JPH04259008A - Power off system for nc device - Google Patents

Abstract

PURPOSE:To eliminate the useless power consumption by automatically turning off the power supply of an NC device when a machining process is complete. CONSTITUTION:A machining process is carried out based on a machining program (S1), and a machining program end command code is read (S2). Thus, a fact whether a power OFF command code is included in the machining program or not is decided (S3). If so, the power supply is turned off when a prescribed parameter setting time passed from the end of the machining program (S4).

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power-off method for an NC device, and more particularly to a power-off method for an NC device for turning off the power after completing a machining program.

0002

2. Description of the Related Art Conventionally, in NC devices, an operator manually turns off the power switch after completing a machining program. On the other hand, in the case of unmanned work such as at night, the power of the NC device remains on even if the machining program ends and the work stops.

0003

[Problem to be solved by the invention] However, the power consumption of the NC device is quite large even when not performing machining work, and keeping the power on for a long time is uneconomical and poses a safety problem. Ta. The present invention has been made in view of these points, and is an NC system that can prevent wasteful power consumption after finishing machining work and ensure safety.
The purpose is to provide a method for powering off the device.

0004

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a power-off method for an NC device for turning off the power after finishing a machining program, in which a power-off command code is included in the machining program. If
There is provided a power-off method for an NC device, characterized in that the power of the NC device is turned off after the machining program ends.

[0005]

[Operation] If a power off command code is included in the machining program, the power to the NC device is turned off after the machining program ends.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a schematic diagram of the hardware configuration of an interactive numerical control device for implementing the present invention. processor 1
1 controls the entire numerical control device according to a system program stored in the ROM 12. ROM12 has EPR
OM or EEPROM is used. The RAM 13 is an SRAM or the like, and stores various data or input/output signals. The nonvolatile memory 14 uses a battery-backed CMOS, and stores parameters, pitch error correction amounts, tool correction amounts, etc. that should be retained even after the power is turned off.

The graphic control circuit 15 converts the digital signal into a display signal and supplies it to the display device 16. As the display device 16, a CRT or a liquid crystal display device is used. The display device 16 displays the shape, machining conditions, generated machining program, etc. when creating the machining program in an interactive format. A machining program can be created by inputting data according to the contents displayed on the display device 16 (interactive data input screen). A figure representing the meaning of the data is displayed at the top of the screen, and the type of data to be input is displayed at the bottom. Further, the screen displays tasks or data that can be received on that screen in a menu format. Which item on the menu to select is done by pressing the soft key 16a below the menu.
The meaning of the soft key 16a changes for each screen.

The keyboard 17 includes symbolic keys, numerical keys, etc., and necessary figures and data are input using these keys. A PMC (programmable machine controller) 20 receives M function signals and the like via a bus 21, processes them using a sequence program, outputs output signals, and controls a machine tool 22. It also receives input signals from the machine side, processes them using a sequence program, and transfers the necessary input signals to the processor 11 via the bus 21.

The axis control circuit 18 receives an axis movement command from the processor 11 and outputs the axis command to the servo amplifier 19. The servo amplifier 19 receives this movement command and drives the servo motor of the machine tool 22. These components are coupled together by a bus 21. Each device of the numerical control device is connected to a power supply device 23. The power supply device 23 converts a three-phase voltage of 200V into a plurality of DC voltages such as 5V, 24V, and 100V, and supplies voltages suitable for each device.

[0010] If the machining processor includes a power off command code, the processor 11 supplies a power off command signal to the PMC 20 at the end of the machining program. Upon receiving this command signal, the PMC 20 supplies a power supply stop signal to the power supply device 23, thereby stopping the supply of power from the power supply device 23 to each device. Here, the power off command is issued using a G code or an M code. The power off command code is registered at the beginning of the machining program.

[0011] Furthermore, the set time from the end of the machining program until the power is turned off is set as a parameter in advance by the operator. This is done using softkey 16a. The set time is set to a short time so that the power is turned off immediately after the machining program ends, for example, when unmanned work is performed at night. On the other hand, when workers temporarily leave the workplace, such as during breaks,
It will be set for about 10 to 40 minutes. If the worker returns within the set time, the power off command is canceled by pressing a start button (not shown) and the machining operation continues. Note that even if a power off command code is included in the machining program, the power will not be turned off unless parameters are set.

FIG. 1 is a flowchart showing the procedure for powering off the numerical control device of the present invention. In the figure, S
The number following indicates the step number. [S1] Load a machining program and perform machining work according to its contents. [S2] Read the machining program end command code at the end of the machining program. [S3] It is determined whether or not a power off command code is included in the machining program. If there is, the process proceeds to S4; if not, this flowchart is ended. [S4] Turn off the power after the set time has elapsed from the end of the machining program.

[0013] In this way, by turning off the power of the entire numerical control device after the machining program ends, unnecessary power consumption can be eliminated. In addition, by making it possible to set parameters for the set time from the end of the machining program until the power is turned off, the power will be turned off even if the machining program ends when the worker temporarily leaves the workplace, such as during a break. You can prevent this from happening. In this case, you can continue the work simply by pressing the start button, which saves you the trouble of initial settings.

[0014]

[Effects of the Invention] As explained above, in the present invention, when a power off command code is included in a machining program,
Since the power of the NC device is turned off after the machining program is finished, it is possible to prevent wasteful power consumption after the machining operation is completed and to ensure safety.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing the procedure of a power-off method of a numerical control device according to the present invention.

FIG. 2 is a schematic diagram of the hardware configuration of an interactive numerical control device for implementing the present invention.

[Explanation of symbols]

11 Processor 12 ROM 13 RAM 14 Non-volatile memory 15 Graphic control circuit 16 Display device 16a Soft key 17 Keyboard 18 Axis control circuit 19 Servo amplifier 20 PMC 21 Bus 22 Machine tools 23 Power supply device

Claims (5)

[Claims] 1. In a power-off method for an NC device for turning off the power after the machining program ends, if the machining program includes a power-off command code, the NC device is turned off after the machining program ends. A power-off method for an NC device characterized by turning off the power. 2. The power-off method for an NC device according to claim 1, wherein the power to the NC device is turned off after a set time has elapsed from the end of the machining program. 3. The power-off method for an NC device according to claim 2, wherein the set time is set by a parameter. 4. The NC device power-off method according to claim 2, wherein when a stop command signal for stopping the power-off is input within the set time, the power-off is stopped. . 5. The power-off method for an NC device according to claim 4, wherein the stop command signal is a start signal from a start button of the NC device.