Browse Prior Art Database

Quick Set-Up Precision Hardware Mounting Fixture

IP.com Disclosure Number: IPCOM000104196D
Original Publication Date: 1993-Mar-01
Included in the Prior Art Database: 2005-Mar-18
Document File: 2 page(s) / 85K

Publishing Venue

IBM

Related People

Covalt, TJ: AUTHOR [+6]

Abstract

The manual positioning of a card, over a robot probing bed, was eliminated by a well designed fixture. A frame was designed to allow receiving of a generic card/device mounting plate. A card holder was designed to use the CAD/CAM positioning holes of the card under test. The result was the quick set up of a card under test over the old method of manually moving the card until registration was correct. The innovation of the fixture is very important to reducing set up time.

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Quick Set-Up Precision Hardware Mounting Fixture

      The manual positioning of a card, over a robot probing bed, was
eliminated by a well designed fixture.  A frame was designed to allow
receiving of a generic card/device mounting plate.  A card holder was
designed to use the CAD/CAM positioning holes of the card under test.
The result was the quick set up of a card under test over the old
method of manually moving the card until registration was correct.
The innovation of the fixture is very important to reducing set up
time.

      While production/manufacturing card testers exist in many
forms, the "in card" testing required for serviceability verification
was not supported.  Several means of robotic error injection have
been identified, with a modified Hewlett-Packard (H-P) plotter design
selected as the method that most clearly met our test requirements.
Using the plotter implementation, a method of securely locating the
card under test with relation to the plotter was required.

      Several seemingly impossible requirements were outlined for the
device/card mounting fixture:

o   Precision positioning with relation to the H-P plotter (X, Y, and
    Z axes and a "Home" position)

o   Precision positioning with relation to the card/device under test
    (X, Y, and Z axes and a "Home" position)

o   Common set-up: plotter and card/device exchanges are anticipated

o   Quick set-up: changes of the card or device under test quickly
    with minimal/no re-calibration required

o   Economical, efficient retool to support new card/devices under
    test

      The business/process requirements of commonality, efficiency,
and low cost were used as implementation boundaries as we developed
the solutions for the positioning requirements for both the H-P
plotter and the card/device under test.

      First, a precision foundation was designed, built, and
permanently mounted...