Electricity: motive power systems – Positional servo systems – Program- or pattern-controlled systems
Patent
1990-06-29
1992-01-21
Shoop, Jr., William M.
Electricity: motive power systems
Positional servo systems
Program- or pattern-controlled systems
3185681, 3185682, 36447423, G05B 1918
Patent
active
050830716
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a spindle control system of a numerical control apparatus, and more specifically, to a spindle control system by which spindles controlled by respective paths, or path controllers, are changed.
2. Description of the Related Art
Recent machine tools are complex machines provided with a number of independently controllable spindles, and are widely used to improve the machining efficiency and to simultaneously machine complex configurations.
In such a complex machine, an assembly of axes is controlled by a single path controller (path), which is a numerical control apparatus. Conventionally, a first path controls only a first spindle and a second path controls only a second spindle.
In conventional systems, however, since a second path cannot control a first spindle and a first path cannot control a second spindle, any improvement of the machining efficiency is limited even if a plurality of spindles are provided.
SUMMARY OF THE INVENTION
Taking the above into consideration, an object of the present invention is to provide a spindle control system by which the spindles to be controlled by respective paths can be changed.
To solve the above problem, in accordance with the present invention, there is provided a spindle control system in a numerical control apparatus capable of independently controlling a plurality of spindles by a plurality of paths, the system comprising the steps of defining connecting relationships between the paths and the respective spindles in a definition region in the NC apparatus, and changing the content of the predetermined region by a machining program, whereby the spindles to be controlled by the respective paths are changed.
The connecting relationship between the respective paths and the respective spindles is defined in the definition region of the numerical control apparatus, and the change of the content of the predetermined region effected by the machining program enables the connecting relationships between the paths and the spindles to be changed, whereby a more effective machining can be realized.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 (a) is a conceptual diagram showing the arrangement of a numerical control apparatus embodying the present invention;
FIG. 1 (b) is a conceptual diagram showing the arrangement of the numerical control apparatus of FIG. 1 (a) when the defined content thereof is changed; and
FIG. 2 is an example of a machining program executed in a spindle control system according to the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
An embodiment of the present invention will be described below with reference to drawings.
FIGS. 1 (a) and (b) are conceptual diagrams showing the arrangement of a numerical control apparatus embodying the present invention. In FIG. 1 (a), 1 designates the numerical control apparatus (CNC), 21 to 24 designate machining programs, 11 to 14 designate path controllers (path) 3 designates a definition region divided into sections 31 to 35 by which connecting relationships between paths 1 (11) to path 4 (14), and spindles to be described below, are defined: the content of S1, S2 . . . , and S5 being defined in the definition region, respectively.
The content of the definition of S1 defines the path 1 (11) to be connected to an I/O interface 41, the content of the definition S2 defines the path 2 (12) to be connected to an I/O interface 42, the content of the definition S3 defines the path 3 (13) to be connected to an I/O interface 43, and the content of SY defines the path 4 (14) to be connected to I/O interface 44; These contents are-defined by a machining program 2. Note that, in FIG. 1(a) since the content of the definition S5 does not define a path to be controlled, the spindle connected thereto is not driven.
51 to 55 denote amplifiers and designated at 61 to 65 are spindles.
FIG. 2 is an example of a machining program used in the spindle control system according to the present invention, wherein 2 designates the machinin
REFERENCES:
patent: 4963803 (1990-10-01), Kokura
Fujibayashi Kentaro
Sasaki Takao
Sato Morimasa
Bergmann Saul M.
Fanuc Ltd.
Shoop Jr. William M.
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