diff -r d93a721621bd -r 11f6d97f83b0 printrun-src/printrun/laser.py
--- a/printrun-src/printrun/laser.py	Fri Jun 03 10:05:45 2016 +0200
+++ b/printrun-src/printrun/laser.py	Fri Jun 03 10:06:09 2016 +0200
@@ -281,10 +281,35 @@
     def svg2gcode(self, filename, bed_max_x = 200, bed_max_y = 200, smoothness = 0.2):
         self.log("Generating paths from SVG...")        
 
-        preamble = ""
+        preamble = """
+; Filename: %s
+; GCode generated by bitplotter one-night-quick-hack script (marlin code flavour)
+; 2015/2016 by NeoSoft - Malte Bayer
+
+G21 ; Metric
+; We assume Z is in focus height and laser head is focus at bottom left of image!
+G92 X0 Y0 E0; set zero position - new origin
+G90 ; absolute positioning
+M82 ; Set extruder (laser) to absolute positioning
+M201 X1000 Y1000 E500 ; Set acceleration
+M203 X1000 Y1000 Z4 E10 ; Set max feedrate
+M209 S0 ; disable firmware retraction, we dont want to burn holes...
+M302 ; Allow cold extrudes - doesnt matter because we hack the extruder physically off with the M571 E mod
+M571 S1 E1 ; Activate Laser output on extrusion, but block real motor movement!
+G0 X0 Y0 F%d ; Set moving speed TRAVEL_SPEED
+G1 X0 Y0 F%d ; Set linear engraving speed ENGRAVE_SPEED
+
+""" % (filename, TRAVEL_SPEED, ENGRAVE_SPEED)
+        self.log("Travel/Engrave speed: %d mm/sec, %d mm/sec" % (
+            TRAVEL_SPEED / 60, ENGRAVE_SPEED / 60) )
+
         postamble = ""
         shape_preamble = "G92 E0\n"
-        shape_postamble = ""
+        shape_postamble =  """M571 S0 E0
+M501 ; undo all settings made
+
+"""
+
 
         """ 
         Used to control the smoothness/sharpness of the curves.