Patent EP0073495B1 successfully refreshed from Google Patents.
EP0073495B1
Expired / Lapsed
EP
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Method and apparatus for measuring a workpiece
Assignee: Shibaura Machine Co Ltd
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Filing: 1982-08-27
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Granted: 1989-03-15
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Expires: 2002-08-27
Abstract
No abstract record available.
Inventors
- 👤 Takao Manabe
- 👤 Fumio Kamahora
- 👤 Tetsu Yoshida
- 👤 Masakazu Kanemoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 18:49
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/401; G01; G01B; G01B7/00; G01B7/02; G01B7/023; G05B2219/00; G05B2219/30; G05B2219/37; G05B2219/37207; G05B2219/37405
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
305 words
A method for making measurements on a workpiece which may have a foreign substance adhered thereto and which is mounted on an apparatus of the type which includes a detector for producing a detecting signal when the detector is brought into or out of contact with the workpiece; a driving means for relatively moving the detector with respect to the workpiece; a control means for producing a signal corresponding to an amount by which the detector is moved with respect to the workpiece and for causing the driving means to stop in accordance with said detecting signal; and a position detection means for detecting the position of the detector, characterized by relatively moving the detector (1) towards the workpiece (W) at a first speed (V,); producing a detecting signal corresponding to the contact position at which the detector (1) contacts with the workpiece (W) or a foreign substance during movement at the first speed; applying a stop signal which is produced by the control means (4, 14) in response to a detecting signal given from the detector (1) to the driving means (2, 12); relatively moving the detector (1) in a direction away from the workpiece (W) at a second speed (V 2 ) to a position closely adjacent the contact position corresponding to the first detecting signal; further relatively moving the detector (1) in a direction towards the contact position at a third speed (V 3 ) smaller than the first and the second speeds; producing another detecting signal corresponding to the detector position at which the detector (1) is brought into or out of contact with the workpiece (W) during the movement at the third speed (V 3 ); and reading out the contents of the position detecting means (6, 16) when the detecting signal is produced while moving at the third speed.
Claim 2
Independent Claim
305 words
A method for making measurements on a workpiece which may have a foreign substance adhered thereto and which is mounted on an apparatus of the type which includes a detector for producing a detecting signal when the detector is brought into or out of contact with the workpiece; a driving means for relatively moving the detector with respect to the workpiece; a control means for producing a signal corresponding to an amount by which the detector is moved with respect to the workpiece and for causing the driving means to stop in accordance with said detecting signal; and a position detection means for detecting the position of the detector, characterized by relatively moving the detector (1) towards the workpiece (W) at a first speed (V,); producing a detecting signal corresponding to the contact position at which the detector (1) contacts with the workpiece (W) or a foreign substance during movement at the first speed; applying a stop signal which is produced by the control means (4, 14) in response to a detecting signal given from the detector (1) to the driving means (2, 12); relatively moving the detector (1) in a direction away from the workpiece (W) at a second speed (V 2 ) to a position closely adjacent the contact position corresponding to the first detecting signal; further relatively moving the detector (1) in a direction towards the contact position at a third speed (V 3 ) smaller than the first and the second speeds; producing another detecting signal corresponding to the detector position at which the detector (1) is brought into or out of contact with the workpiece (W) during the movement at the third speed (V 3 ); and reading out the contents of the position detecting means (6, 16) when the detecting signal is produced while moving at the third speed.
Claim 3
Dependent Claim
175 words
A method as in claim 1 which, following to the step of applying a stop signal which is produced by the control means in response to a detecting signal given from the detector to the driving means, comprises the steps of: storing a representation of the amounts of movement by which the detector (1) still moves and then stops after said stop signal to said driving means (2, 12) is produced; relatively moving the detector (1) in a direction away from the workpiece (W) at a second speed (V 2 ) for a distance dependent upon the stored representation; further relatively moving the detector (1) in the direction away from the workpiece (W) at a third speed (V 3 ) smaller than the first and the second speed; detecting that said detector (1) is brought out of contact with the workpiece (W) during moving at the third speed (V 3 ); and reading out the contents of the position detecting means (6, 16) when the detecting signal is produced while moving at the third speed.
Claim 4
Dependent Claim
200 words
A method as in claim 1 which, following the step of applying a stop signal which is produced by the control means in response to a detecting signal given from the detector to the driving means, comprises the steps of: storing a representation of the amount of movement by which the detector (1) still moves and then stops after said stop signal to said driving means (2, 12) is produced; relatively moving the detector (1) in a direction away from the workpiece (W) at a second speed (V 2 ) for a distance dependent upon the stored representation; further relatively moving the detector (1) in a direction approaching the workpiece (W) at a third speed (V 3 ), smaller than the first and second speeds after the detector (1) is moved a distance corresponding to the stored representation and after a detecting signal showing that the detector (1) is brought out of contact with the workpiece (W) is generated; then detecting contact of said detector (1) with the workpiece (W) while moving at the third speed; and reading out the contents of the position detecting means (6, 16) when the detecting signal is produced while moving at said third speed.
Claim 5
Dependent Claim
122 words
A method as in claim 3, wherein said further relatively moving step comprises: detecting that the detector (1) is brought out of contact with the workpiece (W), while the detector (1) moves in the direction away from the workpiece (W) at the second speed (V 2 ); applying another stop signal which is produced by the control means (4, 14) in response to a detecting signal given from the detector (1) to the driving means (2, 12); and then relatively moving the detector (1) in the direction approaching the workpiece (W) at the third speed (V 3 ) smaller than the first and second speeds after the detector (1) is stopped by said stop signal applied to said driving means (2, 12).
Claim 6
Dependent Claim
225 words
A method as in claim 1 which, following the step of relatively moving the detector in a direction approaching the workpiece at a first speed (V i ), comprises the steps of: detecting that the detector (1) contacts with the workpiece (W) while moving at the first speed (V 1 ); applying a stop signal which is produced by the control means (4, 14) in response to a detecting signal given from the detector (1), to the driving means (2, 12); relatively moving the detector (1) again, after the detector (1) stops in response to said stop signal, in a direction away from the workpiece (W) at a second speed (V 3 ) for a distance which is larger than the distance which the detector (1) moves and stops after said detecting signal is produced; further relatively moving the detector (1) in a direction towards the workpiece (W) at a third speed (V 3 ) smaller than the first and second speed after the detector (1) moves by said distance at the second speed (V 2 ); then, detecting again when the detector (1) is brought into contact with the workpiece (W) while moving at the third speed (V 3 ); and reading out the contents of the position detecting means (6, 16) when the detecting signal is produced while moving at the third speed.
Claim 7
Dependent Claim
221 words
A method as in claim 1 which, following the step of applying a stop signal which is produced by the control means in response to a detecting signal given from the detector to the driving means, comprises the steps of: storing a representation of the amount of movement by which the detector (1) still moves and then stops after said stop signal to said driving means (2, 12) is produced; relatively moving the detector (1) in a direction away from the workpiece (W) at a second speed (V 2 ) for a distance dependent upon the stored representation; detecting whether or not the detector (1) is brought out of contact with the workpiece (W) while moving at the second speed (V 2 ); further relatively moving the detector (1) at a third speed (V 3 ) smaller than the first and second speeds and in a direction dependent upon whether or not the detector (1) was brought out of contact with the workpiece (W) while moving at the second speed (V 2); detecting that said detector (1) is brought out of or into contact with the workpiece (W) during moving at the third speed (V 3 ); and reading out the contents of the position detecting means (6, 16) when the detecting signal is produced while moving at the third speed.
Claim 8
Dependent Claim
307 words
Apparatus for measuring a workpiece, which comprises: a detector (1) for producing a first detecting signal when the detector (1) is brought into or out of contact with the workpiece (W); driving means (2, 12) for relatively moving the detector (1) with respect to the workpiece (W) at a first speed (V i ); control means (4, 14) for producing a signal corresponding to an amount by which the detector (1) is moved with respect to the workpiece (W) and for causing said driving means (2, 12) to stop in accordance with said detecting signal; position detecting means (6, 16) for detecting the position of the detector (1); said control means (4, 14) further including timing signal generating means which generates a timing signal with a predetermined time period; gating means which produces a first stop signal synchronized with the timing signal from the first detecting signal generated by the detector (1) when it contacts with the workpiece (W) while moving at the first speed (V 1 ) characterized by command means which commands the driving means (2, 12) so that said detector (1) moves to a position closely near a contact position corresponding to the first detecting signal at a second speed (V 2 ) after the detector (1) stops in accordance with said first stop signal, and then which commands the driving means (2, 12) so that the detector (1) moves towards or away from the workpiece (W) at a third speed (V 3 ) smaller than said first (V 1 ) and second (V 2 ) speeds after reaching said position closely near the contact position at the second speed (V 2 ); and read out means for reading out the position of the detector (1) when another detecting signal is provided while the detector (1) moves at the third speed (V 3 ).
Claim 9
Dependent Claim
307 words
Apparatus for measuring a workpiece, which comprises: a detector (1) for producing a first detecting signal when the detector (1) is brought into or out of contact with the workpiece (W); driving means (2, 12) for relatively moving the detector (1) with respect to the workpiece (W) at a first speed (V i ); control means (4, 14) for producing a signal corresponding to an amount by which the detector (1) is moved with respect to the workpiece (W) and for causing said driving means (2, 12) to stop in accordance with said detecting signal; position detecting means (6, 16) for detecting the position of the detector (1); said control means (4, 14) further including timing signal generating means which generates a timing signal with a predetermined time period; gating means which produces a first stop signal synchronized with the timing signal from the first detecting signal generated by the detector (1) when it contacts with the workpiece (W) while moving at the first speed (V 1 ) characterized by command means which commands the driving means (2, 12) so that said detector (1) moves to a position closely near a contact position corresponding to the first detecting signal at a second speed (V 2 ) after the detector (1) stops in accordance with said first stop signal, and then which commands the driving means (2, 12) so that the detector (1) moves towards or away from the workpiece (W) at a third speed (V 3 ) smaller than said first (V 1 ) and second (V 2 ) speeds after reaching said position closely near the contact position at the second speed (V 2 ); and read out means for reading out the position of the detector (1) when another detecting signal is provided while the detector (1) moves at the third speed (V 3 ).
Claim 10
Dependent Claim
129 words
Apparatus for measuring a workpiece as in claim 7 wherein: said commanding means commands the driving means (2, 12) so that said detector (1) moves to a position closely near a contact position corresponding to the first detecting signal at a second speed (V 2 ) after the detector (1) stops in accordance with said first stop signal, and then commands the driving means (2, 12) so that the detector (1) moves towards the workpiece (W) at a third speed (V 3 ) smaller than said first (V 1 ) and second (V 2 ) speeds when another detecting signal is provided, so that the detector (1) is brought out of contact with the workpiece (W), before reaching said position closely near the contact position at the second speed.
Claim 11
Dependent Claim
71 words
Apparatus for measuring a workpiece as in claim 7 wherein: said control means (4, 14) further includes a memory area which stores data corresponding to the differences between commanding data given by said commanding means and the position data given by said position detecting means when said stop signal is produced, said stored data being supplied to said commanding means for causing the detector (1) to move at the second speed.
Claim 12
Dependent Claim
44 words
Apparatus for measuring a workpiece as in claim 7 wherein: said control means (4, 14) comprises a computerized numerical control device which produces a command data at each time period, said each time period corresponding to the time interval of said each timing signal.
Claim 13
Dependent Claim
84 words
Apparatus for measuring a workpiece as in claim 10 wherein: said numerical control device further includes a command register which accumulates the command data which are produced as a result of an interpolating operation in said numerical control device; a position register showing the position of the detector (1); and a difference register which stores the difference between the contents of said command register and the contents of said position register, the contents of said difference register being supplied to the driving means (2,12).
Claim 14
Dependent Claim
57 words
Apparatus for measuring a workpiece as in claim 7 or 11 wherein: said control means (4, 14) includes a memory which stores a data corresponding to the distance by which the detector (1) moves in a direction away from the workpiece (W) at the second speed after the detector (1) is stopped by the first stop signal.
References Cited (Backward Citations)
No citation records indexed.
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