Browse Prior Art Database

Anti-Shingling Slide Feeder Part Acquisition Strategy

IP.com Disclosure Number: IPCOM000115689D
Original Publication Date: 1995-Jun-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 4 page(s) / 62K

Publishing Venue

IBM

Related People

Sack, TA: AUTHOR

Abstract

Slide feeders are commonly used to present odd-shaped or heavy components to a robot or part placement machine for pickup. Slide feeders use gravity to move parts along its track to get another ready for pickup once a part has been removed from the bottom of the stack (Fig. 1).

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 71% of the total text.

Anti-Shingling Slide Feeder Part Acquisition Strategy

      Slide feeders are commonly used to present odd-shaped or heavy
components to a robot or part placement machine for pickup.  Slide
feeders use gravity to move parts along its track to get another
ready for pickup once a part has been removed from the bottom of the
stack (Fig. 1).

      What commonly happens however, as parts are removed from the
feeder, is something called shingling.  Shingling is the result of
the process where the second part in the feeder wedges itself under
the first part, lifting or tilting it out of position, making
subsequent pickup operations impossible.  Shingling always occurs
immediately after a part is picked up.  The gap created by the
removed part is filled by the parts left in the feeder.  As the parts
slide down the track the first part hits the end stop of the feeder
with its front end coming to an abrupt stop while causing the back
end to lift slightly.  The inertia of the remaining parts is often
sufficient to cause the second part to wedge under the first just as
its back end is lifting (Fig. 2).

      This problem has traditionally been solved using elaborate
electro-mechanical hold/release mechanisms which index parts down the
slide feeder one at a time.  A new technique has been developed which
uses only software and can be applied to any existing slide feeder
design.  This technique simplifies the complexity of the slide feeder
design since it eliminates...