Abstract: A fiber laser oscillator includes a housing that accommodates an optical unit such that the optical unit is able to be drawn out of the housing; and a clean bench that is detachable to a side of the optical unit, and defines a closed space which is isolated from outside, in which a communication opening that is in communication with an internal space of the housing is defined in the clean bench.

Abstract: To provide a clean bench that can prevent failure of optical components due to intrusion of dust and moisture, and enables to perform maintenance replacement of the optical unit, verification processes after replacement, etc. favorably, and a laser fiber oscillator mounting the same. A laser fiber oscillator includes a housing that accommodates an optical unit to be able to be drawn out; and a clean bench that is detachable to a side of the optical unit, and forms a closed space which is isolated from outside, above the optical unit that has been drawn out from the housing, in which a communication opening that is in communication with an internal space of the housing is formed in the clean bench.

Abstract: A spindle acceleration/deceleration controlling method in a numerical control unit comprising a spindle control section for controlling a spindle motor and a servo axis controlling section for controlling a servo axis motor, and for synchronously controlling the spindle and servo axis; wherein a spindle motor in the position loop control state is controlled with an acceleration/deceleration pattern similar to that of the spindle motor in the velocity loop control state.