Abstract: A pulse generation unit generates a driving voltage signal including a pulse signal. A laser oscillation module oscillates a laser beam by carrying out, based on the driving voltage signal, a pulse oscillating operation. When the power command signal has a voltage command value corresponding to a laser power greater than a predetermined laser power during a high period, the pulse generation unit modulates, in a pulsed manner, a voltage value of the high period of the driving voltage signal so as to alternately repeat, for a preset period of time from a rising time of the high period of the driving voltage signal, a high state in which the voltage value is maintained and a low state in which the voltage value is lowered by a predetermined voltage value without being lowered to a voltage value of a low period of the driving voltage signal.

Abstract: A moving mechanism relatively moves a machining head that emits a laser beam from an opening of a nozzle with respect to a sheet metal along a surface of the sheet metal to produce a product having a predetermined shape by cutting the sheet metal. A beam vibration/displacement mechanism vibrates or displaces the laser beam with which the sheet metal is irradiated to produce the product while relatively moving the machining head by the moving mechanism. A moving mechanism control section controls the moving mechanism to relatively move the machining head with a first control period. The vibration/displacement control section controls the beam vibration/displacement mechanism to vibrate or displace the laser beam with a second control period shorter than the first control period.