JPS6010861B2 - Diagonal tracing control device - Google Patents

Description

[Detailed Description of the Invention] The present invention provides a so-called single-cut tracing control device that moves a model and a stylus relatively in a fixed feeding direction and performs tracing in a direction perpendicular to the feeding direction. The present invention relates to a diagonal line scanning control device that makes it possible to make the pattern diagonal with respect to the above-mentioned constant feeding direction.

Figures 1 and 2 show conventional single-side engraving copying devices of this type.
As shown in the figure, the stylus 12 is moved in the x direction with respect to the model 11, and the displacement of the stylus 12 at that time is detected as an X direction component, a Y direction component, and a Z direction component, and the stylus 12 is By controlling the x-direction speed and Z-direction speed of the model and stylus so that the displacement is constant, the shape of the model 11 in the Z direction is imitated.

In general, by placing a workpiece corresponding to the model 11 and a cutting tool corresponding to the stylus 12 in the same relationship as these, and by performing similar control, the workpiece is shaped into the shape of the model 11. It can be processed into

In such a copying control device, the feeding direction is fixed to be the If you want to set the direction with a certain angle Q to the X-axis as the feeding direction, it is necessary to set the model and work so that the direction of the angle Q coincides with the X-axis. It takes time to operate.

Therefore, it would be extremely convenient if, once set, it could be fed in a direction at an angle Q with respect to the predetermined feeding direction x, and then be traced in the Z direction including the direction Q. Conventionally, such tracing is called diagonal tracing, and for example, a method as shown in Tsubaki Publication No. 53-21548 has been proposed.

This method uses the feed control speed signal Vx in the
This is used as a direction feed control signal. Therefore, according to this method, the feeding direction can only be changed in the direction of Q=45o with respect to the x direction and the Y direction.

Furthermore, in this case, the feed speed in the x direction and the Y direction, that is, the speed in the feed direction of Q=45o is equal to the set speed. For this reason, the speed at which the stylus moves on the surface of the model is not constant, resulting in poor tracing accuracy. An object of the present invention is to provide a diagonal scanning control device that can set the feeding direction in any direction, and that can perform scanning with high accuracy by keeping the surface speed constant, that is, equal to the set speed. It is something.

According to this invention, the angle Q
If you set
A signal such as ' = ycosQ - goxsinQ
′ and y′ are obtained.

These values x' and y' may be calculated by an arithmetic circuit from the displacement values x and y in each direction obtained from a stylus displacement detector, so-called tracer head, and the set angle Q, or they may be calculated by a calculation circuit from the set angle Q. By rotating the mounting angle of the head by an amount Q with respect to its center, x' and y' may be taken out from the head itself. Thank you for this x'
, y′ of the conventional control signal calculation circuit.
are supplied to respective input terminals to perform calculations similar to those of a conventional copying control device.

c for the × direction speed control signal Vx from the arithmetic circuit.
osQ is registered, and its output controls the relative speed of the model and stylus in the x direction. Further, the x-direction velocity signal Vx is multiplied by sinQ, and the relative velocity of the model and stylus in the Y-direction is controlled by the output thereof. In this way, it is possible to use the conventional speed control signal calculation circuit for half-cut copying as is, and set the feed direction in any direction within the X and Y planes with high precision by adding only a small amount of circuitry. I can do it. For example, as shown in FIG.
For example, the x-direction component x of the displacement of the stylus 12 from the tracer head is detected from the terminal 14, the Y-direction component zy from the terminal 15, and the Z-direction component zz from the terminal 16.

In conventional single-cut copying, the displacement signals gox, goy, goz are directly supplied to the terminals 18, 19, and 2 of the control signal calculation circuit 17, respectively.
X direction speed control signals Vx and Z are sent to the output terminals 21 and 22 of
Direction and 0-direction speed control signals Vz are obtained, respectively. These control the feed speeds of the model and stylus in the x direction and the z direction, respectively. In this embodiment, a signal conversion circuit 23 is provided before the control signal calculation circuit 19. Letting Q be the feeding direction to be changed, that is, the angle with respect to the x direction, the cosQ signal is
A signal of sinQ is generated from the circuit 25. The signal of sinQ is supplied to multiplication circuits 26 and 27, respectively, and is multiplied by the signals from terminals 14 and 15, x and 0, respectively. The sinQ signal from circuit 25 is also supplied to circuits 28 and 29, where it is multiplied by the signals x and y, respectively. The outputs of the multiplication circuits 26 and 29 are added in an addition circuit 31 and sent to input terminal 1 of the control calculation circuit 17.
The outputs of the multiplication circuits 27 and 28 are supplied to the subtraction circuit 32, the output of which is supplied to the terminal 19, and the signal z from the terminal 16 is supplied to the terminal 20 as is.
In other words, the signal x' input to terminal 18 is x' = x
cosQ + scale mQ '1},
Also, the signal y′ supplied to terminal 19 is ′・■
Goy: GoyC〇SQ-doXSmQ.

These x' and y' are the x-axis (this is called the X'-axis) and the Y-axis (this is the Y'-axis) when the This shows the displacement component of the stylus with respect to That is, as shown in FIG. 4, when the stylus is displaced in the angular direction with respect to the x axis with respect to the intersection point 0 of the x direction and the Y direction, the Gox=gocos8 is detected, and the Y direction component goy=gosino is detected from the terminal 15. When the X and Y axes are rotated in the Y plane by an angle with respect to the Y direction, which component of the displacement with respect to those axes
1Q) =Go(COS8COSQ10Sin8SinQ) (
31doy=GoSin(8-Q)=Go(Sin8COSQ
-C.

68SinQ) (It becomes 41.

By substituting the above relationships of x and y into these expressions '3} and {4), the relationships of expressions m and {2} can be obtained. In other words, the output of the conversion circuit 23 is a displacement signal x for each component in the X' and Y directions when the X and Y axes are rotated by an angle Q.
It is understood that ``and y'' have been converted into ``gox' and ``goy''. Therefore, if these Zx and y' are supplied as they are to the conventional control signal calculation circuit 17, the terminal 21
A speed control signal Vx' in the X' direction is obtained from.
Therefore, when this is decomposed into components in the x and Y directions, the component in the x direction becomes Vx = Vx'cosQ, as shown in Figure 5.
The component in the Y direction Z is Vy=Vx'sinQ. As shown in FIG. 3, the output Vx' of the terminal 21 is multiplied by cosQ from the terminal 34 in the multiplication circuit 33, and this output Vx=Vx
'cosQ is obtained at terminal 35.

Also, Vx' from the terminal 21 and sinQ from the terminal 37 are supplied to the multiplication circuit 36, and Vy=Vx'sinQ is output from the terminal 38.
supplied to The speeds of the model and stylus are controlled in the x direction and the y direction by the outputs of these terminals 35 and 38, respectively. Therefore, the relative feeding direction of the stylus and model is a direction inclined by Q with respect to the X axis. The speed control signal Vz from the terminal 22 is directly applied as a Z-direction speed control signal as in the conventional case. In this way, according to the copying control device according to the present invention, the speed direction can be set at Q with respect to the X direction, and the direction can be changed by feeding in any direction Q, and the set speed remains the same without changing. Therefore, the surface velocity of the stylus model 11 is kept constant, so that highly accurate tracing can be performed.

Moreover, in FIG. 3, it is simply the conversion circuit 23 and the chicken calculation circuit 3.
3 and 36 may be added to the conventional one. Q=
In the case of 450, {1-type and ■type are respectively Buddha'=support tenry) (5)~'=direction-shin (6) respectively.

Therefore, as shown in FIG.
From 1, 'x' and 'y' from terminals 14 and l5 are added and the resulting signal is outputted and supplied to terminal 18, and 'x' and 'y' from terminals 14 and 15 are supplied to circuit 42. -Thank you
All you have to do is subtract the number and display it vertically on the side of the lion. Also terminal 2
The speed control signal Vx' from 1 may be lowered in the circuit 43, and the output thereof may be supplied to the terminals 35 and 38 to be used as each speed control signal in the X direction and the Y direction, and its configuration is extremely simple. Become. If the conversion circuit 23 has a plurality of predetermined angles in the feeding direction Q, Q2, . . . The gain or attenuation of CosQ, -cosQn is controlled by supplying circuits 1, .about.ln, respectively.

In addition, the signal x is supplied to the level conversion circuits 2, to 2n, and
The levels are converted to sq, ~coson, respectively.
The signal y from the terminal 15 is supplied to the level conversion circuits 3, .about.3n and converted to a level corresponding to cosQ, .about.cosQn, and the signal y is similarly supplied to the level conversion circuits 4, .about.4n, respectively, to have a level corresponding to sinQ. , ~sinQM are converted to the corresponding level. These are switches S, which select the outputs of the level conversion circuits 1, ~ln, and level conversion circuits 2, ~2n.
switch S2, level conversion circuit 3, to select the output of
Switch S3 for selecting the output of 3n, level conversion circuit 4
, ~4n is provided, and these switches S and ~S4 are interlocked to simultaneously switch the outputs of the level conversion circuit according to the setting of the angle Q.
If both outputs of S4 are added by an adder circuit 31 and supplied to the terminal 18, and each output of the switch S2 and switch S3 is supplied to the subtraction circuit 32 and the output is supplied to the terminal 19, the terminals 18 and 19 are ′ and y′ are obtained, respectively. In this way, it can be easily constructed using attenuators and amplifiers without providing a multiplication circuit. Furthermore, the signals x' and y' can be obtained not only by calculation but also easily from the tracer head itself.

That is, as shown in FIG. 8A, the tracer head 13 is provided with a cover moving transformer 44 for detecting the x direction in a cylindrical case so that the moving direction of the magnetic core coincides with the x direction.
A differential transformer 45 is provided such that the moving direction of its magnetic core coincides with the Y direction. The case of the tracer head 13 is generally cylindrical, and the center of the case is in the Z direction.
The case is located within the ring-shaped support ``its axis, i.e., Z.''
It is installed so that it can rotate around the axis. Therefore, as shown in FIG. 8B, if the case of the tracer head 13 is rotated with respect to the support ring by an amount Q in the x direction around its axis D, the power x' will be released from the differential transformer 44 in the x direction. , and y' are obtained from the differential transformer 45 in the Y direction.

The outputs from the differential transformers 44 and 45 rotated in this manner may be directly supplied to the control signal calculation circuit 17. As described above, according to the diagonal line scanning control device according to the present invention, it is possible to easily change the angle of the scanning direction with respect to a fixed direction, and moreover, keeping the surface speed constant at the set speed allows highly accurate scanning. be able to.

[Brief explanation of the drawing]

Figure 1 is a diagram showing the relationship between the model and stylus feeding direction FIG. 3 is a block diagram showing an example of a diagonal tracing control device according to the present invention, FIG. 4 is a diagram showing the relationship between the lines x' and y', and FIG. 5 is a diagram showing the relationship between Vx', Vx, and Vy. FIG. 6 is a block diagram showing another example of the scanning control device according to the present invention, FIG. 7 is a block diagram showing another example of the signal conversion circuit, and FIG. ′, and y′. 13: Detector, 14: X output terminal, 15: Y output terminal, 16: Z output terminal, 17: Control signal calculation circuit, 1
8: X component input terminal, 19: Y direction input terminal, 20: Z
Direction input terminal, 21: × direction speed control signal output terminal, 2
2: Z direction speed control output terminal, 23: Conversion circuit, 24:
cos signal generation circuit, 25: sinQ generation circuit, 26~
29, 33, 36: Multiplication circuit, 1, ~ln, 2・~2n
, 31-3n, 4.--4n: level conversion circuit. Figure 1 History Figure 2 Admiring Figure 4 Figure 5 Tsutomu 6 Figure 8 Figure 7

Claims (1)

[Claims] 1. The model and stylus are moved relative to each other in the feed axis X direction, and the displacement of the stylus is expressed as the feed axis direction component εx,
A component εz in the scanning axis Z direction perpendicular to this, and a component εz in the X direction and Z direction.
The X direction speed control signal Vx and the Z direction speed control signal Vz are detected from these components εx, εz, εy so that the displacement of the stylus is always a constant value. In a copying device, the relative speeds of the model and the stylus in the X direction and the Z direction are controlled by these control signals, which are calculated by a control signal calculation circuit, respectively. a feeding direction setting means for setting the angle α with respect to the X direction; and a feeding direction setting means for setting the angle α with respect to the
Means for supplying input terminals for x and εy, respectively, and an X-direction speed control signal output V from the control signal calculation circuit.
a circuit that multiplies x by cos α and supplies the result to the X-direction speed control means; and a circuit that multiplies the X-direction speed control signal output Vx by sin α and supplies the result to the Y-direction speed control means for the model and stylus. Diagonal tracing control device.