In other words, the holes are "staggered".
If I recall correctly, virtually every part of the Kepro sysems can be
described as "general hardware...off the shelf"
So, nearly all of the units can be easily repaired by stuff you can buy
at a comprehensive hardware store or from
sellers on ebay. Just make sure you use stainless steel heater elements
in the etch tank and in the coated PC board
dryer cabinet.
Roland F. Harriston
twb8899 wrote:
>
>
> In my last message I tried to show how the spray manifold drill
> pattern would look but it didn't post correctly. This time I'll add
> some hyphens so it spaces properly and I think you will get the idea.
>
> -----------------------------------------------------
> O------O------O------O------O------O------O------O
>
> ---O------O------O------O------O------O------O
>
> O------O------O------O------O------O------O------O
> -----------------------------------------------------
>
> If this doesn't post correctly I'll make a drawing or take some photos
> and post them later.
>
> Tom
>
> --- In Homebrew_PCBs@yahoogroups.com
> <mailto:Homebrew_PCBs%40yahoogroups.com>, "jcarlosmor"
> <jcarlosmor@...> wrote:
> >
> >
> >
> >
> > Hello Tom,
> >
> > I had obtained a used Kepro bench-top etcher. It is a very old
> machine (mid-80s I believe), but I had seen those machines in action
> many years ago and the performance is outstanding for fast etching of
> batch PCBs.
> >
> > The problem is that some parts are missing and/or require fixing.
> The two spray bars are lost. That is no problem because I can buy,
> cut, and cement 1/2" PVC as the originals manifolds. The problem is
> that I do not remember how many holes were in every spray bar. I
> remember that the hole size is about 1/16" ¿Am I correct?, since I
> used a drill bit of this size to clean of debris in the spray bars in
> those etchers many years ago. Do you recall how many holes, what
> distance between them, and the angle of up/down orientation in your
> Kepro etcher? I know that these details are very important to obtain
> the maximum performance of these units.
> >
> > Thank you very much in advance for any help.
> >
> >
> >
> >
> > --- In Homebrew_PCBs@yahoogroups.com
> <mailto:Homebrew_PCBs%40yahoogroups.com>, "twb8899" <twb8899@> wrote:
> > >
> > > Grant,
> > >
> > > You could try using one of the Little Giant pumps. I haven't bought
> > > one of these pumps in years but they used to cost about $25 from WW
> > > Grainger. Kepro uses this small pump in their etchers. They modify
> > > the pump by removing the metal impeller and installing one made from
> > > PVC plastic. There are two pumps in the machine, one for each side.
> > > The manifold is made from 1/2" CPVC pipe. The pipe has about twenty
> > > or so small holes drilled to give the spray pattern. A piece of
> > > plastic window screen hangs between the manifold (spray bar) and the
> > > part to be etched. This screen is used to disperse the spray pattern
> > > across the board for even etching. It works pretty good with 1 ounce
> > > copper taking about 4 minutes to etch with ferric chloride.
> > >
> > > Tom
> > >
> >
>
>
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