GB1170266A - Numerically Programmed Digital Continuous-path Machine Tool Control System - Google Patents
Numerically Programmed Digital Continuous-path Machine Tool Control SystemInfo
- Publication number
- GB1170266A GB1170266A GB4934466A GB4934466A GB1170266A GB 1170266 A GB1170266 A GB 1170266A GB 4934466 A GB4934466 A GB 4934466A GB 4934466 A GB4934466 A GB 4934466A GB 1170266 A GB1170266 A GB 1170266A
- Authority
- GB
- United Kingdom
- Prior art keywords
- programmed
- counter
- counters
- angle
- values
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
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
- G05B19/41—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 interpolation, e.g. the computation of intermediate points between programmed end points to define the path to be followed and the rate of travel along that path
- G05B19/4103—Digital interpolation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/17—Function evaluation by approximation methods, e.g. inter- or extrapolation, smoothing, least mean square method
-
- 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
- G05B2219/34—Director, elements to supervisory
- G05B2219/34159—Delta theta
-
- 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
- G05B2219/50—Machine tool, machine tool null till machine tool work handling
- G05B2219/50334—Tool offset, diameter correction
-
- 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
- G05B2219/50—Machine tool, machine tool null till machine tool work handling
- G05B2219/50336—Tool, probe offset for curves, surfaces, contouring
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Mathematical Physics (AREA)
- Data Mining & Analysis (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Computing Systems (AREA)
- Manufacturing & Machinery (AREA)
- Algebra (AREA)
- Automation & Control Theory (AREA)
- Human Computer Interaction (AREA)
- Databases & Information Systems (AREA)
- Software Systems (AREA)
- General Engineering & Computer Science (AREA)
- Numerical Control (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
1,170,266. Programmed control of machine tools. BROWN, BOVERI & CO. Ltd. Nov.3, 1966 [Nov.5, 1965], No.49344/66. Heading G3N. A numerically programmed digital control apparatus for producing movement of a machine tool member along a desired path relative to first and second co-ordinate axes comprises a function generator for storing data relating to a reference circular arc which is responsive to programmed signals to produce signals relating to movement along a polygonal path approximating to selected section of the arc. As shown, for each axis of movement a speed counter GZ is cyclically counted down to zero from a set value by pulses from an oscillator O. At each zero count a pulse is generated by the counter GZ which is applied (1) to count down a step-counter SZ from a set value and (2) to a difference counter DZ of an axis positioning servosystem ORK. At zero count, the step counter SZ generates a signal which closes a gate T3, through a gate T2, to stop the supply of pulses to the speed counter GZ. When the signals from the step counters SZ for both axes exist at the input to a gate T4 a function generator FG is stepped to set up new initial counts in the counters GZ, SZ. The function generator FG comprises permanent stores FS and MP which determine the initial counts in counters GZ, SZ whereby a controlled machine tool member follows an approximation of a section of a quadrantal arc in the form of a polygonal progression consisting of chords, each corresponding to a constant small angle. The step counters SZ contain an initial count corresponding to the differential amounts of traverse along the X and Y axes for a step in dependence on a particular angle. The speed counters GZ contain an initial count dependent on the sine or cosine of the step angle for the X or Y axis, respectively. The store FS comprises code discs, driven by stepping motor, bearing incremental binary coded decimal values for constant angle points along a quadrantal arc of a circle of unit radius. The stepping motor is positioned by a programmed angle signal. The BCD values drived from the coded-discs, by a contact-making element, is multiplied in a multiplier MP with the programmed radius. The programmed angle and radius values are derived from a punched-tape reader, not shown. Further code-disc, coupled to the stepping motor, bear the sine and cosine values for the speed counters GZ. The programmed velocity is fed to a delay device VR controlling a converter W changing the pulse rate from the oscillator O by selecting frequency determining capacitors. For small sine and cosine values, a signal from the function store FS actuates a change-over switch US1 whereby the pulse rate is reduced by a factor of 10, as necessitating the code discs to be made for three significant figures only. The difference counter DZ of the servosystem is fed with actual position pulses Mx, My and the error through a digital to analogue converter DA controls an axis positioning motor M, feedback being provided by a tachogenerator T to a servoamplifier RV.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1530565A CH426993A (en) | 1965-11-05 | 1965-11-05 | Digital continuous path control for machine tools |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1170266A true GB1170266A (en) | 1969-11-12 |
Family
ID=4408014
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4934466A Expired GB1170266A (en) | 1965-11-05 | 1966-11-03 | Numerically Programmed Digital Continuous-path Machine Tool Control System |
Country Status (7)
Country | Link |
---|---|
AT (1) | AT260655B (en) |
BE (1) | BE689216A (en) |
CH (1) | CH426993A (en) |
GB (1) | GB1170266A (en) |
NL (1) | NL6615571A (en) |
NO (1) | NO122348B (en) |
SE (1) | SE334497B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1988007709A1 (en) * | 1987-03-27 | 1988-10-06 | B.V. Optische Industrie "De Oude Delft" | Method and system serving to cause an object to follow a spatially fixed target path |
CN110695762A (en) * | 2018-07-10 | 2020-01-17 | 发那科株式会社 | Control device for machine tool |
-
1965
- 1965-11-05 CH CH1530565A patent/CH426993A/en unknown
-
1966
- 1966-10-19 AT AT974866A patent/AT260655B/en active
- 1966-11-03 BE BE689216D patent/BE689216A/xx unknown
- 1966-11-03 NO NO16544866A patent/NO122348B/no unknown
- 1966-11-03 SE SE1509366A patent/SE334497B/xx unknown
- 1966-11-03 GB GB4934466A patent/GB1170266A/en not_active Expired
- 1966-11-04 NL NL6615571A patent/NL6615571A/xx unknown
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1988007709A1 (en) * | 1987-03-27 | 1988-10-06 | B.V. Optische Industrie "De Oude Delft" | Method and system serving to cause an object to follow a spatially fixed target path |
CN110695762A (en) * | 2018-07-10 | 2020-01-17 | 发那科株式会社 | Control device for machine tool |
CN110695762B (en) * | 2018-07-10 | 2022-02-01 | 发那科株式会社 | Control device for machine tool |
Also Published As
Publication number | Publication date |
---|---|
SE334497B (en) | 1971-04-26 |
NL6615571A (en) | 1967-05-08 |
AT260655B (en) | 1968-03-11 |
BE689216A (en) | 1967-04-14 |
CH426993A (en) | 1966-12-31 |
NO122348B (en) | 1971-06-14 |
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