NUMERICAL CONTROL SYSTEM AND POSITION COMMAND VALUE CORRECTION DEVICE TO BE USED FOR THE SYSTEM

摘要

PROBLEM TO BE SOLVED: To solve a problem that the variation of lost motion due to a secular change or a temperature change in a drive transmission system for direct operation guide or the like can not be suitably corrected by simple setting in a conventional position command value correction device because a position command correction value for correcting the lost motion is a fixed value or an inference value based on a multi-layer neural net. SOLUTION: The quantity of friction corresponding to the position of a table 1 is stored in a storage means 8 and correction quantity on an inverting position is calculated on the basis of the stored frictional quantity. The stored contents of the storage means 8 are updated.