Electronics Forum | Thu Nov 17 20:51:16 EST 2005 | cangly
Morning Mike, We use Pb63/Sn37, Alpha Metal alloy. Solder pot is at 250 C. The profile of board after Preheat about 100 C, Lambda Wave about 220C (use both Lambda and Chip wave), DWell time 2.1s ~ 3s. Conveyor speed 1.5 in/min. We run by bare board a
Electronics Forum | Sat Nov 26 05:55:04 EST 2005 | milroyperera
Hi, Does any body have the experience with wave soldering a "Gold" plated PCB with SMD assembled on it? I`m experiencing massive bridging,icicles,Shadowing & Skipping. The present soldering angle is 6 deg:,pre heating rate is 2 deg/sec , Dwell time
Electronics Forum | Wed Apr 19 04:41:42 EDT 2006 | ge_lim
Hi I am using selective soldering to dip soldering the connector pins to the PCB and would like to know your experience: a) Is there a recommended dip or dwell time for the dip soldering? b) How do we improve the solder coverage in the TH? c) How t
Electronics Forum | Wed May 03 21:20:23 EDT 2006 | mumtaz
I too use to run Ersa machines. The new engineer has gotten me kicked off them because I know more than he do. we operators are on the machines all day, so we know more than than the engineers. They may be good on the computers, but we now the mac
Electronics Forum | Thu May 18 11:27:36 EDT 2006 | patrickbruneel
I'm not on the production floor on a daily basis like the other guys here but here's my 2 cents: With a Ni/Au plating the inter-metallic that needs to be formed is Ni/Sn. Ni/Sn inter-metallic requires higher peak assembly temperature and a longer dwe
Electronics Forum | Mon Sep 25 16:31:41 EDT 2006 | SWAG
We are just getting into full production on a handful of lead-free builds. We are finding that the specific lead-free paste we are using is very susceptible to shelf life and dwell time. Much, much more than our experience with leaded. We have had
Electronics Forum | Mon Dec 11 15:26:20 EST 2006 | lrd116
Hello. Does anyone out there have any advice on optimizing a selective soldering process? We have a Pillarhouse fountain soldering machine new to our facility and as a Quality/Process Engineer, I am in charge of developing guidelines for board and
Electronics Forum | Sun Apr 15 18:06:16 EDT 2007 | greg york
You may need slightly longer dwell times and a little more heat in the reflow and wave to ensure proper alloying/wetting. Also consider if you are using a nickel doped and high copper alloy on bare boards in Leaded wave solder bath you will pick up c
Electronics Forum | Sat May 05 18:18:22 EDT 2007 | colormaker
I am using a Novastar 12S solder wave with Kester water soluable fux 22-2425. I have used this for years without problems on an old Hollis machine. Just started using the Novastar and after fine tuning I get itermitten bridging on the front of the P
Electronics Forum | Thu Jul 05 10:11:19 EDT 2007 | ck_the_flip
The variables to study: * Dwell Time * Contact Length * Conveyor Speed * Parallelism * Top-side Substrate Temperature Before wave * Solder Pot temperature All of these variables are inter-related (ie changing one variable will affect another)
