GB1111865A - Improvements relating to beamed energy control systems - Google Patents
Improvements relating to beamed energy control systemsInfo
- Publication number
- GB1111865A GB1111865A GB3710265A GB3710265A GB1111865A GB 1111865 A GB1111865 A GB 1111865A GB 3710265 A GB3710265 A GB 3710265A GB 3710265 A GB3710265 A GB 3710265A GB 1111865 A GB1111865 A GB 1111865A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- cell
- image
- photo
- signals
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K15/00—Electron-beam welding or cutting
- B23K15/02—Control circuits therefor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/02—Details
- H01J37/21—Means for adjusting the focus
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Welding Or Cutting Using Electron Beams (AREA)
- Electron Beam Exposure (AREA)
- Mechanical Optical Scanning Systems (AREA)
- Lasers (AREA)
Abstract
1, 111, 865. Photo-electric machine control systems. FERRANTI Ltd. Nov. 21, 1966 [Aug. 28, 1965; Oct. 14, 1965], Nos. 37102/65 and 43545/65. Heading G1A. [Also in Divisions B3 and G3] The point of impact of an electron, ion or laser beam on a workpiece in beam cutting or welding apparatus is controlled by a servosystem which maintains the image of the light spot produced by the beam on the workpiece centred upon a photoelectric cell. Means are provided to vary the position of the image on the cell in response to a demand signal whereby the beam is moved in accordance with the demand signal. The light spot is imaged by mirrors 55, 56 on to the photocell system 21 which gives X and Y signals on leads 23, 24 indicative of orthogonal deviations of the image from a reference point on the photocell sensitive surface. The photo-cell system is mounted on a carriage 20, the position of which is indicated by X and Y pick-off signals on leads 33 and 34. The X signals and the Y signals are combined and control the X and Y deflection coils 17, 18 for the beam. The demand signal is arranged to move the carriage, and the signals applied to the deflection coils 17, 18, make the beam 13 follow the movements. If the image of the light spot is not in the sensitive area of the cell system, the summed X and Y signal on lead 25 is below a predetermined level and the unit 41 connects a scan generator 42 to the deflection coils 17, 18 to scan the beam until the image is in the sensitive area. Alternatively, Fig. 2 (not shown) the scan signal may be applied to the carriage 20, in which case, the pick off signals are disconnected from the scanning coils 17, 18. The carriage may be fixed and the demand signal applied to a mirror in the optical system between the workpiece and the photo-cell, Fig. 3 (not shown). Photo-cell circuitry. The photo-cell system 21 may be a four sided reflecting pyramid with pairs of photo-cells differentially connected and viewing opposite faces of the pyramid. Preferably, however, it may comprise a single photo-cell of the type in which an electron image of the spot may be oscillated across an aperture 71, Fig. 4, by coils 73, 74. Circuits produce, under control. of a clock generator 75, alternate positive and negative going triangular waveforms with the result that the electron image makes excursions across the aperture in the +X; -Y; -X; +Y directions in sequence. The pulses generated as the image moves out to the edge of the aperture in each of these directions are separated by gating circuitry synchronized by the clock, and the difference between the +X and -X pulses is smoothed by integrating amplifier 102 and forms the X signal on lead 23, Fig. 1. The Y signal is produced similarly. Automatic beam focusing. The focus coils 16, Fig. 7, are fed from a potentiometer 133 fed with a steady D. C. at its ends and an A. C. signal from an oscillator 136. The X+Y output from the cell on lead 25 oscillates with the variation of focus and is fed together with a reference phase from oscillator, to a phase-sensitive rectifier 141 to produce a D. C. error signal magnitude and sense dependent upon the deviation of the focus from its optimum. The error signal optimizes the focus by actuating a motor 135 to adjust the potentiometer tap 134.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3710265A GB1111865A (en) | 1965-08-28 | 1965-08-28 | Improvements relating to beamed energy control systems |
DE19661565539 DE1565539B2 (en) | 1965-08-28 | 1966-08-27 | Device for controlling the impingement track of a corpuscular beam bundle on a workpiece |
NL6612153A NL144771B (en) | 1965-08-28 | 1966-08-29 | DEVICE FOR SUPPLYING BUNDLED ENERGY TO THE SURFACE OF A WORKPIECE. |
US756725A US3471703A (en) | 1965-08-28 | 1968-08-15 | Photoelectric control means for the deflection of the electron beam in welding apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3710265A GB1111865A (en) | 1965-08-28 | 1965-08-28 | Improvements relating to beamed energy control systems |
GB4354565 | 1965-10-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1111865A true GB1111865A (en) | 1968-05-01 |
Family
ID=26263330
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3710265A Expired GB1111865A (en) | 1965-08-28 | 1965-08-28 | Improvements relating to beamed energy control systems |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE1565539B2 (en) |
GB (1) | GB1111865A (en) |
NL (1) | NL144771B (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2151777A (en) * | 1983-12-10 | 1985-07-24 | Stahler Gmbh & Co Kg Gustav | Method and device for monitoring or controlling the welding process when welding workpieces with the arc-welding method |
GB2202647A (en) * | 1987-03-25 | 1988-09-28 | Atomic Energy Authority Uk | Laser beam focussing |
GB2300534A (en) * | 1995-05-04 | 1996-11-06 | Blz Gmbh | Automatic focussing of industrial laser beam |
CN113909637A (en) * | 2021-09-30 | 2022-01-11 | 北京博清科技有限公司 | Control method and control device for welding equipment and welding system |
-
1965
- 1965-08-28 GB GB3710265A patent/GB1111865A/en not_active Expired
-
1966
- 1966-08-27 DE DE19661565539 patent/DE1565539B2/en not_active Withdrawn
- 1966-08-29 NL NL6612153A patent/NL144771B/en not_active IP Right Cessation
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2151777A (en) * | 1983-12-10 | 1985-07-24 | Stahler Gmbh & Co Kg Gustav | Method and device for monitoring or controlling the welding process when welding workpieces with the arc-welding method |
GB2202647A (en) * | 1987-03-25 | 1988-09-28 | Atomic Energy Authority Uk | Laser beam focussing |
GB2300534A (en) * | 1995-05-04 | 1996-11-06 | Blz Gmbh | Automatic focussing of industrial laser beam |
CN113909637A (en) * | 2021-09-30 | 2022-01-11 | 北京博清科技有限公司 | Control method and control device for welding equipment and welding system |
CN113909637B (en) * | 2021-09-30 | 2024-02-02 | 北京博清科技有限公司 | Control method and control device of welding equipment and welding system |
Also Published As
Publication number | Publication date |
---|---|
DE1565539A1 (en) | 1970-03-19 |
NL144771B (en) | 1975-01-15 |
NL6612153A (en) | 1967-03-01 |
DE1565539B2 (en) | 1971-01-21 |
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