GB885026A - Line tracer scanning head - Google Patents
Line tracer scanning headInfo
- Publication number
- GB885026A GB885026A GB2069358A GB2069358A GB885026A GB 885026 A GB885026 A GB 885026A GB 2069358 A GB2069358 A GB 2069358A GB 2069358 A GB2069358 A GB 2069358A GB 885026 A GB885026 A GB 885026A
- Authority
- GB
- United Kingdom
- Prior art keywords
- photo
- cell
- frequency
- line
- signal
- 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
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q35/00—Control systems or devices for copying directly from a pattern or a master model; Devices for use in copying manually
- B23Q35/04—Control systems or devices for copying directly from a pattern or a master model; Devices for use in copying manually using a feeler or the like travelling along the outline of the pattern, model or drawing; Feelers, patterns, or models therefor
- B23Q35/08—Means for transforming movement of the feeler or the like into feed movement of tool or work
- B23Q35/12—Means for transforming movement of the feeler or the like into feed movement of tool or work involving electrical means
- B23Q35/127—Means for transforming movement of the feeler or the like into feed movement of tool or work involving electrical means using non-mechanical sensing
- B23Q35/128—Sensing by using optical means
-
- 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
- B23K7/00—Cutting, scarfing, or desurfacing by applying flames
- B23K7/002—Machines, apparatus, or equipment for cutting plane workpieces, e.g. plates
- B23K7/004—Seam tracking
Abstract
885,026. Electric copying machines. CANADIAN WESTINGHOUSE CO. Ltd. June 27, 1958 [July 18, 1957], No. 20693/58. Class 38 (6). [Also in Group XL (b)] In a line tracing system the scanning axis of a photo-electric arrangement intersects a plane on which is formed an image of the line to be followed, the photo-electric signals operate on a control system to maintain the scanning axis in a position transverse to and bisected by the line image. A line drawing 20 is illuminated by lamps 18 and an image thereof is produced on the ground glass disc 23 and scanned by a photo-cell 24 which is supported by a beam 25 suspended by a flat spring 26 within the scanning head 8. A permanent magnet 27 attached to the beam co-operates with an electromagnet 28 supplied at mains frequency resulting in a swing of the beam across the disc 23 twice each supply frequency cycle. When the scanning axis is correctly positioned with respect to the line image the frequency of the output signal from the cell is twice the supply frequency and when the axis deviates from this position the cell signal includes a component at the supply frequency which is selected and amplified. The amplified signal is applied to one phase of a twophase servomotor 38, the other phase of the motor is supplied from the mains supply and the motor drives a gear chain 11, 12, 13, 14, 15, 16 and 17 to guide the shaft 36 supporting the drive wheel 42 and the scanning head in a direction which brings the scanning axis to its correct position. The amount by which the head is turned and the direction of turning are controlled respectively by the amplitude of the selected signal and its phase with respect to the supply frequency. A tachometer 39 produces a signal which varies the gain of the amplifier in inverse relationship to the servomotor speed, this damps the movement of the arrangement and prevents overshoot. The assembly is driven by a motor 37 coupled to the wheel 42. In a second arrangement, Figs. 3 and 4 (not shown), the swinging photo-cell is replaced by two fixed cells which are alternately energized at mains frequency.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA733095 | 1957-07-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB885026A true GB885026A (en) | 1961-12-20 |
Family
ID=4141016
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2069358A Expired GB885026A (en) | 1957-07-18 | 1958-06-27 | Line tracer scanning head |
Country Status (4)
Country | Link |
---|---|
CH (1) | CH372733A (en) |
DE (1) | DE1187714B (en) |
FR (1) | FR1214876A (en) |
GB (1) | GB885026A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1233052B (en) * | 1965-10-26 | 1967-01-26 | British Oxygen Co Ltd | Device for optical scanning or tracking of lines |
DE1255185B (en) * | 1963-12-21 | 1967-11-30 | Siemens Ag | Photoelectric scanning device for the control of machines according to a given line |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3135904A (en) * | 1962-01-15 | 1964-06-02 | Air Reduction | Photoelectric line or edge tracer |
DE1265271B (en) * | 1964-02-07 | 1968-04-04 | Air Reduction | Device for scanning a long character |
GB1087467A (en) * | 1964-05-06 | 1967-10-18 | Decca Ltd | Improvements in or relating to the controlling of industrial processes |
GB1128901A (en) * | 1964-10-28 | 1968-10-02 | British Oxygen Co Ltd | A boundary follower |
DE1228705B (en) * | 1964-12-10 | 1966-11-17 | Messer Griescheim Ges Mit Besc | Directional filter for a photoelectric scanning device of machine tools |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE931026C (en) * | 1941-10-02 | 1955-07-28 | Messerschmitt Boelkow Blohm | Post-forming machine with automatic control by photoelectric scanning of a drawing |
FR924779A (en) * | 1946-03-07 | 1947-08-14 | Cellophane Sa | Correction mechanism for machines intended for the manufacture of packaging made of cellulose film or the like and machines comprising applications |
US2489305A (en) * | 1948-02-12 | 1949-11-29 | Miles A Mclennan | Photoelectric curve following device |
US2594716A (en) * | 1948-05-22 | 1952-04-29 | Hays Corp | Electronic program controller |
DE847353C (en) * | 1950-03-04 | 1952-08-25 | Schoppe & Faeser Feinmechanik | Device for scanning flat curves |
-
1958
- 1958-06-27 GB GB2069358A patent/GB885026A/en not_active Expired
- 1958-07-04 DE DEC17123A patent/DE1187714B/en active Pending
- 1958-07-17 CH CH6186558A patent/CH372733A/en unknown
- 1958-07-17 FR FR770495A patent/FR1214876A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1255185B (en) * | 1963-12-21 | 1967-11-30 | Siemens Ag | Photoelectric scanning device for the control of machines according to a given line |
DE1233052B (en) * | 1965-10-26 | 1967-01-26 | British Oxygen Co Ltd | Device for optical scanning or tracking of lines |
Also Published As
Publication number | Publication date |
---|---|
FR1214876A (en) | 1960-04-12 |
CH372733A (en) | 1963-10-31 |
DE1187714B (en) | 1965-02-25 |
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