skeinforge_application.skeinforge_plugins.craft_plugins.chamber ($Date: 2008/21/04 $) | index /home/enrique/Desktop/backup/babbleold/script/reprap/fabmetheus/skeinforge_application/skeinforge_plugins/craft_plugins/chamber.py

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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.
The idea is described at:
http://www.makerbot.com/blog/2011/03/17/if-you-cant-stand-the-heat/

#### 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)