Homebrew PCBs

Track pins are available from Harwin in PCB diameters of 0.84 and 1.0mm
suitable for a PCB thickness of 1.59mm.
They are available from Farnell In One at AU$43.52 + 10% per 1000 for the 0
84mm versions.

They are most likely available from Newark & Radio Spares among others.

Cheers
Brian
-------Original Message-------
 
From: Homebrew_PCBs@yahoogroups.com
Date: 05/27/05 00:33:50
To: Homebrew_PCBs@yahoogroups.com
Subject: Re: RE : [Homebrew_PCBs] Plated through holes
 
It appears much easier, IMO, to just buy a big spool of thin wire, and
thread it through all vias in a board (in one piece). then solder, then
cut the crisscross pieces away. I think the CNC would be more work.
 
Maybe it is practical to make small studs of copper, just a bit longer
than the hole. Place the board on spacers to allow the studs to protrude
maybe 0.5mm or less, above a steel plate. then take a hammer and hammer on
the board, so that the studs are riveted in place.
 
ST
 
 
 
On Thu, 26 May 2005 16:21:51 +0200, Alan King <alan@...> wrote:
 
>
>    It is a lot of hassle and work for light or medium work.
>   Thinking about it again, I see that it isn't the soldering that is the
> problem, but the locating and cutting and crimping the wires.  Soldering
> both
> sides is easy enough after they're in place.
>   And that part could easily be automated.  A small tube just above the
> board
> with a stepper feeding the wire through the tube.  Say 30 gauge wire
> wrap wire
> with no insulation.  Have the holes just barely larger than the wire, so
> they
> don't need much bent over to hold it in.  Locate the hole, feed just
> enough wire
> to go through with about 1/16th inch extra, move the board over slightly
> to the
> bending blocks to hold the wire in, cut the wire, move more to finish the
> bending, then repeat.  A stationary wire feed/bending system and moving
> the
> board X and Y and this would be a breeze for a CNC setup.  Put in a
> stationary
> vertical drill and you can do the holes too.  Thin wire and you can get
> by with
> very little knife power, which is good since it must be thin and right
> at the board.
>   For doing vias and drilling it might be worth making, and much simpler
> for
> low volume than trying to do PTH..  Same aluminum angle I use for CNC
> support
> would work great for bending/guide pieces, and the wire feed and knife
> would be
> easy.
> Alan
 
 
 
 
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