Electronics Forum: following (Page 1 of 244)

White powdery residue following Wave

Electronics Forum | Fri Mar 02 15:32:52 EST 2001 | jagman

We are seeing a white, powdery residue following the Wave process. Is this a solder masking issue (poor cure from the PCB mfg) or Wave process related? Any input is greatly appreciated.

White powdery residue following Wave

Electronics Forum | Fri Mar 02 15:52:19 EST 2001 | jagman

This happens to be after the water wash process. These are Burn-In boards so an SMT epoxy is used prior to wave. The flux used is Kester 2331ZX. Would using a thinner cause this to occur? The residue is all over the board. Thanks.

White powdery residue following Wave

Electronics Forum | Fri Mar 02 16:47:39 EST 2001 | traviss

If the thinner you are using is 4662 and the correct amounts that should not be the problem. Is this the first solder operation? I would start by looking for rosen or no clean flux getting on the boards at some point before wave soldering and not bei

White powdery residue following Wave

Electronics Forum | Sat Mar 03 03:56:04 EST 2001 | wister

I had confused by same problem, the reason I found is the interval between wave soldering and cleaning is too long and did not set the temp. of D.I water at 120F~150F. Kester flux is good. Rgs, Wister

White powdery residue following Wave

Electronics Forum | Tue Mar 06 13:59:39 EST 2001 | dason_c

I have experience to the Kester 2331 water soluble flux long time ago with white residue and it related to the solder masking. Check what kind of the solder mask and ask Kester to do the test for you. Rgds.

White powdery residue following Wave

Electronics Forum | Fri Mar 02 15:44:26 EST 2001 | traviss

Is this after wave or wash? Its too bad the archives are gone this one has come up a bunch of times. Most of the time its caused by rosen or no clean flux being put through a water wash. There are several other possibilities. You will probably hear w

White powdery residue following Wave

Electronics Forum | Mon Mar 05 20:53:32 EST 2001 | davef

When you say all over the board, please give more detail. Where are they located? [All over wave soldered portion, laminate only, solder mask only, solder only, specific components only, etc] When you say white residue, what color are they really?

GSM2 will not zero - Theta1 following error

Electronics Forum | Tue Feb 09 12:47:56 EST 2010 | swag

Refer to the thread started by Deni on 2/4/10. Your problem is similar.

GSM2 will not zero - Theta1 following error

Electronics Forum | Tue Feb 09 08:48:29 EST 2010 | davemacnemo

Machine has 2 FlexJets installed. Working fine until it started giving Theta1 following errors. Machine will not zero. Coincidental (I think) with this, the Low Power Power Supply behind the Power Distribution Panel failed and was rebuilt. It's worki

lets see a show of hands

Electronics Forum | Thu Aug 14 07:28:11 EDT 2003 | Stephen

I just recently heard a new phrase "following the followers" instead of following the leaders. Getting rid of lead in electronics does not make the environment better because the replacements are worse.

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