[SGVHAK] Toaster Oven Reflow Source Code

[Tux Lab via HAK]

Braddock,

I use a hotplate to do reflow soldering.  It works fairly well.  Does
the entire board all at once.    Soldering is fastest part.   Solder
paste dispensing and component placement take a lot longer, I use
mostly 0603s, sometime 5~10x longer than reflow soldering with a
hotplate.

Recently I started using laser cut 5mil mylar soldering masks and that
sped up applying the soldering paste.  Dave is working on a soldering
paste dispensing machine based on his 3d printer design.   He showed
us the result using a felt tip pen.    It looks pretty good.

We just got fairly ancient  MDC EMC96 (made in 1996) pick and place up
and running.   The machine was upgraded back in early 2000 to a window
based software, still very rudimentary.  Basically align the fiduciary
and press start.   No vision system to correct for parts misalignment.
Just the option to use a pair of jaws to uniformly close on the picked
part for centering before placing it on the board.

We did a simple test using 0603, 0805, and 1206.  The parts seems to
all land on the proper pads.  Hopefully the reflow process will take
care of the slight misalignments.



On Fri, Nov 17, 2017 at 1:20 PM, Braddock Gaskill via HAK
<hak at sgvhak.net> wrote:
> John,
> I've always been curious - have you done any toaster reflow soldering of
> sophisticated boards?  Is it actually helpful and saves time?
>
> I use my hot air reflow workstation (hot air gun) and work piece by piece
> with solder paste.  I always find part placement takes most of the time, and
> could only imagine a fully populated unsoldered board being knocked on its
> way into the oven.
>
> Of course you've got that robot arm for pick&place... :)
>
> -braddock
>
> On Fri, Nov 17, 2017 at 1:04 PM, Tux Lab via HAK <hak at sgvhak.net> wrote:
>>
>> I am thinking of getting the TO3210SSD.  It's slightly smaller version
>> of TO3250XSB.  Both are 1500W convection oven.   I am thinking maybe
>> the smaller internal volume means a slight faster heating ramp?   Home
>> Depot has it at $43.34+tax+free shipping.
>>
>> I'll also add additional insulation referencing
>> http://pcbisolation.com/blog/reflow-toaster-oven-build/ as a guide.
>>
>> I also like to add network capability to the arduino, or use a RPi as
>> a controller to remotely program the heating profile.
>>
>> Dave is charging ahead with his build and we can reference his build
>> for the sgvhak build your own reflow oven hackathon.
>>
>> On Fri, Nov 17, 2017 at 10:51 AM, Steve <realstevendoran at gmail.com> wrote:
>> > David / John,
>> >
>> > A link to the source code James used for his Toaster re-flow oven is
>> > below:
>> > https://github.com/FelixVanOost/Reflow-Oven-Controller
>> >
>> > Doing some research, the Black and Decker TO3250XSB convection toaster
>> > oven
>> > seems to be the best oven to modify.
>> >
>> > -Steven
>>
>