Electronics Forum | Wed Sep 20 16:27:06 EDT 2006 | proy
As we are a low volume shop, the extra handling is not too much of a concern. My biggest concern is if the flux sitting on teh board for a long time (few hours) is going to cause any problems in solderability. My thought is that it should not as it
Electronics Forum | Fri Jul 04 00:36:25 EDT 2008 | shrek
Try a linear, very flat ramp rate on the order of 0.5 degrees celcius per second. I know this is hard to accomplish with a five zone, but try to lower the first couple of zones (the preheat zone), and then spike to reflow aggressively during your la
Electronics Forum | Tue Jul 08 22:44:06 EDT 2008 | proy
I made progress and almost acceptable results by adding heat to the bottom of zone 4 HOWEVER, the core problem I uncovered last night/this morning was that the #4 top side blower had failed. I think this is the key why I was having so much trouble.
Electronics Forum | Thu Jul 10 10:25:05 EDT 2008 | gregoryyork
I guess the paste is Leaded hence the 220 Peak temp and the Sn100c is Eutectic at 227C so you need to be hotter to melt the HASL finish or you are relying on it alloying together with the paste which takes much longer. suggest running peak temp of 23
Electronics Forum | Tue Feb 17 22:49:14 EST 2009 | davef
Try: acrylic adhesive Klapton tape [google for a source] It too is more expensive than the silicone adhesive tape. So, your buyer will keep trying to sneak the cheapo stuff in on you. We had to write a procurement specification and they still wont q
Electronics Forum | Fri Feb 14 09:03:45 EST 2020 | davef
IPC-1720A: Assembly Qualification Profile Developed by the OEM council of the IPC, IPC-1720A categorizes electronic assembly manufacturer capabilities and supplies the OEM customer with detailed, substantive information. This program simplifies audi
Electronics Forum | Tue Jul 03 08:14:49 EDT 2001 | Stefan Witte
If you hold your board sideways in a 90 degree angle you apply a force of 1 g to your components. 1 g translates into 32 ft / sec. square. This is not too much acceleration for fearless roller coaster drivers but Melf�s and Tantalums can fall off at
Electronics Forum | Mon Aug 24 09:07:03 EDT 1998 | Earl Moon
| What conditions make Earl Moon say "damn, why can't XXX get the HASL right? Just look at this crummy board. Get a RMA No. Stat." I don't have to get that frustrated because I deal with those who do it right most of the time. You have to consider th
Electronics Forum | Tue Aug 25 06:59:04 EDT 1998 | Flyin' on my own
Thanks for the great info, man!! | | What conditions make Earl Moon say "damn, why can't XXX get the HASL right? Just look at this crummy board. Get a RMA No. Stat." | I don't have to get that frustrated because I deal with those who do it right m
Electronics Forum | Tue Aug 25 09:47:32 EDT 1998 | Earl Moon
| Thanks for the great info, man!! | | | | | What conditions make Earl Moon say "damn, why can't XXX get the HASL right? Just look at this crummy board. Get a RMA No. Stat." | | I don't have to get that frustrated because I deal with those who do
