377 lines
13 KiB
Python
377 lines
13 KiB
Python
# ***************************************************************************
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# * Copyright (c) 2014 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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# * This file has been modified from Sliptonic original Linux CNC post *
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# * for use with a Dynapath 20 controller all changes and Modifications *
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# * (c) Linden (Linden@aktfast.net) 2016 *
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# * *
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# * Additional changes 2020 adding arguments to control units, precision *
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# * editor, header, etc. Now uses FreeCAD unit system to correctly *
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# * set Feed rate - sliptonic *
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# * *
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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.Post.Utils as PostUtils
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import PathScripts.PathUtils as PathUtils
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import argparse
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import datetime
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import shlex
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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 Tree Journyman 325 3 axis mill with Dynapath 20
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controller in MM. This is a work in progress and very few of the functions
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available on the Dynapath have been implemented at this time.
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This postprocessor, once placed in the appropriate PathScripts folder,
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can be used directly from inside FreeCAD, via the GUI importer or via python
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scripts with:
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Done
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Coordinate Decimal limited to 3 places
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Feed limited to hole number no decimal
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Speed Limited to hole number no decimal
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Machine Travel Limits Set to approximate values
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Line numbers start at one and incremental by 1
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Set preamble
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Set postamble
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To Do
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Change G20 and G21 to G70 and G71 for metric or imperial units
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Convert arcs to absolute
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Strip comments and white spaces
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Add file name in brackets limited to 8 alpha numeric no spaces all caps as
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first line in file
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Change Q to K For depth of peck on G83
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Fix tool change
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Limit comments length and characters to Uppercase, alpha numeric and
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spaces add / prior to comments
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import dynapath_post
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dynapath_post.export(object,"/path/to/file.ncc","")
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"""
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parser = argparse.ArgumentParser(prog="dynapath_post", 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="G17\nG90\nG80\nG40"',
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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="M09\nM05\nG80\nG40\nG17\nG90\nM30"',
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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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TOOLTIP_ARGS = parser.format_help()
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now = datetime.datetime.now()
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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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COMMAND_SPACE = " "
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LINENR = 1 # line number starting value
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UNIT_SPEED_FORMAT = "mm/min"
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UNIT_FORMAT = "mm"
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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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MACHINE_NAME = "Tree MM"
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CORNER_MIN = {"x": -340, "y": 0, "z": 0}
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CORNER_MAX = {"x": 340, "y": -355, "z": -150}
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# Preamble text will appear at the beginning of the GCODE output file.
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PREAMBLE = """G17
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G90
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;G90.1 ;needed for simulation only
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G80
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G40
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"""
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# Postamble text will appear following the last operation.
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POSTAMBLE = """M09
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M05
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G80
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G40
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G17
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G90
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M30
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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 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 USE_TLO
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global OUTPUT_DOUBLES
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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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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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global UNITS
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global UNIT_FORMAT
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global UNIT_SPEED_FORMAT
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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
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print("postprocessing...")
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gcode = ""
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# Find the machine.
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# The user my have overridden post processor defaults in the GUI. Make sure we're using the current values in the Machine Def.
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myMachine = None
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for pathobj in objectslist:
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if hasattr(pathobj, "MachineName"):
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myMachine = pathobj.MachineName
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if hasattr(pathobj, "MachineUnits"):
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if pathobj.MachineUnits == "Metric":
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UNITS = "G21"
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else:
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UNITS = "G20"
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if myMachine is None:
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print("No machine found in this selection")
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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(True):
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gcode += linenumber() + line
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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: " + obj.Label + ")\n"
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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: " + obj.Label + ")\n"
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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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print("show editor: {}".format(SHOW_EDITOR))
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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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gfile = pyopen(filename, "w")
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gfile.write(final)
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gfile.close()
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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 += 1
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return "N" + str(LINENR) + " "
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return ""
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def parse(pathobj):
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global PRECISION
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global UNIT_FORMAT
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global UNIT_SPEED_FORMAT
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out = ""
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lastcommand = None
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precision_string = "." + str(PRECISION) + "f"
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# params = ['X','Y','Z','A','B','I','J','K','F','S'] #This list control the order of parameters
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params = ["X", "Y", "Z", "A", "B", "I", "J", "F", "S", "T", "Q", "R", "L"]
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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() + "(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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if not hasattr(pathobj, "Path"): # groups might contain non-path things like stock.
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return out
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if OUTPUT_COMMENTS:
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out += linenumber() + "(Path: " + pathobj.Label + ")\n"
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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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outstring.append(command)
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# if modal: only print the command if it is not 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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# 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":
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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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elif param == "S":
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outstring.append(param + format(c.Parameters[param], precision_string))
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elif param == "T":
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outstring.append(param + format(c.Parameters["T"], precision_string))
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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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# Check for Tool Change:
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if command == "M6":
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if OUTPUT_COMMENTS:
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out += linenumber() + "(begin toolchange)\n"
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for line in TOOL_CHANGE.splitlines(True):
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out += linenumber() + line
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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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