Re: [CAD_CAM_EDM_DRO] Pick and Place question

Ok, thanks, i knew there had to be reason. cul brian f.

----- Original Message -----
From: "Mark Vaughan" <mark@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Wednesday, March 28, 2007 11:04 AM
Subject: RE: [CAD_CAM_EDM_DRO] Pick and Place question


> Hi Brian
>
> For some heavier parts or PCB's subjected to hi G forces and vibrations
they
> stick block of glue on the PCB where the parts are and glue them down.
>
> Many computer simm memory modules used to be made this way I don't know
> whether they still are, but I do remember back in the 90's when I worked
in
> PA, memory prices went through the roof when the glue factory burnt down.
At
> that time we were told !! all the memory chips were glued then soldered.
>
>
>
> I use a dab of super glue if I want t stick any SMT part, normally before
> hand soldering. Hope I won't have to hand solder many again.
>
>
>
> There are also times when a group will not have enough component feeders
so
> they stick the first batch of parts down, and a second machine finishes
off
> before soldering. I know a group in Essex that did it this way, though now
> they have a bigger machine, I have there old one.
>
>
>
> Regs Mark
>
>
>
> Dr. Mark Vaughan Ph'D. B.Eng. M0VAU
>
> Managing Director
>
> Vaughan Industries Ltd, reg in UK no 2561068
>
> Water Care Technology Ltd, reg in UK no 4129351
>
> Addr Unit3, Sydney House, Blackwater, Truro, Cornwall, TR4 8HH, UK.
> Phone/Fax 44 1872 561288
>
> RSGB DRM111(Cornwall)
>
> _____
>
> From: CAD_CAM_EDM_DRO@yahoogroups.com
> [mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of BRIAN FOLEY
> Sent: 28 March 2007 17:02
> To: Cad_CAM_EDM_DRO@yahoogroups.com
> Subject: [CAD_CAM_EDM_DRO] Pick and Place question
>
>
>
> Hi, i see references to solder paste and then to glue or adhesive. i
always
> thought the solder paste was used as the adhesive till it was reflowed...
> perhaps some one can explain if there is a difference? thanks, brian f.
>
> [Non-text portions of this message have been removed]
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>
> [Non-text portions of this message have been removed]
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