JPS62246798A - Pen-kind detector - 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 Field of the Invention The present invention relates to a pen type detection device used in a plotter or the like equipped with an automatic pen exchange device.

2. Description of the Related Art Conventionally, the pen type detection device described above is constructed as shown in FIG. Pen 1 is my own pen! Pen type identification stickers 9 and 10 are pasted on the top depending on the type. The pen 1 is held by a pen holder 2, and is fixed to a movable part 3 of a motor for vertically driving the pen. Reference numeral 4 designates the outer casing of the motor for vertically driving the pen, and on the upper part there are first and second 7 sensors A at positions facing the pen type identification stickers 9 and 10.
, B are fixed.

Here, assuming that the seal 9 is 1148 and the seal 10 is white, the light emitted from the light emitting part 5 of the first photosensor A reaches the seal 9, but since the seal 9 is black, 2-7 There is no reflected light to the light receiving section 6 of the sensor A. The light emitted from the light emitting section 7 of the second photosensor B is reflected by the white seal 10 and reaches the light receiving section 8 of the second photosensor B. By detecting the amount of light received by the light receiving section 6.8, the type of pen in the pen holder 2 can be determined.

Problems to be Solved by the Invention In such a conventional configuration, is it necessary to have a sensor for detecting the pen type in a movable part such as the pen holder 2 or the Y-axis carriage?
There is a problem in that the pen storage section must have a sensor for the number of pens.

Furthermore, when detecting a large number of pen types, it is necessary to provide a large number of sensors.

SUMMARY OF THE INVENTION The present invention aims to provide a pen type detection device that can identify various pen types without providing a sensor for detecting pen types in either the movable part or the pen storage part. The pen type detection device of the invention is provided with a servo means for performing error play between an input voltage and a position voltage corresponding to the position of the pen holder to move the pen holder to a position corresponding to the input voltage, The pen is provided with a protrusion whose protrusion amount corresponds to the type of the pen, and a specified voltage for instructing the detection of the pen type and this specified voltage are applied to the servo means as the input voltage to control the pen holder. The present invention is characterized by being provided with a pen identification means for determining the type of pen being attached according to an error voltage between the protrusion of the pen inside and the voltage at the position when the protrusion is in contact with a predetermined reference surface. do.

Effect According to this configuration, the pen type discrimination command voltage is used as the input voltage of the servo means to drive the pen holder toward the reference surface regardless of the pen type, so the amount of protrusion of the protrusion varies depending on the pen type. If they are different, the voltage difference between the position voltage of the pen holder when the protrusion is in contact with the reference surface and the pen type discrimination command voltage increases as the amount of protrusion of the protrusion increases, and from this differential voltage, the pen type discrimination means determines the pen type.

EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 to 4.

FIG. 1 shows a pen type detection device of the present invention. pen holder 2
is moved in the Y-axis direction by a Y-axis motor 12 via a Y-axis knot 11. The Y carriage 13 is moved in the X-axis direction by an X-axis motor 15 via an X-axis tension thread 14. A potentiometer 16 is attached to the shaft of the X-axis motor 15, and a voltage depending on the position of the pen holder 2 is detected. Position voltage from potentiometer 16 and command voltage 17
The error signal is amplified by the servo amplifier circuit 18 and the
Power is supplied to the shaft motor 15. Reference numeral 19 denotes a pen type identification circuit which uses the output signal of the servo amplifier circuit 18 as an input signal, and its configuration will be explained in detail later in this paper. Reference numeral 20 denotes a storage section in which unused pens are stored, and is fixed at position 1 facing the Y carriage 13.

As shown in FIGS. 2(a) to (C), the pen 1 is provided with protrusions 21 of protrusions IL1, 12, and 13 according to the pen type, and when the pen type is detected, the protrusions 21 shown in FIG. 2(a) The pen holder 2 in which the pen to be used in ~(C) is attached is moved to the first end C side of the storage section 20 by the Y carriage 13.
The Y-carriage 13 is moved as shown in the figure, the command voltage 17 is applied, the X-axis motor 15 is operated via the servo amplifier circuit 18, and the Y-carriage 13 is moved toward the storage section 20 by the X-axis tension thread 14. let

Here, the level of the command voltage 17 is determined by the level of the protrusion 21 of each pen 1.
When the amount of protrusion is 11<12<13, the smallest protrusion IL1 is set at a level that just contacts the reference surface 22 of the storage section 20, as shown in FIG. 3(a). In this case, as shown in FIG. 2(a), the pen 1 with the protrusion amount L1
Considering the case where pen type detection is instructed while the pen is attached to the pen holder 2, the position voltage of the output of the potentiometer 16 and the command voltage 17 when the Y carriage 13, which has been instructed to move by the command voltage 17, stops. is equal to

In addition, as shown in FIG. 2(b), the protrusion amount L2 (L2>Ll)
When pen type detection is instructed while the pen 1 is attached to the pen holder 2, the Y carriage 13, which is instructed to move by the command voltage 17, moves so that the protrusion 21 moves as shown in FIG.
) than in the case of Fig. 3(a) (L2-Lt )
It came into contact with the reference surface 22 at the front position and stopped.
Position voltage of output of potentiometer 16 and command voltage 17
does not match, and an error voltage corresponding to (L2-11) is generated. This is also the case when a pen with protrusion ff1L3 is attached as shown in FIG. 2(C), and in this case, an error voltage corresponding to (Ll-11) is generated.

In the pen type identification circuit 19, as shown in FIG.
The control circuit 2
3. In the control cycle M23, the writing pressure of the pen on the plotter, the speed of pen sliding, etc. are controlled depending on the type of pen.

As described in the detailed description of the invention, in the pen type detection device of the present invention, a pen mounted on a pen holder is provided with a protrusion whose protrusion amount corresponds to the pen type, and a specified voltage for instructing pen type detection is provided. This specified voltage is applied to the servo means as the input voltage, and according to the voltage difference between the position voltage and the position voltage when the protrusion of the pen attached to the pen holder is brought into contact with a predetermined reference surface. Since a pen@1iII separate means for determining the type of pen being attached is provided, the following effects are achieved.

■ Since the error signal of the servo means is used to detect the type of pen, it is possible to discriminate between many types of pens by simply adding a simple discrimination means.

■ Since the error signal of the servo means is used to detect the type of pen, malfunctions do not occur due to the influence of external light.

[Brief explanation of drawings]

Fig. 1 is a schematic block diagram of a pen type detection device according to an embodiment of the present invention, Fig. 2 is a perspective view showing the shape of each pen in Fig. 1, Fig. 3 is an operation explanatory diagram, and Fig. 4 is a FIG. 1 is a block diagram of a pen type identification circuit, and FIG. 5 is a schematic diagram of a conventional pen type detection device. DESCRIPTION OF SYMBOLS 1...Pen, 2...Pen holder, 11...Y-axis tension thread, 12...Y-axis motor, 13...Y carriage, 14...X-axis tension thread, 15...X Axis motor, 1B
... Potentiometer, 17... Command voltage, 18.
... Servo amplifier circuit, 19 ... Pen type identification circuit, 21
...Protrusion, 22...Reference plane, Ll, L2. Ll... Prominence agent Yoshihiro Morimoto -〇- Reed Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1. A servo means is provided to execute an error calculation between the input voltage and a position voltage corresponding to the position of the pen holder and move the pen holder to a position corresponding to the input voltage, and the pen attached to the pen holder has its own A protrusion with a protrusion amount corresponding to the pen type is provided, and a specified voltage for instructing pen type detection and this specified voltage are applied to the servo means as the input voltage to predetermine the protrusion of the pen when the pen holder is attached. A pen type detection device is provided with a pen type identification means for determining the type of pen being attached according to an error voltage with respect to the position voltage when the pen is in contact with a reference surface.