no holes at all (almost)

hi there,
just tried slicing the supersimple attached 8mm ring with 4 mm bore.
in the first layer, it prints the inner hole, but on subsequent layers its closed.
if i scale to 200% it works out fine...
smells like the '100% infill on small layers' feature

just to let you know, maybe someone have a fix ?
using 0.84

grtx

I tried using Version 0.8.3, it's ok.

Here my config.ini:

acceleration = 0
bed_size = 200,200
bed_temperature = 0
bridge_fan_speed = 100
bridge_flow_ratio = 1
bridge_speed = 40
complete_objects = 0
cooling = 1
disable_fan_first_layers = 0
duplicate = 1
duplicate_distance = 6
duplicate_grid = 1,1
end_gcode = M104 S0 ; turn off temperature\nG28 X0 ; home X axis\nM84 ; disable motors
extruder_clearance_height = 20
extruder_clearance_radius = 20
extrusion_axis = E
extrusion_multiplier = 1
extrusion_width = 0
fan_always_on = 1
fan_below_layer_time = 60
filament_diameter = 1.7
fill_angle = 45
fill_density = 0.4
fill_pattern = rectilinear
first_layer_bed_temperature = 0
first_layer_extrusion_width = 0
first_layer_height = 0.25
first_layer_speed = 50%
first_layer_temperature = 195
g0 = 0
gcode_arcs = 0
gcode_comments = 0
gcode_flavor = reprap
infill_acceleration = 50
infill_every_layers = 1
infill_extrusion_width = 0
infill_speed = 60
layer_gcode =
layer_height = 0.25
max_fan_speed = 100
min_fan_speed = 100
min_print_speed = 20
notes =
nozzle_diameter = 0.35
output_filename_format = [input_filename_base].gcode
perimeter_acceleration = 25
perimeter_speed = 50
perimeters = 2
perimeters_extrusion_width = 0
post_process =
print_center = 100,100
randomize_start = 1
retract_before_travel = 2
retract_length = 1.5
retract_lift = 0
retract_restart_extra = 0
retract_speed = 30
rotate = 0
scale = 1
skirt_distance = 6
skirt_height = 1
skirts = 2
slowdown_below_layer_time = 10
small_perimeter_speed = 25
solid_fill_pattern = rectilinear
solid_infill_speed = 50
solid_layers = 2
start_gcode = G28 ; home all axes
support_material = 0
support_material_tool = 0
temperature = 195
threads = 2
top_solid_infill_speed = 50
travel_speed = 100
use_relative_e_distances = 1
z_offset = 0

I also tried with Version 0.8.4. it seems to be ok with my config.ini.

You can use e.g. Pleasant3D or Repetier-Host (I use Repetier-Host Mac) to analyze your Gcode-File.

Edited 1 time(s). Last edit at 07/13/2012 01:20AM by flurin.

tried again, it works if i change the nozzle diameter to 0.35

too bad i have a 0.5 nozzle...

grtx

You can lie about your nozzle size being tinier than what it actually is, and successfully print the resulting gcode.
Less plastic will get pushed, resulting in narrower extruded filament.

Give it a try, probably there are some limits you cannot cross - for instance asking .1mm wide extrusion with a .5 nozzle seems a bit too much, but only experimentation will tell.

---

Most of my technical comments should be correct, but is THIS one ?
Anyway, as a rule of thumb, always double check what people write.

I tried lying about the nozzle size but, although fixing the extrusion width issue, I found that generally the print quality was a lot worse with gaps between solid layer extrusions and poor adhesion to the print bed.

These problems, for me have almost completely been fixed by using 0.8.5dev new flow branch. The extrusion width is still very slightly over size but the other problems that were caused by 'lying' about the nozzle diameter have been rectified. So, now, putting in the correct nozzle size produces assemblies that fit together where as, with 0.8.4, they didn't by half a millimeter.

I'm hoping to meet with RichRap tomorrow and hope to fully understand this issue (and many others) by the end of the day.

DeuxVis Wrote:
-------------------------------------------------------
> You can lie about your nozzle size being tinier
> than what it actually is, and successfully print
> the resulting gcode.
> Less plastic will get pushed, resulting in
> narrower extruded filament.
>
> Give it a try, probably there are some limits you
> cannot cross - for instance asking .1mm wide
> extrusion with a .5 nozzle seems a bit too much,
> but only experimentation will tell.

---

Using ABSPrusa Mendel Zaphod with Pronterface and slic3r 1.3.0. Printing well with 3mm PLA and ABS through 2 x J Head Mk IV b and Wade Geared Exruders. Controlled using RAMPS1.4 board running Marlin_v1.1.9