JPH0673085B2 - Switching method of storage floppy when outputting digitized data - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a storage floppy switching method for storing digitized data obtained by digitizing a machining model.

(Technical background of the invention and its problems) The operation speed of NC (numerical control) device of a machine for machining dies has been remarkably improved recently, and for example, for a 3D point cloud command at 1 mm intervals, a few m / min. It has become possible to achieve the cutting speed of. Therefore, when the digitized data is sampled following the machining model, the tolerance amount and pick feed amount are made smaller than in the past to try to obtain more faithful model shape data. The amount has increased dramatically. Also, a large amount of digitizing data is generated even when the digitizer is driven unattended for a long time. However, since this large amount of digitized data cannot be stored on one floppy disk,
How to store data over multiple floppies
Volume output method) has come to be adopted.

As described above, in the case where the digitized data is stored over a plurality of floppies, the conventional procedure has been as shown in FIG. That is, when the remaining capacity of the output floppy currently used falls below a certain amount (step S1
0), immediately stop and stop the machine (step S
11). After confirming that the machine has stopped completely, the storage floppy that is currently in use is closed, and after the operator completes the floppy replacement work (step S12),
By pressing the digitize restart button, the temporary stop is released after the floppy opening process, and the movement of the machine is restarted (step S13).

As described above, in the conventional switching method, the copying operation is immediately stopped by the temporary stop, so that the floppy can be switched in the middle of the copying step in some cases as shown in FIG. 4, and NC using this digitized data is used. It adversely affects processing. That is, a cutter mark is generated when the floppy disks are switched, and smooth processing cannot be performed. The solid line in Fig. 4 shows the cutter path of the digitized data in the case of surface reciprocating copying. The remaining capacity of the floppy disk becomes less than a certain amount at the point x, and the cutter mark is generated at the point ○ by switching the floppy disks. It indicates that In order to eliminate the cutter mark generated when switching the floppy disk, a method of inserting a relief and return program in the Z-axis direction by an insertion program when the floppy disk is closed or opened is adopted.
The cutter mark could not be completely removed using this method.

(Object of the Invention) The present invention has been made under the circumstances as described above, and an object of the present invention is to switch a floppy disk at an end point of a copying step or a changing point of a copying sequence such as before and after pick feed. An object of the present invention is to provide a method of switching the storage floppy at the time of outputting digitized data so that the NC processing can be performed smoothly.

(Summary of the Invention) The present invention relates to a method of switching a storage floppy at the time of outputting digitized data when storing digitized data obtained by copying a model in a floppy disk. The copying operation is automatically stopped at the end point of the copying step or before and after the pick feed, and the copying operation is restarted after the operator changes the proppy to continue data storage.

(Embodiment of the Invention) FIG. 1 shows the configuration of a digitizing device to which the present invention is applied. The mechanical part 10 is a tracer head that detects the displacement of the stylus.
12 and a drive motor 13 for moving the tracer head 12.
And the like, and a position detector 14 that detects the position of the tracer head 12 for each of the XYZ axes.

Further, the scanning control unit 20 includes a displacement amount position reading unit 21 for reading the displacement amount detected by the tracer head 12 and the tracer head position detected by the position detector 14, and an approach based on the displacement amount, Z-axis one-dimensional. Copying, a copying control calculation unit 22 for controlling individual movements of copying such as two-dimensional copying on a designated half surface,
A drive motor control unit 23 that performs servo control of the XYZ three axes and a scanning sequence control unit 24 that performs sequence control of each scanning cycle such as surface reciprocating scanning and contour portion scanning. A copying mode command LM is input to the copying control sequence control unit 24.

Furthermore, the digitizing control unit 30 includes a position displacement amount capturing unit 31 that captures the position of the tracer head 12 detected by the position detector 14 and the displacement amount detected by the tracer head 12 at regular intervals.
And a data processing unit 32 that performs digitizing point detection processing such as tolerance processing, a data output unit 33 that converts the digitized point coordinate values and displacement amount to the NC program format, and outputs and stores them on a floppy disk, and a floppy disk. Is composed of a remaining capacity detecting section 34 that constantly checks the remaining capacity to be stored, and a copying sequence stepping / stopping signal generating section 35 that outputs a scanning sequence stepping / stopping signal LCS in accordance with a signal from the remaining capacity detecting section 34. It

In the conventional floppy switching method described above, when the remaining capacity of the floppy becomes less than a certain amount, the remaining capacity detection unit 34
Is detected, the sequence temporary stop signal is sent to the copying control calculation unit 22 via the copying control sequence control unit 24, and the copying control calculation unit 22 immediately stops the machine by setting the copying speed to zero. That is, in the prior art, there is no copy sequence step / stop signal generator 35 in FIG.

On the other hand, in the present invention, the floppy switching is performed as follows. This will be described with reference to the flowchart of FIG.

The remaining capacity detection unit 34 detects that the remaining capacity is equal to or less than a certain amount (step S1), and the scanning control sequence control unit 24
When the scanning sequence step / stop signal LCS is received, when the specific scanning sequence step (for example, the scanning step) is completed (step S2), the stepping of the scanning sequence counter to the next scanning sequence step is stopped. , Causes the digitizing control unit 30 to close the storage floppy currently being used.

The operator confirms that the closing process of the stored floppy is completed (for example, the lamp is lit), replaces the floppy with a new one, and presses the floppy exchange completion button or the like (step S3). The digitizing control unit 30 waits for the completion of the opening process of the new storage floppy that has been exchanged, advances the copying sequence counter by the copying control sequence control unit 24 (step S4), and thereafter performs the normal copying sequence control (step S4). S5).

By repeating the above, the floppy switching process is always executed at the end position ◯ of the specific copying sequence step (for example, the copying step) as shown in FIG. 2, so that even if data is stored over a plurality of floppies. , It is possible to obtain smooth digitized data without a cutter mark in the copying step. In addition, the point x in FIG. 2 indicates the position when the remaining capacity of the floppy disk is below a certain amount.

(Effects of the Invention) As described above, according to the storage floppy switching method of the present invention, the floppy is not switched during the copying step, and digitized data over a plurality of floppies suitable for NC processing can be obtained. it can. That is, the cutter mark generated by stopping the machine for floppy switching processing during NC processing can be driven to the peripheral portion of the model.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an example of an apparatus for implementing the method of the present invention, FIG. 2 is a view showing the principle of the present invention, FIG. 3 is a flow chart showing an example of its operation, and FIG. FIG. 5 is a diagram for explaining the conventional floppy switching, and FIG. 5 is a flowchart showing the conventional switching method. 10 …… Machine part, 11 …… Model, 12 …… Tracer head,
13 ... Drive motor, 14 ... Position detector, 20 ... Copy control unit, 21 ... Displacement amount position reading unit, 22 ... Copy control calculation unit,
23 ... Drive motor control unit, 24 ... Copy control sequence control unit, 30 ... Digitizing control unit, 31 ... Position displacement amount capturing unit, 32 ... Data processing unit, 33 ... Data output unit, 34 ... …
Remaining capacity detector, 35 ... Copy sequence step / stop signal generator.

Claims (1)

[Claims] 1. When storing digitized data obtained by following a model in a floppy disk, it is detected that the remaining storage capacity is below a predetermined amount, and the copying operation is automatically stopped at the end point of the copying step or before and after pick feed. Then, after the operator switches the floppy disk, the copying operation is restarted to continue data storage, and the stored floppy disk switching method at the time of outputting digitized data.