Browse Prior Art Database

Test Tool Block for 2 1/2-Inch Disk Drives

IP.com Disclosure Number: IPCOM000110473D
Original Publication Date: 1992-Nov-01
Included in the Prior Art Database: 2005-Mar-25
Document File: 1 page(s) / 46K

Publishing Venue

IBM

Related People

Balster, CH: AUTHOR

Abstract

A method of holding a tube arm and head suspension assembly (HSA) during fly height or mag test is disclosed. The Z height or vertical datum surface on the tube arm assembly is on the inside of the tube. Therefore, the datum surface of the tool block must slip inside the tube arm, and pressure must be applied in such a manner as to hold the datum of the tube arm in contact with the datum of the tool block.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 82% of the total text.

Test Tool Block for 2 1/2-Inch Disk Drives

      A method of holding a tube arm and head suspension assembly
(HSA) during fly height or mag test is disclosed.  The Z height or
vertical datum surface on the tube arm assembly is on the inside of
the tube.  Therefore, the datum surface of the tool block must slip
inside the tube arm, and pressure must be applied in such a manner as
to hold the datum of the tube arm in contact with the datum of the
tool block.

      The tool block is held in the open position, while an assembly
is loaded, by applying pressure upward and to the right with a finger
or thumb.  While in the open position, the HSA is slipped over the
mandrel.  The down or bottom side of the mandrel is the datum surface
for this plane of reference.  This corresponds to the definition of
the lower surface on the inside of the tube as being the datum.  As
thumb pressure is released, the leaf spring forces the clamp
mechanism to rotate about the pivot.  As the mechanism rotates, the
pin moves through the opening in the suspension.  As the mechanism
continues to rotate, it clears the bridge on the tool block frame,
thereby allowing the internal mechanism to begin to pull back.  This
motion is controlled by the compression spring, and forces the HSA
back against the datum.  As the mechanism continues to rotate, the
pressure foot makes contact with the suspension/tube, applying upward
force as supplied by the leaf spring.  This force holds the internal
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