Electronics Forum | Thu Sep 03 19:48:36 EDT 2020 | charliedci
Not in our case, the pre-heat temp was not high enough. Also our pre-heat is only from top (KISS104).
Electronics Forum | Tue Sep 08 10:45:26 EDT 2020 | charliedci
We've had to hand solder 1 or 2 pins in cases like this or you could use chip bond or some adhesive on the component body.
Electronics Forum | Mon Aug 31 12:27:08 EDT 2020 | dontfeedphils
I guess my question would be why are you getting so much/leaving so much flux on the boards during the select solder process? With a drop-jet fluxer you should be able to apply the flux very selectively and leave a fairly clean looking PCBA, assumin
Electronics Forum | Mon Aug 31 12:44:21 EDT 2020 | kylehunter
We are using a spray fluxer. Most of the THT parts are long connectors, so we spray along the length of the connector. I'm sure we can tune it a bit to reduce the amount of flux some. We're still going to need to remove the flux for some of our clien
Electronics Forum | Tue Sep 01 16:47:25 EDT 2020 | charliedci
The problem that we have seen applying NC flux (EF2210) at selective solder is that the flux overspray (relative to the nozzle path) did not see high enough temperature to activate the flux and turn it to a non-conductive, benign residue as one would
Electronics Forum | Mon Aug 31 16:30:01 EDT 2020 | emeto
I would question your motive "There's no way that I feel comfortable shipping boards after a selective without cleaning them, the amount of flux on the board is significantly more than from SMT". 1. Who said that residue should be cleaned and why? O
Electronics Forum | Thu Sep 03 01:15:52 EDT 2020 | kylehunter
> The problem that we have seen applying NC flux > (EF2210) at selective solder is that the flux > overspray (relative to the nozzle path) did not > see high enough temperature to activate the flux > and turn it to a non-conductive
Electronics Forum | Thu Sep 03 21:49:20 EDT 2020 | kylehunter
> Not in our case, the pre-heat temp was not high > enough. Also our pre-heat is only from top > (KISS104). Ahh that makes total sense. We have bottom IR, and have thermocoupled at 100c, so I think we should be good on that end. Anoth
Electronics Forum | Mon Aug 31 16:55:48 EDT 2020 | kylehunter
> I would question your motive "There's no way > that I feel comfortable shipping boards after a > selective without cleaning them, the amount of > flux on the board is significantly more than from > SMT". 1. Who said th
Electronics Forum | Sun Aug 30 17:31:15 EDT 2020 | kylehunter
Hi all, (I posted on eevblog also, figured I'd try hear as well since this seems like a semi "niche" question) I need some advice on PCB cleaning. Up to this point, our assembly line has strictly run NC paste, with all SMT parts. We never washed an
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