Laser machining apparatus

Details Laser machining apparatus Laser machining apparatus

2006-08-15

2006-08-15

Rodriguez, Armando (Department: 2828)

Coherent light generators

Particular beam control device

C372S033000, C372S034000, C372S029010

Reexamination Certificate

active

07092413

ABSTRACT:
A laser machining apparatus in which laser output can be easily corrected in view of secular change of components of the laser machining apparatus and influence of temperature. Output values of a laser oscillator operated according to a reference laser output command value Psc are stored as reference output values P(θ) at different temperatures θ in a table TB1. When the laser oscillator is started up, a measured output value Pr of the laser oscillator supplied with the reference command value Psc is obtained, and a new correction coefficient k is obtained to replace an old one. From a reference output value P(θ) at a temperature at that time and the actual output measured value Pr, a correction value ΔP is obtained and stored. Each time temperature θ is measured, a reference output value (Pθ) at a measured temperature θ is obtained from the table TB1, an estimated output value Pa is obtained by subtracting the correction value ΔP from the reference output value (Pθ), and a new correction coefficient k is obtained to replace an old one. In other words, an output value at a different temperature is estimated on the basis of the correction value ΔP obtained when the laser oscillator is started up, and a new correction coefficient k is obtained to replace an old one. When the temperature reaches a predetermined temperature, a new final correction coefficient k is obtained on the basis of the reference command value and a measured output value to replace an old one.

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EP Search Report for corresponding EP Application No. 04 25 2591 mailed Sep. 10, 2004.

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