Browse Prior Art Database

Non-Damaging Method of Gram Load Measuring

IP.com Disclosure Number: IPCOM000101920D
Original Publication Date: 1990-Sep-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 3 page(s) / 45K

Publishing Venue

IBM

Related People

Baasch, HJ: AUTHOR [+3]

Abstract

Described is a device which measures the force generated by the load beam of a Head Suspension Assembly (HSA). It does so by creating artificial surfaces similar to the actual HSA locating surfaces of a drive. The clamp assembly locating surface simulates the drive actuator locating surface. The load cell simulates the drive disk surface. (See Fig. 1.)

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Non-Damaging Method of Gram Load Measuring

       Described is a device which measures the force generated
by the load beam of a Head Suspension Assembly (HSA).  It does so by
creating artificial surfaces similar to the actual HSA locating
surfaces of a drive.  The clamp assembly locating surface simulates
the drive actuator locating surface.  The load cell simulates the
drive disk surface. (See Fig.  1.)

      Fig. 2 illustrates a HSA in the unloaded state (Fig. 2a) and in
the loaded state (Fig. 2b).  There appears to be a point about which
the outer portion of the HSA pivots. This is the apparent pivot
point.

      The clamp assembly pivot shaft is located in a position such
that when the HSA is located into the clamp assembly the two pivot
points are in the approximate same location. (See Fig. 3.)

      To make a measurement, the HSA is placed into the clamp
assembly, and the clamp assembly is rotated and loaded against the
load cell.  (See Fig. 4.)