591 lines
21 KiB
Python
591 lines
21 KiB
Python
# ***************************************************************************
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# * Copyright (c) 2014 sliptonic <shopinthewoods@gmail.com> *
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# * *
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# * Reabased changes from relative_post.py to linuxcnc_post.py *
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# * and updated functionality for old EDM machines by alromh87 *
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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 Wire EDM CNC. 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 wedm_post
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wedm_post.export(object,"/path/to/file.ncc","")
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"""
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now = datetime.datetime.now()
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parser = argparse.ArgumentParser(prog="wedm", 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(
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"--comments-character", default="", help="Use provided character before comments"
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)
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parser.add_argument(
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"--command-space", default=" ", help="Use provided character as space in commands"
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)
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parser.add_argument("--endline-character", default="", help="Use provided character at end of line")
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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("--scale", default="1", help="Scale factor for coordinates")
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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("--fixed-length", default="0", help="use fixed length coordinates, default=0")
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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="G17\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\nG17 G90\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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"--no-tlo",
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action="store_true",
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help="suppress tool length offset (G43) following tool changes",
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)
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parser.add_argument(
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"--use-rapids",
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action="store_true",
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help="Allow G0 on output",
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)
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parser.add_argument(
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"--omit-units",
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action="store_true",
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help="Don't output units G20/G21",
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)
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parser.add_argument("--relative", action="store_true", help="Generate Relative GCODE")
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parser.add_argument(
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"--two-digit-codes",
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action="store_true",
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help="Add trailing 0 to codes lower than 10 (G1 -> G01)",
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)
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parser.add_argument("--force-sign", action="store_true", help="Always add sign to coordinates")
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parser.add_argument(
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"--ignore-operations",
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default="",
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help="Ignore provided operations, use Labels and separate with ','",
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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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COMMENT_CHAR = ""
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COMMAND_SPACE = " "
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ENDLINE = ""
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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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USE_TLO = True # if true G43 will be output following tool changes
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OUTPUT_DOUBLES = True # if false duplicate axis values are suppressed if the same as previous line.
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LINENR = 100 # line number starting value
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USE_RAPIDS = False
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OMIT_UNITS = False
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RELATIVE_GCODE = False
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TWO_DIGIT_CODES = False
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FORCE_SIGN = False
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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 = "Wire EDM"
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CORNER_MIN = {"x": 0, "y": 0, "z": 0}
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CORNER_MAX = {"x": 500, "y": 300, "z": 300}
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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 = """G17 G54 G40 G49 G80 G90
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"""
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# Postamble text will appear following the last operation.
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POSTAMBLE = """M05
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G17 G54 G90 G80 G40
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M2
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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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def processArguments(argstring):
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global OUTPUT_HEADER
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global OUTPUT_COMMENTS
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global COMMENT_CHAR
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global COMMAND_SPACE
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global ENDLINE
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global OUTPUT_LINE_NUMBERS
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global SHOW_EDITOR
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global SCALE
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global PRECISION
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global FIXED_LENGTH
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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 USE_TLO
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global OUTPUT_DOUBLES
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global LOCATION # keep track for incremental
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global USE_RAPIDS
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global OMIT_UNITS
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global RELATIVE_GCODE
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global TWO_DIGIT_CODES
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global FORCE_SIGN
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global IGNORE_OPERATIONS
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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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COMMENT_CHAR = args.comments_character
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COMMAND_SPACE = args.command_space
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ENDLINE = args.endline_character
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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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SCALE = int(args.scale)
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PRECISION = args.precision
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FIXED_LENGTH = int(args.fixed_length)
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if args.preamble is not None:
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PREAMBLE = args.preamble.replace("\\n", "\n")
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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.no_tlo:
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USE_TLO = False
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if args.axis_modal:
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OUTPUT_DOUBLES = False
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if args.use_rapids:
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USE_RAPIDS = True
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if args.omit_units:
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OMIT_UNITS = True
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if args.relative:
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print("relative")
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RELATIVE_GCODE = True
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# PREAMBLE = PREAMBLE.replace("G90", "")
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# PREAMBLE = PREAMBLE.replace("G91", "")
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PREAMBLE += "\nG91"
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LOCATION = {"X": 0, "Y": 0, "Z": 0}
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if args.two_digit_codes:
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TWO_DIGIT_CODES = True
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if args.force_sign:
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FORCE_SIGN = True
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IGNORE_OPERATIONS = args.ignore_operations.split(",")
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except Exception as e:
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print(e)
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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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global UNITS
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global UNIT_FORMAT
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global UNIT_SPEED_FORMAT
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global MACHINE_NAME
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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() + COMMENT_CHAR + "(Exported by FreeCAD)\n"
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gcode += linenumber() + COMMENT_CHAR + "(Post Processor: " + __name__ + ")\n"
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gcode += linenumber() + COMMENT_CHAR + "(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() + COMMENT_CHAR + "(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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if not OMIT_UNITS:
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gcode += linenumber() + UNITS + ENDLINE + "\n"
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for obj in objectslist:
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# Skip inactive operations
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if hasattr(obj, "Active"):
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if not obj.Active:
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continue
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if hasattr(obj, "Base") and hasattr(obj.Base, "Active"):
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if not obj.Base.Active:
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continue
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# fetch machine details
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job = PathUtils.findParentJob(obj)
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# TODO: Not sure of the use
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if hasattr(job, "MachineName"):
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MACHINE_NAME = job.MachineName
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if hasattr(job, "MachineUnits"):
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print(job.MachineUnits)
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if job.MachineUnits == "Metric":
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UNITS = "G21"
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UNIT_FORMAT = "mm"
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UNIT_SPEED_FORMAT = "mm/min"
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else:
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UNITS = "G20"
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UNIT_FORMAT = "in"
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UNIT_SPEED_FORMAT = "in/min"
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# ignore selected operations
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if obj.Label in IGNORE_OPERATIONS:
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continue
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# do the pre_op
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if OUTPUT_COMMENTS:
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gcode += linenumber() + COMMENT_CHAR + "(begin operation: %s)\n" % obj.Label
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gcode += (
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linenumber()
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+ COMMENT_CHAR
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+ "(machine: %s, %s)\n" % (MACHINE_NAME, UNIT_SPEED_FORMAT)
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)
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for line in PRE_OPERATION.splitlines(True):
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gcode += linenumber() + line
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# get coolant mode
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coolantMode = "None"
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if hasattr(obj, "CoolantMode") or hasattr(obj, "Base") and hasattr(obj.Base, "CoolantMode"):
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if hasattr(obj, "CoolantMode"):
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coolantMode = obj.CoolantMode
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else:
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coolantMode = obj.Base.CoolantMode
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# turn coolant on if required
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if OUTPUT_COMMENTS:
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if not coolantMode == "None":
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gcode += linenumber() + COMMENT_CHAR + "(Coolant On:" + coolantMode + ")\n"
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if coolantMode == "Flood":
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gcode += linenumber() + "M8" + "\n"
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if coolantMode == "Mist":
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gcode += linenumber() + "M7" + "\n"
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# process the operation gcode
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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() + COMMENT_CHAR + "(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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# turn coolant off if required
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if not coolantMode == "None":
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if OUTPUT_COMMENTS:
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gcode += linenumber() + COMMENT_CHAR + "(Coolant Off:" + coolantMode + ")\n"
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gcode += linenumber() + "M9" + "\n"
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# do the post_amble
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if OUTPUT_COMMENTS:
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gcode += linenumber() + COMMENT_CHAR + "(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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final = gcode
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if len(gcode) > 100000:
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print("Skipping editor since output is greater than 100kb")
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else:
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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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print("done postprocessing.")
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if not filename == "-":
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gfile = pyopen(filename, "w")
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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) + COMMAND_SPACE
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return ""
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def parse(pathobj):
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global PRECISION
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global MODAL
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global OUTPUT_DOUBLES
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global UNIT_FORMAT
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global UNIT_SPEED_FORMAT
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global RELATIVE_GCODE
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global LOCATION
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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 incremental
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# the order of parameters
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# linuxcnc doesn't want K properties on XY plane Arcs need work.
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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": 0, "Y": 0, "Z": 0, "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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# if OUTPUT_COMMENTS:
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# out += linenumber() + COMMENT_CHAR + "(compound: " + pathobj.Label + ")\n"
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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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# if OUTPUT_COMMENTS:
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# out += linenumber() + COMMENT_CHAR + "(" + pathobj.Label + ")\n"
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for c in PathUtils.getPathWithPlacement(pathobj).Commands:
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# For Debug Only
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# if OUTPUT_COMMENTS:
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# out += linenumber() + COMMENT_CHAR + "(" + str(c) + ")\n"
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outstring = []
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command = c.Name
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if not USE_RAPIDS and (command == "G0" or command == "G00"):
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command = "G1"
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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 command[0] == "(": # command is a comment
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if OUTPUT_COMMENTS: # Edit comment with COMMENT_CHAR
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outstring.insert(0, COMMENT_CHAR)
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else:
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continue
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move_comands = ["G0", "G00", "G1", "G01"]
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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 command not in [
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"G0",
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"G00",
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]: # 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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# For wire EDM we ignore values for Z
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elif param == "Z":
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continue
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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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if RELATIVE_GCODE and (param != "I" and param != "J"):
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pos = Units.Quantity(
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c.Parameters[param] - currLocation[param], FreeCAD.Units.Length
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)
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print(
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f"currlocation: {currLocation[param]} param: {c.Parameters[param]} pos: {pos}"
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)
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if pos == 0:
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# Remove no movement
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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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pos = pos * SCALE
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sign = ""
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if pos >= 0 and FORCE_SIGN:
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sign = "+"
|
|
|
|
stringout = sign + format(
|
|
float(pos.getValueAs(UNIT_FORMAT)), precision_string
|
|
)
|
|
|
|
# Remove unneeded 0s on incremental moves this is needed since some numbers are zero only after applying precision
|
|
if (
|
|
RELATIVE_GCODE
|
|
and command in move_comands
|
|
and (float(stringout) == 0)
|
|
):
|
|
continue
|
|
# Force trailing zeros
|
|
if FIXED_LENGTH > 0:
|
|
extra = 1 if stringout[0] in ["+", "-"] else 0
|
|
stringout = stringout.zfill(FIXED_LENGTH + extra)
|
|
outstring.append(param + stringout)
|
|
|
|
currLocation.update(c.Parameters)
|
|
|
|
# Check for Tool Change:
|
|
if command == "M6":
|
|
# stop the spindle
|
|
out += linenumber() + "M5\n"
|
|
for line in TOOL_CHANGE.splitlines(True):
|
|
out += linenumber() + line
|
|
|
|
# add height offset
|
|
if USE_TLO:
|
|
tool_height = "\nG43 H" + str(int(c.Parameters["T"]))
|
|
outstring.append(tool_height)
|
|
|
|
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 len(outstring) == 1 and (outstring[0] == "G0" or outstring[0] == "G1"):
|
|
# Don't write empty moves (Generated when Z moves are ignored for EDM)
|
|
print("Ignoring: " + command + ":" + outstring[0])
|
|
continue
|
|
if TWO_DIGIT_CODES and len(command) == 2 and outstring[0] == command:
|
|
outstring[0] = command[0] + "0" + command[1]
|
|
if OUTPUT_LINE_NUMBERS:
|
|
outstring.insert(0, (linenumber()))
|
|
|
|
# append the line to the final output
|
|
start = True
|
|
for w in outstring:
|
|
if start:
|
|
start = False
|
|
else:
|
|
out += COMMAND_SPACE
|
|
out += w
|
|
# Note: Do *not* strip `out`, since that forces the allocation
|
|
# of a contiguous string & thus quadratic complexity.
|
|
out += ENDLINE + "\n"
|
|
|
|
# store the latest command after written
|
|
lastcommand = command
|
|
|
|
return out
|
|
|
|
|
|
# print(__name__ + " gcode postprocessor loaded.")
|