US5221884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Numerical control apparatus
Assignee: Mitsubishi Electric Corp
•
Filing: 1990-11-20
•
Granted: 1993-06-22
•
Expires: 2010-11-20
Abstract
Abstract The operation of positioning a machine by a numerical control apparatus is completed when it is determined that a current feedback value of a motor, which varies in response to deflection of the machine, is in a given range.
Inventors
- 👤 Takeo Teshima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:13
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/401; G05B19/4015; G05B2219/00; G05B2219/30; G05B2219/37; G05B2219/37285; G05B2219/42; G05B2219/42062; G05B2219/50; G05B2219/50043
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
118 words
A numerical control method for determining whether a positioning operation of a machine has been completed, said method comprising: (a) receiving machining information for a block of a machining program to be executed; (b) interpolating the machining information for the block; (c) determining whether an in-position check is to be performed for the machining information; (d) receiving a current feedback value when the in-position check is to be performed; (e) determining whether the current feedback value is within a given range; and (f) completing the position operation of the machine when the current feedback valve is determined to be within the given range, by repeating steps (a)-(e) until all the blocks of the machining program have been executed.
Claim 2
Dependent Claim
118 words
A numerical control method for determining whether a positioning operation of a machine has been completed, said method comprising: (a) receiving machining information for a block of a machining program to be executed; (b) interpolating the machining information for the block; (c) determining whether an in-position check is to be performed for the machining information; (d) receiving a current feedback value when the in-position check is to be performed; (e) determining whether the current feedback value is within a given range; and (f) completing the position operation of the machine when the current feedback valve is determined to be within the given range, by repeating steps (a)-(e) until all the blocks of the machining program have been executed.
Claim 3
Dependent Claim
26 words
A method as recited in claim 1, wherein said method further comprises: (g) completing the positioning operation when the in-position check is not to be performed.
Claim 4
Dependent Claim
61 words
A method as recited in claim 1, wherein said method further comprises, between steps (c) and (d), the steps of: (g) waiting until an output of an acceleration/deceleration process unit is zero when the in-position check is to be performed; (h) obtaining a position droop of a servomotor; and (i) waiting until the position droop is within a given in-position range.
Claim 5
Dependent Claim
58 words
A method as recited in claim 1, wherein said method further comprises the steps of: (j) counting up a count value each time step (e) determines that the current feedback value is not within the given range; and (i) outputting an abnormality indication signal and not completing the positioning operation when the count value exceeds a predetermined value.
Claim 6
Dependent Claim
82 words
A numerical control method for determining whether a positioning operation of a machine has been completed, said method comprising: (a) receiving machining information for a machining operation to be performed; (b) interpolating the machining information; (c) determining whether an in-position check is to be performed for the machining information; (d) receiving a current feedback value when the in-position check is to be performed; (e) determining that the positioning operation has been completed when the current feedback value is within a given range.
Claim 7
Dependent Claim
82 words
A numerical control method for determining whether a positioning operation of a machine has been completed, said method comprising: (a) receiving machining information for a machining operation to be performed; (b) interpolating the machining information; (c) determining whether an in-position check is to be performed for the machining information; (d) receiving a current feedback value when the in-position check is to be performed; (e) determining that the positioning operation has been completed when the current feedback value is within a given range.
Claim 8
Dependent Claim
43 words
A method as recited in claim 1, wherein said method further comprises: (f) outputting an abnormal signal and not completing the positioning operation when the current feedback value is determined not to be within the given range after a predetermined period of time.
Claim 9
Dependent Claim
21 words
A method as recited in claim 1, wherein the current feedback value corresponds to a positioning error due to machine deflection.
Claim 10
Dependent Claim
21 words
A method as recited in claim 1, wherein the current feedback value corresponds to a positioning error due to machine deflection.
References Cited (Backward Citations)
DE3151830A1
Cited
JPS5896307A
Cited
US4707780A
Cited
US4859920A
Cited
US4885515A
Cited
JPS63155205A
Cited
US4941104A
Cited
US4992715A
Cited
US4970448A
Cited
US4961034A
Cited
US4988935A
Cited
US5057759A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-06-21 | 1996-12-21 | 1997-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-21 | 2000-12-21 | 2001-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-21 | 2004-12-21 | 2005-06-22 | $7700.00 | Window Closed / Lapsed |