# *************************************************************************** # * Copyright (c) 2018 sliptonic * # * * # * This file is part of the FreeCAD CAx development system. * # * * # * This program is free software; you can redistribute it and/or modify * # * it under the terms of the GNU Lesser General Public License (LGPL) * # * as published by the Free Software Foundation; either version 2 of * # * the License, or (at your option) any later version. * # * for detail see the LICENCE text file. * # * * # * FreeCAD is distributed in the hope that it will be useful, * # * but WITHOUT ANY WARRANTY; without even the implied warranty of * # * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * # * GNU Lesser General Public License for more details. * # * * # * You should have received a copy of the GNU Library General Public * # * License along with FreeCAD; if not, write to the Free Software * # * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * # * USA * # * * # *************************************************************************** import FreeCAD from FreeCAD import Units import Path import argparse import datetime import shlex import Path.Post.Utils as PostUtils import PathScripts.PathUtils as PathUtils from builtins import open as pyopen TOOLTIP = """ This is a postprocessor file for the Path workbench. It is used to take a pseudo-G-code fragment outputted by a Path object, and output real G-code suitable for a jtech photonics laser. This postprocessor, once placed in the appropriate PathScripts folder, can be used directly from inside FreeCAD, via the GUI importer or via python scripts with: import jtech_post jtech_post.export(object,"/path/to/file.ngc","") """ now = datetime.datetime.now() parser = argparse.ArgumentParser(prog="jtech", add_help=False) parser.add_argument("--no-header", action="store_true", help="suppress header output") parser.add_argument("--no-comments", action="store_true", help="suppress comment output") parser.add_argument("--line-numbers", action="store_true", help="prefix with line numbers") parser.add_argument( "--no-show-editor", action="store_true", help="don't pop up editor before writing output", ) parser.add_argument("--precision", default="3", help="number of digits of precision, default=3") parser.add_argument( "--preamble", help='set commands to be issued before the first command, default="M05 S0\nG90"', ) parser.add_argument( "--postamble", help='set commands to be issued after the last command, default="M05 S0\nM2"', ) parser.add_argument( "--inches", action="store_true", help="Convert output for US imperial mode (G20)" ) parser.add_argument( "--modal", action="store_true", help="Output the Same G-command Name USE NonModal Mode", ) parser.add_argument("--axis-modal", action="store_true", help="Output the Same Axis Value Mode") parser.add_argument( "--power-on-delay", default="255", help="milliseconds - Add a delay after laser on before moving to pre-heat material. Default=0", ) TOOLTIP_ARGS = parser.format_help() # These globals set common customization preferences OUTPUT_COMMENTS = True OUTPUT_HEADER = True OUTPUT_LINE_NUMBERS = False SHOW_EDITOR = True MODAL = False # if true commands are suppressed if the same as previous line. OUTPUT_DOUBLES = True # if false duplicate axis values are suppressed if the same as previous line. COMMAND_SPACE = " " LINENR = 100 # line number starting value # These globals will be reflected in the Machine configuration of the project UNITS = "G21" # G21 for metric, G20 for us standard UNIT_SPEED_FORMAT = "mm/min" UNIT_FORMAT = "mm" MACHINE_NAME = "JTECH Photonic Laser" PRECISION = 3 # Preamble text will appear at the beginning of the GCODE output file. PREAMBLE = """M05 S0 G90 """ # Postamble text will appear following the last operation. POSTAMBLE = """M05 S0 M2 """ PRE_FEED = """M03 G4 P{} """ POST_FEED = """M05 """ # Pre operation text will be inserted before every operation PRE_OPERATION = """""" # Post operation text will be inserted after every operation POST_OPERATION = """""" # Tool Change commands will be inserted before a tool change TOOL_CHANGE = """""" POWER_ON_DELAY = 0 def processArguments(argstring): global OUTPUT_HEADER global OUTPUT_COMMENTS global OUTPUT_LINE_NUMBERS global SHOW_EDITOR global PRECISION global PREAMBLE global POSTAMBLE global UNITS global UNIT_SPEED_FORMAT global UNIT_FORMAT global MODAL global OUTPUT_DOUBLES global POWER_ON_DELAY try: args = parser.parse_args(shlex.split(argstring)) if args.no_header: OUTPUT_HEADER = False if args.no_comments: OUTPUT_COMMENTS = False if args.line_numbers: OUTPUT_LINE_NUMBERS = True if args.no_show_editor: SHOW_EDITOR = False print("Show editor = %d" % SHOW_EDITOR) PRECISION = args.precision if args.preamble is not None: PREAMBLE = args.preamble if args.postamble is not None: POSTAMBLE = args.postamble if args.inches: UNITS = "G20" UNIT_SPEED_FORMAT = "in/min" UNIT_FORMAT = "in" PRECISION = 4 if args.modal: MODAL = True if args.axis_modal: OUTPUT_DOUBLES = False POWER_ON_DELAY = float(args.power_on_delay) / 1000 # milliseconds except Exception: return False return True def export(objectslist, filename, argstring): if not processArguments(argstring): return None for obj in objectslist: if not hasattr(obj, "Path"): print( "the object " + obj.Name + " is not a path. Please select only path and Compounds." ) return None print("postprocessing...") gcode = "" # write header if OUTPUT_HEADER: gcode += linenumber() + "(Exported by FreeCAD)\n" gcode += linenumber() + "(Post Processor: " + __name__ + ")\n" gcode += linenumber() + "(Output Time:" + str(now) + ")\n" # Write the preamble if OUTPUT_COMMENTS: gcode += linenumber() + "(begin preamble)\n" for line in PREAMBLE.splitlines(False): gcode += linenumber() + line + "\n" gcode += linenumber() + UNITS + "\n" for obj in objectslist: # do the pre_op if OUTPUT_COMMENTS: gcode += linenumber() + "(begin operation: %s)\n" % obj.Label for line in PRE_OPERATION.splitlines(True): gcode += linenumber() + line gcode += parse(obj) # do the post_op if OUTPUT_COMMENTS: gcode += linenumber() + "(finish operation: %s)\n" % obj.Label for line in POST_OPERATION.splitlines(True): gcode += linenumber() + line # do the post_amble if OUTPUT_COMMENTS: gcode += "(begin postamble)\n" for line in POSTAMBLE.splitlines(True): gcode += linenumber() + line if FreeCAD.GuiUp and SHOW_EDITOR: dia = PostUtils.GCodeEditorDialog() dia.editor.setText(gcode) result = dia.exec_() if result: final = dia.editor.toPlainText() else: final = gcode else: final = gcode print("done postprocessing.") if not filename == "-": gfile = pyopen(filename, "wb") gfile.write(final) gfile.close() return final def linenumber(): global LINENR if OUTPUT_LINE_NUMBERS is True: LINENR += 10 return "N" + str(LINENR) + " " return "" def parse(pathobj): out = "" lastcommand = None precision_string = "." + str(PRECISION) + "f" currLocation = {} # keep track for no doubles RAPID_MOVES = ["G0", "G00"] FEED_MOVES = ["G1", "G01", "G2", "G02", "G3", "G03"] # the order of parameters params = [ "X", "Y", "Z", "A", "B", "C", "I", "J", "F", "S", "T", "Q", "R", "L", "H", "D", "P", ] firstmove = Path.Command("G0", {"X": -1, "Y": -1, "Z": -1, "F": 0.0}) currLocation.update(firstmove.Parameters) # set First location Parameters if hasattr(pathobj, "Group"): # We have a compound or project. for p in pathobj.Group: out += parse(p) return out else: # parsing simple path # groups might contain non-path things like stock. if not hasattr(pathobj, "Path"): return out for c in PathUtils.getPathWithPlacement(pathobj).Commands: outstring = [] command = c.Name controlstring = "" if command in FEED_MOVES and lastcommand in RAPID_MOVES: controlstring = PRE_FEED.format(POWER_ON_DELAY) elif command in RAPID_MOVES and lastcommand in FEED_MOVES: controlstring = POST_FEED if len(controlstring) > 0: out += controlstring outstring.append(command) # if modal: suppress the command if it is the same as the last one if MODAL is True: if command == lastcommand: outstring.pop(0) if c.Name[0] == "(" and not OUTPUT_COMMENTS: # command is a comment continue # Now add the remaining parameters in order for param in params: if param in c.Parameters: if param == "F" and ( currLocation[param] != c.Parameters[param] or OUTPUT_DOUBLES ): if c.Name not in RAPID_MOVES: # linuxcnc doesn't use rapid speeds speed = Units.Quantity(c.Parameters["F"], FreeCAD.Units.Velocity) if speed.getValueAs(UNIT_SPEED_FORMAT) > 0.0: outstring.append( param + format( float(speed.getValueAs(UNIT_SPEED_FORMAT)), precision_string, ) ) else: continue elif param == "T": outstring.append(param + str(int(c.Parameters["T"]))) elif param == "H": outstring.append(param + str(int(c.Parameters["H"]))) elif param == "D": outstring.append(param + str(int(c.Parameters["D"]))) elif param == "S": outstring.append(param + str(int(c.Parameters["S"]))) else: if ( (not OUTPUT_DOUBLES) and (param in currLocation) and (currLocation[param] == c.Parameters[param]) ): continue else: pos = Units.Quantity(c.Parameters[param], FreeCAD.Units.Length) outstring.append( param + format(float(pos.getValueAs(UNIT_FORMAT)), precision_string) ) # store the latest command lastcommand = command currLocation.update(c.Parameters) # Check for Tool Change: if command == "M6": continue if command == "message": if OUTPUT_COMMENTS is False: out = [] else: outstring.pop(0) # remove the command # prepend a line number and append a newline if len(outstring) >= 1: if OUTPUT_LINE_NUMBERS: outstring.insert(0, (linenumber())) # append the line to the final output for w in outstring: out += w + COMMAND_SPACE out = out.strip() + "\n" return out # print(__name__ + " gcode postprocessor loaded.")