JPS54146241A - Electron beam deflection apparatus - Google Patents
Electron beam deflection apparatusInfo
- Publication number
- JPS54146241A JPS54146241A JP5521078A JP5521078A JPS54146241A JP S54146241 A JPS54146241 A JP S54146241A JP 5521078 A JP5521078 A JP 5521078A JP 5521078 A JP5521078 A JP 5521078A JP S54146241 A JPS54146241 A JP S54146241A
- Authority
- JP
- Japan
- Prior art keywords
- comparator
- acceleration voltage
- buffer
- deflection
- output
- 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.)
- Pending
Links
Landscapes
- Welding Or Cutting Using Electron Beams (AREA)
Abstract
PURPOSE: To enable to start deflection scanning automatically after recovering transient change of acceleration voltage, by providing beam deflection means composed of the acceleration voltage detecting apparatus and beam current detecting apparatus at the electron beam deflection apparatus.
CONSTITUTION: Voltage signal of the acceleration voltage detecting resistance 25 is applied to the comparator 22 through the buffer 21 and that of the beam current detecting resistance 27 is applied to the comparator 29 through the buffer 28. The comparator 22 is set up so as to be changed to the acceleration voltage set point by the set-up device 23 and also the comparator 29 is set up so as to be a fixed output set point by the set-up device 30. The output 24, 31 of the comparator 22, 29 are applied to the AND circuit 32 and deflection scanning start signal is made by the output of the circuit 32 through the buffer 31 and the transistor 34 when the above both outputs are made to the set point and then, deflection scanning of the beam is started automatically. Thus, dislocating of the beam from weld line by transient change of acceleration voltage immediately after the start of welding, is prevented and operation is made easy.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5521078A JPS54146241A (en) | 1978-05-09 | 1978-05-09 | Electron beam deflection apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5521078A JPS54146241A (en) | 1978-05-09 | 1978-05-09 | Electron beam deflection apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54146241A true JPS54146241A (en) | 1979-11-15 |
Family
ID=12992270
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5521078A Pending JPS54146241A (en) | 1978-05-09 | 1978-05-09 | Electron beam deflection apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54146241A (en) |
-
1978
- 1978-05-09 JP JP5521078A patent/JPS54146241A/en active Pending
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