METHOD OF CORRECTING LASER BEAM OUTPUT POWER

摘要

A system for correcting laser output of a CNC laser machining apparatus in which a numerical controller (CNC) and a laser machining apparatus are coupled together. Corrective means (11) determines correction coefficients for making an instruction value of the laser output coincide with the actual laser output when the laser is started. The practical output is measured by an output measuring device (33) at predetermined time intervals and is controlled by instruction control means (13) such that the difference becomes zero between the corrected instruction value and the practical laser output. Long-term variation in the output is corrected when the laser output rises and short-term variation is corrected during the practical machining operation, so that the laser output is properly produced.