60c055e62d
This PR fixes header uniformity across all Path files. It also removes all trailing whitespace.
211 lines
8.0 KiB
Python
211 lines
8.0 KiB
Python
# -*- coding: utf-8 -*-
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# ***************************************************************************
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# * Copyright (c) 2014 sliptonic <shopinthewoods<at>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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# ***************************************************************************
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'''
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This is a preprocessor file for the Path workbench. Its aim is to
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parse the contents of a given OpenSBP file, and transform it to make it
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suitable for use in a Path object. This preprocessor, once placed in the
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appropriate PathScripts folder, can be used directly from inside FreeCAD,
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via the GUI importer or via python scripts with:
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import opensbp_pre
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opensbp_pre.insert("/path/to/myfile.ngc","DocumentName")
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DONE
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Correctly imports single axis and multi axis moves.
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Stores Jog and Feed speeds
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Appends Multiaxis Feed speed to G1 moves
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Jog rates don't append to G0 moves
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Make single axis feed rates work
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Imports CG (non-diameter) arcs.
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Handles CW and CCW spindle speeds
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if operations are preceded by a comment ('New Path ...) They are split into multiple paths
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TODO
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Many other OpenSBP commands not handled
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'''
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from __future__ import print_function
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import FreeCAD
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import PathScripts.PathUtil as PathUtil
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import os
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import Path
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AXIS = 'X', 'Y', 'Z', 'A', 'B' # OpenSBP always puts multiaxis move parameters in this order
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SPEEDS = 'XY', 'Z', 'A', 'B'
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# to distinguish python built-in open function from the one declared below
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if open.__module__ in ['__builtin__', 'io']:
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pythonopen = open
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def open(filename):
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"called when freecad opens a file."
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docname = os.path.splitext(os.path.basename(filename))[0]
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doc = FreeCAD.newDocument(docname)
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insert(filename, doc.Name)
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def insert(filename, docname):
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'''called when freecad imports a file
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This insert expects parse to return a list of strings
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each string will become a separate path'''
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gfile = pythonopen(filename)
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gcode = gfile.read()
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gfile.close()
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gcode = parse(gcode)
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doc = FreeCAD.getDocument(docname)
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for subpath in gcode:
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obj = doc.addObject("Path::Feature", "Path")
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path = Path.Path(subpath)
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obj.Path = path
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def parse(inputstring):
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"parse(inputstring): returns a list of parsed output string"
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print("preprocessing...")
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# split the input by line
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lines = inputstring.split("\n")
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return_output = []
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output = ""
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last = {'X': None, 'Y': None, 'Z': None, 'A': None, 'B': None}
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lastrapidspeed = {'XY': "50", 'Z': "50", 'A': "50", 'B': "50"} # set default rapid speeds
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lastfeedspeed = {'XY': "50", 'Z': "50", 'A': "50", 'B': "50"} # set default feed speed
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movecommand = ['G1', 'G0', 'G02', 'G03']
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for line in lines:
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# remove any leftover trailing and preceding spaces
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line = line.strip()
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if not line:
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# discard empty lines
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continue
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if line[0] in ["'", "&"]:
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# discard comment and other non strictly gcode lines
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if line[0:9] == "'New Path":
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# starting new path
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if any(x in output for x in movecommand): # make sure the path has at least one move command.
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return_output.append(output)
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output = ""
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continue
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words = [a.strip() for a in line.split(",")]
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words[0] = words[0].upper()
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if words[0] in ["J2", "J3", "J4", "J5", "M2", "M3", "M4", "M5"]: # multi-axis jogs and moves
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if words[0][0] == 'J': # jog move
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s = "G0 "
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else: # feed move
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s = "G1 "
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speed = lastfeedspeed["XY"]
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for i in range(1, len(words)):
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if words[i] == '':
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if last[AXIS[i - 1]] is None:
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continue
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else:
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s += AXIS[i - 1] + last[AXIS[i - 1]]
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else:
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s += AXIS[i - 1] + words[i]
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last[AXIS[i - 1]] = words[i]
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output += s + " F" + speed + '\n'
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if words[0] in ["JA", "JB", "JX", "JY", "JZ", "MA", "MB", "MX", "MY", "MZ"]: # single axis jogs and moves
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if words[0][0] == 'J': # jog move
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s = "G0 "
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if words[0][1] in ['X', 'Y']:
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speed = lastrapidspeed["XY"]
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else:
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speed = lastrapidspeed[words[0][1]]
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else: # feed move
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s = "G1 "
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if words[0][1] in ['X', 'Y']:
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speed = lastfeedspeed["XY"]
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else:
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speed = lastfeedspeed[words[0][1]]
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last[words[0][1]] = words[1]
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output += s
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for key, val in PathUtil.keyValueIter(last):
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if val is not None:
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output += key + str(val) + " F" + speed + "\n"
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if words[0] in ["JS"]: # set jog speed
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for i in range(1, len(words)):
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if words[i] == '':
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continue
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else:
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lastrapidspeed[SPEEDS[i - 1]] = words[i]
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if words[0] in ["MD"]: # move distance with distance and angle.
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# unsupported at this time
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continue
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if words[0] in ["MH"]: # move home
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# unsupported at this time
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continue
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if words[0] in ["MS"]: # set move speed
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for i in range(1, len(words)):
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if words[i] == '':
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continue
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else:
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lastfeedspeed[SPEEDS[i - 1]] = words[i]
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if words[0] in ["MO"]: # motors off
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# unsupported at this time
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continue
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if words[0] in ["TR"]: # Setting spindle speed
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if float(words[1]) < 0:
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s = "M4 S"
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else:
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s = "M3 S"
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s += str(abs(float(words[1])))
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output += s + '\n'
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if words[0] in ["CG"]: # Gcode circle/arc
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if words[1] != "": # diameter mode
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print("diameter mode not supported")
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continue
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else:
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if words[7] == "1": # CW
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s = "G2"
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else: # CCW
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s = "G3"
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s += " X" + words[2] + " Y" + words[3] + " I" + words[4] + " J" + words[5] + " F" + str(lastfeedspeed["XY"])
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output += s + '\n'
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last["X"] = words[2]
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last["Y"] = words[3]
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# Make sure all appended paths have at least one move command.
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if any(x in output for x in movecommand):
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return_output.append(output)
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print("done preprocessing.")
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return return_output
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print(__name__ + " gcode preprocessor loaded.")
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