Electronics Forum | Sun Jul 10 03:39:12 EDT 2016 | rgarcia0626
We have wave soldering machines with SnPb.... the problem is they want to shut off the exhaust fan when there is no production even if the entire machine was not switch Off and the pots are maintain the 250°C. Can someone give any idea on the implica
Electronics Forum | Wed Jul 13 11:59:06 EDT 2016 | emeto
Moisture before reflow is consideration, because damages parts and boards in the reflow process. It is all about this water expanding as gas and cracks part or causes PCB delamination. Moisture after reflow is still affecting the work of the product
Electronics Forum | Thu Jul 14 02:25:59 EDT 2016 | salini
Thanks Evtimav and davef... We are doing tar potting only over the moisture sensitive device (not all over the PCB) to make sure that it does not get effected by moisture. But am unable to test the reliability of the process. Continuous switching or
Electronics Forum | Fri Dec 02 02:51:10 EST 2016 | bukas
hello, can anyone explain why i get dross like this? flux and alloy i use was not changed. this started to happen a month ago when i took out a large quantity of solder dross out of pot. thank you
Electronics Forum | Wed Feb 15 02:36:12 EST 2017 | bukas
yep, thats it. you will need to clean the whole pot. I used some dishwashing wire and Kyzen, and then removed Kyzen residues with IPA.
Electronics Forum | Wed Feb 15 08:14:59 EST 2017 | cromaclear
The main problem is that we changed the whole pot 1 year ago. From where does this containment comes from?
Electronics Forum | Tue Feb 14 10:25:04 EST 2017 | swag
Pre-heat, pre-heat, pre-heat! Swap out your acetylene with some propane. Problem solved. Throw a potato in your solder pot while your at it...
Electronics Forum | Tue Mar 21 13:03:45 EDT 2017 | cbeneat
Tried it years ago, didn't like how it turned the pot brown, don't remember it impressing me with how it worked either.
Electronics Forum | Thu Aug 03 17:53:58 EDT 2017 | zsoden
That may just be an optical illusion. I've just measured and they're cut to just over 4mm (0.157"). The pot is at the level specified by the manufacturer (5mm from the bottom of the PCB if I remember correctly).
Electronics Forum | Fri Oct 06 01:08:17 EDT 2017 | tsvetan
potting the board with epoxy will make it non repairable the same insulation effect you would achieve if you just put around the inductors some styrofoam or other sound insulator without messing with epoxy
