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Update doc for _fixMaterialDiameterAndNozzleSize()

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Lipu Fei 2018-03-03 15:44:20 +01:00
parent a09bf7faa6
commit 7216641fad
1 changed files with 20 additions and 12 deletions
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32
cura/Settings/ExtruderManager.py
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@ -408,20 +408,28 @@ class ExtruderManager(QObject):
# This function tries to fix the problem with per-extruder-settable nozzle size and material diameter problems
# in early versions (3.0 - 3.2.1).
#
# We cannot add a setting definition of "material_diameter" into the extruder's definition at runtime
# because all other machines which uses "fdmextruder" as the extruder definition will be affected.
# In earlier versions, "nozzle size" and "material diameter" are only applicable to the complete machine, so all
# extruders share the same values. In this case, "nozzle size" and "material diameter" are saved in the
# GlobalStack's DefinitionChanges container.
#
# The problem is that single extrusion machines have their default material diameter defined in the global
# definitions. Now we automatically create an extruder stack for those machines using "fdmextruder"
# definition, which doesn't have the specific "material_diameter" and "machine_nozzle_size" defined for
# each machine. This results in wrong values which can be found in the MachineSettings dialog.
# Later, we could have different "nozzle size" for each extruder, but "material diameter" could only be set for
# the entire machine. In this case, "nozzle size" should be saved in each ExtruderStack's DefinitionChanges, but
# "material diameter" still remains in the GlobalStack's DefinitionChanges.
#
# To solve this, we put "material_diameter" back into the "fdmextruder" definition because modifying it in
# the extruder definition will affect all machines which uses the "fdmextruder" definition. Moreover, now
# we also check the value defined in the machine definition. If present, the value defined in the global
# stack's definition changes container will be copied. Otherwise, we will check if the default values in the
# machine definition and the extruder definition are the same, and if not, the default value in the machine
# definition will be copied to the extruder stack's definition changes.
# Lateer, both "nozzle size" and "material diameter" are settable per-extruder, and both settings should be saved
# in the ExtruderStack's DefinitionChanges.
#
# There were some bugs in upgrade so the data weren't saved correct as described above. This function tries fix
# this.
#
# One more thing is about material diameter and single-extrusion machines. Most single-extrusion machines don't
# specifically define their extruder definition, so they reuse "fdmextruder", but for those machines, they may
# define "material diameter = 1.75" in their machine definition, but in "fdmextruder", it's still "2.85". This
# causes a problem with incorrect default values.
#
# This is also fixed here in this way: If no "material diameter" is specified, it will look for the default value
# in both the Extruder's definition and the Global's definition. If 2 values don't match, we will use the value
# from the Global definition by setting it in the Extruder's DefinitionChanges container.
#
def _fixMaterialDiameterAndNozzleSize(self, global_stack, extruder_stack_list):
keys_to_copy = ["material_diameter", "machine_nozzle_size"] # these will be copied over to all extruders