To my knowledge GIMP does not support laser engraving machines like
Legend Helix 24 Laser.

The spesifications for Legend Helix 24 Laser:

There exists a backend named epilog-cups for the legend brand of
engravers/lasers, but it seems fiddly to use and no GUI or PPD files
exists to my knowledge. I think that the epilog-cups backend only works
with inkscape, but i am unsure because i dont have a Legend laser so i
cannot test it. 

At present state, the user of epilog-cups needs to set up and make a
printer for each typer of material. 

That has some advantages, but the power and resolution and speed
apparently cannot be adjusted with ease. Anyway, it should be
possible to add a suitable plugin with a GUI that can store the
settings for a type of material.  

1mm beech plywood, cutting.
Ti6Al4V (titanium,polished) engraving

epilog-cups is located here + some info on how to set it up:
cups-epilog.c is here:

The AS220 CUPS-Epilog driver converts postscript input into a .PJL file, that 
is sent to the Laser Cutter/engraver. Apparently the Epilog uses this HP 
printer control language!
 ( source= )

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.

information on cups-epilog follows:

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 Auto focus (0=no, 1=yes)
 af optimise vectors (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
 ov Re-order vectors to reduce time
 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.

It seems to me that the epilog-cups does not support 3D engraving.
3D mode looks at the dots and the dot patterns in a very different way than 
Basic raster engraving mode, especially where it concerns either color, or 
grayscale images.

In 3D mode, instead of looking at the dots and determining where to fire the 
laser based on the dot spacing, Epilog Laser look at the dots and determine how 
much laserpower (wattage) to apply to each dot, and that’s the big difference 
between Basic raster engraving mode and 3D. In Basic raster engraving mode, 
every dot is fired at the same laser output (wattage). In 3D mode machine have 
the ability to adjust the laser output for every dot.

An additional aspect of 3D mode is that, unlike Basic mode, the laser
fires continuously between most dots – even if it is engraving from a
10% fill pattern to a 30% fill pattern. This is by design so there is a
gradual change in the depth of engraving when the artwork transitions
from one shade of gray to another. The only time that this is not true
is when the artwork changes from 100% black to 100% white (or visa

Any opinions ?

Håken Hveem
PGP/GPG Key ID : 0CD02A30
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