Electronics Forum | Sat Sep 22 14:33:50 EDT 2001 | Tony
I like to secure the thermalcouples with a small dot of chip-bonder(surface mount adhesive). The chip-bonder will cure durring the first pass through the oven. After I have developed my profile I remove thermalcouples and the chip-bonder with a solde
Electronics Forum | Fri Sep 21 11:02:37 EDT 2001 | davef
You can measure temperatures any place that you would like, but the issue is the temperature of the solder. We've seen solder temperatures that vary from lead to lead on the same component. Why don't you want to measure the temperature of your so
Electronics Forum | Fri Sep 21 21:43:16 EDT 2001 | dougk
We're used to placing the theromcouple on the solder joint and securing it with thermally-conductive UV adhesive. It's quick & easy to apply, and I've only seen a couple degrees difference from high-temp solder technique. Thoughts?
Electronics Forum | Sat Sep 22 09:00:15 EDT 2001 | davef
We like that method for certain jobs. The res sometimes freaks inspectors. We prefer the aluminum tape we've spoken about before on SMTnet.
Electronics Forum | Wed Sep 26 14:48:01 EDT 2001 | bobm
there is a company called EFD. my contact there is john kaminski. they have thermocouples that are spring loaded requiring no solder at all. they work great. you attach them to the edge of the board and you can move the end to make contact where you
Electronics Forum | Tue Feb 19 10:50:13 EST 2019 | rgduval
Call Heller directly, and give them the oven, and relative thermal density of the board, as well as the solder paste that you're using. They'll be able to give you a baseline profile to start from (both RTS and RSS). Otherwise, use a thermocouple p
Electronics Forum | Tue Feb 19 12:28:26 EST 2019 | slthomas
Presumably you're talking about lead free, but you don't say. Heller can probably provide you with a starting point, as rob has already pointed out, but you do need to develop the capability to perform profiling yourself. That oven should have ECD
Electronics Forum | Wed Feb 20 11:40:31 EST 2019 | bmalhi
Heller Oven comes with a profile pre-loaded so you can start there. RTS = Ramp to Spike. Basically a straight line from preheat to spike. Also known as “Tent” profile RSS = Ramp Soak Spike. This one creates a flat line around 150-180 degrees on th
Electronics Forum | Fri Sep 21 10:44:34 EDT 2001 | slthomas
You can, and for small parts you probably won't see much difference between body temp. and lead temp. For QFPs or PLCCs there will be a much greater delta, though. I'd be more concerned with the small surface area you're making contact on (spherica
Electronics Forum | Wed Mar 24 08:37:32 EST 2004 | steveliu
Hi, Guys, Can anybody tell me what kind of reflow profile is best for a no clean solder paste: Ramp-Soak-Spike or Ramp-to Spike? The paste we are using is AIM 293DX2B. Thanks a lot.
