US4937422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of correcting laser output power
Assignee: Fanuc Corp
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Filing: 1988-07-12
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Granted: 1990-06-26
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Expires: 2008-07-12
Abstract
Abstract There is disclosed a method of correcting the laser beam output power of an NC laser beam cutting machine composed of a computerized numerical control (CNC) apparatus and a laser beam cutting machine. When a laser is initially energized, a correcting coefficient is determined from a laser beam output power command value and an actual laser beam output power by a correcting means (11), and the actual laser beam output power is measured at each periodic interval of time by an output measuring device (33). The NC laser beam cutting machine is controlled by a command control means (13) to eliminate the difference between the laser beam output power command value and the actual laser beam output power. When the laser is initially energized, a long-term variation in the laser beam output power is corrected, and when an actual cutting operation is carried out, a short-term variation in the laser beam output power is corrected, so that the laser output power can be produced accurately.
Inventors
- 👤 Tsuyoshi Nagamine
- 👤 Etsuo Yamazaki
- 👤 Mitsuo Kinoshita
- 👤 Nobuaki Iehisa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:14
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/10; H01S3/13; H01S3/131; H01S3/134; B; B23; B23K; B23K26/00; B23K26/70; B23K26/702; B23K26/705; G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/404; G05B2219/00; G05B2219/30; G05B2219/45; G05B2219/45165; G05B2219/49; G05B2219/49353
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
112 words
A method of correcting the laser beam output power of a CNC laser beam cutting machine composed of a computerized numerical control (CNC) apparatus and a laser beam cutting machine, comprising the steps of: measuring an actual laser beam output power with an output measuring device with respect to a laser beam output power command value when a laser is initially energized; determining a correcting coefficient from said laser beam output power command value and said actual laser beam output power; and controlling the CNC laser beam cutting machine to produce a laser beam output power equal to the command value by referring to the correcting coefficient in an actual cutting operation.
Claim 2
Independent Claim
112 words
A method of correcting the laser beam output power of a CNC laser beam cutting machine composed of a computerized numerical control (CNC) apparatus and a laser beam cutting machine, comprising the steps of: measuring an actual laser beam output power with an output measuring device with respect to a laser beam output power command value when a laser is initially energized; determining a correcting coefficient from said laser beam output power command value and said actual laser beam output power; and controlling the CNC laser beam cutting machine to produce a laser beam output power equal to the command value by referring to the correcting coefficient in an actual cutting operation.
Claim 3
Dependent Claim
26 words
A method according to claim 1, wherein a plurality of correcting coefficients are employed with respect to the respective numbers of laser tubes to be used.
Claim 4
Dependent Claim
23 words
A method according to claim 1, wherein said correcting coefficient is determined for each of ranges of laser beam output power command values.
Claim 5
Dependent Claim
31 words
A method according to claim 1, wherein an alarm indication is displayed and operation of the CNC laser beam cutting machine is stopped when said correcting coefficient exceeds a limit value.
Claim 6
Independent Claim
84 words
A method of correcting the laser beam output power of a CNC laser beam cutting machine composed of a computerized numerical control (CNC) apparatus and a laser beam cutting machine, comprising the steps of: measuring an actual laser beam output power at each periodic interval of time with respect to a laser beam output power command value; and controlling the CNC laser beam cutting machine to eliminate the difference between said laser beam output power command value and said actual laser beam output power.
Claim 7
Independent Claim
84 words
A method of correcting the laser beam output power of a CNC laser beam cutting machine composed of a computerized numerical control (CNC) apparatus and a laser beam cutting machine, comprising the steps of: measuring an actual laser beam output power at each periodic interval of time with respect to a laser beam output power command value; and controlling the CNC laser beam cutting machine to eliminate the difference between said laser beam output power command value and said actual laser beam output power.
Claim 8
Dependent Claim
40 words
A method according to claim 5, wherein an alarm indication is displayed and operation of the CNC laser beam cutting machine is stopped when said difference exceeds a predetermined value with respect to said laser beam output power command value.
Claim 9
Independent Claim
158 words
A method of correcting the laser beam output power of a CNC laser beam cutting machine composed of a computerized numerical control (CNC) apparatus and a laser beam cutting machine, comprising the steps of: measuring an actual laser beam output power with an output measuring device with respect to a laser beam output power command value when a laser is initially energized; determining a correcting coefficient from said laser beam output power command value and said actual laser beam output power; correcting said laser beam output power command value to produce a laser beam output power equal to the command value by referring to the correcting coefficient in an actual cutting operation; measuring the actual laser beam output power at each periodic interval of time with an output measuring device; and controlling the CNC laser beam cutting machine to eliminate the difference between said corrected laser beam output power command value and said actual laser beam output power.
Claim 10
Independent Claim
158 words
A method of correcting the laser beam output power of a CNC laser beam cutting machine composed of a computerized numerical control (CNC) apparatus and a laser beam cutting machine, comprising the steps of: measuring an actual laser beam output power with an output measuring device with respect to a laser beam output power command value when a laser is initially energized; determining a correcting coefficient from said laser beam output power command value and said actual laser beam output power; correcting said laser beam output power command value to produce a laser beam output power equal to the command value by referring to the correcting coefficient in an actual cutting operation; measuring the actual laser beam output power at each periodic interval of time with an output measuring device; and controlling the CNC laser beam cutting machine to eliminate the difference between said corrected laser beam output power command value and said actual laser beam output power.
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| 3.5 Years (Year 4) | 1993-06-25 | 1993-12-25 | 1994-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-25 | 1997-12-25 | 1998-06-26 | $3760.00 | Window Closed / Lapsed |
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