First formal, versioned release: https://github.com/WillAdams/gcodepreview It (of course) uses: http://www.guenther-sohler.net/openscad/ and in addition to writing out G-code so as to cut files, it now has an option to write out polylines --- which may be open/unclosed. The sample/template file should be pretty-much self-explanatory (see below) and I will hopefully manage to get some more interesting things working presently. William //!OpenSCAD use <gcodepreview.py>;use <pygcodepreview.scad>;include <gcodepreview.scad>; $fa = 2;$fs = 0.125; /* [G-code] */Gcode_filename = "gcode.nc"; /* [G-code] */generategcode = true; /* [DXF] */DXF_filename = "gcode.dxf"; /* [DXF] */generatedxf = true; /* [CAM] */feedrate = 850;/* [CAM] */plungerate = 425;/* [CAM] */toolradius = 1.5875;/* [CAM] */squaretoolno = 102; /* [Feeds and Speeds] */plunge = 100;/* [Feeds and Speeds] */feed = 400;/* [Feeds and Speeds] */speed = 16000;/* [Feeds and Speeds] */square_ratio = 1.0; // [0.25:2]/* [Feeds and Speeds] */small_V_ratio = 0.75; // [0.25:2]/* [Feeds and Speeds] */large_V_ratio = 0.875; // [0.25:2] /* [Stock] */stocklength = 219;/* [Stock] */stockwidth = 150;/* [Stock] */stockthickness = 8.35;/* [Stock] */zeroheight = "Top"; // [Top, Bottom]/* [Stock] */stockorigin = "Center"; // [Lower-Left, Center-Left, Top-Left, Center]/* [Stock] */retractheight = 9; opengcodefile(Gcode_filename);opendxffile(DXF_filename); difference() {setupstock(stocklength, stockwidth, stockthickness, zeroheight, stockorigin); movetosafez(); toolchange(squaretoolno,speed * square_ratio); begintoolpath(0,0,0.25);beginpolyline(0,0,0.25); cutoneaxis_setfeed("Z",-1,plunge*square_ratio); cutwithfeed(stocklength/2,stockwidth/2,-stockthickness,feed);addpolyline(stocklength/2,stockwidth/2,-stockthickness); endtoolpath(); } closegcodefile();closedxffile(); -- Sphinx of black quartz, judge my vowhttps://designinto3d.com/