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Stops Extruding around the same point on a piece
Posted: Thu Sep 17, 2015 8:24 pm
by mehmeh
So I made a device case (hollow box top and bottom halves) that I'm trying to print, but for some reason the extruder just stops extruding when I get to the surface of the inside. It tries to do the 100% fill on the top surface, and then about a third of the way through the layer it just stops extruding. I've done this 3 times now with the same results. Each time this happens, I have to reverse out the filament and then feed it back through to get it to extrude again.
I printed a very similar part the other day and this did not happen.
Re: Stops Extruding around the same point on a piece
Posted: Thu Sep 17, 2015 8:36 pm
by jsc
What filament/temperature/speed are you using? That can happen with, for example, PETG when trying to extrude too fast with too high an extrusion multiplier on infill. You may be stripping out.
Re: Stops Extruding around the same point on a piece
Posted: Thu Sep 17, 2015 8:40 pm
by mehmeh
I'm using PLA 1.75 mm at 220 as per the instructions. Doing 60 mm/s
Re: Stops Extruding around the same point on a piece
Posted: Thu Sep 17, 2015 11:04 pm
by Jules
Those are okay speeds for PLA, although the temp is a little high. Check the filament diameter to make sure that it is still the same as it was when you calibrated the first time (there might be a thick spot in the filament).
After that, check your Filament Drive screw tension:
viewtopic.php?f=3&t=2694
If that doesn't fix the problem, you might have a partial clog.
Re: Stops Extruding around the same point on a piece
Posted: Fri Sep 18, 2015 7:43 pm
by mehmeh
Adjusted the tension and tried to make sure there wasn't a clog by trying to clean the hot end with an allen wrench like some of the other posts have suggested. Still messed up on the top surface. Filament diameter is sitting at about 1.8 mm.
It's weird because the part prints fine with a 50% infill just fine, but as soon as it gets to that top surface, it just stops extruding half way through.
Re: Stops Extruding around the same point on a piece
Posted: Fri Sep 18, 2015 7:57 pm
by jsc
Are you using S3D? Package up your project as a factory file and we can try to see if there is anything obvious.
Re: Stops Extruding around the same point on a piece
Posted: Fri Sep 18, 2015 8:35 pm
by mehmeh
Re: Stops Extruding around the same point on a piece
Posted: Fri Sep 18, 2015 9:28 pm
by jsc
Okay, one thing that catches the eye: you have specified a 3mm filament width. You are probably not using 3mm filament.
Also, your extrusion and height settings are aggressive for a .35mm nozzle. Try setting nozzle diameter to .4, layer height to .2, and see if that works. You can then try upping them again if it does.
You'll also want to carry out some extrusion calibration, check out Jules' recent step by step guide for beginners for details.
Re: Stops Extruding around the same point on a piece
Posted: Mon Sep 21, 2015 1:11 pm
by mehmeh
Sorry, there are different configs in that file that I forgot about, which you're referencing. I've been using a 0.2mm layer height and 1.75mm as my filament diameter.
The ones I'm using are these:
Code: Select all
[filament:Maker PLA painters]
bed_temperature = 0
bridge_fan_speed = 100
cooling = 0
disable_fan_first_layers = 1
extrusion_multiplier = 1
fan_always_on = 1
fan_below_layer_time = 120
filament_colour = #000000
filament_diameter = 1.75
first_layer_bed_temperature = 0
first_layer_temperature = 220
max_fan_speed = 100
min_fan_speed = 100
min_print_speed = 15
slowdown_below_layer_time = 20
temperature = 220
[presets]
filament = Maker PLA painters.ini
print = M2General091.ini
printer = MakerGear M2.ini
[print:M2General091]
avoid_crossing_perimeters = 1
bottom_solid_layers = 2
bridge_acceleration = 0
bridge_flow_ratio = 1
bridge_speed = 180
brim_width = 0
complete_objects = 0
default_acceleration = 0
dont_support_bridges = 0
external_fill_pattern = rectilinear
external_perimeter_extrusion_width = 0
external_perimeter_speed = 60
external_perimeters_first = 0
extra_perimeters = 1
extruder_clearance_height = 20
extruder_clearance_radius = 20
extrusion_width = 0
fill_angle = 45
fill_density = 40%
fill_pattern = rectilinear
first_layer_acceleration = 0
first_layer_extrusion_width = 0
first_layer_height = 100%
first_layer_speed = 30%
gap_fill_speed = 20
gcode_comments = 0
infill_acceleration = 0
infill_every_layers = 1
infill_extruder = 1
infill_extrusion_width = 0
infill_first = 0
infill_only_where_needed = 0
infill_overlap = 5%
infill_speed = 60
interface_shells = 0
layer_height = 0.2
max_print_speed = 80
max_volumetric_speed = 0
min_skirt_length = 0
notes =
only_retract_when_crossing_perimeters = 1
ooze_prevention = 0
output_filename_format = [input_filename_base]([timestamp])([version]).gcode
overhangs = 1
perimeter_acceleration = 0
perimeter_extruder = 1
perimeter_extrusion_width = 0
perimeter_speed = 60
perimeters = 3
post_process =
raft_layers = 0
resolution = 0
seam_position = aligned
skirt_distance = 20
skirt_height = 1
skirts = 2
small_perimeter_speed = 60
solid_infill_below_area = 70
solid_infill_every_layers = 0
solid_infill_extruder = 1
solid_infill_extrusion_width = 0
solid_infill_speed = 60
spiral_vase = 0
standby_temperature_delta = -5
support_material = 0
support_material_angle = 0
support_material_contact_distance = 0.2
support_material_enforce_layers = 0
support_material_extruder = 1
support_material_extrusion_width = 0
support_material_interface_extruder = 1
support_material_interface_layers = 3
support_material_interface_spacing = 1
support_material_interface_speed = 100%
support_material_pattern = pillars
support_material_spacing = 2.5
support_material_speed = 60
support_material_threshold = 0
thin_walls = 0
threads = 7
top_infill_extrusion_width = 0
top_solid_infill_speed = 60
top_solid_layers = 2
travel_speed = 300
xy_size_compensation = 0
[printer:MakerGear M2]
bed_shape = 0x0,200x0,200x250,0x250
before_layer_gcode =
end_gcode = M104 S0 ; turn off temperature\nM140 S0; turn off hot bed plate\nG28 X0 ; home X axis\nM84 ; disable motors\n
extruder_offset = 0x0
gcode_flavor = reprap
layer_gcode =
nozzle_diameter = 0.4
octoprint_apikey =
octoprint_host =
pressure_advance = 0
retract_before_travel = 2
retract_layer_change = 0
retract_length = 2
retract_length_toolchange = 10
retract_lift = 0
retract_restart_extra = 0
retract_restart_extra_toolchange = 0
retract_speed = 40
start_gcode = G28 ; home all axes\nG1 Z5 F5000 ; lift nozzle\n
toolchange_gcode =
use_firmware_retraction = 0
use_relative_e_distances = 0
use_volumetric_e = 0
vibration_limit = 0
wipe = 0
z_offset = 0
Re: Stops Extruding around the same point on a piece
Posted: Tue Sep 22, 2015 3:38 pm
by mehmeh
So it appears that it just didn't like the 180 mm/s bridge speed. It was treating the first solid top layer as a bridge layer and blowing through it really fast, which caused the jam. I took the bridge speed down to 80mm/s and was able to get it to print fine.