Boots – shoes – and leggings
Patent
1985-02-26
1986-05-06
Ruggiero, Joseph
Boots, shoes, and leggings
364132, 364474, G06F 1546, G06F 1516
Patent
active
045876070
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to a numerical control device which is capable of controlling a machine tool having a large number of controlled axes, or a machine tool having two heads, by providing a plurality of standard numerical control devices each having data and numerical control processing capability using the arithmetic functions of their processors, one of the devices being a master device and the others being slave devices, and by connecting the master device to the slave devices through coupling circuits having a data exchange capability.
The numerical control of a machine tool which is required to be controlled in a complex manner, such as a machine tool having a large number of controlled axes or a lathe having two heads, is difficult to realize with a standard, mass-produced numerical control device because of its limited processing capability. Such control requires the use of a special-purpose numerical control device designed for a higher processing capability. The conventional special-purpose numerical control device of this kind, however, is designed and developed apart from standard numerical control devices and includes its own unique hardware and software. Production capacity therefore is small in scale so that the unit cost per device is quite high. Another disadvantage is that considerable time is required for delivery.
SUMMARY OF THE INVENTION
The present invention seeks to improve upon the disadvantages encountered in the prior art. An object of the present invention is to make possible a reduction in the price of the heretofore costly numerical control device of the aforementioned kind, as well as a reduction in the time needed for delivery, by utilizing standard, mass-produced numerical control devices to realize a special-purpose numerical control device which is capable of executing complex control operations or control of a large number of axes.
Specifically, in the present invention, a plurality of standard numerical control devices having a data processing capability using the arithmetic functions of their processors, are interconnected through coupling circuits which have a data exchange capability. With one of the numerical control devices serving as the master and the other numerical control devices serving as the slaves, a single machine tool is numerically controlled by the plurality of numerical control devices under the overall control of the master device. Thus, with the exception of the coupling circuits, the circuitry of the already mass-produced standard numerical control devices can be utilized intact, enabling a special-purpose numerical control device, which is capable of executing complex control operations or control of a large number of axes, to be provided at a low price and within a short delivery time.
BRIEF DESCRIPTION OF THE DRAWINGS
FIGS. 1 and 2 are block diagrams of the principal portions of different embodiments according to the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The present invention will now be described in greater detail in conjunction with the accompanying drawings.
FIG. 1 is a block diagram of the principal portions of a numerical control device or unit embodying the present invention, in which numerals 10a and 10b denote standard numerical control devices and 11a, 11b denote main processors and 12a, 12b denote buses, 14a and 14b denote coupling circuits, and 15a, 15b, 16a and 16b denote axis control circuits. WK represents a workpiece, and CT.sub.1 and CT.sub.2 represent cutters. Each coupling circuit 14a and 14b includes a driver D for transmission and a receiver R for reception, these being capable of providing an electrical connection to the buses 12a and 12b.
In FIG. 1, the standard numerical control device 10a is capable of carrying out ordinary numerical control independently by using the arithmetic functions of its main processor 11a to process an execution program and data stored in main memory 13a. Likewise, the numerical control device 10b also is capable of carrying out ordinar
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Fanuc Ltd.
Ruggiero Joseph
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