Coating is no problem: rotational, inertial, even, sprayed, smoothed,
temp controlled, etc. If coatings are not available, then you make
them. You can always buy a photoresist and spray your boards. The
problem is that when you do the math it comes out that it is
economical and less problem to buy already coated PCBs. I could tell
you how to make this process economical, simple and at home while
watching TV but I would have to kill you ;) Mike
--- In
Homebrew_PCBs@yahoogroups.com, Adam Seychell
<adam_seychell@y...> wrote:
> Before considering making one of these machines first lets find
> if liquid photo resists are available in quantities suitable for
> hobbyists.
> If not the resists are available then we stop thinking about the
> idea.
> If they are readily available then we can start to consider the
> coating methods your described.
> The dry film resists are easier to apply, but still requires
> laminating equipment. I'm almost finished building my photoresist
> machine.
>
> roel_cnc wrote:
> > Hi to all
> >
> > Lets talk about a dip or spin coater, any of you heart of it !!
> > That are machines even aesy to make,
> >
> > dip-
> > as it say's dips the cu clad board in a tank and pulls it slowly
out
> > to make a even layer on (i try't one,it works great)
> > its real easy to make with a slow turning motor and eventualy
some
> > simple plastic gears travel time i mesured was ab. 30cm/min
> > Have somewere a drawing from it.
> > http://www.conformal-coating-machines.com/pages/5/index.htm
> > spin-
> > Heck lets take a fast spinning motor mount a plate on it (similar
as
> > a grammophon player) i build me first 12 years ago from an old 5¾
> > floppy drive
> >
> > BTW. I prefer the dip system it covers both sides the same time
and
> > the drilled holes are also covered.
> >
> >
> > Gr. Roel
> >