JPS5440374A - Prevention of wrong operation of numerical-controlled machine tool - Google Patents

Prevention of wrong operation of numerical-controlled machine tool

Info

Publication number
JPS5440374A
JPS5440374A JP10642077A JP10642077A JPS5440374A JP S5440374 A JPS5440374 A JP S5440374A JP 10642077 A JP10642077 A JP 10642077A JP 10642077 A JP10642077 A JP 10642077A JP S5440374 A JPS5440374 A JP S5440374A
Authority
JP
Japan
Prior art keywords
signal
machine tool
absolute
prevention
abnormality
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
JP10642077A
Other languages
Japanese (ja)
Inventor
Jiro Chiba
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.)
Komatsu Ltd
Original Assignee
Komatsu Ltd
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 Komatsu Ltd filed Critical Komatsu Ltd
Priority to JP10642077A priority Critical patent/JPS5440374A/en
Publication of JPS5440374A publication Critical patent/JPS5440374A/en
Pending legal-status Critical Current

Links

Landscapes

  • Automatic Control Of Machine Tools (AREA)
  • Numerical Control (AREA)

Abstract

PURPOSE: To stop a machine tool by comparing the integrated value of output of an incremental position detector with the absolute position detected by an absolute position detector and producing an abnormality signal when the difference between said integrated value and said absolute position exceeds a predetermined level.
CONSTITUTION: In a control circuit for prevention of worng operation, a position command generator 1 generates a command position signal OS indicative of command position and the signal is applied to a controller 2. Another signal IS is also applied to the controller 2 from the incremental position detector 5 for detecting the displacement of a moving table 7. A signal DC for driving a motor 3 is produced depending on these signals IS, OS. An abnormality discriminator 9 compares the table position detected by an absolute signal with the table position detected by the signal IS, and generates the abnormality signal when the difference between both the table positions exceeds the predetermined level, thereby stopping the machine tool
COPYRIGHT: (C)1979,JPO&Japio
JP10642077A 1977-09-05 1977-09-05 Prevention of wrong operation of numerical-controlled machine tool Pending JPS5440374A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10642077A JPS5440374A (en) 1977-09-05 1977-09-05 Prevention of wrong operation of numerical-controlled machine tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10642077A JPS5440374A (en) 1977-09-05 1977-09-05 Prevention of wrong operation of numerical-controlled machine tool

Publications (1)

Publication Number Publication Date
JPS5440374A true JPS5440374A (en) 1979-03-29

Family

ID=14433164

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10642077A Pending JPS5440374A (en) 1977-09-05 1977-09-05 Prevention of wrong operation of numerical-controlled machine tool

Country Status (1)

Country Link
JP (1) JPS5440374A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57143615A (en) * 1981-03-02 1982-09-04 Sanesu Shoko:Kk Positioning control method
JPS59169751A (en) * 1983-03-16 1984-09-25 Nakamuratome Seimitsu Kogyo Kk Sliding table abnormality monitoring device
JPS59226801A (en) * 1983-06-08 1984-12-20 Matsushita Electric Ind Co Ltd Position detector
US4725959A (en) * 1985-03-30 1988-02-16 Fanuc Ltd. Numerically controlled machine tool
JPH03100411A (en) * 1989-09-14 1991-04-25 Brother Ind Ltd Abnormality deciding device of position detector
US6666789B2 (en) 2000-11-15 2003-12-23 Hyundai Motor Company Frictional variable transmission for vehicle
JP2006242599A (en) * 2005-02-28 2006-09-14 Okuma Corp Linear encoder

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57143615A (en) * 1981-03-02 1982-09-04 Sanesu Shoko:Kk Positioning control method
JPS59169751A (en) * 1983-03-16 1984-09-25 Nakamuratome Seimitsu Kogyo Kk Sliding table abnormality monitoring device
JPS59226801A (en) * 1983-06-08 1984-12-20 Matsushita Electric Ind Co Ltd Position detector
JPH0515963B2 (en) * 1983-06-08 1993-03-03 Matsushita Electric Ind Co Ltd
US4725959A (en) * 1985-03-30 1988-02-16 Fanuc Ltd. Numerically controlled machine tool
JPH03100411A (en) * 1989-09-14 1991-04-25 Brother Ind Ltd Abnormality deciding device of position detector
US6666789B2 (en) 2000-11-15 2003-12-23 Hyundai Motor Company Frictional variable transmission for vehicle
JP2006242599A (en) * 2005-02-28 2006-09-14 Okuma Corp Linear encoder

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