Servo controller

Abstract

A servo controller is provided wherein a switch is turned on by a learning control start command from a master control unit, and positional deviation at respective cycles is read in. Correction data read out from a learning memory is added to the positional deviation, and the result is filtered by a band limiting filter and then stored in the learning memory as correction data. The correction data read out from the memory is compensated for phase delay, fall in gain, and the like, by a dynamics compensating element, and is added to the positional deviation and input to a positional control section. When the command pattern for the same shape is completed, and a learning control end command is output, the switch is turned off and learning control terminates.

Description

technical field [0001] The present invention relates to a servo control device for driving a feed rod of a driving mechanism such as a machine tool, an injection molding machine stamping machine, etc., and particularly relates to a servo control device suitable for the occasions where the same part is continuously processed multiple times in a machine tool for part processing. control device. Background technique [0002] Learning control is known as a method for improving machining accuracy by converging control deviations to zero when machining is performed by repeatedly issuing the same pattern command. In the conventional learning control, as shown in Fig. 2, the same pattern command is repeatedly issued in a certain pattern cycle, and the correction data obtained from the position deviation in each control cycle in the previous pattern cycle is stored in the learning memory. In this method, the correction data of the corresponding control cycle in the previous mode cyc...

AI Technical Summary

Problems solved by technology

[0003] Like a plunger (piston) lathe, the cross-sectional shape is the same pattern. When the same pattern command is repeatedly executed, the above-mentioned learning control is applied, but when the same pattern is not repeatedly executed, this learning control cannot be applied.

[0004] In the case of continuous machining of multiple identical parts or the occasion of intermittent machining of the same machining shape multiple times, learning control cannot be applied even though the command used for the machining of the same shape is the same command pattern.

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