skeinforge_application.skeinforge_plugins.craft_plugins.chamber ($Date: 2008/21/04 $)
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Some filaments contract too much and warp the extruded object. To prevent this you have to print the object in a temperature regulated chamber and/or on a temperature regulated bed. The chamber tool allows you to control the bed and chamber temperature and the holding pressure.

The chamber gcodes are also described at:

http://reprap.org/wiki/Mendel_User_Manual:_RepRapGCodes

The chamber manual page is at:

http://fabmetheus.crsndoo.com/wiki/index.php/Skeinforge_Chamber


Operation
Settings
  Bed
    Bed Temperature
    Bed Temperature Begin Change Height
    Bed Temperature End Change Height
    Bed Temperature End
  Chamber Temperature
  Holding Force
Heated Beds
  Bothacker
  Domingo
  Jmil
  Metalab
  Nophead
  Prusajr
  Zaggo
Examples

Operation


The default 'Activate Chamber' checkbox is on. When it is on, the functions described below will work, when it is off, nothing will be done.

Settings


Bed

The initial bed temperature is defined by 'Bed Temperature'. If the 'Bed Temperature End Change Height' is greater or equal to the 'Bed Temperature Begin Change Height' and the 'Bed Temperature Begin Change Height' is greater or equal to zero, then the temperature will be ramped toward the 'Bed Temperature End'. The ramp will start once the extruder reaches the 'Bed Temperature Begin Change Height', then the bed temperature will approach the 'Bed Temperature End' as the extruder reaches the 'Bed Temperature End Change Height', finally the bed temperature will stay at the 'Bed Temperature End' for the remainder of the build.

Bed Temperature

Default: 60C

Defines the initial print bed temperature in Celcius by adding an M140 command.

Bed Temperature Begin Change Height

Default: -1 mm

Defines the height of the beginning of the temperature ramp. If the 'Bed Temperature End Change Height' is less than zero, the bed temperature will remain at the initial 'Bed Temperature'.

Bed Temperature End Change Height

Default: -1 mm

Defines the height of the end of the temperature ramp. If the 'Bed Temperature End Change Height' is less than zero or less than the 'Bed Temperature Begin Change Height', the bed temperature will remain at the initial 'Bed Temperature'.

Bed Temperature End

Default: 20C

Defines the end bed temperature if there is a temperature ramp.

Chamber Temperature

Default: 30C

Defines the chamber temperature in Celcius by adding an M141 command.

Holding Force

Default: 0

Defines the holding pressure of a mechanism, like a vacuum table or electromagnet, to hold the bed surface or object, by adding an M142 command. The holding pressure is in bars. For hardware which only has on/off holding, when the holding pressure is zero, turn off holding, when the holding pressure is greater than zero, turn on holding.

Heated Beds


Bothacker

A resistor heated aluminum plate by Bothacker:

http://bothacker.com

with an article at:

http://bothacker.com/2009/12/18/heated-build-platform/

Domingo

A heated copper build plate by Domingo:

http://casainho-emcrepstrap.blogspot.com/

with articles at:

http://casainho-emcrepstrap.blogspot.com/2010/01/first-time-with-pla-testing-it-also-on.html

http://casainho-emcrepstrap.blogspot.com/2010/01/call-for-helpideas-to-develop-heated.html

http://casainho-emcrepstrap.blogspot.com/2010/01/new-heated-build-platform.html

http://casainho-emcrepstrap.blogspot.com/2010/01/no-acrylic-and-instead-kapton-tape-on.html

http://casainho-emcrepstrap.blogspot.com/2010/01/problems-with-heated-build-platform-and.html

http://casainho-emcrepstrap.blogspot.com/2010/01/perfect-build-platform.html

http://casainho-emcrepstrap.blogspot.com/2009/12/almost-no-warp.html

http://casainho-emcrepstrap.blogspot.com/2009/12/heated-base-plate.html

Jmil

A heated build stage by jmil, over at:

http://www.hive76.org

with articles at:

http://www.hive76.org/handling-hot-build-surfaces

http://www.hive76.org/heated-build-stage-success

Metalab

A heated base by the Metalab folks:

http://reprap.soup.io

with information at:

http://reprap.soup.io/?search=heated%20base

Nophead

A resistor heated aluminum bed by Nophead:

http://hydraraptor.blogspot.com

with articles at:

http://hydraraptor.blogspot.com/2010/01/will-it-stick.html

http://hydraraptor.blogspot.com/2010/01/hot-metal-and-serendipity.html

http://hydraraptor.blogspot.com/2010/01/new-year-new-plastic.html

http://hydraraptor.blogspot.com/2010/01/hot-bed.html

Prusajr

A resistive wire heated plexiglass plate by prusajr:

http://prusadjs.cz/

with articles at:

http://prusadjs.cz/2010/01/heated-reprap-print-bed-mk2/

http://prusadjs.cz/2009/11/look-ma-no-warping-heated-reprap-print-bed/

Zaggo

A resistor heated aluminum plate by Zaggo at Pleasant Software:

http://pleasantsoftware.com/developer/3d/

with articles at:

http://pleasantsoftware.com/developer/3d/2009/12/05/raftless/

http://pleasantsoftware.com/developer/3d/2009/11/15/living-in-times-of-warp-free-printing/

http://pleasantsoftware.com/developer/3d/2009/11/12/canned-heat/

Examples


The following examples chamber the file Screw Holder Bottom.stl. The examples are run in a terminal in the folder which contains Screw Holder Bottom.stl and chamber.py.

> python chamber.py
This brings up the chamber dialog.

> python chamber.py Screw Holder Bottom.stl
The chamber tool is parsing the file:
Screw Holder Bottom.stl
..
The chamber tool has created the file:
Screw Holder Bottom_chamber.gcode


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Modules
       
__init__
fabmetheus_utilities.archive
fabmetheus_utilities.euclidean
fabmetheus_utilities.fabmetheus_tools.fabmetheus_interpret
fabmetheus_utilities.gcodec
fabmetheus_utilities.settings
skeinforge_application.skeinforge_utilities.skeinforge_craft
skeinforge_application.skeinforge_utilities.skeinforge_polyfile
skeinforge_application.skeinforge_utilities.skeinforge_profile
sys

 
Classes
       
ChamberRepository
ChamberSkein

 
class ChamberRepository
    A class to handle the chamber settings.
 
  Methods defined here:
__init__(self)
Set the default settings, execute title & settings fileName.
execute(self)
Chamber button has been clicked.

 
class ChamberSkein
    A class to chamber a skein of extrusions.
 
  Methods defined here:
__init__(self)
Initialize.
addBedTemperature(self, bedTemperature)
Add bed temperature if it is different from the old.
getCraftedGcode(self, gcodeText, repository)
Parse gcode text and store the chamber gcode.
parseInitialization(self)
Parse gcode initialization and store the parameters.
parseLine(self, line)
Parse a gcode line and add it to the chamber skein.

 
Functions
       
getCraftedText(fileName, text='', repository=None)
Chamber the file or text.
getCraftedTextFromText(gcodeText, repository=None)
Chamber a gcode linear move text.
getNewRepository()
Get new repository.
main()
Display the chamber dialog.
writeOutput(fileName, shouldAnalyze=True)
Chamber a gcode linear move file.

 
Data
        __author__ = 'Enrique Perez (perez_enrique@yahoo.com)'
__date__ = '$Date: 2008/21/04 $'
__license__ = 'GNU Affero General Public License http://www.gnu.org/licenses/agpl.html'
absolute_import = _Feature((2, 5, 0, 'alpha', 1), (2, 7, 0, 'alpha', 0), 16384)

 
Author
        Enrique Perez (perez_enrique@yahoo.com)