47307re: [SeattleRobotics] SMT toaster oven problems
- Oct 24, 2012Peter,
Have you seen the Sparkfun tutorials on reflow soldering? Here's their one on paste stenciling. http://www.sparkfun.com/tutorials/58
It talks a lot about solder paste and the aging issues from their perspective.
I'm currently building a "skillet" version using a hot plate. Instructables has a great article on that.
I want to add an IR element that will move over the top on a track so I can use the skillet for only the preheat and the IR for the reflow.
From: "Peter Balch" <peterbalch@...>
Sent: Wednesday, October 24, 2012 9:50 AM
Subject: [SeattleRobotics] SMT toaster oven problems
Whe I first tried SMT soldering user a toaster oven it worked wonderfully.
But now it doesn't. Most of the solder more-or-less melts and the components
are stuck down but there's a lot of grey goo (i.e. solder paste) left on the
pcb near to the pads.
I'm pretty sure I 'm using the same I'm using the same temperature profile -
it's the same oven and it doesn't have any sort of temperature control. It's
the same solder paste. So what's going wrong?
Am I seeing an effect of the solder paste ageing? I've kept it in the fridge
as one is supposed to but it is now a few months old.
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