Patent ID: 9720225
Date: 2017-08-01
CPC Classifications: G02B,G03F

Claim:
1. A processing system comprising: a laser beam source which generates a laser beam, a galvano scanner which comprises a mirror for reflecting said laser beam and a servo motor for rotating said mirror and which emits said laser beam to a workpiece, an operation control device which controls the operation of said servo motor in accordance with a sinusoidal drive command, a detector which detects an actual operation of said servo motor exclusive of the laser beam output, by detecting a position of a rotary encoder attached to the servo motor, an error calculation part which calculates an error between said drive command and the actual operation of said servo motor detected by said detector, a learning control part which generates a correction amount for correcting said error based on the error and a previous error calculated by the error calculation part, and a servo control part which controls operation of said servo motor based on said error after correction by said correction amount.