Electronics Forum | Thu Nov 11 19:23:33 EST 1999 | Dave F
Gary: Sounds like the spacing between each pad for the component are too far apart. My 2�. Dave F
Electronics Forum | Wed Aug 28 19:35:13 EDT 2002 | ppwlee
Hi, Does anyone have guidelines on minimum SMT component spacing for bottom sided wave soldering? I am looking for general rule of thumb in wave soldering bottom side SOTs, 0805 & 0603s. How about minimum through-hole lead to pad distance? Peter
Electronics Forum | Wed Aug 28 19:36:29 EDT 2002 | ppwlee
Hi, Does anyone have guidelines on minimum SMT component spacing for bottom sided wave soldering? I am looking for general rule of thumb in wave soldering bottom side SOTs, 0805 & 0603s. How about minimum through-hole lead to pad distance? Peter
Electronics Forum | Thu Sep 12 18:54:21 EDT 2002 | scottefiske
PTH to SMT spacing should be 80-100 thous. any closer will result in bridging. Scott
Electronics Forum | Fri Aug 30 16:47:56 EDT 2002 | davef
Ooops, sorry Peter. [Those pesky decimal points.] I meant to say �150-200 thou�. There is a fair amount of 'Kentucky Windage' in this due to: * Height of the component and the down-stream spacing. * Chip wave capabilities.
Electronics Forum | Tue Mar 01 14:47:48 EST 2005 | cabjerk
Hi: We started many years ago with totes on shelves 30 reels per side. Then we moved to 12" shelving with reel boxes. 5 reels per box. It was cheap and each was a single location. Great for finding and decrease cycle time in finding parts. Our wh
Electronics Forum | Thu Aug 29 20:34:02 EDT 2002 | ppwlee
A gap of 150-200� between potential shadow components is enough to eliminate those problems. Dave, Can you clarify? Do you mean 0.015 to 0.02?? Peter
Electronics Forum | Thu Aug 29 20:01:23 EDT 2002 | davef
Many people use the same spacing [and pad designs] as they use for primary side SMT. We don�t. DOWN STREAM SMT-TO-SMT SPACING: In addition to proper orientation, components cannot be immediately upstream of terminations that are to be soldered or b
Electronics Forum | Tue Feb 27 20:53:10 EST 2007 | davef
We'll guarantee the two pads are too close together. The proper spacing depends on the orientation of the parts to the wave. * Do the pads hit the wave at the same time? * Does one pad hit the wave before the other? If so, which? * How does the 06
Electronics Forum | Mon Jul 18 12:24:53 EDT 2016 | oleksz
Some people involved in PCB assembly process claim that SMD components reflow soldering problems are often caused by traces running under a component. According to this claim, trace (or any copper) covered by solder mask and placed under SMD componen
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