Automated gram load testing system for a head stack assembly

Details Automated gram load testing system for a head stack assembly Automated gram load testing system for a head stack assembly

1996-01-11

1997-06-10

Dougherty, Elizabeth L.

Measuring and testing

Dynamometers

Responsive to force

G01L 100

Patent

active

056378076

ABSTRACT:
An automated system for measuring gram load in a head suspension arm of a disk drive. The system is utilized during the assembly of a disk drive, and is operated in an automated mode without requiring manual assistance. The system includes an apparatus for placing each suspension arm into position to measure the gram force, a controller for driving the apparatus in an automated mode, an instrument for measuring the gram load of each suspension arm, and a computer for storing data from the measuring instrument. The apparatus includes a plurality of vertically-aligned cam pins which meshably engage the plurality of vertically-aligned suspension arms. Each of the cam pins separates a pair of adjacent arms and includes an end defined by a semi-circular cross-section. As each cam pin is rotated by servo motors, each arm is placed into a preloaded biased state, enabling the measuring means to measure its gram load. The process of measuring each suspension arm is executed in an automated mode which significantly reduces operator involvement.

REFERENCES:
patent: 4535374 (1985-08-01), Anderson et al.
patent: 4661873 (1987-04-01), Schulze
patent: 4703376 (1987-10-01), Edwards et al.
patent: 4787000 (1988-11-01), Schulze
patent: 5023737 (1991-06-01), Yaeger
patent: 5341689 (1994-08-01), Freudenberger
patent: 5476015 (1995-12-01), Valent

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