stupid easy line based svg to gcode converter

svg2gcode.js

// The intention here is that you load up the svg in a browser and run the following
// in the console

var
s = 1,//-0.35,
cz = 144, // cut z
sz = 142,   // safe z
materialWidth = 6, // in mm
passes = 3,
passWidth = materialWidth/passes,
feedRate = 800,
seekRate = 900,
lines = document.getElementsByTagName("line"),
scale=function(val, amt) {
  return val * amt
},
gcode = [
  'G90',
  'G1 Z' + sz,
  'G82',
  'M4'
],
i, l,
rects = document.getElementsByTagName('rect');

for (i =0, l = lines.length; i<l; i++) {
  var line = lines[i];
  for (var p = passWidth; p<=materialWidth; p+=passWidth) {
    gcode.push(['G1',
      'X' + scale(line.getAttribute('x1'), s),
      'Y' + scale(line.getAttribute('y1'), s),
      'F' + seekRate
    ].join(' '));

    gcode.push(['G1',
      'Z' + (cz + p),
      'F' + '200'
    ].join(' '));

    gcode.push(['G1',
      'X' + scale(line.getAttribute('x2'), s),
      'Y' + scale(line.getAttribute('y2'), s),
      'F' + feedRate
    ].join(' '));

    gcode.push(['G1',
      'Z' + sz,
      'F' + '300'
    ].join(' '));
  }
}

for (i =0, l = rects.length; i<l; i++) {
  var
  rect = rects[i],
  x = parseFloat(rect.getAttribute('x')),
  y = parseFloat(rect.getAttribute('y')),
  width = parseFloat(rect.getAttribute('width')),
  height = parseFloat(rect.getAttribute('height'));

  gcode.push(['G1',
    'X' + scale(x, s),
    'Y' + scale(y, s),
    'F' + seekRate
  ].join(' '));

  for (var p = passWidth; p<=materialWidth; p+=passWidth) {
    gcode.push(['G1',
      'Z' + (cz + passWidth),
      'F' + '200'
    ].join(' '));

    // top right
    gcode.push(['G1',
      'X' + scale(width + x, s),
      'Y' + scale(y, s),
      'F' + feedRate
    ].join(' '));

    // bottom right
    gcode.push(['G1',
      'X' + scale(width+x, s),
      'Y' + scale(height+y, s),
      'F' + feedRate
    ].join(' '));

    // bottom left
    gcode.push(['G1',
      'X' + scale(x, s),
      'Y' + scale(height+y, s),
      'F' + feedRate
    ].join(' '));

    // top left
    gcode.push(['G1',
      'X' + scale(x, s),
      'Y' + scale(y, s),
      'F' + feedRate
    ].join(' '));
  }

  gcode.push(['G1',
    'Z' + sz,
    'F' + '200'
  ].join(' '));
}

gcode.push('G4 P1');
gcode.push('M5');
gcode.push('G1 Z0 F300');
gcode.push('G1 X0 Y0 F800');

console.log(gcode.join('\n'))