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Problems in printing with PLA

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Hello to all.

Here is a new member of this magnificent forum.

I have bought my Ultimaker just one month ago and looking forward to learn exploit this miracle machine.

" If you want some honey be prepared to wasp's sting" as they said.

Some problems needs to be solved.

I have tried to print couple of parts loaded from Thingiverse with my Ultimaker.

With ABS printer worked very well but when I changed filament to PLA, troubles began.

First printer make the "grid net" below the object just fine but some 10-15 layers after, appears the first loose strings.

This means that object printing must be canceled to avoid waste of filament.

I have Cura 12.08 on my computer and it works well with the Ultimaker.

Here is the profile of printing parameters that with I tried to print PLA:


machine_center_x = 100

machine_center_y = 100

flip_x = False

flip_y = False

flip_z = False

swap_xz = False

swap_yz = False

model_scale = 1.0

model_rotate_base = 0

filament_diameter = 3.1

nozzle_size = 0.4

layer_height = 0.1

wall_thickness = 1.2

solid_layer_thickness = 0.6

fill_density = 30

skirt_line_count = 1

skirt_gap = 6.0

print_speed = 50

print_temperature = 0

support = None

enable_raft = False

filament_density = 1.00

retraction_min_travel = 5.0

retraction_speed = 40.0

retraction_amount = 0.0

retraction_extra = 0.0

travel_speed = 150

max_z_speed = 3.0

bottom_layer_speed = 15

cool_min_layer_time = 10

fan_enabled = True

bottom_thickness = 0.2

enable_skin = False

extra_base_wall_thickness = 0.0

cool_min_feedrate = 5

fan_layer = 1

fan_speed = 100

fan_speed_max = 100

raft_margin = 5

raft_base_material_amount = 100

raft_interface_material_amount = 100

support_rate = 50

support_distance = 0.5

infill_type = Line

solid_top = True

fill_overlap = 15

bridge_speed = 100

sequence = Loops > Perimeter > Infill

force_first_layer_sequence = True

joris = False

retract_on_jumps_only = True

enable_dwindle = False

dwindle_pent_up_volume = 0.4

dwindle_slowdown_volume = 5.0

What can I do to get my Ultimaker to print PLA properly?

Can someone please help me?



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