CA2458884A1 - Method and system for automated software control of waterjet orientation parameters - Google Patents

Method and system for automated software control of waterjet orientation parameters Download PDF

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Publication number
CA2458884A1
CA2458884A1 CA 2458884 CA2458884A CA2458884A1 CA 2458884 A1 CA2458884 A1 CA 2458884A1 CA 2458884 CA2458884 CA 2458884 CA 2458884 A CA2458884 A CA 2458884A CA 2458884 A1 CA2458884 A1 CA 2458884A1
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Prior art keywords
values
orientation
cutting head
computer
readable memory
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CA 2458884
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French (fr)
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CA2458884C (en
Inventor
Glenn A. Erichsen
Jiannan Zhou
Mira K. Sahney
Michael Knaupp
Charles D. Burnham
Mohamed A. Hashish
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Flow International Corp
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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/4097—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by using design data to control NC machines, e.g. CAD/CAM
    • G05B19/4099—Surface or curve machining, making 3D objects, e.g. desktop manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/04—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass
    • B24C1/045—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass for cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B26F3/004—Severing by means other than cutting; Apparatus therefor by means of a fluid jet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/45—Nc applications
    • G05B2219/45036—Waterjet cutting
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/49—Nc machine tool, till multiple
    • G05B2219/49012—Remove material by laser beam, air, water jet to form 3-D object
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/141—With means to monitor and control operation [e.g., self-regulating means]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/364—By fluid blast and/or suction

Abstract

Methods and systems for automating the control of fluid jet orientation parameters are provided. Example embodiments provide a Dynamic Waterjet Control System (401) (a "DWCS") to dynamically control the orientation of the jet relative to the material being cut as a function of speed and other process parameters. Orientation parameters include, for example, the x-y position of the jet along the cutting path, as well as three dimensional orientation parameters of the jet, such as standoff compensation values and taper and lead angles of the cutting head. In one embodiment, the DWCS (401) uses a set of predictive models to determine these orientation parameters. The DWCS (401) preferably comprises a motion program generator / kernel (402), a user interface (403), one or more replaceable orientation and process models, and a communications interface to a fluid jet apparatus controller. Optionally the DWCS also includes a CAD module (404) for designing the target piece.

Claims (123)

1. A method in a computer system for automatically and dynamically controlling orientation of a cutting head of a fluid jet apparatus relative to a material being cut, to produce a target piece having a geometry with a plurality of geometric entities, the fluid jet apparatus having a plurality of process parameters, comprising:
receiving an indication of a speed for each of the plurality of geometric entities of the geometry, wherein at least two geometric entities are associated with different speeds;
automatically and dynamically determining an orientation parameter for each geometric entity in accordance with the indicated speed and the plurality of process parameters; and automatically controlling the motion of cutting head in accordance with the automatically determined orientation parameter to cut the material to produce the target piece.
2. The method of claim 1 wherein the at least two entities associated with different speeds are ordered successively such that the two different speeds indicate one of an acceleration and a deceleration.
3. The method of claim 2 wherein the orientation parameters for each of the two successive entities are different.
4. The method of claim 2 wherein the orientation parameters for each of the two successive entities are the same.
5. The method of claim 1 wherein the orientation parameter comprises a taper angle.
6. The method of claim 1 wherein the orientation parameter comprises a lead angle.
7. The method of claim 1 further comprising:
automatically determining a second orientation parameter for each determined speed in accordance with the determined speed and the plurality of process parameters; and controlling the motion of cutting head in accordance with both automatically determined orientation parameters.
8. The method of claim 7 wherein the determined first and second orientation parameters comprise a lead angle and a taper angle.
9. The method of claim 1 wherein the automatically controlling the motion of the cutting head further comprises:
generating a motion program that indicates the automatically determined orientation parameter for each geometric entity; and forwarding the motion program to a controller of the cutting head; and causing the controller to execute the motion program.
10. The method of claim 9 wherein the motion program is tailored to the cutting head controller.
11. The method of claim 9 wherein the motion program comprises a plurality of command sequences with an x-y location and at least one of a taper angle compensation value and a lead angle compensation value, so that corrections to the target cut are made transparent to an operator of the jet apparatus.
12. The method of claim 9 wherein the motion program comprises a plurality of command sequences that indicate inverse kinematics to control the cutting head according to an x-y location and at least one of a taper angle and a lead angle, in a manner that is transparent to an operator of the jet apparatus.
13. The method of claim 1 wherein a predictive model of a cut based upon changing one of a lead angle and a taper angle is used by the computer system to automatically determine the orientation parameter for each determined speed.
14. The method of claim 13 wherein the predictive model indicates values for at least one of lead angles and taper angles as a function of values of speed.
15. The method of claim 14 wherein the function of speed is further defined as a function of one of the process parameters.
16. The method of claim 15 wherein the process parameter is at least one of abrasive fluid flow rate, nozzle orifice diameter, mixing tube characteristics, abrasive fluid pressure, material thickness, and material type.
17. The method of claim 13 wherein the predictive model indicates values for at least one of lead angles and taper angles as a function of values of acceleration.
18. The method of claim 13 wherein the predictive model indicates values for at least one of lead angles and taper angles as a function of values of deceleration.
19. The method of claim 13 wherein the predictive model indicates values for lead angles and taper angles as a function of values of speed.
20. The method of claim 13 wherein the predictive model data is stored in a dynamically modifiable library of code.
21. The method of claim 13 wherein the predictive model is represented as a polynomial equation.
22. The method of claim 13 wherein the predictive model is based upon a lookup table of discrete values.
23. The method of claim 1 wherein the cutting head is controlled by motion around at least 4 axes.
24. The method of claim 23 wherein the axes provide tilt and swivel movement of the cutting head relative to the target piece.
25. The method of claim 1 wherein the cutting head is controlled by motion around at least 5 axes.
26. The method of claim 25 wherein the axes provide tilt and swivel movement of the cutting head relative to the target piece.
27. The method of claim 1 wherein the fluid jet apparatus is an abrasive water jet.
28. The method of claim 1 wherein the fluid jet apparatus is a high pressure fluid jet.
29. A computer-readable memory medium containing instructions that control a computer processor to control orientation of a cutting head of a fluid jet apparatus relative to a material being cut, to produce a target piece having a geometry with a plurality of geometric entities, the fluid jet apparatus having a plurality of process parameters, by:

receiving an indication of speed for each of the plurality of geometric entities of the geometry, wherein at least two geometric entities are associated with different speeds;
automatically and dynamically determining an orientation parameter for each geometric entity in accordance with the indicated speed and the plurality of process parameters; and automatically controlling the motion of cutting head in accordance with the automatically determined orientation parameter to cut the material to produce the target piece.
30. The computer-readable memory medium of claim 29 wherein the at least two entities associated with different speeds are ordered successively such that the two different speeds indicate one of an acceleration and a deceleration.
31. The computer-readable memory medium of claim 30 wherein the orientation parameters for each of the two successive entities are different.
32. The computer-readable memory medium of claim 30 wherein the orientation parameters for each of the two successive entities are the same.
33. The computer-readable memory medium of claim 29 wherein the orientation parameter comprises a taper angle.
34. The computer-readable memory medium of claim 29 wherein the orientation parameter comprises a lead angle.
35. The computer-readable memory medium of claim 29, further comprising instructions that control the computer processor by:
automatically determining a second orientation parameter for each determined speed in accordance with the determined speed and the plurality of process parameters; and controlling the motion of cutting head in accordance with both automatically determined orientation parameters.
36. The computer-readable memory medium of claim 35 wherein the determined first and second orientation parameters comprise a lead angle and a taper angle.
37. The computer-readable memory medium of claim 29 wherein the automatically controlling the motion of the cutting head further comprises:
generating a motion program that indicates the automatically determined orientation parameter for each geometric entity; and forwarding the motion program to a controller of the cutting head; and causing the controller to execute the motion program.
38. The computer-readable memory medium of claim 37 wherein the motion program is tailored to the cutting head controller.
39. The computer-readable memory medium of claim 37 wherein the motion program comprises a plurality of command sequences with an x-y location and at least one of a taper angle compensation value and a lead angle compensation value, so that corrections to the target cut are made transparent to an operator of the jet apparatus.
40. The computer-readable memory medium of claim 37 wherein the motion program comprises a plurality of command sequences that indicate inverse kinematics to control the cutting head according to an x-y location and at least one of a taper angle and a lead angle, in a manner that is transparent to an operator of the jet apparatus.
41. The computer-readable memory medium of claim 29 wherein a predictive model of a cut based upon changing one of a lead angle and a taper angle is used by the computer system to automatically determine the orientation parameter for each determined speed.
42. The computer-readable memory medium of claim 41 wherein the predictive model indicates values for one of lead angles and taper angles as a function of values of speed.
43. The computer-readable memory medium of claim 42 wherein the function of speed is further defined as a function of one of the process parameters.
44. The computer-readable memory medium of claim 43 wherein the process parameter is at least one of abrasive fluid flow rate, nozzle orifice diameter, mixing tube characteristics, abrasive fluid pressure, material thickness, and material type.
45. The computer-readable memory medium of claim 41 wherein the predictive model indicates values for at least one of lead angles and taper angles as a function of values of acceleration.
46. The computer-readable memory medium of claim 41 wherein the predictive model indicates values for at least one of lead angles and taper angles as a function of values of deceleration.
47. The computer-readable memory medium of claim 41 wherein the predictive model indicates values for lead angles and taper angles as a function of values of speed.
48. The computer-readable memory medium of claim 41 wherein the predictive model data is stored in a dynamically modifiable library of code.
49. The computer-readable memory medium of claim 41 wherein the predictive model is represented as a polynomial equation.
50. The computer-readable memory medium of claim 41 wherein the predictive model is based upon a lookup table of discrete values.
51. The computer-readable memory medium of claim 29 wherein the cutting head is controlled by motion around at least 4 axes.
52. The computer-readable memory medium of claim 51 wherein the axes provide tilt and swivel movement of the cutting head relative to the target piece.
53. The computer-readable memory medium of claim 29 wherein the cutting head is controlled by motion around at least 5 axes.
54. The computer-readable memory medium of claim 53 wherein the axes provide tilt and swivel movement of the cutting head relative to the target piece.
55. The computer-readable memory medium of claim 29 wherein the fluid jet apparatus is an abrasive water jet.
56. The computer-readable memory medium of claim 29 wherein the fluid jet apparatus is a high pressure fluid jet.
57. A dynamic fluid jet control system that controls a fluid jet apparatus to produce from a material a target piece with a geometry having a plurality of geometric segments, the fluid jet apparatus having a cutting head that rotates on a plurality of axes, comprising:
cutting head control interface that communicates a plurality of orientation parameters to the cutting head of the fluid jet apparatus to orient the cutting head with respect to the plurality of axes to cut the target piece; and lead and taper modeling component that automatically and dynamically determines a plurality of orientation values for each of a plurality of segments of the geometry in accordance with a determined cutting head speed associated with that segment, at least two segments having associated speeds that are different; and forwards the determined plurality of orientation values for each segment to the cutting head control interface to control the orientation of the cutting head.
58. The system of claim 57 wherein the at least two segments associated with different speeds are ordered successively such that the two different speeds indicate one of an acceleration and a deceleration.
59. The system of claim 58 wherein the determined orientation parameters for each of the two successive entities are different.
60. The system of claim 58 wherein the determined orientation parameters for each of the two successive entities are the same.
61. The system of claim 57 wherein the cutting head control interface and the lead and taper modeling component are embedded in a computer numeric controller of a fluid jet apparatus.
62. The system of claim 57 wherein the automatically determined plurality of orientation values includes lead angle values.
63. The system of claim 62 wherein the automatically determined plurality of orientation values includes taper angle values.
64. The system of claim 62 wherein the automatically determined plurality of orientation values includes standoff compensation values.
65. The system of claim 57 wherein the automatically determined plurality of orientation values includes taper angle values.
66. The system of claim 65 wherein the automatically determined plurality of orientation values includes standoff compensation values.
67. The system of claim 57 wherein the jet fluid apparatus is a greater than three axis system.
68. The system of claim 57 wherein the lead and taper modeling component comprises a data structure having a function that determines lead angles and taper angles based upon process parameters.
69. The system of claim 68 wherein the function determines lead angles and taper angles based upon values representing at least one of speed, acceleration, and deceleration.
70. The system of claim 57 wherein the lead and taper modeling component comprises a data structure that represents a lookup table of discrete values that can be used to predict lead angles and taper angles based upon process parameters.
71. The system of claim 57 wherein the lead and taper modeling component automatically determines the plurality of orientation values for each of the plurality of segments of the geometry in accordance with a plurality of process parameters.
72. The system of claim 71 wherein the process parameters comprise at least one of abrasive fluid flow rate, nozzle orifice diameter, mixing tube characteristics, abrasive fluid pressure, material thickness, and material type.
73. The system of claim 57 wherein the fluid jet apparatus is a water jet apparatus.
74. The system of claim 57 wherein the fluid jet apparatus is a high pressure apparatus.
75. The system of claim 57 wherein the fluid jet apparatus is a low pressure apparatus.
76. A method in a computer system for controlling a jet apparatus to cut along a designated cutting path of a material to produce a target piece having a geometric specification, the jet apparatus having a cutting head and a plurality of modifiable process parameters; comprising:
retrieving a representation of a predictive data model that models the effects of values of at least one orientation characteristic of the cutting head on a cut produced using those values;
automatically and dynamically determining a plurality of values for the at least one orientation characteristic from the retrieved data model representation in accordance with values of the process parameters; and using the determined plurality of values for the at least one orientation characteristic to control the jet apparatus to cut along the designated path to produce the target piece.
77. The method of claim 76, the geometric specification comprising a plurality of geometric entities, wherein the automatically determining the plurality of values further comprises, for each entity:
determining a speed that corresponds to a geometric entity; and using the retrieved representation of the predictive data model to automatically determine a value for the orientation characteristic in accordance with the determined speed.
78. The method of claim 77, wherein the automatically determining of the value for the orientation characteristic in accordance with the determined speed also determines the value in accordance with the process parameter values.
79. The method of claim 77 wherein two of the geometric entities are ordered successively and have different corresponding speeds, thereby indicating one of an acceleration and a deceleration of the jet apparatus.
80. The method of claim 76 wherein the steps are performed by a controller of the jet apparatus.
81. The method of claim 76 wherein the using the determined values to control the jet apparatus further comprises:
generating a motion program to control the jet apparatus, the motion program indicating the determined plurality of values for the orientation characteristic;
and executing the motion program to cause the jet apparatus to cut along the desired path.
82. The method of claim 76 wherein the orientation characteristic is a lead angle of a jet stream of the cutting head relative to the material.
83. The method of claim 76 wherein the orientation characteristic is a taper angle of a jet stream of the cutting head relative to the material.
84. The method of claim 76 wherein the representation of the predictive data model is a programmed function that returns values based upon evaluation of a mathematical equation.
85. The method of claim 84 wherein the mathematical equation is an equation expressed as a function of speed.
86. The method of claim 85, the equation having coefficients, wherein the values of the coefficients are based upon values of the process parameters.
87. The method of claim 85, the equation having coefficients, wherein the values of the coefficients vary with thickness of the material.
88. The method of claim 85 wherein the equation is a polynomial equation.
89. The method of claim 76 wherein the representation of the predictive data model is a look-up table of discrete values and the automatically determining the plurality of values determines values that are derived from the discrete values.
90. A computer-readable memory medium containing instructions that control a computer processor to control a jet apparatus to cut along a designated cutting path of a material to produce a target piece having a geometric specification, the jet apparatus have a cutting head and a plurality of modifiable process parameters, by:
retrieving a representation of a predictive data model that models the effects of values of at least one orientation characteristic of the cutting head on a cut produced using those values;
automatically and dynamically determining a plurality of values for the at least one orientation characteristic from the retrieved data model representation in accordance with values of the process parameters; and using the determined plurality of values for the at least one orientation characteristic to control the jet apparatus to cut along the designated path to produce the target piece.
91. The computer-readable memory medium of claim 90, the geometric specification comprising a plurality of geometric entities, wherein the automatically determining the plurality of values further comprises, for each entity:

determining a speed that corresponds to a geometric entity; and using the retrieved representation of the predictive data model to automatically determine a value for the orientation characteristic in accordance with the determined speed.
92. The computer-readable memory medium of claim 91 wherein the automatically determining of the value for the orientation characteristic in accordance with the determined speed also determines the value in accordance with the process parameter values.
93. The computer-readable memory medium of claim 91 wherein two of the geometric entities are ordered successively and have different corresponding speeds, thereby indicating one of an acceleration and a deceleration of the jet apparatus.
94. The computer-readable memory medium of claim 90 wherein the steps are performed by a controller of the jet apparatus.
95. The computer-readable memory medium of claim 90 wherein the using the determined values to control the jet apparatus fiuther comprises:
generating a motion program to control the jet apparatus, the motion program indicating the determined plurality of values for the orientation characteristic;
and executing the motion program to cause the jet apparatus to cut along the desired path.
96. The computer-readable memory medium of claim 90 wherein the orientation characteristic is a lead angle of a jet stream of the cutting head relative to the material.
97. The computer-readable memory medium of claim 90 wherein the orientation characteristic is a taper angle of a jet stream of the cutting head relative to the material.
98. The computer-readable memory medium of claim 90 wherein the representation of the predictive data model is a programmed function that returns values based upon evaluation of a mathematical equation.
99. The computer-readable memory medium of claim 98 wherein the mathematical equation is an equation expressed as a function of speed.
100. The computer-readable memory medium of claim 99, the equation having coefficients, wherein the values of the coefficients are based upon values of the process parameters.
101. The computer-readable memory medium of claim 99, the equation having coefficients, wherein the values of the coefficients vary with thickness of the material.
102. The computer-readable memory medium of claim 99 wherein the equation is a polynomial equation.
103. The computer-readable memory medium of claim 90 wherein the representation of the predictive data model is a look-up table of discrete values and the automatically determining the plurality of values determines values that are derived from the discrete values.
104. A fluid jet apparatus controller for controlling a cutting head of a fluid jet apparatus to cut along a designated cutting path to produce a target piece, comprising:
memory that contains a predictive data model of the effects of values of an orientation characteristic of the cutting head on a cut produced using those values;
and cutting head control portion that retrieves the predictive data model from the memory;
automatically determines a plurality of values for the orientation characteristic from the retrieved data model in accordance with the designated cutting path; and uses the determined plurality of values for the orientation characteristic to control the cutting head of the jet apparatus to cut along the designated path to produce the target piece.
105. The controller of claim 104 wherein the designated cutting path comprises segments, and wherein the cutting head control portion automatically determines the plurality of values for the orientation characteristic by:
for each segment, determining a desired cutting speed that corresponds to the segment; and using the retrieved data model to automatically determine a value for the orientation characteristic that corresponds to the desired cutting speed.
106. The controller of claim 104 wherein the cutting head control portion uses the determined plurality of values of the orientation characteristic to control the cutting by generating motion instructions that cause the cutting head to cut along the designated path.
107. The controller of claim 104 wherein the orientation characteristic is a lead angle of a jet stream of the cutting head.
108. The controller of claim 104 wherein the orientation characteristic is a taper angle of a jet stream of the cutting head.
109. The controller of claim 104 wherein the predictive data model is a data structure having a program code that returns orientation characteristic values.
110. The controller of claim 109 wherein the program code calculates values based upon an equation that indicates orientation values as a function of speed.
111. The controller of claim 110, the equation having a coefficient, wherein a value of the coefficient is based upon a value of a process parameter.
112. The controller of claim 110 wherein the equation is a polynomial equation.
113. The controller of claim 104 wherein the predictive data model is a data structure that represents a lookup table of discrete values.
114. A fluid jet apparatus control system for controlling a cutting head of a fluid jet apparatus to cut along a designated cutting path to produce a target piece, comprising:
memory that contains a predictive data model of the effects of values of an orientation characteristic of the cutting head on a cut produced using those values;
and cutting head control interface that retrieves the predictive data model from the memory;
automatically determines a plurality of values for the orientation characteristic from the retrieved data model in accordance with the designated cutting path; and uses the determined plurality of values for the orientation characteristic to control the cutting head of the jet apparatus to cut along the designated path to produce the target piece.
115. The control system of claim 114 wherein the designated cutting path comprises segments, and wherein the cutting head control interface automatically determines the plurality of values for the orientation characteristic by:
for each segment, determining a desired cutting speed that corresponds to the segment; and using the retrieved data model to automatically determine a value for the orientation characteristic that corresponds to the desired cutting speed.
116. The control system of claim 114 wherein the cutting head control interface uses the determined plurality of values of the orientation characteristic to control the cutting by generating motion instructions that cause the cutting head to cut along the designated path.
117. The control system of claim 114 wherein the orientation characteristic is a lead angle of a jet stream of the cutting head.
118. The control system of claim 114 wherein the orientation characteristic is a taper angle of a jet stream of the cutting head.
119. The control system of claim 114 wherein the predictive data model is a data structure having a program code that returns orientation characteristic values.
120. The control system of claim 119 wherein the program code calculates values based upon an equation that indicates orientation values as a function of speed.
121. The control system of claim 120, the equation having a coefficient, wherein a value of the coefficient is based upon a value of a process parameter.
122. The control system of claim 120 wherein the equation is a polynomial equation.
123. The control system of claim 114 wherein the predictive data model is a data structure that represents a lookup table of discrete values.
CA 2458884 2001-08-27 2002-08-26 Method and system for automated software control of waterjet orientation parameters Expired - Lifetime CA2458884C (en)

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US09/940,687 2001-08-27
US09/940,687 US6766216B2 (en) 2001-08-27 2001-08-27 Method and system for automated software control of waterjet orientation parameters
PCT/US2002/027226 WO2003018260A1 (en) 2001-08-27 2002-08-26 Method and system for automated software control of waterjet orientation parameters

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EP (2) EP2258516B1 (en)
JP (4) JP2005500176A (en)
AT (1) ATE480368T1 (en)
CA (1) CA2458884C (en)
DE (2) DE02763538T9 (en)
ES (2) ES2528484T3 (en)
MX (1) MXPA04001965A (en)
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