Fix the negative object sink crash.

diff --git a/Cura/util/profile.py b/Cura/util/profile.py
index 141737ce28091370c6ce1c968d84813c27d36c82..8ad8b15452ecae2f87d2d4ae00bb2e479508973e 100644 (file)
--- a/Cura/util/profile.py
+++ b/Cura/util/profile.py
@@ -196,7 +196,7 @@ setting('retraction_combing',       True, bool,  'expert',   _('Retraction')).se
 setting('retraction_minimal_extrusion',0.02, float,'expert', _('Retraction')).setRange(0).setLabel(_("Minimal extrusion before retracting (mm)"), _("The minimal amount of extrusion that needs to be done before retracting again if a retraction needs to happen before this minimal is reached the retraction is ignored.\nThis avoids retraction a lot on the same piece of filament which flattens the filament and causes grinding issues."))
 setting('retraction_hop',            0.0, float, 'expert',   _('Retraction')).setRange(0).setLabel(_("Z hop when retracting (mm)"), _("When a retraction is done, the head is lifted by this amount to travel over the print. A value of 0.075 works good. This feature has a lot of positive effect on delta towers."))
 setting('bottom_thickness',          0.3, float, 'advanced', _('Quality')).setRange(0).setLabel(_("Initial layer thickness (mm)"), _("Layer thickness of the bottom layer. A thicker bottom layer makes sticking to the bed easier. Set to 0.0 to have the bottom layer thickness the same as the other layers."))
-setting('object_sink',               0.0, float, 'advanced', _('Quality')).setLabel(_("Cut off object bottom (mm)"), _("Sinks the object into the platform, this can be used for objects that do not have a flat bottom and thus create a too small first layer."))
+setting('object_sink',               0.0, float, 'advanced', _('Quality')).setRange(0).setLabel(_("Cut off object bottom (mm)"), _("Sinks the object into the platform, this can be used for objects that do not have a flat bottom and thus create a too small first layer."))
 #setting('enable_skin',             False, bool,  'advanced', _('Quality')).setLabel(_("Duplicate outlines"), _("Skin prints the outer lines of the prints twice, each time with half the thickness. This gives the illusion of a higher print quality."))
 setting('overlap_dual',             0.15, float, 'advanced', _('Quality')).setLabel(_("Dual extrusion overlap (mm)"), _("Add a certain amount of overlapping extrusion on dual-extrusion prints. This bonds the different colors better together."))
 setting('travel_speed',            150.0, float, 'advanced', _('Speed')).setRange(0.1).setLabel(_("Travel speed (mm/s)"), _("Speed at which travel moves are done, a high quality build Ultimaker can reach speeds of 250mm/s. But some machines might miss steps then."))

diff --git a/Cura/util/sliceEngine.py b/Cura/util/sliceEngine.py
index 924662854335fd07ae9afede445a7d9d6dc356fd..eafeecb55412d9c324630e7f072914536ca15c47 100644 (file)
--- a/Cura/util/sliceEngine.py
+++ b/Cura/util/sliceEngine.py
@@ -452,7 +452,7 @@ class Engine(object):
                        'minimalExtrusionBeforeRetraction': int(profile.getProfileSettingFloat('retraction_minimal_extrusion') * 1000),
                        'enableCombing': 1 if profile.getProfileSetting('retraction_combing') == 'True' else 0,
                        'multiVolumeOverlap': int(profile.getProfileSettingFloat('overlap_dual') * 1000),
-                       'objectSink': int(profile.getProfileSettingFloat('object_sink') * 1000),
+                       'objectSink': max(0, int(profile.getProfileSettingFloat('object_sink') * 1000)),
                        'minimalLayerTime': int(profile.getProfileSettingFloat('cool_min_layer_time')),
                        'minimalFeedrate': int(profile.getProfileSettingFloat('cool_min_feedrate')),
                        'coolHeadLift': 1 if profile.getProfileSetting('cool_head_lift') == 'True' else 0,