Rob:
     Dover Soltec has a center wire support on their new Delta wave solder 
     system which will allow processing of boards through the wave without 
     fixturing.  I have processed boards at Soltec labs up to 18" wide with 
     only a stiffner and this center support wire.  We also processed 
     boards with large bottom side tantalum capacitors, chip resistors and 
     capacitors, and two SOICS which were mounted 90 degress off from 
     optimum.  We ran the boards to accomodate the SOICS from bridging and 
     because of the chip wave, smart wave and main wave 
     configuration/design we had a zero defect board.  I believe others, 
     Electrovert and SEHO, have the center support wire as well.  I have 
     experience with only Soltec.  We purchased one of their new Delta Wave 
     Systems.
     
     [log in to unmask]
     
     RON


______________________________ Reply Separator _________________________________
Subject: Wave Solder
Author:  <[log in to unmask]> at INTERNET
Date:    6/27/97 2:09 PM


Thanks for the info on profiling pcb's.  It helped me confirm that the process 
of profiling that I am using is typical.  Another question, I am being 
approached to figure out a way to run pcb's through the solder wave that have 
widths of 8" or greater without titanium stiffeners or pallets.  I don't believe
it can be accomplished from my personal experience.  There will always be bowing
of the board through the solder wave process.  Due to the bowing of the board, 
the speed of the waves would have to be lowered.  By doing this,  smt parts on 
the bottom side along the conveyor edges would have quite a few of no solders. 
Any help in this area would be appreciated.
     
Rob
     
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