Browse Prior Art Database

Graphics Plotter Modification to Provide Low Cost Robotics Capability

IP.com Disclosure Number: IPCOM000104233D
Original Publication Date: 1993-Mar-01
Included in the Prior Art Database: 2005-Mar-18
Document File: 2 page(s) / 67K

Publishing Venue

IBM

Related People

Covalt, TJ: AUTHOR [+6]

Abstract

Described is the modification to a graphics plotter to provide a precision hardware fault injection mechanism, capable of providing an economical means of test case application.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 58% of the total text.

Graphics Plotter Modification to Provide Low Cost Robotics Capability

      Described is the modification to a graphics plotter to provide
a precision hardware fault injection mechanism, capable of providing
an economical means of test case application.

      Manual (hand wired/applied) fault application cannot support
the accuracy, repeatability, and non-destructive requirements of
hardware fault testing on surface mount packaging.  The hand
application of faults to hardware circuit boards is tedious and error
prone at best.  The coverage required on planar boards and device
circuit nets is exhaustive and must provide error free results.  To
improve accuracy, repeatability, and efficiency, it was decided that
some form of precision robotics would be necessary to carry out the
required testing.  Robotics and gentry type systems were investigated
as a solution to the problems described above; however, the capital
investment was too high.  An ultra low-cost solution was required to
really satisfy needs.

      A graphics plotter with a GPIB interface offered X and Y
precision motion control on an interface already supported for
personal computers and systems.  A fault injection probe pointing up
(or away from the paper table) was installed and replaced the pin
mechanism which pointed down toward the paper table.  This gives the
plotter the ability to apply stuck faults to the circuit card nets on
the side opposite the components side of the card.

     ...