On 04/02/2017 07:26 AM, David Griffith via cctech wrote:
That's why I put this in the context of PNP robots rather
than hand-soldering. My last run of P112 boards was 150
and I'm thinking of doing another 150 or maybe 200.
Phew, I sure wouldn't want to hand solder 150 - 200 boards!
Been
> On Apr 2, 2017, at 9:37 AM, Paul Koning via cctalk
> wrote:
>
> ...
> I have a nice article about toaster oven SMD work. It's in German, via the
> PCB Pool website if I remember right.
Here it is: https://www.beta-estore.com/download/rk/RK-10001_76.pdf
paul
On Fri, 31 Mar 2017, Paul Koning via cctech wrote:
On Mar 31, 2017, at 1:51 PM, allison via cctech wrote:
On 03/31/2017 06:32 AM, David Griffith via cctalk wrote:
I'm down to the last few P112 boards for sale and am pondering
another run of them because demand is steady. One of the biggest
On Sun, Apr 02, 2017 at 10:40:40AM -0700, Chuck Guzis via cctalk wrote:
> On 04/02/2017 07:53 AM, Diane Bruce wrote:
>
> > Read this:
> >
> > https://nepp.nasa.gov/whisker/reference/tech_papers/2011-nasa-gsfc-whisker-failure-app-sensor.pdf
>
> There are problems with the site's certificate, but
On 04/02/2017 07:53 AM, Diane Bruce wrote:
> Read this:
>
> https://nepp.nasa.gov/whisker/reference/tech_papers/2011-nasa-gsfc-whisker-failure-app-sensor.pdf
There are problems with the site's certificate, but I was able to wget
the paper using the --no-check-certificate option.
Tin whiskers we
On Sat, Apr 01, 2017 at 06:59:54PM -0700, Chuck Guzis via cctalk wrote:
> On 04/01/2017 07:01 AM, Paul Koning via cctalk wrote:
>
> >
> > Before building my most recent project (which involves an
> > unpleasantly small-pitched TSOP package housing multiple RS232 level
> > converters) I asked expe
> On Apr 2, 2017, at 12:51 AM, Jon Elson via cctalk
> wrote:
>
> On 04/01/2017 11:27 PM, Chuck Guzis via cctalk wrote:
>> What do you do about boards with SMT components on *both* sides? I can't see
>> how it would work with a toaster oven.
> OK, this is going to be long.
>
> I do small-scale
On Sat, Apr 01, 2017 at 09:27:47PM -0700, Chuck Guzis via cctalk wrote:
>What do you do about boards with SMT components on *both* sides? I
>can't see how it would work with a toaster oven.
I have much less experience than Jon Elson but I've tried it a few times
and my results agree with his: su
On 04/01/2017 11:27 PM, Chuck Guzis via cctalk wrote:
What do you do about boards with SMT components on *both*
sides? I can't see how it would work with a toaster oven
Oh, part 2. Most of my boards have parts on both sides. If
you have a glue dispenser, you can apply glue to your first
side
On 04/01/2017 11:27 PM, Chuck Guzis via cctalk wrote:
What do you do about boards with SMT components on *both*
sides? I can't see how it would work with a toaster oven.
OK, this is going to be long.
I do small-scale production of mostly motion control boards,
but also some nuclear instrumenta
On 04/01/2017 07:41 PM, John Wilson via cctalk wrote:
> - I do QFPs (0.5mm and 0.4mm) using a cheap eBay binocular
> microscope, Ameritronics solder paste, and a toaster oven controlled
> by an Arduino with a homemade shield on it (with a MAX6675 for a
> K-type Sparkfun thermocouple which I positi
On Fri, Mar 31, 2017 at 11:32:08AM +, David Griffith via cctalk wrote:
>One of the biggest challenges for the last
>run was getting the QFP-packaged 100-pin chips[1] in a state such that the
>pick-and-place robot wouldn't throw a fit about slight differences in lead
>position. The stuffing hou
On 04/01/2017 07:01 AM, Paul Koning via cctalk wrote:
>
> Before building my most recent project (which involves an
> unpleasantly small-pitched TSOP package housing multiple RS232 level
> converters) I asked experts at work (technicians who do a lot of fine
> detail soldering) about RoHS.
>
> T
On 03/31/2017 11:15 PM, Chuck Guzis via cctech wrote:
I use pretty much the same method, but start off with just
a binocular loupe and then finish with a stereo microscope
for final inspection.
Oh, the trick for this is there are inspection microscopes
with long working distance that allow you
> On Mar 31, 2017, at 7:28 PM, allison via cctech wrote:
>
> ...
> I've not gone over to the Rohs side, most of the solders are not fun to
> work with though a
> few have very active fluxes and solder aluminium well. So its Kester
> 44 in 10 and
> 20 mil (inch mil) diameters.
Before building
On 03/31/2017 12:55 PM, Jim Brain via cctech wrote:
On 3/31/2017 12:51 PM, allison via cctech wrote:
Is this something that an experienced hand can manually do?
I can verify that it is indeed possible. I lay down
xc95144xl-tq100s all the time with my iron and some flux
and some wick, and I
On 04/01/2017 11:19 AM, Chuck Guzis via cctalk wrote:
BGA, on the other hand, is something that I haven't
mastered--and I doubt that I ever will, given the small
size of some of the parts.
Yes, I'm with you. if I get bad soldering on a leaded
flat-pack, I can poke the leads with an X-acto kn
On 04/01/2017 08:28 AM, Jon Elson wrote:
> On 03/31/2017 11:15 PM, Chuck Guzis via cctech wrote:
>> I use pretty much the same method, but start off with just a
>> binocular loupe and then finish with a stereo microscope for final
>> inspection.
> Oh, the trick for this is there are inspection micr
On 03/31/2017 06:15 PM, Jon Elson via cctech wrote:
> I have a project I do from time to time using 128-lead 14mm TQFPs
> with 0.4mm lead spacing. I use a stereo zoom microscope with a
> home-made LED ring light. First, I rub the pads with a pencil eraser
> to remove oxidation caused by reflow tem
On 3/31/2017 12:51 PM, allison via cctech wrote:
Is this something that an experienced hand can manually do?
I can verify that it is indeed possible. I lay down xc95144xl-tq100s
all the time with my iron and some flux and some wick, and I get nearly
100% rates. My eyes are not what they use
On 03/31/2017 06:28 PM, allison via cctech wrote:
Is this something that an experienced hand can manually do?
Yes, definitely. 100 lead PQFP is perfectly doable if the lead pitch is not
insanely small. It takes a good fine tip soldering iron (mine is a Weller with
a PTS tip), fine solder (p
On 03/31/2017 02:00 PM, Paul Koning wrote:
>> On Mar 31, 2017, at 1:51 PM, allison via cctech
>> wrote:
>>
>> On 03/31/2017 06:32 AM, David Griffith via cctalk wrote:
I'm down to the last few P112 boards for sale and am pondering
another run of them because demand is steady. One of the
> On Mar 31, 2017, at 1:51 PM, allison via cctech wrote:
>
> On 03/31/2017 06:32 AM, David Griffith via cctalk wrote:
>>>
>>> I'm down to the last few P112 boards for sale and am pondering
>>> another run of them because demand is steady. One of the biggest
>>> challenges for the last run was
On 03/31/2017 06:32 AM, David Griffith via cctalk wrote:
>>
>> I'm down to the last few P112 boards for sale and am pondering
>> another run of them because demand is steady. One of the biggest
>> challenges for the last run was getting the QFP-packaged 100-pin
>> chips[1] in a state such that the
On 03/31/2017 06:32 AM, David Griffith via cctalk wrote:
I'm down to the last few P112 boards for sale and am
pondering another run of them because demand is steady.
One of the biggest challenges for the last run was getting
the QFP-packaged 100-pin chips[1] in a state such that the
pick-an
I'm down to the last few P112 boards for sale and am pondering another run
of them because demand is steady. One of the biggest challenges for the
last run was getting the QFP-packaged 100-pin chips[1] in a state such
that the pick-and-place robot wouldn't throw a fit about slight
difference
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