Electricity: motive power systems – Positional servo systems – Program- or pattern-controlled systems
Patent
1990-07-10
1992-08-18
Ip, Paul
Electricity: motive power systems
Positional servo systems
Program- or pattern-controlled systems
318569, 318572, 36447427, 364400, G05B 1918
Patent
active
051402378
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a computerized numerical control (CNC) method of controlling a plurality of paths with a single computerized numerical control apparatus, and more particularly to a CNC method of sequentially executing part programs for respective paths.
2. Description of the Related Art
There has recently been used a multipath control method which controls a plurality of paths with a single computerized numerical control (CNC) apparatus in order that the CNC apparatus can operate with more functions and a workpiece can be machined in a shorter period of time.
In computerized numerical control apparatus controlled by the multipath control method, part programs for respective paths are generally executed simultaneously, i.e., parallel to each other.
It is however difficult or even practically impossible to check the part programs which are executed parallel to each other.
SUMMARY OF THE INVENTION
In view of the aforesaid problems of the conventional CNC method, it is an object of the present invention to provide a CNC method which can sequentially execute part programs for respective paths.
To achieve the above object, there is provided in accordance with the present invention a CNC method of controlling a plurality of paths with a single computerized numerical control apparatus, the method comprising the steps of designating an order in which to execute part programs for the respective paths, and sequentially executing the part programs for the respective paths in the designated order.
The part programs for the respective paths are designated in a certain order in which they are to be executed. The part programs are then executed in the designated order, and contents thereof are checked for each of the part programs.
If necessary an actual order may be modified.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a view showing a display screen used in a CNC method according to the present invention;
FIG. 2 is a flowchart of a sequence of the CNC method of the present invention; and
FIG. 3 is a block diagram of the hardware of a computerized numerical control apparatus for multipath control according to the present invention .
DESCRIPTION OF THE PREFERRED EMBODIMENT
An embodiment of the present invention will hereinafter be described with reference to the drawings.
FIG. 1 shows a display screen used in a CNC method according to the present invention. A CRT/MDI unit has a display screen 1 which includes a multipath setting display area 2, and a selection display area 3 for selecting a parallel execution mode or a sequential execution mode. In FIG. 1, a parallel execution mode is selected, and the selection of the parallel execution mode is indicated by an underline which is displayed.
In a normal machining process, part programs for respective paths are executed simultaneously parallel to each other to machine a plurality of workpieces at the same time. At times, one workpiece may be machined simultaneously by a number of machining heads and corresponding part programs. If the part programs were executed as they are, the part programs would be simultaneously executed, and any checking of these part programs would be practically impossible to carry out.
According to the present invention, a selection capability is provided which allows the part programs for respective paths to be sequentially executed. The selection capability displays a path number section 4 for displaying path numbers, a program number section 5 for displaying the part programs for the paths, such as Oaaaa, Obbbb, Occcc, and so on, and a sequence number section 6 for setting an order in which to execute the part programs.
In the selection display area 3, a sequential execution mode is selected, and an order in which to execute the part programs is preset in the sequence number section 6. According to the preset order, a computerized numerical control apparatus does not execute the part programs parallel to each other, but executes the part programs in the order set in
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Fujibayashi Kentaro
Sasaki Takao
Yasuda Ken
Fanuc Ltd.
Ip Paul
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