JPH0753478B2 - Control method in automatic drawing device - Google Patents

Description

The present invention relates to a control method for an automatic image device (XY plotter).

[Conventional technology]

When using several types of writing instruments on an XY plotter,
Depending on the type of writing instrument, such as a ball-point pen or a hollow pen, the writing pressure on the screen during writing of the writing instrument is changed immediately. XY plotters that change the writing pressure depending on the type of writing instrument are disclosed in Japanese Utility Model Laid-Open No. 59-176598 and Japanese Patent Laid-Open No. 57-63297.

[Problems to be solved by the invention]

When the writing implement is raised with respect to the drawing screen, when a constant upper boosting current PG is applied to the moving coils for all the writing implements as shown in FIG. 2, it depends on the weight difference of the writing implement, that is, the type of the writing implement. , The time required to raise the writing instrument t1, t2
Is different. If you set the writing tool rise waiting time based on the longest time, for example, t2, when the writing tool is light in weight,
Lost time tL occurs. Incidentally, when the writing instrument holding member collides with the upper limit stopper when the writing instrument is raised, the holding member bounces. If the writing tool moves down to the drawing operation and the writing tool descends during this bounding, the descending stroke changes due to the bounding of the writing tool, so that the writing tool strongly hits the drawing screen and the writing tool is damaged. In order to avoid this habit, the waiting time is set in order to shift to the drawing operation after the bound B (see FIG. 2) of the writing instrument is lost. An object of the present invention is to eliminate loss time when the writing instrument is raised.

[Means for solving problems]

In order to achieve the above object, the present invention, in the automatic drawing device, stores the time required for raising the writing implement for each type of the writing implement, and corresponds to the writing implement to be used after the writing implement raising signal is input to the writing implement lifting drive unit. After a certain amount of time has passed, the drawing head shifts to the drawing operation.

[Action]

With the above configuration, when the writing implement holding member is locked by the upper limit stopper and stands still when the writing implement is raised, the drawing head immediately shifts to the drawing operation, so that the writing implement holding member remains in contact with the upper limit stopper. The time to wait for the drawing operation, that is, the lost time can be eliminated.

〔Example〕

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

3 to 5, reference numerals 2 and 2a denote Y rails movably supported on the table 4 in the X coordinate direction, to which a Y cursor 6 is movably attached. Said Y
A drawing head 8 is connected to the cursor 6, and a writing tool holding member 10 is supported by a guide 12 on a substrate 8a of the head 8 so as to be vertically movable. The writing tool holding member 10 includes a writing tool 14
Is detachably fixed. A moving coil 16 is fixedly mounted on the holder attached to the writing tool holding member 10, and the moving coil 16 faces the field forming portion 18 arranged on the substrate 8a. The moving coil 16
When a positive current is applied to the writing instrument holding member 10,
The writing tool 14 is lowered in association with the holding member 10 so that the tip of the writing tool 14 contacts the paper on the table 4. When a negative polarity current is applied to the moving coil 16, the writing instrument holding member 10 is configured to rise until it is locked by the upper limit stopper 22 fixed to the substrate 8a. The Y rails 2, 2a move in parallel in the X coordinate direction along the table 4 when the X motor is driven, and the Y cursor 6 moves when the Y motor is driven.
Is configured to move along. In FIG. 1, each of the timers 30, 32, 34 is set with a time required for the writing implement to descend, that is, a waiting time, for each type of writing implement, and when a timing pulse is input to the timer,
It is configured to delay the pulse and output a time-up pulse when a predetermined time (waiting time) has elapsed. Similarly, the timers 36, 38, and 40 are set with the time required for raising the writing implement, that is, the waiting time. The writing tool 14 held by the writing tool holding member 10 is provided with a code signal indicating the type of pen, that is, the type of ballpoint pen, hollow pen, or the like. This device is configured so that the writing tool can be exchanged between the pen stocker on the table 4 side and the drawing head 8. The pen type designation device 42, which is an optical reader provided on the side of the drawing head 8, reads the code signal and inputs the pen type code signal to the CPU 44. C
Based on the pen type code signal, the PU44 sets the writing pressure when the writing implement contacts the screen, and inputs the digital information to the input end of the waveform shaping circuit 46, and the AND gate.
An AND gate corresponding to the pen type, for example, 50 is selected from 50, 52, and 54, and a signal of "1" is supplied to one input terminal of the AND gate to make the AND gate 50 conductive. The waveform shaping circuit 46 sets a writing implement falling waveform voltage signal H1 composed of a voltage D corresponding to the writing implement descending current signal and a voltage PF corresponding to the writing implement current signal, as shown in FIG. 1, based on the writing pressure digital signal. To do. Further, the waveform adjusting circuit 48 is set with the writing implement rising current signal U shown in FIG. 2 and the writing implement rising waveform voltage signal H2 corresponding to the rising pressure current signal PG for pressing the writing implement holding member 10 against the upper limit stopper 22. Has been done. When the writing instrument 14 is in the raised position, the writing instrument holding member 10 is elastically contacted with the upper limit stopper 22 by the elasticity of the spring 20.
When the CPU 44 outputs the pen down signal of "1", the start signal is applied to the input terminal of the timer 30 and the waveform shaping circuit 46. This start pulse signal causes the timer 30 to start the delay operation, and the waveform shaping circuit 46 outputs the writing implement falling waveform voltage signal H1 to the pen up / down driver 62. As a result, the descending current signal and the writing pressure current are supplied to the moving coil 16, and the writing instrument 14 descends and abuts on the screen. When the time corresponding to the pen type, that is, the waiting time elapses, the timer 30 outputs a time-up pulse to the OR circuit 66.
Is output to the one-shot multi-vibrator 64 to operate it, and the output of the vibrator 64 is input to the CPU 44 as a motor start signal. Based on this input signal, the CPU 44 drives the motor driver 70 to drive the drawing head 8
Shift to drawing operation. Next, when the CPU 44 outputs a pen-up signal of "1", it is applied to the input ends of the timer 36 and the waveform shaping circuit 48 for which the waiting time is set according to the selected writing instrument. As a result, the timer 36 starts the signal delay operation, and the waveform shaping circuit 48 supplies the writing implement rising waveform voltage signal H2 to the driver 62. As a result, the current signals U and PG shown in FIG. 2 are supplied to the moving coil 16, and the writing instrument holding member 10 rises to come into contact with the upper limit stopper 22. When the time corresponding to the pen type, that is, the waiting time t1 or t2 elapses, the timer 56 outputs a time-up pulse signal to output the one-shot multivibrator 64.
To supply a pulse signal for starting the motor to the CPU 44. CPU44, based on this motor start pulse signal,
Move to drawing operation. The above current signal PG when the writing instrument is raised
Alternatively, the writing tool holding member 10 may be pressed against the upper limit stopper 22 only by the pressure of the spring 20 without being supplied to the moving coil 16. The operation when the writing tool holding member 10 is pressed against the upper limit stopper 22 only by the spring 20 is shown by a dotted line in FIG.

〔effect〕

As described above, according to the present invention, the waiting time from the start to the end of raising the writing tool is changed depending on the type of the writing tool, and the drawing operation is started after the waiting time elapses, so that the loss time in drawing can be eliminated. There is an effect that the drawing speed can be increased.

[Brief description of drawings]

1 is a block circuit diagram, FIG. 2 is an explanatory diagram, FIG. 3 is a sectional view, FIG. 4 is a plan view, and FIG. 5 is a side view. 2, 2a …… Y rail, 4 …… Table, 6 …… Y cursor, 8…
… Drawing head, 8a …… Substrate, 10 …… Writing tool holding member, 12…
… Guides, 14 …… Writing instruments, 16… Moving coils, 18…
… Field component, 20 …… Spring, 22 …… Upper limit stopper

Claims (1)

[Claims] 1. A drawing head is provided with a moving coil that can be moved up and down, and a current for the moving coil is controlled to drive a writing tool holding member connected to the moving coil in a direction perpendicular to the drawing screen to raise the writing tool. In a device in which a constant up-boosting current is applied to the moving coil and the brush tool holding member is elastically contacted with an upper limit stopper provided on the drawing head, a rising wait time is increased according to the type of the writing tool. When the rising waiting time has elapsed from the start of raising the writing implement, a writing implement rise completion signal is generated, and based on this writing implement rise completion signal, the drawing head is driven in the drawing direction with respect to the drawing screen. A method for controlling an automatic image device, characterized in that.