[time-nuts] OT stuffing boards: was GPS interface/prototyping board
Bob Stewart
bob at evoria.net
Thu Jun 23 18:38:05 EDT 2016
Thanks Bob et al,
This is about what I expected, but I had to ask. I wonder how long it'll take for that several thousand bucks for a pick-n-place machine to become a couple hundred? That would be the final hurdle for the tiny electronics business.
Anyway, I've had my say and we can let this die. Thanks for the responses!
Bob
-----------------------------------------------------------------------------------
GFS GPSDO list:
groups.yahoo.com/neo/groups/GFS-GPSDOs/info
--------------------------------------------
On Thu, 6/23/16, Bob Camp <kb8tq at n1k.org> wrote:
Subject: Re: [time-nuts] OT stuffing boards: was GPS interface/prototyping board
To: "Bob Stewart" <bob at evoria.net>, "Discussion of precise time and frequency measurement" <time-nuts at febo.com>
Date: Thursday, June 23, 2016, 5:27 PM
Hi
Around here, assuming:
1) You supply all the parts on full reels with
leaders
2) There is no hand assembly
work
3) You already have framed stencils
that are the correct size for their gear
4)
You have multiple proper solder and placement fiducials on
both sides
5) The boards are designed to
mount on their gear
6) Your parts and design
rules fit their gear and rules.
7) No
electrical test, visual inspect only.
8)
Best effort only, If the part does not solder etc, you
replace it on your time.
You can get various places to look at a batch
for $500 to $1000. If your stencils !=
their
stencils figure $100 to $200 each.
If you want to ship things a ways, you can save
a bit of money. Shipping plus packing
always seems to be a bit expensive.
By far the best approach is to
get all of their rules before you start a board layout.
Then
do it in whatever arrays / panel size
they are set up for and all the other little details.
This all starts to make a lot
more sense to the local outfits when you are talking a few
hundred boards.
Even more so if it is a few
hundred boards a month, every month for a few years.
====
Some math:
120
parts on 10 boards is 1200 parts. A good machine will do
that in < 6 minutes. Setting up the machine,
loading and unloading the machine, pulling
boards on and off the machine, programming the whole thing,
validating everything ….. that’s an
afternoon’s worth of work (maybe more) and maybe an hour
of down time
on the machine.
====
Of course for a few thousand dollars you can
buy your own pick and place machine ….
Bob
> On Jun 23, 2016, at 3:28 PM, Bob Stewart
<bob at evoria.net>
wrote:
>
> One more
related question before this topic dies, if you don't
mind. What about the other side of building: stuffing the
boards. My GPSDOs have about 120 parts per board, plus
some custom work on the SMA connectors. Is there a service
out there that will populate boards with SMT components for
small orders at a reasonable price? Small is 10 boards.
>
> Bob - AE6RV
>
>
-----------------------------------------------------------------------------------
> GFS GPSDO list:
>
groups.yahoo.com/neo/groups/GFS-GPSDOs/info
>
>
--------------------------------------------
> On Wed, 6/22/16, Clint Jay <cjaysharp at gmail.com>
wrote:
>
> Subject:
Re: [time-nuts] RS232 / GPS interface/prototyping board
> To: "Discussion of precise time and
frequency measurement" <time-nuts at febo.com>,
"Nick Sayer" <nsayer at kfu.com>
> Date: Wednesday, June 22, 2016, 6:06 PM
>
> Life is so much
easier
> now, dirtypcb is a great
service, I have a pile of
> boards here
from them which are far greater
> quality
than anything I could
> hope to
> produce at home or even in the lab I used
to have.
> They're also
> better quality than any of
> the local board houses I used in the
past.
>
> Having said
that, I did hand
> manufacture fifty
single sided boards from
> photo laminate
to completed product in one
> weekend
using a Dremel drill
> press for
> somewhere around four thousand holes and
hand soldering
> every
> component so it was definitely
> possible
> On 23 Jun
2016 00:01, "Nick
> Sayer via
time-nuts" <time-nuts at febo.com>
> wrote:
>
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