Electronics Forum | Mon Jul 29 19:21:58 EDT 2002 | davef
Look to: * Your flux supplier's recommendations to baseline your recipe [similar to using your paste supplier's recommendations for setting your reflow recipe] * 7530 'Guidelines for Temperature Profiling for Mass Soldering (Reflow and Wave)' for gui
Electronics Forum | Thu Jun 12 10:45:58 EDT 2003 | davem
I believe the Delta T you're referring to is the delta between the highest and lowest thermal mass components on the given assembly when being processed through reflow.
Electronics Forum | Fri Aug 27 15:00:42 EDT 2004 | davef
Dr Lee's book mentioned above is very good. Also consider: IPC-7530 - Guidelines for Temperature Profiling for Mass Soldering (Reflow and Wave)
Electronics Forum | Fri Mar 18 10:53:47 EST 2005 | bandjwet
Has anyone any experience with BGA reballing machines for mass volume reballing? Allegedly there was an article published within the last 2 years comparing the various machines.....does anyone have a copy? Bob Wettermann
Electronics Forum | Wed Jul 27 04:57:37 EDT 2005 | Base
because Kg is not a volume unit but a mass unit... (One would think that this sort of stuff is common knowledge in a tech industry... apparantly not...) Base (former science teacher... really!)
Electronics Forum | Wed Jul 27 08:33:38 EDT 2005 | siverts
1 Gallon (US)= 3.785412 liter (l). 1 Gallon (UK)= 4.546092 liter (l). Which one of them are You looking for? Why do need to convert from volume to mass?
Electronics Forum | Fri Aug 05 03:11:28 EDT 2005 | ajaydoshi
1. if you measure weight with same weighing scale it will be same irrestpective of temp / place. 2. But weight will be relatively different based on loaction if you compare from your present location. 3. if you check weight at moon respect to your lo
Electronics Forum | Mon Apr 24 14:04:44 EDT 2006 | pjc
You did not tell us where your boards fit on the thermal mass range. That is key. I've run Pb Free low to medium thermal mass boards with good results on a 5 zone oven (5 top/5 bottom). You should not have a problem running a medium thermal mass boa
Electronics Forum | Thu Oct 20 05:58:19 EDT 2005 | Slaine
Hi could be relaited to the thermal mass of the screw/bolt. if there is no intermatalic formed and the solder just picks off id say this is likely. the hot wave hits the cold screw and cools the solder enought to leave some behind??
Electronics Forum | Mon Nov 14 12:10:05 EST 2005 | davef
Ceramic capacitors larger then EIA size 1812 are known to be very susceptible to thermal shock damage due to their large ceramic mass.
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