Testing machine for head stack assembly piezoceramic micro-drive displacement

Abstract

The invention relates to a testing machine for head stack assembly piezoceramic micro-drive displacement. The testing machine comprises a frame, wherein a Doppler laser emission instrument and an industrial computer are arranged in the frame; a Doppler laser controller is arranged on one side at the upper part of the frame; a main hard disc head stack testing mechanism is arranged on the other side at the upper part of the frame and comprises a laser sensor probe positioning mechanism, an in-hard-disc read-write driving rack clamping mechanism and a test integrated support frame mechanism; and the laser sensor probe positioning mechanism and the in-hard-disc read-write driving rack clamping mechanism are both mounted on the test integrated support frame mechanism. The testing machine provided by the invention realizes head stack assembly graded micro-drive strength test of a hard disc read-write driver; the test response of the testing machine is nanoscale response of the single driving head; respective test of driving heads can be realized; the dynamic characteristic of the single read-write head can be distinguished; and in case of repair for micro-drive failure, the single read-write head in failure can be distinguished, thus avoiding mistaken kill of normal read-write heads and saving material cost.

Description

technical field [0001] The invention relates to a piezoelectric ceramic micro-drive displacement testing machine for a head stack assembly, which is used in the hard disk storage industry for electromechanical dynamic precision testing. Background technique [0002] The head stack assembly of the hard disk is a key component in the hard disk. Typical application track densities are on the order of 1 terabit per inch. With the increase of storage capacity and the improvement of tracking speed, higher dynamic characteristics requirements are put forward for read and write drives. Piezoelectric ceramic micro-drives are widely used in hard disks as a two-stage tracking servo system to improve tracking accuracy and meet the requirements of increasing storage capacity. [0003] The swing amplitude of the secondary drive is at the nanometer level, and it is necessary to evaluate the design and processing quality of the read-write drive to realize the test of the micro-drive ampli...

AI Technical Summary

Problems solved by technology

There are high requirements for the test environment and the use of disc accessories, which cannot meet the requirements of batch testing

[0009] In the hard disk industry, there is currently no equipment that can test the purely mechanical swing dynamic characteristics of a single head for the mass production of head stack components.

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