Electronics Forum | Fri Nov 24 01:12:28 EST 2000 | SARRY
Hello! All I am an almost smt biginner. I have a few questions My question is 1. what will be changed to use lead free solder paste in a smt production line? 2. what is the reflow profile for lead free solder paste? Don't just tell me to search th
Electronics Forum | Tue Feb 19 10:50:13 EST 2019 | rgduval
Call Heller directly, and give them the oven, and relative thermal density of the board, as well as the solder paste that you're using. They'll be able to give you a baseline profile to start from (both RTS and RSS). Otherwise, use a thermocouple p
Electronics Forum | Thu Oct 26 14:51:46 EDT 2000 | eramirez
Currently I am running a very dense PCBA using a PCB less than 20 mils thick. We have two facilities running this product. One is using Nitrogen during reflow one is not. What is the advantage and disadvantages of using Nitrogen during the reflow
Electronics Forum | Thu Aug 24 08:59:38 EDT 2000 | Eugene Smelik
Dr. Lee, For Pb-free solders, will the reflow profile be similar to that of Sn/Pb, with an flux activation plateau before going to peak reflow, or will the profile be more linear in nature? Are there advantages/disadvantages to either profile for P
Electronics Forum | Tue Feb 09 11:23:25 EST 1999 | michele sommaruga
I would like to have information about the processability of different packages. In particular I would like to known for which package I can use a double reflow for soldering. Best Regards
Electronics Forum | Tue Feb 19 08:41:02 EST 2019 | prasanth
dear experts, i want your suggestion for getting a profile in Heller 1707 mk iii series re-flow machine ,its 7 zone machine recently we had a solder ability issues , so pls guide me ,how to set rts profile parameters
Electronics Forum | Tue Mar 23 16:20:54 EDT 2021 | grahamcooper22
Hi, just wondering are many assemblers using vacuum reflow systems, whether they be forced air based or vapour phase type ? If so, anyone seeing any negatives caused by the vacuum with regards liquid solder being 'sucked' away from the joints in the
Electronics Forum | Wed Sep 26 14:48:01 EDT 2001 | bobm
there is a company called EFD. my contact there is john kaminski. they have thermocouples that are spring loaded requiring no solder at all. they work great. you attach them to the edge of the board and you can move the end to make contact where you
Electronics Forum | Wed Sep 17 07:39:13 EDT 2003 | davef
As we recall, they attached something like a placement vib head to the rails. The problem, as you stated, was isolating the board from the vibrating rails during cooling of the solder connection.
Electronics Forum | Mon Sep 22 13:18:59 EDT 2003 | pjc
I remember reading something about that a while back. The paper said vibration created a higher percentage of voids in solder joints.
