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Hello. I tryed alot with settings but i didnt get of this stringing on my prints. Anyone has an idea what i can change on my settings?

https://plus.google.com/photos/11410027 ... jfH0rs_tNg

My settings are:
ABS 1.75 filment

bottom_solid_layers = 2
bridge_flow_ratio = 1
bridge_speed = 30
brim_width = 0
complete_objects = 0
default_acceleration = 0
external_perimeter_speed = 80%
extra_perimeters = 1
extruder_clearance_height = 20
extruder_clearance_radius = 20
extrusion_width = 0
fill_angle = 0
fill_density = 0.2
fill_pattern = rectilinear
first_layer_extrusion_width = 0
first_layer_height = 0.3
first_layer_speed = 30%
gap_fill_speed = 30
gcode_comments = 0
infill_acceleration = 0
infill_every_layers = 1
infill_extruder = 1
infill_extrusion_width = 0
infill_speed = 30
layer_height = 0.2
min_skirt_length = 0
notes =
only_retract_when_crossing_perimeters =
output_filename_format = composition.gcode
perimeter_acceleration = 0
perimeter_extruder = 1
perimeter_extrusion_width = 0
perimeter_speed = 30
perimeters = 2
post_process =
randomize_start = 1
skirt_distance = 0
skirt_height = 2
skirts = 6
small_perimeter_speed = 30
solid_fill_pattern = rectilinear
solid_infill_below_area = 10
solid_infill_every_layers = 0
solid_infill_speed = 30
support_material =
support_material_angle = 0
support_material_extruder = 1
support_material_extrusion_width = 0
support_material_pattern = rectilinear
support_material_spacing = 2.5
support_material_speed = 30
support_material_threshold = 0
threads = 4
top_solid_infill_speed = 30
top_solid_layers = 5
travel_speed = 300
bed_size = 280,280
end_gcode = M104 S0 ; turn off temperature\nM140 S0\nG28
extruder_offset = 0x0
gcode_flavor = reprap
layer_gcode =
nozzle_diameter = 0.3
print_center = 0,0
retract_before_travel = 5
retract_length = 0.1
retract_length_toolchange = 0
retract_lift = 0.5
retract_restart_extra = 0
retract_restart_extra_toolchange = 0
retract_speed = 55
start_gcode = G28\nG1 Z300 F7500
toolchange_gcode =
use_relative_e_distances = 0
vibration_limit = 0
z_offset = 0
bed_temperature = 55
bridge_fan_speed = 100
cooling = 1
disable_fan_first_layers = 1
extrusion_multiplier = 1,1,1
fan_always_on = 0
fan_below_layer_time = 60
filament_diameter = 1.75,75,1.75,75,1.75,75
first_layer_bed_temperature = 55
first_layer_temperature = 225,225,225
max_fan_speed = 100
min_fan_speed = 35
min_print_speed = 6
slowdown_below_layer_time = 20
temperature = 215,215,215

I tryed a retract length with 1mm but without any diffrent in stringing.

Retract with 1mm is not enough on the Rostock's Bowden setup in my opinion. Try 5 and even 10. I am assuming you are using Slic3r? The issue with using a lot retract is the phenomenon I reported in my thread on hydraulic jamming. I am writing a more detailed post about it. But basically, if your slicer is doing a lot of short moves, each of these will have a retract/extend cycle. That jack-hamering leads to a temporary clog. KISSlicer has an alternative way of dealing with stringing and blobing call "wipe" that backs the nozzle over the filament it just laid down before moving.

Yes i usw Slic3r.
Changing the retract doesn't solve the problem with stringing..
No change from 0,1 - 1mm with stringing
1,5mm or more retract and the hotend don't get or fast enough filment for a clean print without holes.

I tryed the option retract_restart_extra with 1mm and retract with 1,5mm = holes in the wall.

Is the stringing problem abs only or also with pla and nylon?

Looks like the Rostock bowden can't pullback the filament fast or accurate enough.


Is Kisslicer better then Slic3er with stringing?

Many of us print with ABS on our Rostocks. After a bit of work, I have stringing under control. I suggested 5 to 10 mm. Try it, and on the retract restart extra use exactly the same number or you might get filament starving if it is lower.

KISS' wipe feature does do a nice job with minimizing stringing in my experience. I was a Slic3r user until recently primarily due to stringing.