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Problem like stringing but different

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Hi!

I have a problem like stringing but it seems to appear not when moving from the print away but moving towards the print. The rest of the print is just fine and I tried all kind of retraction settings, temperature, travel/print speed but the result is always the same. It apperars with different PLA`s and even with rubber or Biofila Linen.

Thanks in advance for any helpful tips!

Gerd

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Does it appear on other models?

I had some artifacts like that (kind of) that i couldn't understand, and it came from the model (or from cura slicing the model).

Can you check in layerview maybe?

Anyway if it's a general issue, to avoid oozing you have to print slow and as cold as possible. Increasing the travel speed to 250mm/s is good also (assuming you have a um2)

Could you had your printer to your profile?

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It seems like you are using a variety of materials.

Could you do a list of what materials you are using?

Usually, if you use an Ultimaker / Colorfabb PLA you should be able to use a regular CURA-profile. (50mm/s - 210ºC - 10%infill - default retraction settings)

You could run it through Netfabb to fix your model, if you are worried it is not optimized for 3D printing.

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1) It looks like a batmobile!

2) why would it be coming inward to a wall? Is there another part like valcrow asks?

3) What is your layer setting? That looks very fine - I have troubles when I go much thinner than .06mm. Or at least I get different issues. Do you have retraction turned on? Actually why don't you do "file" "save profile" and then post the entire file here please.

what these *look* like to me are when I do "cool head lift" on a small layer and the head moves away from the part for 5 seconds and some pla leaks out and then when the head returns to the print it adds a little tail to the print. These tails are very easy to remove. But you seem to be getting tails on layers where the head should never leave the outer shell.

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Thanks @all!

I am using the ultimaker 2

Print has wall thickness 0.8mm, 20% infill

Layer height 0.08mm

Print Speed 40mm/s

Travel Speed 200mm/s

with "towards the print" I mean, that there is no string which comes from moving away (for example away from the Cockpit to the rear wing fender in this special case) but it seems a bit like the material comes out too early while travelling to the next part of the model. Problem ist that it appears constantly until the temperature is so low that the print totally Fails. This with PLA, Biofila Linen and Ninja Flex.

What means "cool head lift"?

Slicing preview Shows nothing that could lead up to those Problems and it appears even with simple geometrics.

And no, it is not the batmobile, it is the Ligier JS P2

Batmobile ist already done in 1/24:

Datei%2021.06.15%2012%2021%2000.jpeg

Datei%2021.06.15%2012%2022%2001.jpeg

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I see - it's happening when you move from one fin to the next. I suspect that retraction isn't always happening. To make sure retraction always happens there are many settings.

 

There are 6 retraction related settings:

1) Make sure retraction is checked on basic/quality

2) In expert settings set minimum travel to 0mm or at least something small like 1mm.

3) In expert settings set "minimal extrusion..." to 0 or something well under .1mm. There is a 160X factor on this for .1mm layers so if you extrude .02mm filament you will get 3.2mm of straight line extruding. So the default is to not retract if you print for less than 3.2mm of linear printing (for .1mm layers).

4) In expert settings you can set "combing" on or off - it shouldn't make a huge difference for this part.

5,6) For the UM Original, you can also control the amount and speed of retraction. I recommend 40mm/sec (which works well for old and new Marlin firmware) and if you printed this part then 4.5mm retraction should be about perfect:

http://www.thingiverse.com/thing:46157

So for you make sure that #2 and #3 are both set to 0 for this print. This should reduce your stringing. Or you can try a different filament. I find that white PLA tends to string much more than other colors.

For UM2, #5 and #6 are on the UM2 controller, not in cura.

Edited by Guest

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Did you try another color filament?  I'm pretty sure that will fix your problem.

 

Thank you for the response but exactly the same issue apperars with:

-Ultimaker PLA

- Ninjaflex

- Biofila Linen

- Ultimaker Flex

- Colorfabb PLA

Every material even tried to lower temperature but the problem stays until it goes over to underextrusion

To blame it on the material was one of my first reactions

Perhaps the travel speed is too high with 200mm/s? But I once saw that it should make things even better.

This evening I`ll try to stiffen the feeder, perhaps the filament is not really gripped by the feeder when fast retracted.

Or maybe a problem with a damaged nozzle?! I keep trying...

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It looks like something that should be printing is not printing, such as some support that does not adhere properly to the surface of a curve, and consequently dribbles plastic everywhere.

What you need to do is check the print whilst it is running against the layer view in Cura, and see if every support is being printed correctly.

Or, you might have a section that is unsupported and not printing of course, and that's causing the dribble everywhere.

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Could you just save your profile settings to an ini file and then just cut and paste the entire ini file here please? I want to look at every one of your 100 or so settings.

The 200mm/sec is fine. I have seen these little strings before but they are rare - I've never seen so many on one part.

You could indeed look at your nozzle tip - I recommend using a cell phone to take a picture as those usually are good at close up photography.

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Here are my current Settings, at the Moment trying small massive parts with Nylon for the first time. I will post a Picture from the nozzle after the Job is done.

Thanks in advance for your effort!

[profile]

layer_height = 0.08

wall_thickness = 0.8

retraction_enable = True

solid_layer_thickness = 0.8

fill_density = 100

nozzle_size = 0.4

print_speed = 50

print_temperature = 210

print_temperature2 = 0

print_temperature3 = 0

print_temperature4 = 0

print_temperature5 = 0

print_bed_temperature = 70

support = Everywhere

platform_adhesion = Brim

support_dual_extrusion = Both

wipe_tower = False

wipe_tower_volume = 15

ooze_shield = False

filament_diameter = 2.85

filament_diameter2 = 0

filament_diameter3 = 0

filament_diameter4 = 0

filament_diameter5 = 0

filament_flow = 100.0

retraction_speed = 40.0

retraction_amount = 4.5

retraction_dual_amount = 16.5

retraction_min_travel = 1

retraction_combing = Off

retraction_minimal_extrusion = 0.05

retraction_hop = 0,075

bottom_thickness = 0.3

layer0_width_factor = 100

object_sink = 0

overlap_dual = 0.15

travel_speed = 200

bottom_layer_speed = 20

infill_speed = 0.0

solidarea_speed = 0.0

inset0_speed = 0.0

insetx_speed = 0.0

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 = 100

fan_speed_max = 100

cool_min_feedrate = 10

cool_head_lift = False

solid_top = True

solid_bottom = True

fill_overlap = 15

support_type = Lines

support_angle = 60

support_fill_rate = 18

support_xy_distance = 0.75

support_z_distance = 0.18

spiralize = False

simple_mode = False

brim_line_count = 10

raft_margin = 5.0

raft_line_spacing = 3.0

raft_base_thickness = 0.3

raft_base_linewidth = 1.0

raft_interface_thickness = 0.27

raft_interface_linewidth = 0.4

raft_airgap_all = 0.0

raft_airgap = 0.22

raft_surface_layers = 2

raft_surface_thickness = 0.27

raft_surface_linewidth = 0.4

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

M82 ;set extruder to absolute mode

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

;{profile_string}

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

;{profile_string}

start3.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

T2 ;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}

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...

end3.gcode = ;End GCode

M104 T0 S0 ;extruder heater off

M104 T1 S0 ;extruder heater off

M104 T2 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

;{profile_string}

start4.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 T2 S{print_temperature2} ;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

T3 ;Switch to the 4th 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}

T2 ;Switch to the 3th 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}

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...

end4.gcode = ;End GCode

M104 T0 S0 ;extruder heater off

M104 T1 S0 ;extruder heater off

M104 T2 S0 ;extruder heater off

M104 T3 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

;{profile_string}

support_start.gcode =

support_end.gcode =

cool_start.gcode =

cool_end.gcode =

replace.csv =

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

;This code is added before the T(n)

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

;This code is added after the T(n)

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I was hoping for the profile for the car at the top photo. If you still have the gcode you can do "load profile from gcode" and then save out the profile to an ini file.

Anyway a few things popped out at me:

retraction_hop = 0,075

This alone could be the problem. I've never used hop on retraction as I'm told it causes stringing. It's recommended only for delta printers I believe.

The only other thing is some of the parameters I don't recognize and I'm wondering if you are using the beta version of Cura - all versions after 15.4.* are now labelled Beta and not recommended except for experimenting.

Nyon - well nylon is definitely harder to print. I get much more oozing with nylon than normal. You really need to bake it in the oven for an hour just before you print with it as it absorbs water quickly. You probably hear it sizzling as it prints - that's the water boiling. More details I believe on the taulman website. Or maybe I read it somewhere else.

I found that I can usually not preheat the nylon if I use taulman bridge and print it a bit cooler. But other nylons (most nylons) need to be dried right up until the moment of printing if you want good quality.

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Here`s the gcode from the car.

[profile]

layer_height = 0.08

wall_thickness = 0.4

retraction_enable = True

solid_layer_thickness = 0.6

fill_density = 15

nozzle_size = 0.4

print_speed = 60

print_temperature = 210

print_temperature2 = 0

print_temperature3 = 0

print_temperature4 = 0

print_temperature5 = 0

print_bed_temperature = 70

support = Everywhere

platform_adhesion = Brim

support_dual_extrusion = Both

wipe_tower = False

wipe_tower_volume = 15

ooze_shield = False

filament_diameter = 2.85

filament_diameter2 = 0

filament_diameter3 = 0

filament_diameter4 = 0

filament_diameter5 = 0

filament_flow = 100.0

retraction_speed = 40.0

retraction_amount = 4.5

retraction_dual_amount = 16.5

retraction_min_travel = 1.5

retraction_combing = All

retraction_minimal_extrusion = 0.02

retraction_hop = 0.0

bottom_thickness = 0.3

layer0_width_factor = 100

object_sink = 0.0

overlap_dual = 0.15

travel_speed = 150.0

bottom_layer_speed = 20

infill_speed = 0.0

solidarea_speed = 0.0

inset0_speed = 0.0

insetx_speed = 0.0

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 = 100

fan_speed_max = 100

cool_min_feedrate = 10

cool_head_lift = False

solid_top = True

solid_bottom = True

fill_overlap = 15

support_type = Lines

support_angle = 60

support_fill_rate = 15

support_xy_distance = 0.7

support_z_distance = 0.15

spiralize = False

simple_mode = False

brim_line_count = 5

raft_margin = 5.0

raft_line_spacing = 3.0

raft_base_thickness = 0.3

raft_base_linewidth = 1.0

raft_interface_thickness = 0.27

raft_interface_linewidth = 0.4

raft_airgap_all = 0.0

raft_airgap = 0.22

raft_surface_layers = 2

raft_surface_thickness = 0.27

raft_surface_linewidth = 0.4

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 =

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

M82 ;set extruder to absolute mode

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

;{profile_string}

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

;{profile_string}

start3.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

T2 ;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}

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...

end3.gcode = ;End GCode

M104 T0 S0 ;extruder heater off

M104 T1 S0 ;extruder heater off

M104 T2 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

;{profile_string}

start4.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 T2 S{print_temperature2} ;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

T3 ;Switch to the 4th 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}

T2 ;Switch to the 3th 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}

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...

end4.gcode = ;End GCode

M104 T0 S0 ;extruder heater off

M104 T1 S0 ;extruder heater off

M104 T2 S0 ;extruder heater off

M104 T3 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

;{profile_string}

support_start.gcode =

support_end.gcode =

cool_start.gcode =

cool_end.gcode =

replace.csv =

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

;This code is added before the T(n)

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

;This code is added after the T(n)

Not sure but I think I enabled z hop later when trying to avoid the strings. Nevertheless I will try again without z-hop, would be so cool if this fixes the Problem.

To make it clear: There was a time when printing was absolutely fine. It occured some day and I first blamed it on the material then on the Settings... So if I print a single object as the Robot it works fine but when it Comes into travelling of the Printer head the pain starts

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Although I don't think those pumpkin bumps had anything to do with retraction - you just get better quality at lower speeds. That was a UMO that had loose belts but still I get much better quality at 35mm/sec than 50 or 60.

Your nozzle is blurry but it looks fine to me. I can see it has a complete ring that is about the same width as the nozzle hole. In other words nozzle shoulder is 3X diameter of nozzle hole which is normal.

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So I worked everything out:

- Actual Cura 15.04.3

- Actual Marlin Firmware

- Reset to factory Settings before

- Printspeed down to 35mm/s

- Cleaned the nozzle

This is the result:

Foto%2020.11.15%2C%2017%2054%2059.jpg

I don`t know what to do anymore. Print results are fine when cleaned but this should go better!!!

Perhaps I go for a new nozzle as a last chance to get rid of this?!

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