JP2724319B2 - Drawing method in automatic drafting machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a drawing method in an automatic drafting machine.

[Conventional technology]

2. Description of the Related Art Conventionally, in the case of drawing over a long axis in accordance with a paper feeding method, that is, continuous drawing, desired drawing data must be subjected to scaling processing on the host computer side, and the same data must be output for the number of frames. In addition, it is necessary for the host computer to perform a task of clipping the output data again each time the current clip state is checked for each frame.

[Problems to be solved by the invention]

As is apparent from the above description, there is a defect that the burden on the host computer is large when performing drawing over the long axis, that is, long drawing by an automatic drafting machine. An object of the present invention is to eliminate the above defects.

[Problems to be Solved by the Invention] In order to achieve the above object, the present invention divides drawing data into a plurality of frames, and draws each frame in order on a recording paper so that each frame is continuous. In the connection drawing method, the drawing data and the connection drawing command are transferred from the host computer to the controller on the plotter side, and the minimum coordinate value Xmin in the paper feed direction of the connection drawing data based on the command is transferred to the plotter controller based on the command.
, And the length L of the paper feeding direction for one frame is set, the number of frames N of the connection drawing data is calculated from these data Xmin, L, and the paper feeding operation for each frame and the clipping process of the frame are performed. It is designed to perform joint drawing.

〔Example〕

Hereinafter, the configuration of the present invention will be described in detail with reference to embodiments shown in the accompanying drawings.

FIG. 5 shows the principle of a known paper-driven automatic drafting machine (plotter) for continuously drawing images for each frame on the roll paper 2, and the automatic drafting machine is developed on a platen 4. Roll paper 2 is driven by driving roller 6 and pressing roller 8
And the rotation of the drive roller 6 causes the roll paper 2
Is sent on the platen 4 in the front-back direction (X-axis direction), that is, in the long-axis direction within a length range corresponding to one drawing frame. On the other hand, the pen 14 held by the pen head 12 movable along the Y rail 10 is moved in a direction perpendicular to the feed direction of the roll paper 2 (Y
1) on the roll paper 2
A predetermined drawing is performed for each frame.

Regarding the frame number calculation function in this drawing operation,
This will be described below with reference to the flowcharts shown in FIGS. The frame indicates one drawing area in the drawing data. In the case of the connection drawing, since the drawing data is long in the X-axis direction, as shown in FIG. Is divided into

The program for calculating the number of frames includes the label 1 in FIG.
Enter from. The controller analyzes the data transferred from the host computer in step 2. In the decision block 3, the controller determines whether or not the data is a terminator for link drawing, that is, a command. If the result is negative, the process proceeds to step 4 to update the minimum coordinate value Xmin in the X-axis direction in the plotter mechanical system in the connection drawing data, and returns to step 2. If the determination in the determination block 3 is affirmative, the controller determines in step 5 that the minimum coordinate value Xmin of the drawing data in the X-axis direction in the mechanical system of the plotter.
, The necessary number of frames N is calculated. Next, it is determined in a decision block 6 whether or not the number of frames is zero, and if affirmative, the process ends. If a negative determination is made in the decision block 6, the flow proceeds to the link drawing processing 7. The calculation of the number of frames in block 5 is performed by the following formula.

As shown in FIG. 3, the dimension value in the connection drawing data is determined. Here, assuming that L is the length of one frame, D = (− Xmin) −L / 2 When the number of frames is (N−1), (1) When FRAC (D / L) = 0 (D / L is (When divisible) (N-1) = D / L N = D / L + 1 The above FRC (n) indicates the fractional part designation of n.

(2) When FRAC (D / L) ≠ 0 (when D / L is not divisible) (N-1) = INT (D / L) +1 N = INT (D / L) +2 where INT (n) is Indicates an integer part designation of n.

For example, when D = 6, L = 2, FRAC (D / L) = FRAC (3,0) = 0 From condition (1), N = 6/2 + 1 = 4. For example, when D = 7, L = 2, FRAC (D /L)=FRAC(3,5)=0.5≠0 From condition (2) N = INT (7/2) + 2 = 3.0 + 2 = 5 In FIG. 2, if the label 7 is included in the splicing drawing processing program, In step 8, the controller processes the drawing of the first frame while calculating the clip of the first frame of the drawing data. Next, in step 9, the variable n
Is set to 1.

Next, it is determined in a decision block 10 whether or not the frame number N is one. If the result is affirmative, the drawing is terminated in step 11. If not, the controller instructs the paper feed drive system of the plotter to feed the paper by one frame in step 12, and feeds the paper by one frame in the X-axis direction. Next step
Then, the process goes to 13 to increase the variable n by one (n = n + 1). Next, in step 14, while calculating the clip of the n-th frame, only the data of the n-th frame is stored in the frame sorting buffer. Then move to decision block 15,
It is determined whether or not the paper feeding has been completed. If the determination is negative, the process returns to step S14. Next, it is determined in a decision block 17 whether or not N = n. If affirmative, the drawing is terminated in step 18, and if negative, the process returns to step 12.

〔effect〕

According to the present invention, as described above, the number of frames is automatically calculated on the controller side of the plotter, and the paper feeding operation and the frame clipping process for each frame are performed based on this, so that the host side performs clipping (scissoring). You don't have to. In addition, there are effects that the data output on the host side is reduced, the host side is immediately opened, and a long drawing driver is not required.

[Brief description of the drawings]

1 and 2 are flowcharts, FIG. 3 is an explanatory diagram,
FIG. 4 is an explanatory view, and FIG. 5 is an explanatory side view of the plotter. 2 roll paper, 4 platen, 6 drive roller, 8 press roller, 10 Y rail, 12 pen head, 14 pen, 16 drawing roller.

Claims (1)

(57) [Claims] 1. A connection drawing method for dividing drawing data into a plurality of frames, and drawing each frame in order on the recording paper such that each frame is continuous. The command is transferred to the controller on the plotter side, the plotter-side controller obtains the minimum coordinate value Xmin in the paper feed direction of the connection drawing data based on the command, and sets the length L in the paper feed direction for one frame. Data of Xm
A drawing method in an automatic drafting machine, wherein the number of frames N of the connection drawing data is calculated from in, L, and a sheet feeding operation and a frame clip process are performed for each frame to perform connection drawing.