We a device called the Wave Solder Analyser, that measures contacttimes at several depths. Unfortunately we found out that the measurement variation was too high to use the data for SPC. What I mean is that if I changed the height setting of the solderpot in such a way that it had a dramatic effect on the soldering results, the measured contact-times were still within the variance of the original wave-settings. The SWA was not able to discriminate between an optimal wave setting and a very bad one ! 

The Electrovert-salesman told me that this was due to the nitrogen-interted wave (contour-system), which is less stable than the standard lambda-wave. He also told me that the newer measuring devices (like ECD's Waverider) are much accurate. Don't know if that's true or not, but my conclusion was the old-fashioned glassplate ain't so bad !

Daan Terstegge
SMT Centre
Thales Communications
Unclassified mail
Personal Website: http://www.smtinfo.net

  

>>> Alan Kreplick <[log in to unmask]> 10/05 1:16 pm >>>
On a daily basis, I'm using a Wave Solder Optimizer (made by Technology
Information Corporation) for measuring preheat and wave dynamics (height,
width, parallelism).

On a monthly basis, I'm using a Spray Flux Fixture (made by
Vitronics-Soltec) for measuring flux volume sprayed.

I (the operators) track both with SPC software.

If used and understood, both tools are extremely valuable.


Al Kreplick
Sr. Mfg. Eng.
Teradyne, Inc.
500 Riverpark Drive
North Reading, MA 01864
Tel: 978-370-1726
Fax: 734-661-5352




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Please respond to "TechNet E-Mail Forum." <[log in to unmask]>

To:   [log in to unmask] 
cc:
Subject:  [TN] SPC @ WAVE SOLDER


In regards to SPC at wavesolder. I would just like to here from some of the
people in this forum on what type of data they are collecting or sampling.
Any info is beneficial. Thanks.

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