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Added contributed post-processor scripts.
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@mlampert @wwmayer
mlampert authored and wwmayer committed Nov 2, 2016
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266 changes: 266 additions & 0 deletions src/Mod/Path/PathScripts/dynapath_post.py
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#***************************************************************************
#* (c) sliptonic (shopinthewoods@gmail.com) 2014 *
#* *
#* 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 *
#* *
#* This file has been modified from Sliptonis original Linux CNC post *
#* for use with a Dynapath 20 controller all changes and Modifications *
#* (c) Linden (Linden@aktfast.net) 2016 *
#* *
#***************************************************************************/


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 Tree Journyman 325 3 axis mill with Dynapath 20 controller in MM.
This is a work in progress and very few of the functions available on the Dynapath have been
implemented at this time.
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:
Done
Coordinate Decimal limited to 3 places
Feed limited to hole number no decimal
Speed Limited to hole number no decimal
Machine Travel Limits Set to approximate values
Line numbers start at one and incremental by 1
Set preamble
Set postamble
To Do
Change G20 and G21 to G70 and G71 for metric or imperial units
Convert arcs to absolute
Strip comments and white spaces
Add file name in brackets limited to 8 alpha numeric no spaces all caps as first line in file
Change Q to K For depth of peck on G83
Fix tool change
Limit comments length and characters to Uppercase, alpha numeric and spaces add / prior to coments
import linuxcnc_post
linuxcnc_post.export(object,"/path/to/file.ncc")
'''

import datetime
now = datetime.datetime.now()
from PathScripts import PostUtils

#These globals set common customization preferences
OUTPUT_COMMENTS = True
OUTPUT_HEADER = False
OUTPUT_LINE_NUMBERS = False
SHOW_EDITOR = True
MODAL = False #if true commands are suppressed if the same as previous line.
COMMAND_SPACE = " "
LINENR = 1 #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
MACHINE_NAME = "Tree MM"
CORNER_MIN = {'x':-340, 'y':0, 'z':0 }
CORNER_MAX = {'x':340, 'y':-355, 'z':-150 }

#Preamble text will appear at the beginning of the GCODE output file.
PREAMBLE = '''G17
G90
;G90.1 ;needed for simulation only
G80
G40
'''

#Postamble text will appear following the last operation.
POSTAMBLE = '''M09
M05
G80
G40
G17
G90
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 = ''''''


# to distinguish python built-in open function from the one declared below
if open.__module__ == '__builtin__':
pythonopen = open


def export(objectslist,filename):
global UNITS
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

print "postprocessing..."
gcode = ""

#Find the machine.
#The user my have overriden post processor defaults in the GUI. Make sure we're using the current values in the Machine Def.
myMachine = None
for pathobj in objectslist:
if hasattr(pathobj,"Group"): #We have a compound or project.
for p in pathobj.Group:
if p.Name == "Machine":
myMachine = p
if myMachine is None:
print "No machine found in this project"
else:
if myMachine.MachineUnits == "Metric":
UNITS = "G21"
else:
UNITS = "G20"


# 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(True):
gcode += linenumber() + line
gcode += linenumber() + UNITS + "\n"

for obj in objectslist:

#do the pre_op
if OUTPUT_COMMENTS: gcode += linenumber() + "(begin operation: " + obj.Label + ")\n"
for line in PRE_OPERATION.splitlines(True):
gcode += linenumber() + line

gcode += parse(obj)

#do the post_op
if OUTPUT_COMMENTS: gcode += linenumber() + "(finish operation: " + obj.Label + ")\n"
for line in POST_OPERATION.splitlines(True):
gcode += linenumber() + line

#do the post_amble

if OUTPUT_COMMENTS: gcode += "(begin postamble)\n"
for line in POSTAMBLE.splitlines(True):
gcode += linenumber() + line

if SHOW_EDITOR:
dia = PostUtils.GCodeEditorDialog()
dia.editor.setText(gcode)
result = dia.exec_()
if result:
final = dia.editor.toPlainText()
else:
final = gcode
else:
final = gcode

print "done postprocessing."

gfile = pythonopen(filename,"wb")
gfile.write(gcode)
gfile.close()


def linenumber():
global LINENR
if OUTPUT_LINE_NUMBERS == True:
LINENR += 1
return "N" + str(LINENR) + " "
return ""

def parse(pathobj):
out = ""
lastcommand = None

#params = ['X','Y','Z','A','B','I','J','K','F','S'] #This list control the order of parameters
params = ['X','Y','Z','A','B','I','J','F','S','T','Q','R','L'] #linuxcnc doesn't want K properties on XY plane Arcs need work.

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

if not hasattr(pathobj,"Path"): #groups might contain non-path things like stock.
return out

if OUTPUT_COMMENTS: out += linenumber() + "(Path: " + pathobj.Label + ")\n"

for c in pathobj.Path.Commands:
outstring = []
command = c.Name
outstring.append(command)
# if modal: only print the command if it is not the same as the last one
if MODAL == True:
if command == lastcommand:
outstring.pop(0)


# Now add the remaining parameters in order
for param in params:
if param in c.Parameters:
if param == 'F':
outstring.append(param + format(c.Parameters['F'], '.0f'))
elif param == 'S':
outstring.append(param + format(c.Parameters[param], '.0f'))
elif param == 'T':
outstring.append(param + format(c.Parameters['T'], '.0f'))
else:
outstring.append(param + format(c.Parameters[param], '.3f'))

# store the latest command
lastcommand = command

# 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 == 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

print __name__ + " gcode postprocessor loaded."

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