Electronics Forum | Tue Jul 10 04:23:55 EDT 2001 | winnifred
Dr Lee, What is the best recommended setting temperature for solder iron station? 350 deg C ?? The contact of iron with the pad/lead should be for about 2-3 sec, is that true ?
Electronics Forum | Tue Jul 20 02:36:03 EDT 2004 | yukim
Hi, The solder paste is SE5-M951X-9. Comparing with the previous one we used, we are having much more tombstoning problems. The reflow profile is such as: room temp to 140C: 85~95 sec 140 to 170 C: 80 sec 170 to 200 C: 20 ~ 23 sec Above 200 C: 44 ~
Electronics Forum | Tue Aug 22 18:15:50 EDT 2006 | russ
okay so both the 2005 formulas from interflux are clear alchol based fluxes. Yellow res huh? In looking at the temps here, I would say you might be too hot at both preheat and solder temp. You may be burning flux. How long is dwell time over wave
Electronics Forum | Sat Nov 04 20:17:25 EST 2000 | Greg G
Hi Guys, I'm sorry to ask you this, but I got mixed infos from the archive. I want to define a process in wave soldering regarding bd-wave interaction. Now "What's the required dwell Time of a lead in the solder bath?" Some says 3-5 secs is good, som
Electronics Forum | Mon May 03 11:20:43 EDT 2010 | mikesewell
A good guideline is keep it similar to your wave solder process, for example 2-3 sec. This assumes you're preheating the assembly. While polyimide boards are fairly robust at some point you will begin to see copper dissolution - the solder side pad
Electronics Forum | Fri May 07 16:24:08 EDT 2004 | bruce @ knoll
I did have my solder analyzed and it is clean. The Hollis preheat coils are a bit hard to control but I have measured the board top side and I am getting a temp of 105c just before wave contact. I would like to move to a spray fluxer but I am going
Electronics Forum | Thu Jun 14 04:20:26 EDT 2007 | sami
Dear ERhard.Our placer are Universal Genesis machines and the screen printer is DEK Horizon 02i . for Maian board the tact time in the placer is about 14 Sec and the printer is about 22 Sec. Means there is a big waste time . for Front pannel we are u
Electronics Forum | Tue Jun 19 11:27:07 EDT 2007 | realchunks
But his placement machine time was 13-14 seconds. That's the goal. "Our placer are Universal Genesis machines and the screen printer is DEK Horizon 02i . for Maian board the tact time in the placer is about 14 Sec and the printer is about 22 Sec.
Electronics Forum | Wed Nov 12 18:58:19 EST 2008 | joeherz
I attended SMTA's copper dissolution webinar this morning and am almost convinced that this is not our problem. Still planning to do cross sections to verify but our dwell times are nowhere near levels that could cause a problem assuming good platin
Electronics Forum | Wed Apr 14 20:48:43 EDT 2004 | Ken
Just a thought.... Some Fluxes require temperatures upto 260F (127C). Are you using water based flux or solvent (alcohol). I have noticed that many wave machines are NOT capable of preheating adequately when using water based materials. This can
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