Servo motor control system

Abstract

All correction data is stored in the main memory of a numerical controller in advance. Of all correction data, the minimum data required for correction is transferred, for each interpolation cycle, to a built-in memory of a peripheral control LSI included in a servo control unit. A servo control processor performs repetitive control using the data transferred to the memory.

Description

technical field [0001] The invention relates to a servo motor control system. Background technique [0002] In machine tools such as multi-process automatic numerically controlled machine tools, there is repetitive control as a method for realizing high-speed and high-precision followability to repetitive commands. In the repetitive control, correction data is stored based on the position of the shape in the repeatedly instructed pattern, and the positional deviation is corrected according to the position, whereby the positional deviation can be reduced even if there is a speed fluctuation. The larger the correction data is, the longer the repetitive control can be performed. However, at present, a memory is installed around the servo control processor that executes the control to cope with it. [0003] In the numerical control device, as disclosed in Japanese Patent Application Laid-Open No. 9-69004, there are functional blocks such as a numerical control unit and a servo ...

AI Technical Summary

Problems solved by technology

However, due to cost and space constraints, it is limited to a memory that can be mounted on the periphery of the servo control processor, and the capacity of the memory that can be mounted on the periphery of the servo control processor is so small that it becomes a constraint on the time that the repetitive control can be performed.

Images