Mike,

Standardized hole spacing and hole diameter relative to lead diameter is
essential for good operation on a CS400.  These changes have made a huge
difference in our assembly operation.

Phil Nutting

-----Original Message-----
From: Mike Sewell [mailto:[log in to unmask]]
Sent: Thursday, September 28, 2000 4:57 PM
To: [log in to unmask]
Subject: Re: [TN] Lead Clinching over soldermask


We have gone to a partial clinch already... and shortened lead protrusion to
~ 50 thou. this has helped but hasn't eliminated the problem.  I think we'
may be bending leads during handling as this board goes through axial,
CS400,
masking, hand stuff after DIP and prior to wave.  Plus we still have the
axial & CS400 parts that may get clinched towards a trace - we've tried to
tweak to partial clinches there as well. 600 - 700 parts on the board
THOUSANDS of leads, poor spacing, undersized holes/oversized parts, another
board where DFM wasn't exercised...

- Mike -

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