Ramon,
Brass fittings in the Flux tank were eaten through, rivets on the fluxer assembly were dissolved to the point where they fell out, the stainless steel enclosure of the flux reservoir and fluxer now look rusty and the excess flux dripping off boards into the pre-heat elements have caused flash over arcs that trip circuit breakers.
The solutions to date have been to change the brass fittings to stainless steel, the rivets have not been replaced, the stainless enclosures are cleaned more frequently and the air knife has been adjusted for air velocity and angle to reduce the amount of excess flux.
These items sound like we have a lot a trouble with OA (or WS), but it yields better boards as Brian Ellis has outlined. I'll take the problems to get better yield.
Phil
-----Original Message-----
From: Dehoyos, Ramon [mailto:[log in to unmask]]
Sent: Tuesday, May 04, 2004 8:27 AM
To: Phil Nutting; [log in to unmask]
Subject: RE: [TN] OA / RMA
Thanks Phil:
What parts of the machine have been eaten or corroded and what steps have you made to slow down the corrosion?
Regards,
Ramon
> -----Original Message-----
> From: Phil Nutting [SMTP:[log in to unmask]]
> Sent: Monday, May 03, 2004 2:25 PM
> To: [log in to unmask]
> Subject: Re: [TN] OA / RMA
>
> Ramon,
>
> About 3 years ago we switched from a no clean flux to an OA flux. This change was driven by a change in board washing equipment. We had been using a Terpene & Alcohol based batch system that no one liked and switched to a closed loop DI batch cleaner.
> The plus side has been better solder joints out of the wave and cleaner looking boards after cleaning.
> The minus side has been that the OA flux really eats up everything in sight in the wave soldering machine. We have accepted this as a cost of business when using the OA flux.
>
> The good out-weighs the bad.
>
> Phil
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]]On Behalf Of Dehoyos, Ramon
> Sent: Monday, May 03, 2004 2:19 PM
> To: [log in to unmask]
> Subject: [TN] OA / RMA
>
>
> Hi Technetters:
> Has anybody done a comparison study of RMA/OA fluxes for wavesolder? Or any personal experiences in this regard will be appreciated.
> Thanks in Advance
> Ramon
>
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