JPS6018706A - Driving device for measuring machine - Google Patents

Abstract

PURPOSE:To perform accurate and quick measurement, by providing a function, by which speed can be changed based on the slant angle of an operating rod, in a joy stick. CONSTITUTION:When the operating rod of a joy stick 21 is slanted in the desired direction; to which mode of modes M1-M4 the output signal Vtheta from an X direction potentiometer 28 belongs is identified in window comparator 521- 524. Namely, when the slant angle theta of the operating rod is within the angle range of the mode M1, a mode signal MS1 is outputted from the window comparator 521. In this way, the slant angle of the operating rod is divided into the four stages of the modes M1-M4 for every specified angle range. Sliding plates 8 and 10 of a work mounting table 2 are moved at a different speed for every mode of M1-M4 by pulse motors 7 and 9. Since the feeding speed can be changed by the four stages by the slant angles of the operating rod, the accurate and quick measurement can be performed.

Description

[Detailed description of the invention] The present invention relates to a driving device for a measuring machine.

For measuring machines such as projectors and three-dimensional measuring machines, a method is known in which a sensing object such as a workpiece mounting table or touch signal probe is automatically moved by operating a joystick based on the relative positional relationship with the object to be measured. .

This method has the advantage that there are fewer erroneous operations because the tilting direction of the joystick operating lever can be made to correspond to the moving direction of the workpiece mounting table or the like.

However, the conventional joystick drive system only has the function of specifying start/stop commands and directionality of drive parts such as motors. When moving the placement table, there is a problem in that it cannot be positioned accurately and quickly. This is a result of the system not being able to adjust the table movement speed or switching the table movement speed at the control panel.

SUMMARY OF THE INVENTION An object of the present invention is to provide a driving device for a measuring machine that can achieve accurate and quick measurements.

Therefore, the present invention achieves the above object by providing the joystick with the function of varying the speed by changing the tilt angle of the operating rod in addition to the above-mentioned functions.

Specifically, it is a driving device for a measuring machine that relatively moves a detecting section of a measuring machine and an object to be measured by tilting an operation lever of a joystick, the driving device moving the detecting section and the object to be measured relatively. a driving section; a mode identifying means for classifying the tilt angle of the operating rod of the joystick into a plurality of modes for each predetermined angle range; and a speed variable means for driving the driving section at a different speed for each mode of the mode identifying means. d Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 shows the projector of this embodiment. In the figure, a workpiece mounting table 2 is provided at the center of the front surface of the machine body 1, and the workpiece mounting table 2 is movable up and down in the vertical direction (Z-axis direction) by operating an operation handle 3. A screen 5 is provided for magnifying and projecting the shape of the workpiece on 2 through a projection lens 4 serving as a detection section. The workpiece mounting table 2 is connected to the machine body 1.
an elevating plate 6 provided on the elevating plate 6 so as to be movable up and down using the operating handle 3; and an X-direction sliding plate 8 provided on the elevating plate 6 so as to be movable in the left-right direction (X-axis direction) by a pulse motor 7.
and a Y-direction sliding plate 10 which is provided on the X-direction sliding plate 8 so as to be movable in the front-rear direction (Y-axis direction) by a nofrus motor 9. Here, the X
The amount of movement of the direction sliding plate 8 in the X-axis direction and the amount of movement of the Y-direction sliding plate 10 in the Y-axis direction are digitally displayed on a display device 11. Furthermore, both of the pulse motors 7.9 are driven by a joystick 21.

As shown in FIGS. 2 and 3, the joystick 21 has two rotating arms 23 and 24 in the shape of semi-circular rings that are perpendicular to each other and rotate in directions perpendicular to each other around an axis 2526, as shown in FIGS. 2 and 3. It is provided so that it can be freely returned to the neutral position, that is, the position shown in FIG. 3, by means of a spring (not shown). A sliding guide groove 27 is formed in the rotating arm 23 along the longitudinal direction of its curved surface, and an analog signal corresponding to the rotation angle of the rotating arm 23 is output to a shaft 25 on one end side. An X-direction potentiometer 28 is connected. The rotating arm 24 also has a sliding guide groove 2 which is perpendicular to the sliding guide groove 27 along the longitudinal direction of the curved surface of the rotating arm 24.
9 is formed, and a Y-direction potentiometer 30 that outputs an analog signal corresponding to the rotation angle of the rotation arm 24 is connected to the shaft 26 on one end side. Furthermore,
The shaft 32 of the operating rod 31 is provided in both sliding guide grooves 27 and 29.
is slidably inserted. The operating rod 31 is supported so that the lower end of a shaft 32 can be tilted in any direction via a spherical bearing 33 at the intersection of the extension lines of the shafts 25 and 26. Accordingly, when the operating rod 31 is tilted in an arbitrary direction using the spherical bearing 33 as a fulcrum, the rotating arms 23 and 24 are rotated in accordance with the direction in which the operating rod 31 is tilted, and as a result, the rotation from the X-direction potentiometer 28 is An analog signal corresponding to the rotation angle of the movable arm 23 is sent to the Y direction potentiometer 30.
Analog signals corresponding to the rotation angle of the rotation arm 24 are output from each of them. As shown in FIG. 4, these analog signals are transmitted to a control circuit 43 .
44 is input. Note that here, the Noculus motor 7.9 and the driver circuits 43 and 44 constitute a driving section 45.46.

Each control circuit 43,44 is composed of the same components. Therefore, one control circuit 43 will be explained,
A description of the other control circuit 44 will be omitted. The control circuit 43 determines the tilting direction of the operating rod 31 from the increase/decrease in the output signal ■θ of the X-direction potentiometer 28, and issues a forward rotation drive command CWC and a reverse rotation drive command C according to the tilting direction.
A direction determining circuit 51 which applies one of the CWCs to the driver circuit 41, and a direction determining circuit 51 which is provided for each mode M1 to M4 in which the tiltable range of the operating rod 31 of the joystick 21 is divided into a plurality of stages for each predetermined angle range, and the output is provided for each mode M1 to M4. A plurality of window comparators 521 to 524 identify which mode the signal Vθ belongs to, and a mode signal MS1 given from these window comparators 521 to 524.
~A? to the driver circuit 41 in response to MS4? The pulse oscillator 53 is of a variable oscillation frequency type and has a variable pulse number. Each of the window comparators 52
1 to 524 correspond to each mode M1 to M4 as shown in FIG.
A reference voltage generation circuit 61 that sets the voltage value of the potentiometer 28 corresponding to the lower limit angle as the reference voltage Vmin.
and this reference voltage generation circuit 610 reference voltage Vmin
A first comparator circuit 62 that discriminates the magnitude of the output signal ■θ from the potentiometer 28, and a potentiometer 28 corresponding to the upper limit angle of each mode M1 to M4.
The reference voltage generation circuit 63 sets the voltage value of VmaX as the reference voltage VmaX, and the reference voltage generation circuit 630 sets the voltage value of
Output signal V from potentiometer 28 with respect to maX
A second comparator circuit 64 that discriminates the magnitude of θ, and outputs C8U and C from both comparator circuits 62 and 63.
The AND circuit 65 supplies the mode signal MS to the driver circuit 41 when both 8D and 8D are at H level.

Here, for example, as shown in FIG. 7, when the tiltable angle range of the operating rod 31 of the joystick 21 is δ,
Each mode M1 to M4 is ■ 1/! 0δ≦M□<5/
20δ ■ 6/20δ≦M2 (10/20δ■11/20δ
≦M3 < 15/20δ■16/20δ≦M4≦20
/20δ, respectively. Note that the angle range S below 1/20δ and between each mode M1 to M4 is a dead zone. Then, the voltage value of the potentiometer 28 corresponding to the upper and lower limit angles of mode M1 is the reference voltage of the window comparator 521 minIvmaX, and the voltage value of the potentiometer 28 corresponding to the upper and lower limit angles of mode M2 is the reference voltage of the window comparator 522. ■mln, VmaX
Assuming that the voltage values corresponding to the upper and lower limit angles of mode M3 are the reference voltages of the window controller/IP regulator 523,
As rrlaX, the voltage value of the potentiometer 28 corresponding to the upper and lower limit angles of mode M4 is the reference t pressure Vmin of the window comparator 524.

vmaX, respectively. Therefore, as shown in FIG. 8, when the output signal Vθ from the potentiometer 28 is within the signal level range of mode M1, the mode signal MS1 from the window comparator 521 is
The signal is output to the pulse oscillator 53. Also,? When the output signal Vθ from the tensimeter 28 is within the signal level range of mode M2, the window converter/IP regulator 522 color mode signal MS2 is output to the /4′ pulse oscillator 53. Furthermore, when the output signal Vθ from the potentiometer 28 is within the signal level range of mode M3, the window controller ! The mode signal MS3 is outputted from the regulator 523 to the f pulse oscillator 53. Furthermore, when the output signal Vθ from the I tensimeter 28 is within the signal level range of the mode M4, the mode signal MS4 is outputted from the window comparator 524 to the pulse oscillator 53.

On the other hand, different numbers of pulses are applied to the driver circuit 41 according to the mode signals MS1 to MS4 provided from the pulse oscillator 53t;l' and the window controllers 521 to 524. For example, when the mode signal MS1 is given, it is 1 pulse, while the mode signal MS2 is being displayed, it is 300 pulses/second, while the mode signal MS3 is being given, it is 300 degrees/second, and the mode signal MS4 is 300 pulses/second.
It is preset to output 20,000 pulses/second while the pulses are being applied. Note that the number of oscillations in each of these modes is determined by the variable resistor R1 + R2 + R3
It can be changed by +R4. Accordingly, the driver circuit 41 receives the command CWC from the direction determining circuit 51.

The 1,000-lux motor 7 is driven in the direction based on ccwc and at a speed corresponding to the number of pulses from the 9-lux oscillator 53.

Next, the operation of this embodiment will be explained. First, in measurement, after setting the object to be measured on the work placement table 2, the work placement table 2 is raised and lowered by operating the operation handle 3, and the object to be measured is positioned at the focal position of the projection lens 4.

Here, when the operating rod 31 of the joystick 21 is tilted in a desired direction, the rotating arms 23 and 24 are rotated in accordance with the tilting direction of the operating rod 31.

Then, an analog signal corresponding to the rotation angle of the rotation arm 23 is sent from the X-direction potentiometer 28 to the control circuit 43.
From the Y direction potentiometer 30 to the rotating arm 24
An analog signal corresponding to the rotation angle of is sent to the control circuit 44,
each is given.

Now, when the operating rod 31 is tilted at a predetermined angle θ in a desired direction, for example, an output signal Vθ from the X-direction potentiometer 28 is generated.
If X is output, in the direction discrimination circuit 51,
The output signal from the direction potentiometer 28 is a forward rotation drive command CWC or a reverse rotation drive command CCWC depending on the increase or decrease of θ.
is applied to the Drino 4-circuit 41. Further, in each of the window controllers 521 to 524, it is determined whether the output signal Vθ from the X-direction potentiometer 28 belongs to the shift modes M1 to M4. At this time, if the output signal Vθ is within the signal level range of mode M1, the operation lever 3
If the tilt angle θ of mode M1 is within the angle range of mode M1, the window comparator 521 outputs a mode signal MS1. Further, if the output signal Vθ is within the signal level range of mode M2 and the tilt angle θ of the tab operating rod 31 is within the angle range of mode M2, the window comparator 522 outputs the mode signal MS2. Further, if the output signal ■θ is within the signal level range of mode Ml and the tilt angle θ of the operating lever 31 is within the angle range of mode M3, the window controller 523 outputs the mode signal MS3.

Furthermore, the output signal ■θ is within the signal level range of mode M4,
If the tilt angle θ of the tab operating rod 31 is within the angle range of mode M4, the window comparator 524 outputs a mode signal MS4.

On the other hand 1. -P pulse oscillator 53 generates 1 pulse when the mode signal MSl is applied, 300 pulses per second while the mode signal MS2 is applied, and 30007f pulses per second while the mode signal MS3 is applied. , while the mode signal MS4 is being applied, 20,000 nolus is applied to the driver circuit 41 per second. Then, the driver circuit 41 moves the Nofrus motor 7 to the direction determining circuit 51.
The motor is rotated in the direction of the forward rotation drive command CWC or reverse rotation drive command ccwc at a speed corresponding to the number of pulses from the pulse oscillator 53. Accordingly, the X-direction sliding plate 8 moves the operating rod 31 of the joystick 21 at a speed for each mode M1 to M4 corresponding to the tilt angle θ of the operating rod 31.
is moved in the direction in which it is tilted.

Therefore, by operating the operating rod 31 of the joystick 21, the X-direction sliding plate 8 and the Y-direction sliding plate 10 are sequentially moved in a desired direction at a speed corresponding to the tilt angle θ of the operating rod 31 of the joystick 21. For example, since the amount of movement of each sliding plate 8, 10 is displayed on the display device 11, this display device 1
The dimensions of the object to be measured can be measured from the value of 1.

Therefore, according to this embodiment, in addition to the functions of the conventional joystick, the tilting angle of the operating rod 31 is divided into four modes M1 to M4 for each predetermined angle range, and each mode M1 to M4 is divided into four modes M1 to M4.
Each sliding plate 8 of the workpiece mounting table 2 at different speeds,
Since the pulse motor 7.9 for moving the slide plate 8 is driven, each sliding plate 8 is moved depending on the tilt angle of the operating rod 31.
, 10 can be switched in four stages, and as a result, the object to be measured can be aligned accurately and quickly.

Also, the tilt angle θ of the operating rod 31 of the joystick 21
The speed in each mode M1 to M4 is set so that each pulse motor 7.9 is driven at a higher speed as Since the speed can be increased or decreased in stages, the speed can be changed smoothly and easily while viewing the screen.

Moreover, mode M1 is inching, mode M2 is low speed,
Since mode M3 is medium speed and mode M4 is high speed, the speed can be selected depending on the amount of movement of table 2.

Also, since a dead zone S was provided between each mode M1 to M4,
Speed switching can be performed accurately.

In the above embodiment, the tilt angle of the operating rod 31 of the joystick 21 is divided into four modes, but the mode may be divided into any number of modes as long as it is two or more.

For example, if the mode is divided into 7 stages and the speed is set in the order of inching, low speed, medium speed, high speed, medium speed, low speed, and inching as the tilt angle of the operating rod 31 increases, more rapid positioning can be achieved. It is possible.

Further, as shown by the chain line in FIGS. 3 and 5, a start switch button 34 is provided at the upper end of the operating rod 31, and a start signal KS based on the press of this start switch button 34 is sent to the driver circuit 41.
．． Driver circuit 41 .
42 may be driven. In this case, in inching mode M1, it is necessary to configure the pulse motor 7.9 to drive one pulse each time the start switch button 34 is pressed.

Further, the means for driving the sliding plates 8, 10 of the workpiece mounting table 2 is not limited to the pulse motor described in the above embodiment, but may be, for example, a DC servo motor.

In addition, the mode identification means is not limited to the window comparators 521 to 524 described in the above embodiments, but in short, it detects the tilt angle of the operating rod 31 of the joystick 21, and the detection signal belongs to which mode classification. Any configuration may be used as long as it can determine whether the

Further, the functions of the control circuits 43 and 44 in the above embodiment can be achieved by a microcomputer or the like. In this case, the analog signal from the Noyoistink 21 is converted into an A/D
All you have to do is convert it into a digital signal using a converter or the like and input it to the computer.

Although the above embodiments have been described with respect to a projector, the present invention can also be applied to general measuring machines such as three-dimensional measuring machines.

According to the present invention, it is possible to provide a driving device for a measuring machine that can perform measurements accurately and quickly.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a perspective view showing the external appearance of the projector, Fig. 2 is a perspective view showing the external appearance of the joystick, and Fig. 3 is a perspective view showing the internal structure of the joystick. , FIG. 4 is a block diagram showing the overall circuit configuration,
FIG. 5 is a block diagram showing a control circuit, FIG. 6 is a block diagram showing a window comparator, FIG. 7 is a diagram for explaining each mode range, and FIG. 8 is a timing chart. 4... Projection lens as a detection unit, 7, 9... Yars motor, 21... Joystick, 31...
Operation rod, 34...Start switch button, 41.42...
Driver circuit, 45.46... Drive unit, 521-5
24... Window comparator as mode identification means, 53... Norm pulse oscillator as speed variable means. Agent Patent attorney Sanzo Kinoshita (and 1 other person) Figure 1 Figure 2 Figure 3 34 1 224 5-26 ◇ , 7 7 29゛・'23

Claims (1)

[Scope of Claims] (1) A driving device for a measuring instrument that moves a detecting section of a measuring instrument and an object to be measured relative to each other by tilting an operating rod of a joystick, wherein the detecting section and the object to be measured a drive unit that relatively moves the joystick; a mode identification unit that divides the tilt angle of the operating rod of the joystick into a plurality of modes for each predetermined angle range; and a mode identification unit that drives the drive unit at a different speed for each mode. A driving device for a measuring machine, characterized in that it includes a speed variable means for changing the speed. (2. In claim 1, the joystick is configured to output an analog signal according to the tilt angle of the operating rod, and the mode identification means outputs the analog signal from the joystick for each predetermined level range. The speed variable means is a pulse oscillator whose oscillation frequency is varied according to the mode signal given from the window comparator. . A driving device for a measuring instrument, characterized in that the driving section includes a pulse motor and a driver circuit that drives the pulse motor at a speed according to the number of pulses given by the pulse oscillator. (3) In claim 2, the driver circuit is configured to be driven on the condition that the operating lever or a start switch provided in the vicinity of the operating lever is operated. (4) Range of lfj#!F In any one of paragraphs 1 to 3, the mode identification means shall include a dead zone between each of the modes. A driving device for a measuring machine characterized by: (5) In any one of claims 1 to 4, the speed variable means is configured to change the mode identification means as the tilt angle of the operating rod of the joystick increases. 1. A drive device for a measuring instrument, characterized in that the drive unit is configured to switch speeds of the drive unit in the order of inching, low speed, medium speed, and high speed according to mode signals sequentially output from the drive unit.