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May 1999

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Subject:
Solder balls forming on top side during wave soldering.
From:
Virgil Lenton <[log in to unmask]>
Reply To:
[log in to unmask]
Date:
Thu, 13 May 1999 15:14:47 -0600
Content-Type:
TEXT/PLAIN
Parts/Attachments:
TEXT/PLAIN (48 lines) 
Hi
We are having a problem with solder balls forming around
and in mounting holes that have been spot masked. The
problem seems to have surfaced after upgrading our Hollis
wave machine to use an Electrovert Lambda Wave Solder pot.
Other than the Solder balls forming, soldering quality is
very good.

Any Suggestions would be appreciated.

Flux - RMA thinned to Manufacturer's recommendations.
Spot Mask - Tech Spray Water Washable
Solder Temperature(SN63) - 500F
Top Board Temp before solder pot - 200F

Thanks
Virgil

----------------------
Virgil Lenton - Manufacturing Engineering
SED Systems Inc   18 Innovation Boulevard
P.O. Box 1464    Saskatoon, SK    S7K 3P7
Ph. (306)931-3425       Fax (306)933-1486
Email:[log in to unmask]

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