Gcode cleaner to work around prusa slic3r annoyances for multi-tool printing on non-Prusa printers.

cleanup_prusa_slic3r_gcode.py

#!/usr/bin/env python
"""
Gcode cleaner to work around prusa slic3r annoyances for multi-filament
single-tool printing on non-Prusa printers.

This gist can be found here:
* https://gist.github.com/ex-nerd/22d0a9796f4f5df7080f9ac5a07a381f

Bugs this attempts to work around:
* https://github.com/prusa3d/Slic3r/issues/557
* https://github.com/prusa3d/Slic3r/issues/559
* https://github.com/prusa3d/Slic3r/issues/560
"""

import os
import re
import argparse


def comment(str):
    return '; ' + str

def rewrite(infile, outfile, verbose=False):
    WIPE = 1
    UNLOAD = 2
    LOAD = 3
    toolchange = 0
    priming = False
    temp_change = None
    for line in infile:
        # Priming
        if line.startswith('; CP PRIMING'):
            if 'START' in line:
                priming = True
            elif 'STOP' in line:
                priming = False
        # Detect toolchange state
        elif line.startswith('; CP TOOLCHANGE'):
            if 'WIPE' in line:
                toolchange = WIPE
            elif 'UNLOAD' in line:
                toolchange = UNLOAD
            elif 'LOAD' in line:
                toolchange = LOAD
            else:
                toolchange = 0

        # Process the various lines
        if line.startswith(';'):
            outfile.write(line)
        elif line.rstrip() in ('G4 S0', ):
            outfile.write(comment(line))
        elif line.startswith('M907 '):
            outfile.write(comment(line))
        elif priming:
            outfile.write(comment(line))
        elif toolchange in (LOAD, UNLOAD):
            if line.startswith('G1'):
                # Only remove integer-value E moves (part of the Prusa load/unload routine?)
                # The other E values appear to be part of the actual wipe tower.
                if re.search(r'E-?\d+\.0000', line):
                    outfile.write(comment(line))
                else:
                    outfile.write(line)
            elif line.startswith('T'):
                outfile.write(line)
                if temp_change:
                    # Duplicate the last temperature change.
                    # https://github.com/prusa3d/Slic3r/issues/559
                    outfile.write(temp_change)
                    temp_change = None
            else:
                if line.startswith('M104 S'):
                    temp_change = line
                outfile.write(line)
        else:
            outfile.write(line)


def parse_args():
    parser = argparse.ArgumentParser(
        description='Gcode cleaner to work around some multi-extruder bugs in slic3r Prusa edition.'
    )
    parser.set_defaults(
        verbose=False,
        overwrite=False,
    )
    parser.add_argument(
        '--verbose', '-v',
        action='store_true',
        help="Enable additional debug output",
    )
    parser.add_argument(
        '--overwrite',
        action='store_true',
        help="Overwrite the input file",
    )
    parser.add_argument(
        'filename',
        type=argparse.FileType('r'),
        nargs='+',
        help="One or more paths to .gcode files to clean",
    )
    return parser.parse_args()


if __name__ == '__main__':
    args = parse_args()

    for infile in args.filename:
        infilename = infile.name
        tmpfilename = '{}.tmp{}'.format(*os.path.splitext(infilename))
        with open(tmpfilename, 'w') as tmpfile:
            rewrite(infile, tmpfile, args.verbose)
        if args.overwrite:
            outfilename = infilename
        else:
            outfilename = '{}.prusaclean{}'.format(*os.path.splitext(infilename))
        os.rename(tmpfilename, outfilename)
        print("{}\n  => {}".format(infilename, outfilename))
        infile.close()

Hi,

I can run this script with any gcode file and it seems to do what you intended (I can clearly see a lot of lines commented out afterwards), but whenever I try to print this, my printer just restarts as soon as the heating is done.
Are there any caveats to use this script properly?

Kind regards.

Erik

Hey could you tell me how to call it in windows 10 ?
I tried

C:\Python277\python.exe c:\Multicolor\cleanup.py;

but i always get Error Code 1.

Sorry, I don't really know anything about using Windows.