Networked file operations for computer numerical controls

• US 6,470,377 B1
• Filed: 12/19/1997
• Issued: 10/22/2002
• Est. Priority Date: 12/19/1997
• Status: Expired due to Term

• Current Assignee: Allen-Bradley Company (Rockwell Automation, Inc.)
• Original Assignee: Rockwell Automation Technologies Incorporated (Rockwell Automation, Inc.)
• Inventors: Piatka, Michael, Sevcik, George J., Govindaraj, Subbian
• Primary Examiner(s): Rinehart, Mark H.
• Assistant Examiner(s): VU, THONG H
• Application Number:
  US08/994,517
• Time in Patent Office: 1,768 Days
• Field of Search: 340/825.08, 395/500, 395/187.01, 395/326, 395/616, 345/352, 364/471.03, 364/474.16, 364/474.01, 364/468.03, 700/181, 700/190.1, 717/10-15, 709/200-203
• US Class Current: 709/201
• CPC Class Codes: G05B 2219/31206 Exchange of parameters, data, programs between two station, station and central or host or remote
• CPC Class Codes: H04L 67/06 specially adapted for file transfer, e.g. file transfer protocol [FTP]
• CPC Class Codes: H04L 67/12 specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
• CPC Class Codes: H04L 67/34 involving the movement of software or configuration parameters network booting or remote initial program loading [RIPL] G06F9/4416
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

A networked system combines multiple workstations, storage devices and file handlers with multiple computer numerical controls. Typically, each workstation comprises a personal computer with a Windows-based operating system utilizing a standard process-to-process communication protocol, such as Dynamic Data Exchange (DDE). This type of system allows a wide variety of M-to-N topologies in CNC environments. Further, the use of a file management system, according to the present invention, allows the activation and execution of part program operations at a computer numerical control on files accessed through standard open networks.

Claims

1. A system for effecting file operations at a computer numerical control on files accessed at a remote location through a standard, open network, comprising:

a network;

a plurality of computer numerical controls linked to the network;

a plurality of machines, with each machine being able to undergo predetermined motions, each machine being linked to at least one computer numerical control of the plurality of computer numerical controls, wherein the at least one computer numerical control is able to control the motions of the machine to which it is linked;

a plurality of workstations linked to the network, in which any but at least one workstation of the plurality of workstations includes a file handler; and

at least one storage medium linked to the network, the at least one storage medium being configured to store a file having a machine control related program for the control of one or more of the plurality of machines, wherein the file handler is configured to selectively transfer the machine control program to the computer numerical control or to run the machine control program from its location on the at least one storage medium further wherein the file handler is connected to any of the plurality of computer numerical controls by a plurality of communication channels to permit simultaneous execution of one or more machine control programs while transferring another machine control program, wherein a part program, a part program subroutine and a macro can be executed at a given computer numerical control from either a memory of a computer numerical control or the at least one storage medium.

2. The system as recited in claim 1, wherein each workstation comprises a personal computer having a Windows-based operating system.

3. The system as recited in claim 2, wherein each workstation comprises an application program interface configured for use with the Windows-based operating system.

4. The system as recited in claim 3, wherein the application program interface comprises Dynamic Data Exchange (DDE).

5. The system as recited in claim 1, wherein each workstation includes a file handler.

6. The system as recited in claim 3, wherein each file handler is configured to support multiple computer numerical controls.

7. The system as recited in claim 4, wherein only one of the file handlers serves as a controlling file handler for a designated computer numerical control at any given time, further wherein the controlling file handler controls all file operations with respect to the designated computer numerical control until that control is relinquished by the file handler.

8. The system as recited in claim 5, wherein the at least one storage medium comprises a plurality of hard disk storage areas, further wherein each of the personal computers includes at least one of the hard disk storage areas.

9. The system as recited in claim 1, wherein each computer numerical control of the plurality of computer numerical controls includes a memory capable of storing a part program, and the at least one storage medium is capable of storing a part program subroutine, the file handler being configured to execute the part program subroutine from the at least one storage medium during execution of the part program.

10. The system as recited in claim 1, wherein the network comprises a local area network.

11. The system as recited in claim 1, wherein the network comprises an Ethernet network.

12. The system as recited in claim 1, wherein the plurality of machines comprises a plurality of machine tools.

13. A file management system for use with a plurality of networked workstations and computer numerical controls, comprising:

a file handler configured for communication with the plurality of networked workstations and computer numerical controls, the file handler including a file server and a file client, wherein the file handler is stored at a first networked computer;

at least one computer numerical control that is stored on a second networked computer remote from the first networked computer; and

a storage medium able to store a part program, a part program subroutine and a macro for use by the at least one computer numerical control in controlling machine motion, wherein the file server is configured to selectively manage transfer of the part program, part program subroutine, or macro to the at least one computer numerical control from the storage medium or to manage execution of the part program, part program subroutine, or macro from the storage medium, and the file client is configured to manage transfer of data from the at least one computer numerical control to the storage medium.

14. The file management system as recited in claim 13, wherein the file handler and the storage medium are disposed at a single workstation that may be linked to the network.

15. The file management system as recited in claim 14, wherein the storage medium comprises a hard disk drive.

16. A system for utilizing multiple types of file operations on a networked computer numerical control from a remote networked storage medium, comprising:

a workstation;

a computer numerical control having a memory for storing a file having a machine control program, wherein a machine control program includes at least one of a part program, a part program subroutine, and a macro;

an open network to which the workstation and the computer numerical control are linked, the open network being capable of carrying communications between multiple types of devices;

a storage medium disposed at a remote location on the network relative to the computer numerical control, the storage medium being configured to store a file having a motion control program for use by the computer numerical control; and

a file handler linked to the open network, wherein instructions related to movement of the file between the computer numerical control and the storage medium is input at the workstation and transferred to the file handler for implementation further wherein the file handler is connected to any of a plurality of networked computer numerical controls by a plurality of communication channels to permit simultaneous execution of one or more machine control programs while transferring another machine control program, further wherein the part program, the part program subroutine or the macro can be executed at the computer numerical control from either the memory or the storage medium.

17. The system as recited in claim 16, wherein the file handler is configured to manage execution of the motion control program over the open network at the computer numerical control when the motion control program is stored remotely in the storage medium.

18. The system as recited in claim 17, wherein the workstation comprises a personal computer having a Windows-based operating system that implements Dynamic Data Exchange (DDE) as its communication protocol for a DDE-compliant Windows application, and a data server that provides a DDE interface between the computer numerical control and the DDE-compliant Windows application, further wherein instructions related to file operations may be entered via the DDE-compliant Windows application, transferred over the open network to the computer numerical control by the data server and then sent to the file handler for implementation.

19. The system as recited in claim 18, wherein the computer numerical control includes a memory capable of storing a part program, and the storage medium is capable of storing a part program subroutine, the file handler being configured to execute the part program subroutine from the storage medium during execution of the part program.

20. The system as recited in claim 18, wherein the file handler may be connected to the computer numerical control by a plurality of communication channels to permit simultaneous execution of one or more machine control programs from the storage medium.

21. The system as recited in claim 16, wherein the file handler and the storage medium are disposed in the workstation.

22. The system as recited in claim 16, wherein the file handler is configured for use with a plurality of computer numerical controls.

23. The system as recited in claim 16, wherein the open network comprises an Ethernet network.