bf46ea4804
comment diameter instead of radius for compensated profile/surface ops opensbp improved pre processor is more explicit with XY values cmake copies opensbp postprocessor. Removed unnecessary file.
210 lines
7.8 KiB
Python
210 lines
7.8 KiB
Python
# ***************************************************************************
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# * (c) sliptonic (shopinthewoods<at>gmail.com) 2014 *
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# * *
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# * This file is part of the FreeCAD CAx development system. *
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# * *
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# * This program is free software; you can redistribute it and/or modify *
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# * it under the terms of the GNU Lesser General Public License (LGPL) *
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# * as published by the Free Software Foundation; either version 2 of *
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# * the License, or (at your option) any later version. *
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# * for detail see the LICENCE text file. *
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# * *
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# * FreeCAD is distributed in the hope that it will be useful, *
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# * but WITHOUT ANY WARRANTY; without even the implied warranty of *
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# * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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# * GNU Lesser General Public License for more details. *
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# * *
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# * You should have received a copy of the GNU Library General Public *
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# * License along with FreeCAD; if not, write to the Free Software *
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# * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
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# * USA *
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# * *
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# ***************************************************************************/
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'''
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This is a preprocessor file for the Path workbench. Its aim is to
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parse the contents of a given OpenSBP file, and transform it to make it
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suitable for use in a Path object. This preprocessor, once placed in the
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appropriate PathScripts folder, can be used directly from inside FreeCAD,
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via the GUI importer or via python scripts with:
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import opensbp_pre
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opensbp_pre.insert("/path/to/myfile.ngc","DocumentName")
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DONE
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Correctly imports single axis and multi axis moves.
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Stores Jog and Feed speeds
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Appends Multiaxis Feed speed to G1 moves
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Jog rates don't append to G0 moves
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Make single axis feed rates work
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Imports CG (non-diameter) arcs.
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Handles CW and CCW spindle speeds
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if operations are preceded by a comment ('New Path ...) They are split into multiple paths
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TODO
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Many other OpenSBP commands not handled
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'''
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import FreeCAD
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import os, Path
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AXIS = 'X','Y','Z','A','B' #OpenSBP always puts multiaxis move parameters in this order
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SPEEDS = 'XY','Z','A','B'
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# to distinguish python built-in open function from the one declared below
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if open.__module__ == '__builtin__':
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pythonopen = open
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def open(filename):
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"called when freecad opens a file."
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docname = os.path.splitext(os.path.basename(filename))[0]
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doc = FreeCAD.newDocument(docname)
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insert(filename,doc.Name)
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def insert(filename,docname):
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"called when freecad imports a file"
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"This insert expects parse to return a list of strings"
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"each string will become a separate path"
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gfile = pythonopen(filename)
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gcode = gfile.read()
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gfile.close()
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gcode = parse(gcode)
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doc = FreeCAD.getDocument(docname)
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for subpath in gcode:
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obj = doc.addObject("Path::Feature","Path")
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path = Path.Path(subpath)
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obj.Path = path
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def parse(inputstring):
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"parse(inputstring): returns a list of parsed output string"
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print "preprocessing..."
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# split the input by line
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lines = inputstring.split("\n")
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return_output = []
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output = ""
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last = {'X':None,'Y':None,'Z':None,'A':None,'B':None}
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lastrapidspeed = {'XY':"50", 'Z':"50", 'A':"50", 'B':"50" } #set default rapid speeds
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lastfeedspeed = {'XY':"50", 'Z':"50", 'A':"50", 'B':"50" } #set default feed speed
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movecommand = ['G1', 'G0', 'G02', 'G03']
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for l in lines:
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# print l
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# remove any leftover trailing and preceding spaces
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l = l.strip()
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if not l:
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# discard empty lines
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continue
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if l[0] in ["'","&"]:
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# discard comment and other non strictly gcode lines
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if l[0:9] == "'New Path":
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# starting new path
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if any (x in output for x in movecommand): #make sure the path has at least one move command.
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return_output.append(output)
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output = ""
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continue
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words = [a.strip() for a in l.split(",")]
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words[0] = words[0].upper()
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if words[0] in ["J2","J3","J4","J5","M2","M3","M4","M5"]: #multi-axis jogs and moves
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if words[0][0] == 'J': #jog move
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s = "G0 "
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else: #feed move
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s = "G1 "
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speed = lastfeedspeed["XY"]
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for i in range (1, len(words)):
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if words [i] == '':
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if last[AXIS[i-1]] == None:
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continue
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else:
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s += AXIS[i-1] + last[AXIS[i-1]]
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else:
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s += AXIS[i-1] + words[i]
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last[AXIS[i-1]] = words[i]
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output += s +" F" + speed + '\n'
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if words[0] in ["JA","JB","JX","JY","JZ","MA","MB","MX","MY","MZ"]: #single axis jogs and moves
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if words[0][0] == 'J': #jog move
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s = "G0 "
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if words[0][1] in ['X','Y']:
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speed = lastrapidspeed["XY"]
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else:
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speed = lastrapidspeed[words[0][1]]
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else: #feed move
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s = "G1 "
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if words[0][1] in ['X','Y']:
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speed = lastfeedspeed["XY"]
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else:
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speed = lastfeedspeed[words[0][1]]
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last[words[0][1]] = words[1]
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output += s
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for key, val in last.iteritems():
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if val is not None:
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output += key + str(val) + " F" + speed + "\n"
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if words[0] in ["JS"]: #set jog speed
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for i in range (1, len(words)):
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if words [i] == '':
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continue
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else:
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lastrapidspeed[SPEEDS[i-1]] = words[i]
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if words[0] in ["MD"]: #move distance with distance and angle.
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#unsupported at this time
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continue
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if words[0] in ["MH"]: #move home
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#unsupported at this time
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continue
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if words[0] in ["MS"]: #set move speed
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for i in range (1, len(words)):
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if words [i] == '':
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continue
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else:
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lastfeedspeed[SPEEDS[i-1]] = words[i]
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if words[0] in ["MO"]: #motors off
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#unsupported at this time
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continue
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if words[0] in ["TR"]: #Setting spindle speed
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if float(words[1]) < 0:
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s = "M4 S"
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else:
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s = "M3 S"
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s += str(abs(float(words[1])))
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output += s + '\n'
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if words[0] in ["CG"]: #Gcode circle/arc
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if words[1] != "": # diameter mode
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print "diameter mode not supported"
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continue
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else:
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if words[7] == "1": #CW
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s = "G2"
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else: #CCW
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s = "G3"
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s += " X" + words[2] + " Y" + words[3] + " I" + words[4] + " J" + words[5] + " F" + str(lastfeedspeed["XY"])
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output += s + '\n'
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last["X"] = words[2]
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last["Y"] = words[3]
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#Make sure all appended paths have at least one move command.
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if any (x in output for x in movecommand):
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return_output.append(output)
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print "done preprocessing."
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return return_output
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print __name__ + " gcode preprocessor loaded."
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