GB1136821A - Improvements in or relating to numerical control systems - Google Patents
Improvements in or relating to numerical control systemsInfo
- Publication number
- GB1136821A GB1136821A GB630565A GB630565A GB1136821A GB 1136821 A GB1136821 A GB 1136821A GB 630565 A GB630565 A GB 630565A GB 630565 A GB630565 A GB 630565A GB 1136821 A GB1136821 A GB 1136821A
- Authority
- GB
- United Kingdom
- Prior art keywords
- counter
- count
- speed
- pulses
- stepping motor
- 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
- 238000006073 displacement reaction Methods 0.000 abstract 2
- 239000012530 fluid Substances 0.000 abstract 1
- 230000006698 induction Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000007493 shaping process Methods 0.000 abstract 1
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
- G05B19/19—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 positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path
- G05B19/39—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 positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path using a combination of the means covered by at least two of the preceding groups G05B19/21, G05B19/27 and G05B19/33
Landscapes
- Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Control Of Velocity Or Acceleration (AREA)
Abstract
1,136,821. Programmed control of position. TELEHOIST Ltd. May 5, 1966 [Feb.13, 1965], No. 6305/65. Heading G3N. A numerical control system for positioning an element relatively to an earlier or datum position comprises a digital control section which is operative during most of the measured movement and an analogue control section which is operative during final positioning. As shown, a lead-screw is driven by an hydraulic motor 2, the speed of which is determined by a controller 3 supplied with hydraulic fluid through a solenoid valve 5 from a pump 4. The valve 5 cuts out the controller 3 and brings in a slow-speed restrictor 6. Driven from the other end of the lead-screw is an induction transducer 8 and a photo-electric pulse producing device 9 which, through a pulse shaping circuit 20, drives a stepping motor 10 coupled to the rotor of the transducer. The pulses from the circuit 20 are also fed to counter 45 having a bank of manual switches 46, set up for cutter offset, which, when empty, transfers the pulses by an electronic switch 21 to count down a displacement counter 23 set up by manual switches 24. At a first predetermined count during emptying the counter 23 provides a signal which actuates the solenoid valve 5 to bring into operation the slow-speed restrictor 6, and at a second predetermined count an electronic relay 19 disconnects the pulsing device 9 from the circuit 20 and connects it to a circuit 46 which provides a pulse train which rapidly empties the counter 23 and positions the stepping motor in advance of the lead-screw. At zero count, a digital to analogue change-over switch 42 renders operative relay contacts 40 and isolates the stepping motor 10. The hydraulic motor is then actuated through the contacts 40 by a relay 38 responsive to the positional signal from the transducer 8 through a demodulator 37. A manually set potentiometer 43 provides fine adjustment of the final position. In a modification, a high-speed resetting counter 50 is connected between a gate 52 and a two-way switch 51 which feed the pulses from the device 9 to cycle the counter 50 and countdown the displacement counter 23 until the table is within a short distance from the final position when the pulses are routed to the stepping motor 10 instead of the counter 50. The count in counter 23 is set through binaryto-decimal decode devices 26 and stores 28 by uni-selectors 27 responsive to a tape-reader 25. The tape-reader additionally sets the count in the off-set counter 45 and the speed of the hydraulic motor 2 by adjustment of the controller 3.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB630565A GB1136821A (en) | 1965-02-13 | 1965-02-13 | Improvements in or relating to numerical control systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB630565A GB1136821A (en) | 1965-02-13 | 1965-02-13 | Improvements in or relating to numerical control systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1136821A true GB1136821A (en) | 1968-12-18 |
Family
ID=9812082
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB630565A Expired GB1136821A (en) | 1965-02-13 | 1965-02-13 | Improvements in or relating to numerical control systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1136821A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2083627A1 (en) * | 1970-03-27 | 1971-12-17 | Digital Apparatus Corp | |
FR2204485A1 (en) * | 1972-10-25 | 1974-05-24 | Production Technology Inc |
-
1965
- 1965-02-13 GB GB630565A patent/GB1136821A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2083627A1 (en) * | 1970-03-27 | 1971-12-17 | Digital Apparatus Corp | |
FR2204485A1 (en) * | 1972-10-25 | 1974-05-24 | Production Technology Inc |
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