JPS61296412A - Dnc device - Google Patents

Abstract

PURPOSE:To inform the moving position of a machine tool to a host computer even at the failure of a numerical controller by providing the host computer interface with a position detecting interface having a function similar to that of the numerical controller side. CONSTITUTION:An output signal from a host computer 106 is inputted from a serial interface 205 in the host computer interface 102B, processed or stored in a memory 204 and outputted to the numerical controller 101 through a BTR interface 202 in accordance with the input specification of the controller 101. On the other hand, an output signal from a position detector 105 is inputted to a position detecting interface 203 and then outputted to the host computer 106 through a serial interface 205. Since the position detecting signal is directly transmitted without passing the numerical controller 101, the host computer 106 can detect the current position of the machine tool even at the failure of the numerical controller.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to a DNC (direct number system) system for operating numerically controlled machine tools using a host computer.
calaontrol) device.

[Conventional technology]

Conventionally, there have been devices of this type and those shown in Fig. 4 (-).

In the figure, in the 101i numerical control device, a host computer interface 102 installed inside or outside the device is connected to a host computer 106 through a host computer connection cable 107. Numerical control device 10
1 gives a drive command to the motor 103, and the machine tool 104,
Alternatively, the position detector 1 attached to the motor 103
The positioning control of the machine tool is performed by detecting the output signal of 05. Further, the processing commands stored or generated in the host computer 106 are once input to the host computer interface 102 through the host computer connection cable 407 and are converted into signals according to the input specifications of the numerical control device 101. The numerical control device 101 operates the machine tool 104 by driving the motor 103t while monitoring the output signal of the position detector 105 based on a machining command from the host computer 106.

[Problem that the invention seeks to solve]

Since the conventional DNC device is configured as described above,
Since the actual movement position of the machine tool blade during machining can only be monitored via the numerical control device, a function is required to notify the host computer interface of the actual movement position via the numerical control device. There is a problem in that if the numerical control device is out of order, it is not possible to know the exact position of the machine tool.

This invention was made to solve the above-mentioned problems, and it allows the host computer to determine the actual movement position of the machine tool without changing the functions of the numerical control device, and even if the numerical control device malfunctions. DN that can be notified to
The purpose is to obtain a C device.

[Means for solving problems]

The DNC device according to the present invention allows four people to input the output signal of a position detector that detects the position of a machine tool directly to a host computer interface without going through a numerical control device.
This makes it possible to transfer the input signal to the host computer.

[For production]

The host computer interface in this invention includes a position detection interface that has the same function as that of the numerical control device, so that the moving position of the machine tool can be detected independently of the numerical control device.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, the same parts as in FIG. 4 are designated by the same reference numerals.
The drive command of 04 is input to the host computer interface 102B through the host computer connection cable 107f.
Numerical control device 1 according to the input specifications of numerical control device 101
01 is input.

The numerical control device 101 rotates the motor 103 while monitoring a signal from a position detector 105 that detects the position of the machine tool 104.

The host computer interface 102B inputs the signal of the position detector 105 independently of the numerical control device 101,
The information is transferred to the host computer 106 via the host computer connection cable 107.

In addition, Figure 2 shows the host computer interface 1 in Figure 1.
02B is a configuration diagram showing an embodiment of 02B.

The output signal from the host computer 106 is input from the serial interface 205, and is sent to the CPU 201 and the memory 20.
4 is processed or stored in the numerical control device 101.
The data is output via the BTR interface 202 in accordance with the input specifications. On the other hand, the output signal from the position detector 105 is taken in by the position detection interface 203 and sent to the host computer 106 via the serial interface 20.
51N! is output.

In addition, in FIG. 3, the host computer 106 is connected to the numerical control device 101.
A management graph for comparing and monitoring the position of the data commanded by the controller and the actual position of the cutting tool of the machine tool transferred through the host computer interface 102B is shown. Here, 301 is a program trajectory of NC data sent to the numerical control device 101, and the position of the actual machine tool cutter sent from the host computer interface 102B is determined according to the allowable machine movement within the control width 302. I am monitoring whether it is correct or not.

In the above embodiment, a position detector already provided in the NC machine tool is used, but it is also possible to provide an independent position detector for monitoring the host computer.

〔Effect of the invention〕

As described above, according to the present invention, the output signal of the position detector in the NC machine tool is directly notified to the host computer without going through the numerical control device, so even if the numerical control device fails, Since the current position of the drive shaft can be notified to the host computer, it is possible to construct a highly reliable DNC system.

[Brief explanation of drawings]

FIG. 1 is a system configuration diagram of a DNC device according to an embodiment of the present invention, FIG. 2 is a detailed configuration diagram of the upper-level computer interface in FIG. 1, and FIG. 3 is the relationship between command values from the upper-level computer and management width. 4 are system configuration diagrams of a conventional DNC device. In the figure, 101 is a numerical control device, 102B is a host computer interface, and 103H is a motor. 104 is a machine tool, 105 is a position detector, 106 is a host computer, and 107 is a host computer connection cable. Figure 1 Figure 2 Figure 3 Figure 4 rM

Claims (1)

[Claims] In a DNC device that controls a machine tool by giving a program command from a host computer to a numerical control device, an output signal from a position detector provided in the machine tool is sent to a host computer interface that connects the control device and the host computer. A DNC device, characterized in that the DNC device is capable of inputting and transmitting the signal of the position detector to the host computer.