Electronics Forum: 20c and 245 (Page 1 of 2)

Re: When? How and What??

Electronics Forum | Tue Aug 22 10:47:28 EDT 2000 | Dr. Ning-Cheng Lee

The European WEEE has issued a new (5th) version of its recommendations. In it they say that , on January 1st, 2004, they will review the status of the Pb-Free issue. There is currently NO DEADLINE for implementation. As far as a direct replacemen

Leaded and Lead-Free Wave Parameters

Electronics Forum | Wed May 21 13:59:19 EDT 2008 | pjc

Here's what I've seen for no-clean flux applications: Leaded: Dwell Time is? 2 - 3 seconds Top side board temp max? If some small SMT parts reflow are we too hot? 110 to 120C top side board temp just before hitting the wave(s) Pot temp. 245C Lea

Time and temp in lead and lead-free reflow

Electronics Forum | Fri Jul 25 15:54:22 EDT 2008 | pcbbuilders

I am trying to optimize my reflow profile. i have a 5 zone oven. lead-free: for the 1st 3 zones, i am good, at about 150-200 deg for 150 seconds. during the 4th zone, i am at a temp of 200-220 for 50 seconds. during the 5th zone, i am at 220-245 f

Working with Lead free and Pb Capacitors

Electronics Forum | Fri Jan 27 17:23:10 EST 2006 | muse95

Watch the solder profiles allowed for these caps. Most electrolytics cannot withstand high heat. Even RoHS compliant Electrolytics are often rated for peak 245C, 3 secs max, for example. Nowhere close to the 260C 10-20 sec you usually like to see.

Puzzling CSM84VZ errors, #118 and #120

Electronics Forum | Mon Nov 07 15:05:16 EST 2011 | tpappano

Hi Jeff, This machine (my unit #2) has a couple programs that execute just fine, but when I added additional mounts to one of them I got the "120"error. When I added another new program, the "118" error showed up, and of course, everything in all t

Re: Discoloring of Soldermask and silkscreen

Electronics Forum | Mon Apr 19 20:49:13 EDT 1999 | Dave F

| Netters, | | When I reflow a PCB there is a discoloration of silkscreen and mask. It appears if Profile is too hot! But I dont think so, maybe I'm wrong? | | 1. Kester 293 no clean | 2. 2.1 C/s for 30s to 150 C | 3. .5 - .7 C/s for 60s to 185

Foam fluxer maintenance, storage and cleaning

Electronics Forum | Mon Nov 09 09:44:22 EST 2015 | davef

Purpose. This describes setting-up a wave soldering system set-up for a new assembly design or checking a wave solder machine operation with a test board. Applicability. To be used for new design printed circuit assembles and during machine accept

Lead-free and Leaded solder in the same reflow

Electronics Forum | Tue Jan 31 12:13:26 EST 2006 | Calvin Kolokoy

Today's regular Sn-Pb paste chemistries are designed to run at higher peak temperatures ensuring that your lead-free alloys will coalesce with your regular Sn-Pb solder. That being said, it is do-able to solder both types in one oven. Generally, wit

Reflow Temperatures and speed for a 7 zone top/bot for conceptro

Electronics Forum | Mon Jun 16 13:57:48 EDT 2003 | James

Could anyone give me a basic profile temperature settings for a conceptronics 7 zone oven and speed? I have the first couple of zones ramped up to get to the soak temperatures. Is this correct or should I start out with low temperatures and graduall

Gold plated board, with csp's and 0603 with no clean apetures

Electronics Forum | Wed Oct 02 18:18:58 EDT 2002 | davef

The steadfast rule of thumb is: In order to get reliable reflow, you need to be at or higher than [liquidus + 20�C] for about 5 to 10 seconds, rather than those old "60 seconds above 183�C" guideline. This provides for setting your peak based on the

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