JPS645690A - Laser beam machine - Google Patents

Laser beam machine

Info

Publication number
JPS645690A
JPS645690A JP62161694A JP16169487A JPS645690A JP S645690 A JPS645690 A JP S645690A JP 62161694 A JP62161694 A JP 62161694A JP 16169487 A JP16169487 A JP 16169487A JP S645690 A JPS645690 A JP S645690A
Authority
JP
Japan
Prior art keywords
light
circuit
signals
signal
smoke
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
Application number
JP62161694A
Other languages
Japanese (ja)
Inventor
Hirohisa Segawa
Masayuki Sugawara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP62161694A priority Critical patent/JPS645690A/en
Publication of JPS645690A publication Critical patent/JPS645690A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To prevent optical parts from deteriorating and poor working from occurring in a beam conduct by providing a smoke detecting means in the beam duct shielding laser beams and actuating an output control means by signals from this smoke detecting means. CONSTITUTION:When smoke powder 20, etc., flows into the beam duct light emitted from a light emitting diode 13 is scattered by the smoke powder 20 and part of the light arrives at a light sensor 14. This light is detected by the sensor 14, becomes electrically conductive, is amplified by a light receiving amplifier circuit 15 and outputted as pulse signals. Since an analog switch 17 repeats ONs, OFFs synchronizing with signals of the synchronous pulse generating circuit 16, only signals by the induced light sensor 14 are inputted into a voltage hold circuit 18. The circuit 18 clamps a signal from the light receiving amplifier circuit 15, converts it into a DC signal, and outputs it. When a comparison circuit 19 compares it with a threshold value signal VTH and the signal of the voltage hold circuit 18 is larger than the threshold value signal VTH, the relay is excited and the laser beam stops oscillation as soon as buzzer operates.
JP62161694A 1987-06-29 1987-06-29 Laser beam machine Pending JPS645690A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62161694A JPS645690A (en) 1987-06-29 1987-06-29 Laser beam machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62161694A JPS645690A (en) 1987-06-29 1987-06-29 Laser beam machine

Publications (1)

Publication Number Publication Date
JPS645690A true JPS645690A (en) 1989-01-10

Family

ID=15740087

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62161694A Pending JPS645690A (en) 1987-06-29 1987-06-29 Laser beam machine

Country Status (1)

Country Link
JP (1) JPS645690A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05212575A (en) * 1992-02-07 1993-08-24 Fanuc Ltd Laser beam machine
WO2012050191A1 (en) 2010-10-15 2012-04-19 三菱電機株式会社 Laser processing machine and bellows device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05212575A (en) * 1992-02-07 1993-08-24 Fanuc Ltd Laser beam machine
WO2012050191A1 (en) 2010-10-15 2012-04-19 三菱電機株式会社 Laser processing machine and bellows device
US8803026B2 (en) 2010-10-15 2014-08-12 Mitsubishi Electric Corporation Laser machining device and bellows device

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