Cura 13.11 - shell-thickness = nozzle-diam.

[jumpmobile 0]

Hi

I have discovered a problem in Cura 13.11:

When the nozzle diameter equals the shell thickness the slicer does strange things like leaving out walls on the 0.4mm test cube ( http://www.thingiverse.com/thing:52946 ) or making no walls at all...

Workaround: set the shell thickness to 3.99 instead of 0.4.

 

[Daid 306]

Cura cannot slice the 0.4mm thin wall properly, that's a known problem. It's due to rounding in the engine.

 

[christian-zuercher 0]

Is Shell thickness Problem solved!? I dont believe...

Try printing an Object with Shell thicknes of 2mm in Cura 3.10 and compare it with 3.11. It's not working correctly...

 

[Daid 306]

Is Shell thickness Problem solved!? I dont believe...

Try printing an Object with Shell thicknes of 2mm in Cura 3.10 and compare it with 3.11. It's not working correctly...

 

Looks the same to me. Are you using the same nozzle diameter on both?

 

[christian-zuercher 0]

Hi Daid

The Settings are both the same... I tried several Settings and none gave me the desired Result. Cura 3.11 does not respect the Setting "Shell thickness" like Cura 3.10(RC1) does. I'm currently only using Cura 3.10 because of these Problems.

 

[christian-zuercher 0]

I forgott... I always use a multiple of the Nozzle Diameter for the Shell... (so it's 2.4mm, not 2.5mm)

If this is really a Problem... why not "autoadjust" the Value to the next lower valid Value, which is a multiple of the Nozzle Diameter?? There ale already Values that give YOu Feed Back when a Value is not correct/valid...

 

[gr5 2,229]

If you guys are going to report a bug Daid is more likely to look into it if you provide a screen shot of the layer view that demonstrates the problem along with explaining what you set nozzle size and shell to. If you make a little extra effort, then maybe Daid will also.

 

[Daid 306]

If you guys are going to report a bug Daid is more likely to look into it if you provide a screen shot of the layer view that demonstrates the problem along with explaining what you set nozzle size and shell to. If you make a little extra effort, then maybe Daid will also.

 

This.

You're putting a lot of guess work for me here. You just went from 2.0 mm to 2.4 or 2.5, your problem description is vague ("not working correctly" without telling what "correctly" is in your view)

You're also acting like it's a well known problem, while it's the first I heard about it.

 

[jumpmobile 0]

Sorry. I wasn't following this thread.

Here is a screenshot of Cura slicing the 0.4mm calibration box from this thing:

http://www.thingiverse.com/thing:52946

(i have stopped pursuing this routine since it doesn't apply when using Cura)

This should be a box with four walls instead of three.

I used 0.4mm Nozzle diameter and 0.4mm shell thickness.

Here is my complete profile. Just in case you need some other value:

[profile]

layer_height = 0.2

wall_thickness = 0.4

retraction_enable = True

solid_layer_thickness = 0.9

fill_density = 100

nozzle_size = 0.4

print_speed = 50

print_temperature = 210

print_temperature2 = 0

print_temperature3 = 0

print_temperature4 = 0

print_bed_temperature = 55

support = None

platform_adhesion = None

support_dual_extrusion = Both

wipe_tower = False

ooze_shield = False

filament_diameter = 2.85

filament_diameter2 = 0

filament_diameter3 = 0

filament_diameter4 = 0

filament_flow = 100.0

retraction_speed = 40.0

retraction_amount = 4.5

retraction_dual_amount = 16.5

retraction_min_travel = 1

retraction_combing = True

retraction_minimal_extrusion = 0.1

bottom_thickness = 0.3

object_sink = 1

overlap_dual = 0.2

travel_speed = 150.0

bottom_layer_speed = 30

infill_speed = 80

cool_min_layer_time = 5

fan_enabled = True

skirt_line_count = 1

skirt_gap = 3.0

skirt_minimal_length = 150.0

fan_full_height = 0.5

fan_speed = 25

fan_speed_max = 66

cool_min_feedrate = 0

cool_head_lift = False

solid_top = True

solid_bottom = True

fill_overlap = 100

support_fill_rate = 15

support_xy_distance = 1.5

support_z_distance = 0.2

spiralize = False

brim_line_count = 20

raft_margin = 5

raft_line_spacing = 1.0

raft_base_thickness = 0.3

raft_base_linewidth = 0.7

raft_interface_thickness = 0.2

raft_interface_linewidth = 0.2

fix_horrible_union_all_type_a = False

fix_horrible_union_all_type_b = False

fix_horrible_use_open_bits = False

fix_horrible_extensive_stitching = False

plugin_config = (lp1

.

object_center_x = -1

object_center_y = -1

[alterations]

start.gcode = ;Sliced at: {day} {date} {time}

;Basic settings: Layer height: {layer_height} Walls: {wall_thickness} Fill: {fill_density}

;Print time: {print_time}

;Filament used: {filament_amount}m {filament_weight}g

;Filament cost: {filament_cost}

;M190 S{print_bed_temperature} ;Uncomment to add your own bed temperature line

;M109 S{print_temperature} ;Uncomment to add your own temperature line

G21 ;metric values

G90 ;absolute positioning

M107 ;start with the fan off

G28 X0 Y0 ;move X/Y to min endstops

G28 Z0 ;move Z to min endstops

G1 Z15.0 F{travel_speed} ;move the platform down 15mm

G92 E0 ;zero the extruded length

G1 F200 E3 ;extrude 3mm of feed stock

G92 E0 ;zero the extruded length again

G1 F{travel_speed}

;Put printing message on LCD screen

M117 Printing...

end.gcode = ;End GCode

M104 S0 ;extruder heater off

M140 S0 ;heated bed heater off (if you have it)

G91 ;relative positioning

G1 E-1 F300 ;retract the filament a bit before lifting the nozzle, to release some of the pressure

G1 Z+0.5 E-5 X-20 Y-20 F{travel_speed} ;move Z up a bit and retract filament even more

G28 X0 Y0 ;move X/Y to min endstops, so the head is out of the way

M84 ;steppers off

G90 ;absolute positioning

start2.gcode = ;Sliced at: {day} {date} {time}

;Basic settings: Layer height: {layer_height} Walls: {wall_thickness} Fill: {fill_density}

;Print time: {print_time}

;Filament used: {filament_amount}m {filament_weight}g

;Filament cost: {filament_cost}

;M190 S{print_bed_temperature} ;Uncomment to add your own bed temperature line

;M104 S{print_temperature} ;Uncomment to add your own temperature line

;M109 T1 S{print_temperature2} ;Uncomment to add your own temperature line

;M109 T0 S{print_temperature} ;Uncomment to add your own temperature line

G21 ;metric values

G90 ;absolute positioning

M107 ;start with the fan off

G28 X0 Y0 ;move X/Y to min endstops

G28 Z0 ;move Z to min endstops

G1 Z15.0 F{travel_speed} ;move the platform down 15mm

T1 ;Switch to the 2nd extruder

G92 E0 ;zero the extruded length

G1 F200 E10 ;extrude 10mm of feed stock

G92 E0 ;zero the extruded length again

G1 F200 E-{retraction_dual_amount}

T0 ;Switch to the first extruder

G92 E0 ;zero the extruded length

G1 F200 E10 ;extrude 10mm of feed stock

G92 E0 ;zero the extruded length again

G1 F{travel_speed}

;Put printing message on LCD screen

M117 Printing...

end2.gcode = ;End GCode

M104 T0 S0 ;extruder heater off

M104 T1 S0 ;extruder heater off

M140 S0 ;heated bed heater off (if you have it)

G91 ;relative positioning

G1 E-1 F300 ;retract the filament a bit before lifting the nozzle, to release some of the pressure

G1 Z+0.5 E-5 X-20 Y-20 F{travel_speed} ;move Z up a bit and retract filament even more

G28 X0 Y0 ;move X/Y to min endstops, so the head is out of the way

M84 ;steppers off

G90 ;absolute positioning

support_start.gcode =

support_end.gcode =

cool_start.gcode =

cool_end.gcode =

replace.csv =

switchextruder.gcode = ;Switch between the current extruder and the next extruder, when printing with multiple extruders.

G92 E0

G1 E-36 F5000

G92 E0

T{extruder}

G1 X{new_x} Y{new_y} Z{new_z} F{travel_speed}

G1 E36 F5000

G92 E0