensor must be specially installed, which is troublesome.

Means for solving the problem and action In the calculation command circuit, the X-Y direction movement data other than the maximum movable range based on the size of the paper set in the X-Y plotter is not outputted, and the set paper This prevents the paper and writing instrument from moving beyond the maximum movable range based on the size of the paper.

Embodiment FIG. 1 is an overall perspective view, in which a presser roll 12 is pressed against a drive roll 11 driven by a first motor 10 to form a paper feed roll 13, and this paper feed roll 13 feeds a paper 14.
A writing instrument 16 is provided along the main body 15IC extending in the Y direction so as to be movable in the Y direction by a second motor 17, and can be moved up and down by a solenoid 18.

FIG. 2 is a control circuit diagram, in which a data command unit, for example, t) Reel drawing command data R1 sent from the personal computer 20 is inputted to an arithmetic command circuit, exemplified as a CPU 22, via an interface 21; The drawing command data is decoded and calculated to generate X-direction movement data, Y-direction movement data By, and writing instrument up and down data RU.
D and input it to the drive unit 23, and the drive unit 23 outputs the first
- Outputs operation commands to the second motor 10.16 and solenoid 1g.

24 is an external input section, and a maximum movable range setting operation section 25
The maximum movable range, that is, the maximum movable range in which the paper 14 does not fall off the paper feed roll 13, corresponds to the size of paper specified by the maximum movable range setting operation section 25 inputted into the ROM and stored in the ROM. The obtained coordinate value (π+y) is set in RAM. That is, the maximum movable range setting operation section 25 includes a plurality of paper size buttons 26.

On the other hand, it became possible to input a drawing range command from the personal computer 20, and the drawing range was stored in the RAM as a coordinate value (x
+y).

The maximum movable range is the shaded area in FIG. 3, which is within the size of the paper 14 and within the L
It is an area determined by two points, point (lower left) and point U (upper right), and the coordinate values of point L and point U are ZL + yL,
"U + 3'tr) is set in the RAM.The L point is the machine origin, and it is set as z=0.y=0, and the coordinate value of the U point (ZU +
yU ) and set it.

The drawing range is the shaded area in Figure 4,
An area that is within the size of the paper 14 and smaller than the maximum movable range, and is determined by two points, ``(lower left)'' and ``t'' (upper right).
+ '11 t Zu +y11. ) is set in RAMK. In other words, L, t.

The relationship between U and u is L≦L and w≦U.

Next, the details of each part will be explained along with the operation.

For example, when plotting with n-size paper I4 set, press the paper size button 26 corresponding to the n-size paper
, inputs to the CPU 22 that ten-size paper is to be used, and thereby calculates the coordinate point (2'L t 3'L + Z) of the maximum movable range based on the ten-size paper stored in the ROM.
U + 3'U), for example ZL""Ot 3'L:O
, Jy=550ffi, yg=410+m are input and set in the RAM. In other words, in the case of paper size paper, the maximum movable range is 550 m x 410 m.

Then, when a drawing command is inputted to the personal computer 20 and drawing command data R□ is inputted to the CPU 22 via the interface 21, the CPU 22 decodes the inputted drawing command data and performs arithmetic operations to generate X-direction movement data R, The Y direction movement data Rx is used as a coordinate point (xty) and is converted into writing instrument up and down data RUD.

At the same time, the coordinate point (Z, y) of the maximum movable range mentioned above
The calculated X-Y direction movement data.

Compare the coordinate points (xty) of Ry and find the X-Y direction movement data Rx of the coordinate point larger than the coordinate point of the maximum movable range.
, Y so as not to output to the drive section 23.

As a result, even if the X-Y direction movement data Rx, RY is input that exceeds the maximum movable range based on the size of the paper set due to a data error, input error, or operation error in the drawing command, the X-Y direction movement data Rx and RY within the maximum movable range are Since only the Y-direction movement data is output to the drive unit 23, the paper 14 does not separate from the paper feed roll 13 and fall off.

Note that when the power is turned on, the maximum movable range based on the maximum size paper is automatically set in the RAM.

Furthermore, when drawing command data and paper size are input to the CPU 22 as described above, the maximum movable range and xy direction movement data RX + RY are stored in R and AM.

In this state, use the personal computer 20 to set the drawing range to coordinate points (ZL + '/l + "w + '/u)"
When inputted as , the X-Y direction movement data Rx and RY in the range of this coordinate point is sequentially output to the drive section 23, allowing drawing of that part.

In addition, the drawing range can be updated by manually inputting the coordinate values of different U points from the personal computer 20.
At this time, the coordinate point is compared with the coordinate point of the maximum movable range, and the movable range is always limited to the maximum movable range.

The coordinate values ("t+'lt)π,, ylL) of the drawing range sent from the personal computer 20 are R,
AMK is stored, and the relationship is limited by comparing the magnitude with the coordinate value of the maximum movable range ("L + '/L Hπu, yU) within the CPU 22.

For example, if the drawing range A is within the maximum movable range B as shown in Fig. 5(a), that is, if the above-mentioned formula (1) is satisfied, then the drawing range A as shown in Fig. 5(g)) A portion of the chisel is drawn on the paper 14.

In addition, as shown in Fig. 6 (a) K, if the drawing range A partially protrudes from the maximum movable range B, in other words, in the case of , replace point U of the drawing range A with point U of the maximum movable range B. Correct the drawing range to A' and change its coordinates to (”
t*'/l+''U+3'U), only the corrected drawing range R is drawn on the paper 14 as shown in )K in FIG.

Effects of the Invention Even if there is an input error in a drawing command, a data error, or an operation error, the paper and writing instrument will not move beyond the maximum movable range based on the paper size, which prevents the paper from separating from the paper feed roll and falling off. It can be prevented.

[Brief explanation of the drawing]

1 to 6 show embodiments of the present invention, and FIG.
An overall perspective view of the Y plotter, Fig. 2 is a control circuit diagram, Fig. 3 is an explanatory diagram of the maximum movable range, Fig. 4 is an explanatory diagram of the plotting range,
Figures 5(a), (b) and 6(a), (b)
7 is a perspective view of a conventional X-Y plotter, and FIG. 8 is a control circuit diagram thereof. 14 is paper, 16 is writing utensil.

Claims (1)

[Claims] The drawing command data sent from the data command unit is converted into X and Y direction movement data by the calculation command circuit, and the paper 14 and writing instrument 16 are moved in the X and Y directions based on the X and Y direction movement data. A method for controlling a Y plotter, characterized in that the arithmetic command circuit does not output X-Y direction movement data outside the maximum movable range based on the size of paper set in the X-Y plotter. - Y plotter control method.