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