Electronics Forum: bottom (Page 1 of 227)

Reflow oven bottom heaters

Electronics Forum | Thu Nov 16 22:01:06 EST 2017 | deanm

That model comes standard without bottom preheaters. Bottom preheaters are an option so I would think it is designed for general use unless you have some very thermally challenging boards. As long as you are within the process window, you'll be fine.

Reflow oven bottom heaters

Electronics Forum | Thu Nov 16 08:57:00 EST 2017 | jandon

We found used Ersa HotFlow 2/14 reflow oven that does not have bottom side preheaters. Can it be easily and safely used in normal high mix/low volume production or is it built for specific products which does not need bottom preheaters?

bottom side epoxy

Electronics Forum | Wed Oct 06 21:45:20 EDT 1999 | John

I recently had the opportunity to visit the vendor who is making my boards. On my trip I noticed that the guy who was in charge of the SMD placement machine (brand new Samsung) still had to manuallly place about 20%-40% of the parts after placement b

Re: bottom side epoxy

Electronics Forum | Thu Oct 07 03:08:57 EDT 1999 | Chris May

I recently had the opportunity to visit the vendor who is making my boards. On my trip I noticed that the guy who was in charge of the SMD placement machine (brand new Samsung) still had to manuallly place about 20%-40% of the parts after placement

Re: bottom side epoxy

Electronics Forum | Thu Oct 07 05:53:54 EDT 1999 | Wolfgang Busko

I recently had the opportunity to visit the vendor who is making my boards. On my trip I noticed that the guy who was in charge of the SMD placement machine (brand new Samsung) still had to manuallly place about 20%-40% of the parts after placeme

Re: bottom side epoxy

Electronics Forum | Fri Oct 08 16:48:24 EDT 1999 | Charles Morris

I recently had the opportunity to visit the vendor who is making my boards. On my trip I noticed that the guy who was in charge of the SMD placement machine (brand new Samsung) still had to manuallly place about 20%-40% of the parts after placement

Re: bottom side epoxy

Electronics Forum | Thu Oct 07 09:59:01 EDT 1999 | Dave F

I recently had the opportunity to visit the vendor who is making my boards. On my trip I noticed that the guy who was in charge of the SMD placement machine (brand new Samsung) still had to manuallly place about 20%-40% of the parts after placement

Epoxy on bottom of SMT component

Electronics Forum | Sun Dec 02 22:00:21 EST 2007 | shy

The idea for solder at bottom side is for component such as SOIC, QFP and chip. This solder is needed since not entire bottom component had glue. that's why we're combining both solder paste and glue and reflow at the same time.

Epoxy on bottom of SMT component

Electronics Forum | Thu Nov 29 13:05:46 EST 2007 | stepheniii

I really hate to ask but must. Are the components that are falling off, the components that don't have glue? Seriously not all the parts on the bottom are glued on? How do they stay on during the wave? The normal way is to run the top SMT as normal

Epoxy on bottom of SMT component

Electronics Forum | Fri Nov 30 08:35:51 EST 2007 | stepheniii

We put glue on the bottom of the board that already has the topside SMT mounted. We populate the board. We put it through a cure profile. At this stage the topside components are soldered on. The bottom side components are glued on with NO solder on

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