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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 *
# * *
# ***************************************************************************/
# ****************************************************************************
# * Modifications by Samuel Mayer (samuel.mayer@posteo.de) *
# * 2021 *
# * *
# * This postprocessor is based on the linuxcnc_post coming with FreeCAD *
# * 0.19 and modified to work with Kinetic-NC (cnc-step.com) and Beamicon2 *
# * (benezan-electronics.de) (up to 4 Axis) *
# * *
# ***************************************************************************/
import FreeCAD
from FreeCAD import Units
import Path
import Path.Base.Util as PathUtil
import Path.Post.Utils as PostUtils
import argparse
import datetime
import shlex
from PathScripts import PathUtils
import PathScripts.PathUtils as PathUtils
from builtins import open as pyopen
TOOLTIP = """
This is a postprocessor file for the Path workbench. It is used to
take a pseudo-G-code fragment outputted by a Path object, and output
real G-code suitable for the KineticNC/Beamicon2 Control Software for up to 4 Axis (3 plus rotary).
The CORNER_MAX Values are set for a mill with max travel of 1000mm in X, 600mm in Y and 300mm in Z direction.
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 KineticNCBeamicon2_post
KineticNCBeamicon2_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=r'set commands to be issued before the first command, default="%%\nG17 G21 G40 G49 G80 G90\nM08\n"',
)
parser.add_argument(
"--postamble",
help=r'set commands to be issued after the last command, default="M05 M09\nG17 G90 G80 G40\nM30\n"',
)
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")
TOOLTIP_ARGS = parser.format_help()
# These globals set common customization preferences
OUTPUT_COMMENTS = True
OUTPUT_HEADER = True
OUTPUT_LINE_NUMBERS = False
SHOW_EDITOR = True
MODAL = False # if true commands are suppressed if the same as previous line.
OUTPUT_DOUBLES = True # if false duplicate axis values are suppressed if the same as previous line.
COMMAND_SPACE = " "
LINENR = 100 # line number starting value
# These globals will be reflected in the Machine configuration of the project
UNITS = "G21" # G21 for metric, G20 for us standard
UNIT_SPEED_FORMAT = "mm/min"
UNIT_FORMAT = "mm"
MACHINE_NAME = "not set"
CORNER_MIN = {"x": 0, "y": 0, "z": 0}
CORNER_MAX = {"x": 1000, "y": 600, "z": 300}
PRECISION = 3
# Preamble text will appear at the beginning of the GCODE output file.
PREAMBLE = """%
G17 G21 G40 G49 G80 G90
"""
# Postamble text will appear following the last operation.
POSTAMBLE = """M05
M09
G17 G90 G80 G40
M30
"""
# 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 = """M05
M09
"""
def processArguments(argstring):
global OUTPUT_HEADER
global OUTPUT_COMMENTS
global OUTPUT_LINE_NUMBERS
global SHOW_EDITOR
global PRECISION
global PREAMBLE
global POSTAMBLE
global UNITS
global UNIT_SPEED_FORMAT
global UNIT_FORMAT
global MODAL
global OUTPUT_DOUBLES
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.replace("\\n", "\n")
if args.postamble is not None:
POSTAMBLE = args.postamble.replace("\\n", "\n")
if args.inches:
UNITS = "G20"
UNIT_SPEED_FORMAT = "in/min"
UNIT_FORMAT = "in"
PRECISION = 4
if args.modal:
MODAL = True
if args.axis_modal:
print("here")
OUTPUT_DOUBLES = False
except:
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():
gcode += linenumber() + line + "\n"
gcode += linenumber() + UNITS + "\n"
for obj in objectslist:
# Skip inactive operations
if not PathUtil.activeForOp(obj):
continue
# fetch machine details
job = PathUtils.findParentJob(obj)
myMachine = "not set"
if hasattr(job, "MachineName"):
myMachine = job.MachineName
if hasattr(job, "MachineUnits"):
if job.MachineUnits == "Metric":
UNITS = "G21"
UNIT_FORMAT = "mm"
UNIT_SPEED_FORMAT = "mm/min"
else:
UNITS = "G20"
UNIT_FORMAT = "in"
UNIT_SPEED_FORMAT = "in/min"
# do the pre_op
if OUTPUT_COMMENTS:
gcode += linenumber() + "(begin operation: %s)\n" % obj.Label
gcode += linenumber() + "(machine: %s, %s)\n" % (
myMachine,
UNIT_SPEED_FORMAT,
)
for line in PRE_OPERATION.splitlines(True):
gcode += linenumber() + line
# get coolant mode
coolantMode = PathUtil.coolantModeForOp(obj)
# 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():
gcode += linenumber() + line + "\n"
if FreeCAD.GuiUp and SHOW_EDITOR:
dia = PostUtils.GCodeEditorDialog()
dia.editor.setPlainText(gcode)
result = dia.exec_()
if result:
final = dia.editor.toPlainText()
else:
final = gcode
else:
final = gcode
print("done postprocessing.")
if not filename == "-":
gfile = pyopen(filename, "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 PathUtils.getPathWithPlacement(pathobj).Commands:
outstring = []
command = c.Name
if pathobj.Label == "Drilling" and command in ["G98", "G99"]:
out += linenumber() + "(" + command + " removed as KineticNC do not support it)\n"
continue
if command in ["G85"]:
out += linenumber() + "(" + command + " removed as KineticNC do not support it)\n"
continue
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.startswith("(") 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)
)
if (
command in ["G0"]
and "Z" not in c.Parameters
and pathobj.Label == "Drilling"
and "R" in currLocation.keys()
):
if not OUTPUT_DOUBLES:
continue
else:
pos = Units.Quantity(currLocation["R"], FreeCAD.Units.Length)
outstring.append(
"Z" + 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":
# if OUTPUT_COMMENTS:
# out += linenumber() + "(begin toolchange)\n"
for line in TOOL_CHANGE.splitlines(True):
out += linenumber() + line
if command == "message":
if OUTPUT_COMMENTS is False:
out = []
else:
outstring.pop(0) # remove the command
# prepend a line number and append a newline
if len(outstring) >= 1:
if OUTPUT_LINE_NUMBERS:
outstring.insert(0, (linenumber()))
# append the line to the final output
for w in outstring:
out += w + COMMAND_SPACE
out = out.strip() + "\n"
return out
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