Patent ID: 7092413

Claim:
A laser machining apparatus for performing laser machining by supplying a laser oscillator with a corrected laser output command obtained by multiplying an output command value by a correction coefficient, comprising: output power measuring means for measuring a laser output of the laser oscillator to obtain an actual output measured value; temperature measuring means for measuring temperature of an object of temperature control in the laser oscillator; storage means storing relational information on relation between a reference output command value and an actual output value of the laser oscillator measured at different temperatures when supplying the laser oscillator with the reference output command value; first updating means for updating the correction coefficient based on an actual output measured value obtained by said output power measuring means when the laser oscillator is started up with the reference output command value; correction value calculating means for calculating a correction value based on temperature measured when the laser oscillator is started up and the relational information stored in said storage means; and second updating means for updating the correction coefficient based on the relational information stored in said storage means, temperature measured by said temperature measuring means and the calculated correction value each time when the temperature is measured by said temperature measuring means after the laser oscillator is started up until the measured temperature reaches a predetermined value.