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