Boots – shoes – and leggings
Patent
1991-08-19
1992-09-08
Ruggiero, Joseph
Boots, shoes, and leggings
318573, 364136, 36447411, G05B 19403
Patent
active
051464101
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATION
This application is related to copending U.S. patent application having U.S. Ser. No. 07/391,562 that is assigned to the same assignee as the present application now abandoned.
1. Technical Field
The present invention relates to a computerized numerical control (CNC) system for controlling the axes of a computerized numerical control apparatus from a programmable machine controller (PMC) coupled to the computerized numerical control apparatus, and more particularly to a computerized numerical control system for controlling the axes of the computerized numerical control apparatus through linear interpolation.
2. Background Art
There are widely used systems for controlling machines with computerized numerical control (CNC) apparatus to which programmable machine controllers (PMC) are coupled. The axes of a computerized numerical control apparatus are controlled from a programmable machine controller by command signals applied through a common RAM. With this arrangement, the axes of the CNC apparatus can be controlled by a user program stored in the PMC.
However, command signals from the PMC are applied respectively for the individual axes, and hence these axes of the CNC apparatus can only be controlled asynchronously. There is no information regarding the grouping of the axes, etc. Therefore, it has heretofore been unable to operate the axes of the CNC apparatus in relation to each other.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a computerized numerical control system which will solve the aforesaid problems of the conventional computerized numerical control methods, and which controls the axes of a computerized numerical control apparatus through linear interpolation with command signals from a programmable machine controller.
To solve the above problems, there is provided in accordance with the present invention a computerized numerical control system for controlling the axes of a computerized numerical control apparatus from a programmable machine controller coupled to the computerized numerical control apparatus, the computerized numerical control system comprising: means for sending command values for the axes, information with respect to the grouping of the axes, and execution times for the axes in respective groups, from the programmable machine controller to the computerized numerical control apparatus; and means for starting to distribute pulses to axes when all commands for the axes in the respective groups are received by the computerized numerical control apparatus, and for distributing the pulses within the execution times to effect linear interpolation with respect to the axes.
The axes in the groups are caused to start simultaneously moving in response to the information with respect to the grouping of the axes sent from the programmable machine controller. Furthermore, the execution times are given to the axes in the groups, and the pulses are distributed within the execution times for effecting linear interpolation with respect to the axes of the computerized numerical control apparatus.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a block diagram of a computerized numerical control system according to an embodiment of the present invention; and
FIG. 2 is a diagram illustrating the grouping of axes.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
An embodiment of the present invention will hereinafter be described with reference to the drawings.
FIG. 1 shows in block form a computerized numerical control system according to an embodiment of the present invention. A programmable machine controller (PMC) 10 is coupled to a computerized numerical control (CNC) apparatus 20 and issues command signals for controlling three axes of the CNC apparatus 20.
Moving commands are sent from the PMC 10 to axis command interfaces 31, 32, 33 through a common RAM. Command values and execution times from the PMC 10 are temporarily stored in buffers 21, 22, 23. Axis control circuits 24, 25, 26 are responsive to commands from the buffer
REFERENCES:
patent: 4489377 (1984-12-01), Mawyer et al.
patent: 4513379 (1985-04-01), Wilson et al.
patent: 4514814 (1985-04-01), Evans
patent: 4891765 (1990-01-01), Hatori et al.
Fujibayashi Kentaro
Hidaka Yosata
Kawamura Hideaki
Fanuc Limited
Ruggiero Joseph
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