Electronics Forum | Thu May 23 10:29:15 EDT 2013 | emeto
We would usually have the bottom zones at the reflow with 10 degrees less than the top ones for the secondary side. This we proved helps to keep the parts of the primary side on the board.
Electronics Forum | Thu May 23 11:57:21 EDT 2013 | dyoungquist
We run the same profile for both sides. We also run the bottom temp 10C cooler in the final 2 heat zones.
Electronics Forum | Fri May 24 14:42:35 EDT 2013 | dilogic
Google for this: "weight_limit_qfn_smta.pdf" Although it is focused on QFN, formula can be used for most parts...
Electronics Forum | Thu Apr 26 07:41:14 EDT 2007 | d0min0
Hi there, in my factory we use profiling every temp. change or once per day others make 1 profile for machine per week what is safe in your oppinion to be sure that all products made are good :) or if 1 per week is enough how to prove it to bosses
Electronics Forum | Fri May 24 09:34:57 EDT 2013 | markhoch
I run the same profiles for Top and Bottomside assemblies for all of my products. Only in rare instances have I been forced to run a profile with cooler bottom zone settings. This was obviously driven by assemblies with heavier components on the bott
Electronics Forum | Thu May 03 15:48:56 EDT 2007 | geb
Hi, We run a profile check each time we load a recipe. This ensures that the correct settings have been used for the job. It also gives traceability in the event that you need to prove whether or not the oven temperature was the cause for failed pro
Electronics Forum | Thu Apr 26 08:34:32 EDT 2007 | ck_the_flip
Pavel is right...Your Quality Group, customers, and Management will really appreciate Cpk's. We do Cpk's annually, or whenever a major mechanical change (motor, blower, etc) is made. Pavel is correct in saying that Cpk's on most modern convection o
Electronics Forum | Fri May 24 19:18:03 EDT 2013 | hegemon
The formula is a great help, where was it 20 years ago? LOL After running a few thousand different products over the years, you start to get a feel for what is going to be trouble with regards to falling off the bottomside during the secondary refl
Electronics Forum | Thu Apr 26 08:27:30 EDT 2007 | ck_the_flip
If your product mix is similar in terms of thermal mass and componentry, find some standard setpoints (by doing a baseline profile) which will produce a thermal profile that's within the specs. of your solder paste and product. This approach usually
Electronics Forum | Fri Apr 27 11:01:36 EDT 2007 | pjc
Profiling is product specific. An instrument called the OvenRIDER from ECD is for soldering machine quality management. See link below. This instrument measures various parameters of your oven to include thermal transfer efficiency. The concept is,
