Homebrew PCBs

hi

thanks for the info.
i already knew your page but my ? spanish ? is very close to zero.

i am downloading the plotter.zip at the moment.
also the dll.

ok..

i startet the program..

does it only open plt files?

i already have some plt viewers. i would need something to convert image format or printer format to 
plt.

you program is very nice. it shows up a bit "quick" on terminating on my xp but it works fine.

ok, i think this is not exactly what i need but it would serve as a plt viewer very fine.

thank you..

regards
stefan




15.05.2003 12:35:41, "Pancary" <pancary@...> wrote:

>hi , i made a prg work with plt files, download at www.geocities.com\pancary
>
>----- Original Message -----
>From: Stefan Trethan <stefan_trethan@...>
>To: <Homebrew_PCBs@yahoogroups.com>
>Sent: Tuesday, May 13, 2003 4:02 AM
>Subject: Re: RE: [Homebrew_PCBs] HPGL output (was PCB design software)
>
>
>> ah i see, i see.
>>
>> if you have this very handy function in eagle this makes the thing a lot
>easier.
>>
>> i think this may also be there for making copper plains, determining
>design rule violations, etc.
>> this would simplify the overall thing.
>> my thought was the whole time how the hell can i tell that 2 arcs,
>different sizes are from one pad and
>> not 2 differtent pads. also when calculating the coordinates this would
>not be too easy to tell.
>>
>>
>> which shape has the tip of your scretching tool?
>>
>> have you any results ready to meke a picture?
>> i would be very interested in it.
>>
>> regards
>> stefan
>>
>> 12.05.2003 22:25:44, Brian Schmalz <brian.s@...> wrote:
>>
>> >> nice to see there has one done the "scratch 'n etch" tool i
>> >> asked a few days ago.
>> >
>> >Yes, it does work OK - and for me I only need OK, not great. Super
>> >easy/cheap way to try out a board to get all the bugs out.
>> >
>> >> how do you detect when a line is on the outside of a
>> >> trace/pad and when a line/arc is the outermost?
>> >> so you can tell what actually is the outline?
>> >
>> >I had to use some really crazy tricks of the ULP (User Language Program)
>in
>> >Eagle. What the program does is use a command in Eagle that will draw
>lines
>> >around all of the existing traces. You pass this command a 'distance',
>and
>> >it computes the correct lines based upon that distance from the nets. So
>my
>> >ULP calls itself repeatedly (recursion) with increasing values of the
>> >'distance'. So if I want at least 50mils of space around each net, and my
>> >scratch tip is 5mil wide, the program will call itself 9 times, starting
>> >with a distance of 2.5 mil, and advancing up to 47.5 mil for the
>distance,
>> >generating a whole series of lines each run. I just execute for 'x'
>number
>> >of times, and that gives the proper number of concentric lines.
>> >
>> >> i first thought of plotting the layer with the drill drawing
>> >> on it to get the holes "punched".
>> >> i'm really wondering how you can tell when a line is only a
>> >> fill line and when it is a outline.
>> >
>> >To me there's no difference. I never 'plot' the real artwork in any way -
>> >the ULP just goes through the Eagle database of nets and draws lines
>around
>> >each net. The nets are never drawn into the HGPL file, so there's never a
>> >need to know the difference. I understand your question, I think, and if
>I
>> >was starting with just plain artwork (like what a printer would print
>from
>> >what's on the screen of a board file) then you're right, I'd have a big
>> >problem.
>> >
>> >> how is the match on the edges of tracks? i know one in
>> >> australia who has written a similar tool but for
>> >
>> >Ahh. Now there's the rub. ;-) The match is terrible because the
>scratching
>> >tip is drawn along by the plotter, and so is always 'following' the
>desired
>> >point of contact. So what I do is I draw each 'line' twice, without
>lifting
>> >the pen from the board between lines. (Each 'line' is actually a long
>series
>> >of lines that forms a closed polygon that totally rings each net.)
>> >
>> >*Brian
>> >
>> >
>> >
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>> >
>>
>>
>>
>>
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