Electronics Forum: ep256 (Page 1 of 1)

Lead Free paste

Electronics Forum | Wed Dec 06 15:46:57 EST 2006 | SWAG

Check your expiration/storage/shipping conditions. We've been using EP256 for a couple of years and it works excellent. Never had any problems with it.

solder paste selection for an oxidized pin?

Electronics Forum | Wed Oct 22 12:13:18 EDT 2008 | brismittr

A no-clean paste with an above average amount of halides should do the trick. Kester EP256HA is a good choice for this application if you are using a leaded alloy (Sn63 or Sn62).

LED lifted soldering defect

Electronics Forum | Wed Dec 04 12:42:04 EST 2019 | dunks

We currently use Kester's ep256 as well and it seems to be a bit more grainy than one would expect from lead, especially if the temperature is too low. That paste says it's specialty is being robust over a wide range of profiles and stencil conditio

Solder balls

Electronics Forum | Tue Jul 06 10:46:12 EDT 2004 | blnorman

We have now switched to Kester EP256. During our solder paste evaluation, resistance to humidity was one of the selection criteria. We printed multiple boards, then exposed them to 85�F/65% RH. At 30 minutes, 1 hour, 2 hours, and 4 hours exposure

Solder Balls-No Clean Paste

Electronics Forum | Tue Aug 17 11:24:04 EDT 2010 | namruht

I have a question that has been discussed many times, but is always good to get some new insight. We have lots of issues with our no clean process. We use a Kester EP256 solder paste. I would just like to get some general tips on how to get rid of mi

LED lifted soldering defect

Electronics Forum | Wed Dec 04 08:00:57 EST 2019 | kylehunter

Thank you both. We are using EP256 Solder Paste Sn63Pb37 no clean from Kester. I attached our profile as well as Kester's target profile. We used a populated demo board for the profile. We tested along the width, and was less than a 2c difference.

LED lifted soldering defect

Electronics Forum | Tue Dec 17 14:11:43 EST 2019 | kylehunter

Haven't run those boards again, so haven't had the issue.. Since it seems like we may want to start using more aggressive flux based paste soon, what are some good choices? Ideally I'd like to stay with Kester, since they are readily available. EP2

gas to extend allowed print-to-place time?

Electronics Forum | Thu Apr 21 19:41:35 EDT 2016 | adamjs

Hi, is there some sort of gas (certainly refrigerated, possibly pressurized?) in which printed boards can be stored to extend the allowed time between SMT paste printing and placement? Or other technique for achieving this? Background: we're a smal

Modems reflow mistake

Electronics Forum | Mon Oct 12 10:26:52 EDT 2015 | eniac

My greetings to all. Time to time I receive the next results of modems soldering: http://i.piccy.info/i9/71ae4c358c6e4bc3f1cbf140495bc437/1444660170/135005/872954/GL868_7.jpg or http://i.piccy.info/i9/d1181be142e285a39b49b81d37bde72a/1444660270/1

Researching placement machines - where do I start?!

Electronics Forum | Fri Nov 06 08:50:07 EST 2009 | jeffreyj

adlsmt - I do apply paste (Kester EP256) by hand to the boards now with 5 mil thick stainless steel stencils. A few of the parts almost always need rework, though, either because I didn't place them accurately or there's too much paste, or it got sme


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