Learning servo controller

Abstract

In response to a learning control start- command from an external apparatus, an input switch for inputting a position deviation to learning control means and an output switch for outputting correction data from the learning control means are turned on, respectively, so that a position deviation is captured for each period. The position deviation is added to correction data fetched from a learning memory, and the result is stored as correction data in the learning memory. On the other hand, a value obtained by compensating the correction data fetched from the learning memory with a dynamic characteristic compensation element is added to the position deviation, and the result is inputted to a position control section. When a learning control end command is issued after the termination of a command pattern for an identical shape, the input switch and output switch are turned off, respectively.

Description

technical field [0001] The present invention relates to a servo control device for driving the feed shaft and the rotating shaft of driving machines such as machine tools, injection molding machines, punching machines, etc., and particularly relates to a situation that is suitable for multiple processing of the same part on a machine tool for part processing servo control device. Background technique [0002] In the case of repeatedly issuing the same pattern (pattern) command to perform machining, etc., learning control is already known as a method of converging the control deviation to near zero and improving machining accuracy. The existing learning controls such as figure 2 As shown, the command of the same mode is issued repeatedly in a certain period, and the correction data obtained according to the position deviation of each control period of the previous mode period is stored in the learning memory. The deviation is added to the correction data corresponding to th...

AI Technical Summary

Problems solved by technology

[0003] As with a piston lathe, when the cross-sectional shape is the same pattern and the command of the same pattern is repeatedly executed, the above-mentioned learning control is applied, but when the same pattern is not repeatedly executed, the learning control is not applicable.

[0004] When several identical parts are machined continuously or when the same machined shape must be machined several times intermittently, the learning control is not applicable even though the command is the same command pattern because the same shape is machined.

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