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'Making a photoplotter. Is it realistic?'
1999\02\21@184320 by Brian Gracia

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Hi everyone,

I am interested in making a photoplotter.  I would be building a ccnc
machine and instead of using a dremel, I would be using a fiber optic
strand as the light source.

Anyone have any thoughts on this?

Brian

1999\02\22@003449 by Stuart O'Reilly

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I think the way to go would be to use the Dremel with a routing bit in it
to route away the copper on a blank board. The main advantage of this is
that I wouldn't have to design one my self <g>. From this question can I
assume you got that little book from Nuts n Volts on CCNC machines? I
must say it really got my mind ticking over.

Stu

Brian Gracia wrote:

> Hi everyone,
>
> I am interested in making a photoplotter.  I would be building a ccnc
> machine and instead of using a dremel, I would be using a fiber optic
> strand as the light source.
>
> Anyone have any thoughts on this?
>
> Brian

1999\02\22@084607 by wwl

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On Sun, 21 Feb 1999 17:30:26 -0600, you wrote:

>Hi everyone,
>
>I am interested in making a photoplotter.  I would be building a ccnc
>machine and instead of using a dremel, I would be using a fiber optic
>strand as the light source.
>
>Anyone have any thoughts on this?
>
>Brian
Why bother building - small (A3,A4) second-hand X-Y plotters have
become very cheap now that laser & colour printers are so cheap.
The main problem would be that you need a fibre that can carry UV
light, and a suitably intense source,  

1999\02\22@090539 by D. F. Welch

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At 05:30 PM 2/21/99 -0600, you wrote:
{Quote hidden}

HMM... Wonder if you couldn't use as photo ablative
approach, start with a board coated with a resist then
use an IR laser diode coupled to the fiber to ablate
the unwanted resist.



73,
Dan Welch
spam_OUTw6dfwTakeThisOuTspamqsl.net

1999\02\22@112938 by Stefan Sczekalla-Waldschmidt

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"D. F. Welch" wrote:
>
> At 05:30 PM 2/21/99 -0600, you wrote:
> >Hi everyone,
> >
> >I am interested in making a photoplotter.  I would be building a ccnc
> >machine and instead of using a dremel, I would be using a fiber optic
> >strand as the light source.
> >
> >Anyone have any thoughts on this?

some years ago I saw the thing you4re describing on a trade show (dealer
show, fair).
they used a very special kind of custom made pen to switch the UV-light
on and off.

it was quite expensive ( abt. 4200 DM )

IMHO - while I tryed several times plotting with ink onto a A3 Plotter
I decide this a rather slow way in getting a pcb.

Whith the knowlege I collected I would suggest to print the artwork
using
a generic laser-printer onto "vellum" (transparent paper as used by
architects on
their drawing-boards) and using with photo-resist ready coated pcb4s.

As light source I recommend the appropriate "flourescent tube" which are
availiable
on request with the matching wave-length. ( e.g. Philips: Colourtype TLD
05 )

I4m using 2 tubes each 15 Watts. Time to expose abt. 4min 30 sec.

This gave very satisfying results to me.

Kind regards

       Stefan

1999\02\22@120436 by Wagner Lipnharski

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Mike Harrison wrote:
> Why bother building - small (A3,A4) second-hand X-Y plotters have
> become very cheap now that laser & colour printers are so cheap.
> The main problem would be that you need a fibre that can carry UV
> light, and a suitably intense source,

If you intend to use the photoplotter just to sensibilize films and
produce
printed circuit boards or something similar, you don't need a UV source,
just use a regular 3x4" regular Kodak negative cut, or the required size,
and a yellow LED very well focused and close to the film.  For sure it
will require film processing and things, what it turns to be not a great
idea
since any 600dpi laser printout can create a better transfered film image.

But the idea to transfer a PCB image directly over the PCB sensibilized
board is nice and yes, will require the UV solution, but again, I don't
know
if those old plotters will give you the same "transfer technique"
resolution.

Wagner

1999\02\22@133817 by Darren Logan

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Best of luck basically.

1999\02\25@202647 by Mark A Moss

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I've seen board layouts which weren't very logical and could have used
some "sensibilization"!  Spellchecker strikes again :=-)

Mark Moss
Amateur Radio Operator, Technician, and General Tinkerer
Kalamazoo,  MI   U.S.A.



<snip>
>If you intend to use the photoplotter just to sensibilize films and
>produce
>printed circuit boards or something similar,
<snip>


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