trunk/eagle/hpgl2gcode.py

@@ -0,0 +1,67 @@
+import sys
+import re
+
+#open file passed as argument
+if len(sys.argv)>1:
+ f = open(sys.argv[1],'r')
+else:
+ print('usage: python hpgl2code.py inputfile.hpgl > outputfile.gcode')
+ sys.exit(1)
+
+#decoded commands
+#PA x,y;  //pen advance xy unit=25um ie 40 units/mm
+#PU;    //pen up - replace with G1 Z'up' (safe Z heigh constant)
+#PD;    //pen down - - replace with G1 Z'dn' (engrawing depth constant)
+
+#constants
+zup=1 # 5mm should be safe enough
+zdn=0 # using 0, for engraving negative values to be used
+upm=40.2 # hpgl units per mm (in theory should be 40.2)
+epm=0 # extrude per mm - in case I'm trying to plot with PLA
+feed="3000" #default feedrate
+
+#init stuff
+print "(--------------------------------)"
+print "(-   HPGL to G-Code Converter   -)"
+print "(- (C)2016-10-12 - Paolo Iocco) -)"
+print "(--------------------------------)"
+print ""
+print "(CNC Setup)"
+print "G21" # units in mm
+print "M300 S50 (pen up)"
+print "G4 P150 (wait 150ms)"
+print "G1 X0.000 Y0.000 F"+feed
+print "(Plots a point in 0,0)"
+print "M300 S30 (pen down)"
+print "G4 P150 (wait 150ms)"
+print "M300 S50 (pen up)"
+print "G4 P150 (wait 150ms)"
+print "(-------------)"
+print "(-   Start   -)"
+print "(-------------)"
+
+#process the input file
+pa = re.compile('^PA ([0-9]*),([0-9]*);') #regex for parsing PA command
+for line in f:
+ if re.search('^PA',line):
+  #parse a bit
+  mpa=pa.match(line);
+  x=float(mpa.group(1))/upm
+  y=float(mpa.group(2))/upm
+  print "G1 X"+"%.3f" % x," Y"+"%.3f" %y," F"+feed
+ else:
+  if re.search('^PU',line ):
+   #print "G1 Z",zup," F"+feed
+   print "M300 S50 (pen up)"
+   print "G4 P150 (wait 150ms)"
+  else:
+   if re.search('^PD',line ):
+    #print "G1 Z",zdn," F"+feed
+	print "M300 S30 (pen down)"
+	print "G4 P150 (wait 150ms)"
+print ""
+print "(-----------)"
+print "(-   End   -)"
+print "(-----------)"
+print "G1 X0.00 Y0.00 F500.0 (Go Home)"
+