Subject:
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Re: Building a Postscript printer?
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Newsgroups:
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lugnet.robotics
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Date:
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Sat, 24 Jun 2000 20:15:11 GMT
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Viewed:
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841 times
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Thanks! I grabbed the HPGL info from wotsit.org.
Looking around for Postscript->HPGL converters, I found the following:
<ul>
<li> <a
href="http://www.geocities.com/SiliconValley/Network/1958/pstoedit/">Pstoedit</a>:
converts Postscript and PDF into lots of other vector formats (including
HPGL). Source code available. This is probably what I'm going to start with.
<li> The Graphics Connection from <a href="www.square1.nl">Square 1</a>.
Converts Postscript into a variety of vector/raster formats. Commercial,
with demo available.
<li> Opium from Streaming Tech Inc, commercial Postscript->vector-format
converter, contact: info@sti.fi
</ul>
Looking around the newsgroup, I found some posts talking about stepper
motors (including that cool LEGO-only motor). So what is the consensus
then? Can we control a stepper motor using LegOS+hacking or can we
do it with the standard firmware? I'm also clueless about the difference between
a servo and a stepper.
Manoj
In lugnet.robotics, Andy Gombos writes:
> There is an online version of the manual(at least part of it--the important
> parts) available at Wotsit www.wotsit.org. Go to printer formats. There is
> several formats listed, including PCL and HP-GL/2.
>
> Andy
>
> Manoj Plakal wrote:
>
> > Yup, that was pretty much what I was planning to do. Hack Ghostscript
> > into something to generate a sequence of vector commands to drive
> > the RCX.
> >
> > I was searching for information on a Postscript->HPGL/PCL converter myself
> > since that is basically what I am doing here. Only problem is that the RCX
> > is going to be a relatively primitive renderer in terms of resolution etc,
> > compared
> > to the average HPGL-speaking plotter.
> >
> > Also, it looks like stepper motors are going to be required (I think). I
> > will search the newsgroup for more info, but is it a problem to control
> > stepper motors with
> > the RCX?
> >
> > If possible, could I get hold of the source code for the converter you wrote?
> > Also, is there a good reference for HPGL apart from the HP-provided printer
> > manual which I may not be able to lay hands on?
> >
> > Thanks,
> > Manoj
> >
> > In lugnet.robotics, "Chris Osborn" <fozztexx@fozztexx.com> writes:
> > > On Jun. 23 00, 11:35 PDT, "Manoj Plakal" <plakal@no-spam.cs.wisc.edu>
> > > wrote:
> > > You're going to want to use GhostScript for your PostScript
> > > interpreter. It already does a good job of interpreting PostScript,
> > > so you don't have to write one from the ground up. Then all you
> > > have to do is put definitions into the main dictionary that redefine
> > > the basic set of functions to instead output the vectors that should
> > > be plotted to a file or stdout.
> > >
> > > =46rom there your PC can just chew through the list of vectors and
> > > tell the RCX what to do.
> > >
> > > This is essentially the method I used to turn my HPGL plotter into
> > > a PostScript plotter.
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Message has 1 Reply:
 | | Re: Building a Postscript printer?
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| (...) between (...) Let's try a little "metaphor". Not technically correct, maybe, but we'll see : 1. servo motor ---...--- A servo motor is esentially an "analogic" device : you have to provide him with a pulse width modulated signal. The signal (...) (24 years ago, 27-Jun-00, to lugnet.robotics)
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Message is in Reply To:
| | Re: Building a Postscript printer?
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| There is an online version of the manual(at least part of it--the important parts) available at Wotsit www.wotsit.org. Go to printer formats. There is several formats listed, including PCL and HP-GL/2. Andy (...) (24 years ago, 24-Jun-00, to lugnet.robotics)
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