Electronics Forum: turned (Page 1 of 196)

Gloves turned green while holding hot PCBA

Electronics Forum | Fri Apr 26 12:18:24 EDT 2002 | Yngwie

Today the line experienced the white gloves turns green at the point of contact when holding fresh board that came out from wave soldering. Was that the effect of inproper solder mask curing at PCB house during fabrications ? For a proper cured solde

Gloves turned green while holding hot PCBA

Electronics Forum | Sat Apr 27 21:56:50 EDT 2002 | yngwie

Thanx for the feedback. The solder mask is PSR-4000 ( need to confirm this - not too sure ). If the board got in touch with the solder bath, for the contact time of 3 - 6 secs, this should not be the case for proper curing process right ?. thanx ag

Gloves turned green while holding hot PCBA

Electronics Forum | Fri Apr 26 12:35:05 EDT 2002 | blnorman

Sounds like the mask wasn't properly cured. What kind of solder mask is it? We use a photoimageable mask on our boards. The secondary cure is ~ 90 minutes @ 150�C. One of the cured mask tests is solder bath resistance where it has to resist degra

Flux turns BRIGHT yellow when in contact with Tin/ Lead

Electronics Forum | Wed Apr 01 07:20:51 EDT 2020 | proceng1

The brush also turned yellow.

Quick turn flex

Electronics Forum | Tue May 03 16:38:21 EDT 2005 | John S

Does anyone know of a reputable supplier of quick turn flex that can handle 4 layers on a 10 day turn? Thanks John S

US based Fast Turn board shop

Electronics Forum | Mon Aug 15 21:01:46 EDT 2005 | grantp

Hi, Can anyone recommend a US based fast turn board shop that is very good, and can meet fast turn deadlines of boards with up to 12 layers? Regards, Grant

UP2000 with grid-lok question

Electronics Forum | Wed Jan 24 08:12:21 EST 2007 | Hussman

Turn off Grid-Lok, turn off side clamps. Use hand inserted tooling (yeah, you may have to do some thinking here)for support. If you have vacuum, turn it on. People still use Grid-Lok?

Quad Qsv-1 Low House Air Pressure

Electronics Forum | Tue Mar 18 22:48:24 EDT 2008 | lectronix

We were told to turn on the air supply prior to turning on the power to the machine. We see this error when we forget to turn the air supply on first, you can just aknowledge the error and it will work.

Strange reaction with Selective Solder alloy

Electronics Forum | Wed Apr 06 15:32:11 EDT 2022 | proceng1

I spoke with a Tech at Superior Flux. He confirmed that Superior 515 will absoluteley turn yellow at room temp. Hydrobromic Acid in the flux, as it binds the hydrogen gases off and the bromine turns yellow. What is weird, is that Tin Bromide is y

Logic gates-I think

Electronics Forum | Fri Apr 21 13:26:15 EDT 2000 | Bob

I'm working on a project that requires that I analyze a signal from the parallel port of my computer and use it to turn on relays. There are about 19 relays to control, and I designed all the gates to get each one on, but there is a problem with keep

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