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Subject: Re: [Homebrew_PCBs] floor polish

From: Stefan Trethan <stefan_trethan@...>
Date: 2003-05-14

yes, try as ink

i hope it works also if thicker

i have no need for the inkjet since several years.


please look here: http://groups.yahoo.com/group/Homebrew_PCBs/message/994
and http://groups.yahoo.com/group/Homebrew_PCBs/message/965 and followups.


please have a look at the posts to get up to date.

then i look forward to discuss this further..

i also managed to get 3 empty ink cartridges (with print head) from a guy at a local
computer forum. he sends it away tomorrow.


the most difficult thing i face is adjusting the head hight over pcb with modified printer.
i now think i have to make this a fixed height.

i have a deskjet550c.

this is a printer which wraps the paper around in normal mode.
but it isn't too difficult to modify.

i simply make it like the 7574a plotter.
i move the pcb in the y axis. so ot is much easier.

i simply put a large piece of clad over the rollers which normaly wrap the paper.
of course i had to teke of the metal sheet paper guide.
also to cut a piece of the frame.


now i only have to put a horizontal guide for the plate to keep it straight and to raise the print head
up (because pcb is thicker). or i lower the roller. (which is easier).

the pcb plate is pressed down onto the rubber wheels of the paper transport roller by 2 small wheels on
the side (like in the plotter).

a adjustable head height would be fine (pivoting down the transport roller around the center of the
driving gear would be easy) but then the horizontal guide also has to be lowered.



regards
stefan






14.05.2003 19:09:59, Ned Konz <ned@...> wrote:

>On Wednesday 14 May 2003 05:03 am, Stefan Trethan wrote:
>> today i saw floor polish at a local shop.
>> i remembered the post of using it as etch resist. (in inkjet).
>> so i thought i may try the printing with it (facing problems with
>> hpgl file generation to plot etc, etc.)
>
>I may have missed this.
>
>Do you mean to actually try to use floor polish as an "ink"?
>
>How will your inkjet deal with the different (higher) viscosity of the
>polish and its tendency to clog?
>
>I hope you never try to use the inkjet for anything else again...
>--
>Ned Konz
>http://bike-nomad.com
>GPG key ID: BEEA7EFE
>
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