JP2000231061A - Motor-driven xy table - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize remote control by driving a top board table only by a wire and a spring without using precision mechanism such as a rack and a pinion and using a servo motor for taking up the wire. SOLUTION: The wire 6 is wound round a pulley 11 attached to the rotary shaft of the servo motor 9 capable of normally and reversely rotating and both ends of the wire 6 are pulled and fixed on two side plates 3 fixed at both ends of the lower part of the top board table through the spring 5. Two side plates 3 are coupled through two shaft bars 4, and the shaft bars 4 penetrate a shaft bar receiving base 7 fixed on a bottom board so as to move, then the top board table is moved by the frictional tension of the wire 6 wound round the pulley 11 by the rotation of the motor 9. Two plates constituted so that the motor 9 may be controlled by the remote control of a position sensor detecting the moving amount of the top board table and a display unit displaying the moving position thereof and a potentiometer setting the moving position are piled up in XY directions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an XY table which is necessary for observing an observation object in a wide range in observation with a video microscope, a microscope, or the like, and which moves the observation object back and forth, right and left, that is, an XY table. For more information,
Uses no mechanical parts such as a ball screw or rack and pinion mechanism, allows remote control operation by motor drive, and has a simple mechanism that is inexpensive and durable.
It concerns the provision of a Y table.

[0002]

2. Description of the Related Art A conventional XY table moving mechanism using a rack and pinion or a ball screw is generally used. A knob is attached to a gear shaft, and the table is moved by turning the knob by hand. Things are normal. In addition, the movement amount is merely a ruler scale. Disadvantages of this type of conventional example are that there is play in the amount of movement due to backlash of the gears, and there is a problem in durability due to mechanical wear. Furthermore, it is not possible to know the amount of fine movement,
Operation is also troublesome.

[0003] In addition, there is a type in which a small amount of movement can be known from the number of pulses by rotating the shaft of a gear using a pulse motor, but the precision of the mechanism is required, and only a large type is generally known. .

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and its purpose is to use a mechanism such as a rack and pinion without using any mechanism. Another object of the present invention is to provide an electric XY table of this kind which is inexpensive and has excellent durability without backlash by a simple mechanism, which enables remote operation using a servomotor.

[0005]

In order to achieve the above object, an electric XY table according to the present invention comprises a pulley attached to a rotating shaft of a servomotor capable of rotating forward and reverse.
Wind the wire and fix both ends of the wire to the two side plates fixed to both lower ends of the top plate table by applying tension through springs, respectively, and connect the two side plates with two shaft rods Then, two shafts are penetrated so that they can slide freely on the shaft holder for fixing the servomotor fixed to the bottom plate and the shaft holder for fixing the position detection sensor on the top plate table. The top plate table is moved by the friction of the wire wrapped around the pulley by the rotation of the servo motor built into the servo motor fixing axle support base. Things. In addition, a separate movement amount indicator is provided to receive the position signal of the position detection sensor of the top plate table fixed to the position detection sensor fixing shaft support and convert it to the movement amount of the top plate table. With the provided position setting potentiometer and the servo control device for controlling the servo motor capable of rotating in the forward and reverse directions, the top table can be freely moved by remote control of the position setting potentiometer, and fine movement can be performed by the movement amount display. The amount of change can also be seen. By using two of them and overlapping them in the orthogonal direction, they function as an XY table.

That is, the present invention does not use a mechanical mechanism as in the conventional product, but moves only by pulling movement of a wire and a spring. At the same time, a position detecting sensor of a top plate table is provided to display a fine moving amount. An electric XY table characterized by using two moving tables, which can be remotely controlled by position control of a servomotor capable of rotating forward and backward, and which are overlapped in an orthogonal direction.

[0007]

Therefore, according to the present invention, the top plate table, which is moved by winding and pulling the wire and the spring, is remotely controlled by the position control of the servo motor capable of rotating forward and backward, and is finely moved by the position detection sensor of the top plate table. It is possible to provide a durable electric XY table with a simple structure, low cost, and no backlash, which can also continuously display the amount.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an electric XY according to the present invention will be described.
An embodiment of the table will be described in detail with reference to FIGS.

FIGS. 1 and 2 are a front view and a side view, respectively, showing the internal structure of an electric XY table according to an embodiment of the present invention.
FIG. 3 is a perspective plan view showing the internal mechanism taken along the line AA in FIG. 2, and FIG.
It is a front view which shows the external structure internal mechanism arrangement | positioning when it is set as a Y table.

In each of FIGS. 1 to 3,
Reference numeral 1 denotes a top plate table in which two side plates 3 are fixed to both lower ends. The two side plates 3 are connected and fixed by two shaft rods 4. The two shafts 4 pass through the servo motor fixing shaft support 7 fixed to the bottom plate 2 and the position detection sensor fixing shaft support 10 respectively.
Slide freely. Reference numeral 9 denotes a forward / reverse rotatable servomotor, which is built in and fixed to a bearing base 7 for fixing the servomotor. Reference numeral 8 denotes a position detection sensor for detecting the position of the top table, and a bearing for fixing the position detection sensor. It is fixed to the table 10. Reference numeral 11 denotes a pulley attached to a shaft of the servomotor 9 and a wire 6 to which springs 5 are attached at both ends is wound several times. The other end of the spring 5 is attached in a state where tension is applied to a position perpendicular to the two immediate plates 3. Thus, the top table 1 can be moved right and left by the rotation of the pulley 11. The position index knob 12 of the top plate position detection sensor 8 is fixed to the top plate table 1, and a position detection signal is continuously output according to the movement of the top plate 1.

The servomotor 9 is capable of rotating forward and reverse with a direct current, and preferably has a built-in speed reduction mechanism for moving the top table 1 at a lower speed.

FIG. 5 shows a slide type variable resistor 21 as the position detecting sensor 8 of the top table according to the present invention.
5 is an example of a circuit based on analog servo control using the above. Reference numeral 22 denotes a position setting potentiometer, and reference numeral 9 denotes a servomotor that drives the top table.

FIG. 5 shows an example of the analog servo control. However, a pulse motor can be used as the servo motor 9 by digital operation control using a digital encoder as the position detection sensor 8.

In the present invention, the motorized XY table is used. However, if the same two X tables are set up and back-to-back and move vertically, the lower X-table can be moved in the Z direction ( Since the function of (vertical direction) can be easily added, it can also be provided as an electric XYZ table.

[0015]

As described above in detail in each embodiment, according to the present invention, the top plate is moved by the frictional pulling force generated by the pulley winding the wire by the rotation of the servomotor. In addition, since the servo motor is controlled by the position detection sensor, there is no cause of the backlash unlike the conventional example, the position reproducibility is excellent, and the movement amount can be displayed with high accuracy by the signal from the position detection sensor. In addition, there are no precision mechanisms, the structure is simple, the durability is excellent, and it has excellent features that are inexpensive and versatile. Also, since it can be moved by remote control of the panel, it is very convenient to use.

[Brief description of the drawings]

FIG. 1 is a front view of an X table section of an electric XY table to which an embodiment of the present invention is applied.

FIG. 2 is a side view of an X table section of the electric XY table.

FIG. 3 is a perspective plan view taken along line AA of FIG. 2;

FIG. 4 is a front view in which FIGS. 1 and 2 are overlapped to form an electric XY table.

FIG. 5 is a circuit diagram showing an example of servo motor analog control of an electric XY table to which an embodiment of the present invention is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Top plate table 2 Bottom plate 3 Side plate 4 Shaft 5 Spring 6 Wire 7 Servo motor fixing shaft holder 8 Table position detector 9 Servo motor 10 Position detection sensor fixing shaft holder 11 Wire take-up pulley 12 Table position Detector position index knob 21 Slide type variable resistor 22 Potentiometer for position setting

Claims (1)

[Claims] 1. A wire is wound around a pulley attached to a rotating shaft of a servomotor capable of rotating forward and backward, and both ends of the wire are respectively attached to two side plates fixed to lower ends of a top plate table, respectively. The two side plates are connected by two shaft rods, and a servo motor fixing shaft fixing base fixed to the bottom plate and a position detection sensor fixing shaft of the top plate table are fixed. The two shafts are allowed to move to the left and right in a penetrated form so that they can slide freely, and the servo motor fixing shaft can be rotated forward and reverse. A servomotor is built-in and fixed, and a position detection sensor for detecting the moving position of the top plate table is fixed to a shaft support for fixing the position detection sensor of the top table. The position index knob of the position detection sensor is connected to the top plate table, and a position setting potentiometer separately provided outside, and a movement amount conversion display that receives the position signal of the position detection sensor and converts it into a movement amount and displays the movement amount. And a servo control device that controls the servo motor that can rotate forward and reverse, by combining the position detection sensor of the top table with the top table, the top table can be freely moved left and right by operating the position setting potentiometer. An electric top table moving device that can be moved is moved in X direction (left and right direction) and Y direction (front and rear direction).
A motorized XY table characterized in that the XY table is arranged so as to be arranged in two stages in the orthogonal direction so as to be moved in a vertical direction.