Homebrew PCBs

>From: Stefan Trethan <stefan_trethan@...>
>Reply-To: Homebrew_PCBs@yahoogroups.com
>To: homebrew_pcbs@yahoogroups.com
>Subject: Re: [Homebrew_PCBs] Jetrack ink jet resist
>Date: Thu, 19 Jun 2003 14:14:53 +0200
>
>maybe try to make the inkjet just like the hp7475a plotter?
>i'm sure the motor has plenty of power (think of friction with paper).
>
>the hp type printers can be easily converted by putting a big pcb on top of
>the big transport roller.
>maybe make a guiderail in the middle to keep it parallel to ground and
>running straight.
>maybe make some counterpressure rollers on top on the sides (small
>bearings, rubber rollers).
>but be aware that in most cases the print head runs over that area so use
>flat rollers.
>
>then there is somewhere a optical sensor for paper empty/loaded.
>this can be easily used by putting it on the side in the way of the pcb.
>
>when the printer starts plotting it powers the motor until the paper
>reaches this sensor.
>simply move it on the roller with your hand then and let it be moved to the
>sensor.
>there it stops and the printing begins.

A plotter wouldn't really be accurate enough for me, but OK for initial 
experiments.


>
>i would not go for circular disign.
>the conversion (the software) would be much more effort for me than getting
>a printer modified.

The software won't be hard. Elektor had a PCB drilling machine design a few 
years ago that used the same technique.


>
>
>you can get inkjet a3 aize if you really need... but a4 would be perfect
>for pcb.
>
>
>i have modified a 550c like described above.
>it moved the big pcb desk fine, but i killed the electronics accidently.
>
>later i found out floor polish is no good in thermal bubblejet (hp type).
>
>
>it would be very nice to hear from any success with that method.
>
>this resist is uv cured?
>how long would it take to cure in a eprom eraser 8w tube source?

Not sure. That's why I want some sample ink.


>
>most interested i am in print heads, which models use piezo, which models
>use head an cartridge and which fixed head in printer.
>
>i'm not interested in buying any expensive industrial type head.
>
>which resolution do you think is needed?

The standard head for that type of ink is the Xaar XJ500 - 360 dpi - I was 
told. It looks quite expensive.

I intend to do some experimenting with an Epson printhead.

Sorry about the multiple posts, Outlook seems to do it sometimes if I edit 
on-line.

Leon
--
Leon Heller, G1HSM Tel: +44 1424 423947
Email:leon_heller@...
My web page: http://www.geocities.com/leon_heller

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