Original source: http://mtm.cba.mit.edu/cups/cups-epilog/src/cups-epilog.c
CUPS driver for the Epilog Laser engraver
Works on:
- Epilog Mini 18 Laser
Does NOT Work
- Epilog Legend32 Laser
Description:
Epilog laser engraver
The Epilog laser engraver comes with a windows printer driver. This works
well with Corel Draw, and that is about it. There are other windows
applications, like inkscape, but these rasterise the image before sending to
the windows printer driver, so there is no way to use them to vector cut!
The cups-epilog app is a cups backend, so build and link/copy to
/usr/lib/cups/backend/epilog. It allows you to print postscript to the laser
and both raster and cut. It works well with inkscape.
With this linux driver, vector cutting is recognised by any line or curve in
100% red (1.0 0.0 0.0 setrgbcolor).
Create printers using epilog://host/Legend/options where host is the
hostname or IP of the epilog engraver. The options are as follows. This
allows you to make a printer for each different type of material.
af Auto focus (0=no, 1=yes)
r Resolution 75-1200
rs Raster speed 1-100
rp Raster power 0-100
vs Vector speed 1-100
vp Vector power 1-100
vf Vector frequency 10-5000
sc Photograph screen size in pizels, 0=threshold, +ve=line, -ve=spot, used
in mono mode, default 8.
rm Raster mode mono/grey/colour
The mono raster mode uses a line or dot screen on any grey levels or
colours. This can be controlled with the sc parameter. The default is 8,
which makes a nice fine line screen on 600dpi engraving. At 600/1200 dpi,
the image is also lightened to allow for the size of the laser point.
The grey raster mode maps the grey level to power level. The power level is
scaled to the raster power setting (unlike the windows driver which is
always 100% in 3D mode).
In colour mode, the primary and secondary colours are processed as separate
passes, using the grey level of the colour as a power level. The power level
is scaled to the raster power setting. Note that red is 100% red, and non
100% green and blue, etc, so 50% red, 0% green/blue is not counted as red,
but counts as "grey". 100% red, and 50% green/blue counts as red, half
power. This means you can make distinct raster areas of the page so that you
do not waste time moving the head over blank space between them.
Epolog cups driver
Uses gs to rasterise the postscript input.
URI is epilog://host/Legend/options
E.g. epilog://host/Legend/rp=100/rs=100/vp=100/vs=10/vf=5000/rm=mono/flip/af
Options are as follows, use / to separate :-
rp Raster power
rs Raster speed
vp Vector power
vs Vector speed
vf Vector frequency
w Default image width (pt)
h Default image height (pt)
sc Screen (lpi = res/screen, 0=simple threshold)
r Resolution (dpi)
af Auto focus
rm Raster mode (mono/grey/colour)
flip X flip (for reverse cut)
Raster modes:-
mono Screen applied to grey levels
grey Grey levels are power (scaled to raster power setting)
colour Each colour grey/red/green/blue/cyan/magenta/yellow plotted
separately, lightness=power
Installation:
gcc -o epilog `cups-config --cflags` cups-epilog.c `cups-config --libs`
http://www.cups.org/documentation.php/api-overview.html
Manual testing can be accomplished through execution akin to:
$ export DEVICE_URI="epilog://epilog-mini/Legend/rp=100/rs=100/vp=100/vs=10/vf=5000/rm=grey"
$ ./epilog 123 jdoe test 1 options < hello-world.ps