Electronics Forum | Thu Nov 19 05:18:37 EST 2009 | prodivegsr
Hi All, Recently we are working on the conformal coating process using Humiseal chemical 1B73 and thinner 521. Bubbles on component body/joints are seen after gone through the IR Reflow Oven. During the conformal coating, only tiny bubbles seen af
Electronics Forum | Mon Mar 07 08:03:14 EST 2005 | jonathanpaul
Have any of you ever experienced minor eruptions in your solder bath while it is heating up? Our solder bath splashes solder while it's heating. Once the bath is molten, it no longer does. Can anyone suggest a cause?
Electronics Forum | Mon Mar 07 09:19:30 EST 2005 | patrickbruneel
Check your heater elements one or more are defective causing uneven heat distribution.
Electronics Forum | Mon Mar 07 11:55:12 EST 2005 | jonathanpaul
Thank-you gentlemen, I'll look into these possibilities.
Electronics Forum | Mon Mar 07 20:14:19 EST 2005 | KEN
It may not be a bad element. If the elements are not sequenced you will have this problem. It may be a machine design limitation.
Electronics Forum | Mon Mar 07 08:53:59 EST 2005 | Marc
some thoughts come to mind..... usually an air pocket as the solder heats up, or the surface is still solid and liquid under, pressure builds and then... check your heaters, make sure one (or more) is not bad, may be getting uneven heating. cover y
Electronics Forum | Thu Mar 10 15:04:40 EST 2005 | pmd
Rapid heating of solder caused solder underneath surface to expand and become pressurized. Check to see if power cycles on and off during warm up. A slower rate of of climb should help.
Electronics Forum | Wed Jul 23 05:47:53 EDT 2003 | iman
Yo Thanks! right on the money pad, the pinhole occurs mainly in the (fillet's) top-surface central of the whole solder (fillet surface) area. Like you said, large surface area, lowest surface tension. that's a possible cause, that the potential voi
Electronics Forum | Mon Mar 07 22:23:40 EST 2005 | mrduckmann2000
Ken, You nailed it! We have a Electrovert Vectra wave solder machine that will erupt solder all over the place while heating up, we had to disable the timer because of all the solder splatering. Electrovert told us that our machine had a small des
Electronics Forum | Tue Nov 01 12:29:35 EST 2005 | russ
I just noticed that you mention 2-5mm off, that is huge! It would seem to me that there is an external force here to move a part that far. Things such as a heavy air stream that for some reason is really hitting this part, something on the PCB unde
