I had 6 years of drafting.
4 in high school and 2 after high school.
I have drawn houses, office buildings, hospitals, solar houses.... footings to shingles
and then
one day in 1981 I saw a house get drawn on an IBM PC .. a 286...... every stick of lumber....
in about two minutes. I knew right then that computers would take the jobs away from a pencil pushing
draftsmen like me ....
so thats when I joined the dark side... and pursued a computer programming career.
I am not opposed to the idea of using an eraser shield
BUT
it is not the goal to use fat markers as much as it is the goal to find a VERY thin marker that
does have the right chemistry to draw an SMT pad and hairline copper traces.
AND
since there are more than one permanent marker companies like SHARPIE and ARTLINE
I just figured I would share results of my experiments and if any of you guys do find a fine line marker with
resistance to acid etching solutions then shout it out here.
On 11/12/2016 10:38 PM, roylowenthal@yahoo.com [Homebrew_PCBs] wrote:
>
>
> What's wrong with erasing shields? I still occasionally use one & just
> showed SWMBO the benefits of an Opaline bag for a pencil sketching class
> she's taking on line.
>
Hello, Roy and the group--
Nothing, really-- In response to Bob Roomberg's experiments with marker pens
as dispensers of resist for PC-board paths, an erasing shield might
serve as a
"mask" or template for creation of uniform traces on handmade boards.
Press the shield to the copperclad, drag a marking pen over the
appropriate opening in the shield, and you *might* have straighter and
better-looking traces.
As for the Opaline bag, I think there's one in my supplies cabinet,
along with a motor-driven eraser that can chew its way through a sheet
of paper in no time at all if
carelessly used<g>.
73--
Brad AA1IP
Posted by: Rob <roomberg@ptd.net>
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