ROLLER WORKING METHOD, AND ROLLER WORKING APPARATUS

摘要

A laser beam (21), which is outputted by a laser oscillator (3), is focused by a working head (4), thereby to irradiate the surface of a roller (2) with itself. An encoder (5c) outputs a signal according to the rotational position of the roller (2). On the basis of the output signal of the encoder (5c), a control unit (24) controls the laser oscillator (3) so that a recess may be formed by repeating such operations a plurality of times as to irradiate an identical portion of the surface of the roller (2) with the laser beam (21) at each rotation of the roller (2).