Here is the code with a --swait argument added so you can put the wait time in the command arguments in the post processor dialoge box.
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# ***************************************************************************
# * Copyright (c) 2014 sliptonic <shopinthewoods@gmail.com> *
# * *
# * This file is part of the FreeCAD CAx development system. *
# * *
# * This program is free software; you can redistribute it and/or modify *
# * it under the terms of the GNU Lesser General Public License (LGPL) *
# * as published by the Free Software Foundation; either version 2 of *
# * the License, or (at your option) any later version. *
# * for detail see the LICENCE text file. *
# * *
# * FreeCAD is distributed in the hope that it will be useful, *
# * but WITHOUT ANY WARRANTY; without even the implied warranty of *
# * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
# * GNU Lesser General Public License for more details. *
# * *
# * You should have received a copy of the GNU Library General Public *
# * License along with FreeCAD; if not, write to the Free Software *
# * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
# * USA *
# * *
# ***************************************************************************
from __future__ import print_function
import FreeCAD
from FreeCAD import Units
import Path
import argparse
import datetime
import shlex
from PathScripts import PostUtils
TOOLTIP = """
This is a postprocessor file for the Path workbench. It is used to
take a pseudo-gcode fragment outputted by a Path object, and output
real GCode suitable for a linuxcnc 3 axis mill. This postprocessor, once placed
in the appropriate PathScripts folder, can be used directly from inside
FreeCAD, via the GUI importer or via python scripts with:
import linuxcnc_post
linuxcnc_post.export(object,"/path/to/file.ncc","")
"""
now = datetime.datetime.now()
parser = argparse.ArgumentParser(prog="linuxcnc", add_help=False)
parser.add_argument("--no-header", action="store_true", help="suppress header output")
parser.add_argument(
"--no-comments", action="store_true", help="suppress comment output"
)
parser.add_argument(
"--line-numbers", action="store_true", help="prefix with line numbers"
)
parser.add_argument(
"--no-show-editor",
action="store_true",
help="don't pop up editor before writing output",
)
parser.add_argument(
"--precision", default="3", help="number of digits of precision, default=3"
)
parser.add_argument(
"--preamble",
help='set commands to be issued before the first command, default="G17\nG90"',
)
parser.add_argument(
"--postamble",
help='set commands to be issued after the last command, default="M05\nG17 G90\nM2"',
)
parser.add_argument(
"--inches", action="store_true", help="Convert output for US imperial mode (G20)"
)
parser.add_argument(
"--modal",
action="store_true",
help="Output the Same G-command Name USE NonModal Mode",
)
parser.add_argument(
"--axis-modal", action="store_true", help="Output the Same Axis Value Mode"
)
parser.add_argument(
"--no-tlo",
action="store_true",
help="suppress tool length offset (G43) following tool changes",
)
parser.add_argument(
"--swait", default="0", help="wait time for spindle spool-up, default=0"
)
TOOLTIP_ARGS = parser.format_help()
# These globals set common customization preferences
OUTPUT_COMMENTS = True
OUTPUT_HEADER = True
OUTPUT_LINE_NUMBERS = False
SHOW_EDITOR = True
MODAL = False # if true commands are suppressed if the same as previous line.
USE_TLO = True # if true G43 will be output following tool changes
OUTPUT_DOUBLES = (
True # if false duplicate axis values are suppressed if the same as previous line.
)
COMMAND_SPACE = " "
LINENR = 100 # line number starting value
# These globals will be reflected in the Machine configuration of the project
UNITS = "G21" # G21 for metric, G20 for us standard
UNIT_SPEED_FORMAT = "mm/min"
UNIT_FORMAT = "mm"
MACHINE_NAME = "LinuxCNC"
CORNER_MIN = {"x": 0, "y": 0, "z": 0}
CORNER_MAX = {"x": 500, "y": 300, "z": 300}
PRECISION = 3
TOOL_SPOOL_WAIT_TIME = 0
# Preamble text will appear at the beginning of the GCODE output file.
PREAMBLE = """G17 G54 G40 G49 G80 G90
"""
# Postamble text will appear following the last operation.
POSTAMBLE = """M05
G17 G54 G90 G80 G40
M2
"""
# Pre operation text will be inserted before every operation
PRE_OPERATION = """"""
# Post operation text will be inserted after every operation
POST_OPERATION = """"""
# Tool Change commands will be inserted before a tool change
TOOL_CHANGE = """"""
# Spend speed change commands will have wait time added
SPINDLE_SPEED = """"""
# to distinguish python built-in open function from the one declared below
if open.__module__ in ["__builtin__", "io"]:
pythonopen = open
def processArguments(argstring):
global OUTPUT_HEADER
global OUTPUT_COMMENTS
global OUTPUT_LINE_NUMBERS
global SHOW_EDITOR
global PRECISION
global PREAMBLE
global POSTAMBLE
global UNITS
global UNIT_SPEED_FORMAT
global UNIT_FORMAT
global MODAL
global USE_TLO
global OUTPUT_DOUBLES
global TOOL_SPOOL_WAIT_TIME
try:
args = parser.parse_args(shlex.split(argstring))
if args.no_header:
OUTPUT_HEADER = False
if args.no_comments:
OUTPUT_COMMENTS = False
if args.line_numbers:
OUTPUT_LINE_NUMBERS = True
if args.no_show_editor:
SHOW_EDITOR = False
print("Show editor = %d" % SHOW_EDITOR)
PRECISION = args.precision
if args.preamble is not None:
PREAMBLE = args.preamble
if args.postamble is not None:
POSTAMBLE = args.postamble
if args.inches:
UNITS = "G20"
UNIT_SPEED_FORMAT = "in/min"
UNIT_FORMAT = "in"
PRECISION = 4
if args.modal:
MODAL = True
if args.no_tlo:
USE_TLO = False
if args.axis_modal:
print("here")
OUTPUT_DOUBLES = False
TOOL_SPOOL_WAIT_TIME = args.swait
except Exception:
return False
return True
def export(objectslist, filename, argstring):
if not processArguments(argstring):
return None
global UNITS
global UNIT_FORMAT
global UNIT_SPEED_FORMAT
for obj in objectslist:
if not hasattr(obj, "Path"):
print(
"the object "
+ obj.Name
+ " is not a path. Please select only path and Compounds."
)
return None
print("postprocessing...")
gcode = ""
# write header
if OUTPUT_HEADER:
gcode += linenumber() + "(Exported by FreeCAD)\n"
gcode += linenumber() + "(Post Processor: " + __name__ + ")\n"
gcode += linenumber() + "(Output Time:" + str(now) + ")\n"
# Write the preamble
if OUTPUT_COMMENTS:
gcode += linenumber() + "(begin preamble)\n"
for line in PREAMBLE.splitlines(False):
gcode += linenumber() + line + "\n"
gcode += linenumber() + UNITS + "\n"
for obj in objectslist:
# Skip inactive operations
if hasattr(obj, "Active"):
if not obj.Active:
continue
if hasattr(obj, "Base") and hasattr(obj.Base, "Active"):
if not obj.Base.Active:
continue
# do the pre_op
if OUTPUT_COMMENTS:
gcode += linenumber() + "(begin operation: %s)\n" % obj.Label
gcode += linenumber() + "(machine units: %s)\n" % (UNIT_SPEED_FORMAT)
for line in PRE_OPERATION.splitlines(True):
gcode += linenumber() + line
# get coolant mode
coolantMode = "None"
if (
hasattr(obj, "CoolantMode")
or hasattr(obj, "Base")
and hasattr(obj.Base, "CoolantMode")
):
if hasattr(obj, "CoolantMode"):
coolantMode = obj.CoolantMode
else:
coolantMode = obj.Base.CoolantMode
# turn coolant on if required
if OUTPUT_COMMENTS:
if not coolantMode == "None":
gcode += linenumber() + "(Coolant On:" + coolantMode + ")\n"
if coolantMode == "Flood":
gcode += linenumber() + "M8" + "\n"
if coolantMode == "Mist":
gcode += linenumber() + "M7" + "\n"
# process the operation gcode
gcode += parse(obj)
# do the post_op
if OUTPUT_COMMENTS:
gcode += linenumber() + "(finish operation: %s)\n" % obj.Label
for line in POST_OPERATION.splitlines(True):
gcode += linenumber() + line
# turn coolant off if required
if not coolantMode == "None":
if OUTPUT_COMMENTS:
gcode += linenumber() + "(Coolant Off:" + coolantMode + ")\n"
gcode += linenumber() + "M9" + "\n"
# do the post_amble
if OUTPUT_COMMENTS:
gcode += "(begin postamble)\n"
for line in POSTAMBLE.splitlines(True):
gcode += linenumber() + line
if FreeCAD.GuiUp and SHOW_EDITOR:
final = gcode
if len(gcode) > 100000:
print("Skipping editor since output is greater than 100kb")
else:
dia = PostUtils.GCodeEditorDialog()
dia.editor.setText(gcode)
result = dia.exec_()
if result:
final = dia.editor.toPlainText()
else:
final = gcode
print("done postprocessing.")
if not filename == "-":
gfile = pythonopen(filename, "w")
gfile.write(final)
gfile.close()
return final
def linenumber():
global LINENR
if OUTPUT_LINE_NUMBERS is True:
LINENR += 10
return "N" + str(LINENR) + " "
return ""
def parse(pathobj):
global PRECISION
global MODAL
global OUTPUT_DOUBLES
global UNIT_FORMAT
global UNIT_SPEED_FORMAT
out = ""
lastcommand = None
precision_string = "." + str(PRECISION) + "f"
currLocation = {} # keep track for no doubles
# the order of parameters
# linuxcnc doesn't want K properties on XY plane Arcs need work.
params = [
"X",
"Y",
"Z",
"A",
"B",
"C",
"I",
"J",
"F",
"S",
"T",
"Q",
"R",
"L",
"H",
"D",
"P",
]
firstmove = Path.Command("G0", {"X": -1, "Y": -1, "Z": -1, "F": 0.0})
currLocation.update(firstmove.Parameters) # set First location Parameters
if hasattr(pathobj, "Group"): # We have a compound or project.
# if OUTPUT_COMMENTS:
# out += linenumber() + "(compound: " + pathobj.Label + ")\n"
for p in pathobj.Group:
out += parse(p)
return out
else: # parsing simple path
# groups might contain non-path things like stock.
if not hasattr(pathobj, "Path"):
return out
# if OUTPUT_COMMENTS:
# out += linenumber() + "(" + pathobj.Label + ")\n"
for c in pathobj.Path.Commands:
outstring = []
command = c.Name
outstring.append(command)
# if modal: suppress the command if it is the same as the last one
if MODAL is True:
if command == lastcommand:
outstring.pop(0)
if c.Name[0] == "(" and not OUTPUT_COMMENTS: # command is a comment
continue
# Now add the remaining parameters in order
for param in params:
if param in c.Parameters:
if param == "F" and (
currLocation[param] != c.Parameters[param] or OUTPUT_DOUBLES
):
if c.Name not in [
"G0",
"G00",
]: # linuxcnc doesn't use rapid speeds
speed = Units.Quantity(
c.Parameters["F"], FreeCAD.Units.Velocity
)
if speed.getValueAs(UNIT_SPEED_FORMAT) > 0.0:
outstring.append(
param
+ format(
float(speed.getValueAs(UNIT_SPEED_FORMAT)),
precision_string,
)
)
else:
continue
elif param == "T":
outstring.append(param + str(int(c.Parameters["T"])))
elif param == "H":
outstring.append(param + str(int(c.Parameters["H"])))
elif param == "D":
outstring.append(param + str(int(c.Parameters["D"])))
elif param == "S":
outstring.append(param + str(int(c.Parameters["S"])))
else:
if (
(not OUTPUT_DOUBLES)
and (param in currLocation)
and (currLocation[param] == c.Parameters[param])
):
continue
else:
pos = Units.Quantity(
c.Parameters[param], FreeCAD.Units.Length
)
outstring.append(
param
+ format(
float(pos.getValueAs(UNIT_FORMAT)), precision_string
)
)
# store the latest command
lastcommand = command
currLocation.update(c.Parameters)
# Check for Tool Change:
if command == "M6":
# 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)
# Check for Spindle Speed:
if command == "M3" or command == "M4" and TOOL_SPOOL_WAIT_TIME > 0:
outstring.append("\nG4 P" + str(TOOL_SPOOL_WAIT_TIME))
if command == "message":
if OUTPUT_COMMENTS is False:
out = []
else:
outstring.pop(0) # remove the command
# prepend a line number and append a newline
if len(outstring) >= 1:
if OUTPUT_LINE_NUMBERS:
outstring.insert(0, (linenumber()))
# append the line to the final output
for w in outstring:
out += w + COMMAND_SPACE
# Note: Do *not* strip `out`, since that forces the allocation
# of a contiguous string & thus quadratic complexity.
out += "\n"
return out
# print(__name__ + " gcode postprocessor loaded.")