3D Metal Printing Slicer Plugin[edit | edit source]

This is a plugin for the slicing software Cura which will create G-Code specific for the MOST delta Open-source metal 3-D printer.
NOTICE: This plugin is only tested to work with Cura v14.x. It is not guaranteed to work on any version of Cura greater than 14.x.

Installation Instructions[edit | edit source]

  • Download the Welder.py file from here.
    • If you cannot obtain the code from GitHub, copy the code from below and save it as Welder.py
#Name: Welder
#Info: Mangle GCode to work on welder (2014-02-10)
#Depend: GCode
#Type: postprocess
#Param: speed(float:10) target extruder speed (mm/s)
#Param: mindist(float:1) minimum travel distance to switch off welder (mm)
#Param: ON(str:G4 P0;M42 P0 S3) Commands to insert after travel
#Param: OFF(str:G4 P0;M42 P0 S0) Commands to insert before travel

import sys

__author__ = 'Bas Wijnen <wijnen@debian.org>'
__date__ = '2014-02-10'
__license__ = 'GNU Affero General Public License http://www.gnu.org/licenses/agpl.html'

	infilename = filename
	outfilename = filename
	ON = ON.strip ().replace (';', '\n') + '\n'
	OFF = OFF.strip ().replace (';', '\n') + '\n'
except NameError:
	#assert len (sys.argv) in (3, 5)
	infilename = sys.stdin
	outfilename = sys.stdout
	speed = float (sys.argv[1]) if len (sys.argv) > 3 else .8
	mindist = float (sys.argv[2]) if len (sys.argv) > 4 else 1.
	ON = 'G4 P0\nM42 P0 S3\n'
	OFF = 'G4 P0\nM42 P0 S0\n'
extruding = False
pos = [0., 0., 0., 0.]
erel = None
rel = False
edata = [0.,0.]

def parse (line):
	edata[0] = pos[3]
	global rel, erel, extruding
	if ';' in line:
		l = line[:line.find (';')]
	elif '//' in line:
		l = line[:line.find ('//')]
		l = line
	components = l.split ()
	if len (components) == 0:
		return line
	if components[0] in ('M109', 'M104', 'M190', 'M140'):
	if components[0] == 'G90':
		rel = False
	if components[0] == 'G91':
		rel = True
	if components[0] == 'M82':
		erel = False
	if components[0] == 'M83':
		erel = True
	if components[0] == 'G92':
		for w in components:
			if w[0] in 'XYZ':
				wh = ord (w[0]) - ord ('X')
				pos[wh] = float (w[1:])
			elif w[0] == 'E':
				pos[3] = float (w[1:])
	if components[0] not in ('G0', 'G1'):
		return line
	parts = {}
	for p in components[1:]:
		if p[0] in parts or p[0] not in 'XYZEF':
			print 'warning: %s' % line
			return line
		parts[p[0]] = float (p[1:])
	x = []
	for i, c in enumerate ('XYZE'):
		if c in parts:
			x.append (parts[c] if (rel if i < 3 or erel is None else erel) else parts[c] - pos[i])
			pos[i] += x[-1]
			x.append (0.)
	dist = sum ([t ** 2 for t in x[:3]]) ** .5
	if 'E' not in parts or x[3] <= 0:
		if extruding and dist > mindist:
			extruding = False
			return OFF + line
		return line
	del parts['E']
	t = x[3] / speed
	parts['F'] = dist / t * 60.
	ret = 'G1 ' + ' '.join (['%s%f' % (c, parts[c]) for c in parts])
	if not extruding:
		extruding = True
		return ON + ret
	edata[1] = pos[3]
	return ret

	if isinstance (infilename, str):
		with open (infilename, "r") as f:
			lines = f.readlines ()
		lines = infilename.readlines ()

	if isinstance (outfilename, str):
		with open (outfilename, "w") as f:
			for line in lines:
				f.write (parse (line.strip ()) + '\n')
		for line in lines:
			outfilename.write (parse (line.strip ()) + '\n')
	print ('something was wrong:', sys.exc_value)
  • Open Cura and make sure the switch to full settings is selected under the expert menu
  • Click on the plugin tab and navigate to the bottom of the screen where there is an "Open plugin location" button
  • Click on the button and it will open up a file browser window, drag and drop the Welder.py into the window, and close the window.
  • Restart Cura and the Welder plugin will be in the plugins box.

Use[edit | edit source]

Figure 1: Overview of Cura with Welder.py plugin active
  • To use the Welder plugin double click on it and a Welder window will appear in the "Enabled Plugins" section of the tab.
  • There are a few different options the plugin as seen in Figure 1.
    • The target extruder speed is the target speed for the bed to move while the welder is turned on.
    • The minimum travel distance to switch off welder is the minimum distance the welder has to travel before the plugin will insert a command to turn it off.
      • Set this value at around ten unless you have a very special print. It is not good to constantly switch the welder on and off because doing so will eventually overheat the welder
    • The commands to insert after/before travel inserts the entered G-code after and before a large block of movement set by the field above.
  • Once you have entered your values in the plugin, slicing is the same as normally using Cura.
  • After you have sliced the G-code, go back and double check the code for any conflicts.

See also[edit | edit source]

Page data
Authors Mike Vennard
Published 2015
License CC-BY-SA-4.0
Impact Number of views to this page and its redirects. Updated once a month. Views by admins and bots are not counted. Multiple views during the same session are counted as one. 861
Issues Automatically detected page issues. Click on them to find out more. They may take some minutes to disappear after you fix them. No lead section, No main image, Lists nested too deep
Cookies help us deliver our services. By using our services, you agree to our use of cookies.