Slicing Settings - need help

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cheran
Noob
Posts: 3
Joined: Wed Mar 20, 2013 7:42 am

Slicing Settings - need help

Post by cheran »

Hello everyone,
I'm beginner or first time user of 3d printing machine (just assembled Rostock MAX). Now I'm trying to print calibration pyramide object and need help on slicing settings (g-code generation). How to get rid of defects shown in the picture.
20032013660.jpg
Probably it's connected with retraction or z-lift settings.

I tryed slice3r, skeinforge, kisslicer and cura 13.03 to generate g-code. For now I stopped on cura (even I have some question with black screen).

Now I have following slice/printer settings

[profile]
filament_diameter = 1.75
nozzle_size = 0.5
wall_thickness = 1
layer_height = 0.3
retraction_enable = True
solid_layer_thickness = 0.6
fill_density = 0
print_speed = 30
print_temperature = 228
print_bed_temperature = 55
support = None
enable_raft = True
filament_density = 0.85
skirt_line_count = 1
skirt_gap = 3.0
retraction_min_travel = 0.1
retraction_speed = 30
retraction_amount = 1.5
retraction_extra = 0.0
travel_speed = 200
max_z_speed = 3.0
bottom_layer_speed = 30
cool_min_layer_time = 5
fan_enabled = False
bottom_thickness = 0.3
enable_skin = False
plugin_config =
flip_x = False
flip_y = False
flip_z = False
swap_xz = False
swap_yz = False
model_scale = 1.0
model_rotate_base = 0
extra_base_wall_thickness = 0.0
cool_min_feedrate = 10
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
hop_on_move = False

[alterations]
start.gcode = ;Sliced {filename} 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}
G21 ;metric values
G90 ;absolute positioning
M107 ;start with the fan off
G28
G1 Z300 F7500
;G28 X0 Y0 ;move X/Y to min endstops
;G28 Z0 ;move Z to min endstops
;G92 X0 Y0 Z0 E0 ;reset software position to front/left/z=0.0
G1 Z15.0 F{max_z_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}
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
nextobject.gcode = ;Move to next object on the platform. clear_z is the minimal z height we need to make sure we do not hit any objects.
G92 E0
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 F{travel_speed} ;move Z up a bit and retract filament even more
G90 ;absolute positioning
G1 Z{clear_z} F{max_z_speed}
G92 E0
G1 X{object_center_x} Y{object_center_x} F{travel_speed}
G1 F200 E6
G92 E0
replace.csv =

Thank you in advance.
User avatar
MorbidSlowBurn
Printmaster!
Posts: 169
Joined: Sun Mar 03, 2013 5:33 pm

Re: Slicing Settings - need help

Post by MorbidSlowBurn »

The calibration pyramid is a little tough for a first print. Too many setting that will impact the quality. You should start with a single wall cube or cylinder to get extrusion rates dialed in. Retraction and lift should not be enabled during the single wall prints to reduce the variables you are dealing with. You do want to watch speed and size of the part as too small and too fast will introduce too much heat in the part which can cause collapse (the top of the pyramid is a challenge area for heat).

Once you get single wall dialed in go for infill then lift/retraction.
User avatar
fredini
Printmaster!
Posts: 61
Joined: Thu Dec 20, 2012 2:57 pm
Location: Coney Island, New York
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Re: Slicing Settings - need help

Post by fredini »

Use the essential Calibration set on thingiverse:
http://www.thingiverse.com/thing:5573

Start with the thin walled cube, then solid cube...
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