Electronics Forum | Tue Aug 31 17:36:36 EDT 2004 | davef
NO-LEAD COMPONENTS WITH LEAD SOLDER ISSUE: We agree with Russ. We've dicussed this several times on SMTnet. For instance, look here http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=25394 LEAD COMPONENTS WITH NO-LEAD SOLDER ISSUE: We disa
Electronics Forum | Fri Dec 16 13:31:03 EST 2005 | gpaelmo
Thanks for your response.
Electronics Forum | Fri Dec 16 13:31:28 EST 2005 | gpaelmo
Thanks for your response.
Electronics Forum | Fri Dec 16 08:16:41 EST 2005 | davef
Heat cycles deplete the pure tin layer. Each solder cycle reduces the tin thickness by ~0.1 micron (4 uin). So, if you start with a thin imm tin coating you'll have problems after multiple heat cycles. Steve Wentz says, "In almost every case I've
Electronics Forum | Fri Dec 16 03:47:46 EST 2005 | gpaelmo
Anyone have problems wave soldering white tin finish? We are an ems and our customer provides us the pcb's. SMT and TH components on the board. SMT is fine but when we wave solder, wetting to top side is very poor (solder only flows half way up). We
Electronics Forum | Fri Dec 16 08:00:26 EST 2005 | jax
What you are most likely dealing with: Insufficient Pure Sn layer ( multiple causes ) Because elevated temperatures accelerate the diffusion process, the thickness of the Pure Sn layer will reduce during every thermal cycle... ( bakeing PCBs, S
Electronics Forum | Tue Dec 08 12:44:52 EST 2020 | janwillemreusink
Who is using two sorts of tin in one selective soldering machine with to solder pots? So then the soldering program selects the correct pot (tin). What are the risks? Adding wrong tin in the wrong pot. Mixing up the nozzles?
Electronics Forum | Thu Dec 17 18:24:37 EST 2020 | SMTA-64387520
We use both in our selective soldering machine. Training is the most important concern. As long as you have well trained operators the risk is minimized.
Electronics Forum | Wed Jan 20 07:11:01 EST 2021 | janwillemreusink
Thanks for replying... Unfortunately (or not) it isn't relevant anymore. Due to the effects of covid-19 we don't have any active aerospace customers anymore so (for now) we're only making leadfree products.
Electronics Forum | Thu Dec 10 12:12:40 EST 2020 | robl
Yep, done it previously with a multipot machine. Using with wirefeed to top up the pots means you only have a contamintion risk when you fit a new top up reel. Used separate nozzles for both, but theoretically using titanium nozzles would mean no c
