Dialed in at one layer height but not another  

Re: Dialed in at one layer height but not another

I had read 80% of nozzle diameter is max layer height

This statement answers question 1. I'm not sure why Prusa decided to add a .35mm layer height preset in Slic3r but in my opinion they should have made it for .30mm. If I go above .30mm with a .4 nozzle I get the same issues as you.

Max width should be no more than 120% of nozzle size. For a .25mm nozzle that would come out to .30 for layer width.

Re: Dialed in at one layer height but not another

Awesome thank you

Re: Dialed in at one layer height but not another

Ok so here are my settings for the 0.8 nozzle so far and first later went down great but next 2 perimeters were essentially into thin air. they laid down nice but didn't stick to themselves or to the bottom layer. subsequent infill layer went down nicely. but as the model builds I don't see how it will hold since it's not attached at the bottom.

Re: Dialed in at one layer height but not another

Re: Dialed in at one layer height but not another

suggestions? didn't have to deal with all this with smaller nozzles.
Z-height is adjusted but my understanding is that only applies to 1st layer anyway.

if it helps here is the g-code that slic3r generated for the object

i took out most of the coordinates to get it to allow me to post the code

======================================================


; generated by Slic3r 1.31.6-prusa3d-win64 on 2017-01-22 at 14:16:23

; avoid_crossing_perimeters = 0
; bed_shape = 0x0,250x0,250x210,0x210
; bed_temperature = 60
; before_layer_gcode =
; bridge_acceleration = 1000
; bridge_fan_speed = 100
; brim_width = 0
; complete_objects = 0
; cooling = 1
; default_acceleration = 1000
; disable_fan_first_layers = 1
; duplicate_distance = 6
; end_gcode = G4 ; wait\nM104 S0 ; turn off temperature\nM140 S0 ; turn off heatbed\nM107 ; turn off fan\nG91 ; relative movements\nG1 F150 ; slow Z rate\nG1 Z15 ; Z up 15mm\nG90 ; back to absolute\nG1 X0 Y200 Z30; home X axis\nM84 ; disable motors
; extruder_clearance_height = 20
; extruder_clearance_radius = 20
; extruder_offset = 0x0
; extrusion_axis = E
; extrusion_multiplier = 1.046
; fan_always_on = 1
; fan_below_layer_time = 100
; filament_colour = #00FF00
; filament_diameter = 1.75
; filament_max_volumetric_speed = 0
; filament_notes = "List of materials tested with standart PLA print settings for MK2:\n\nEsun PLA\nFiberlogy HD-PLA\nFillamentum PLA\nFloreon3D\nHatchbox PLA\nPlasty Mladeč PLA\nPrimavalue PLA\nProto pasta Matte Fiber"
; first_layer_acceleration = 1000
; first_layer_bed_temperature = 60
; first_layer_extrusion_width = 0.94
; first_layer_speed = 50%
; first_layer_temperature = 215
; gcode_arcs = 0
; gcode_comments = 0
; gcode_flavor = reprap
; infill_acceleration = 2000
; infill_first = 0
; layer_gcode =
; max_fan_speed = 100
; max_print_speed = 100
; max_volumetric_extrusion_rate_slope_negative = 0
; max_volumetric_extrusion_rate_slope_positive = 0
; max_volumetric_speed = 0
; min_fan_speed = 85
; min_print_speed = 15
; min_skirt_length = 4
; notes =
; nozzle_diameter = 0.8
; only_retract_when_crossing_perimeters = 0
; ooze_prevention = 0
; output_filename_format = [input_filename_base].gcode
; perimeter_acceleration = 800
; post_process =
; pressure_advance = 0
; resolution = 0
; retract_before_travel = 1
; retract_layer_change = 1
; retract_length = 0.8
; retract_length_toolchange = 3
; retract_lift = 0.5
; retract_lift_above = 0
; retract_lift_below = 199
; retract_restart_extra = 0
; retract_restart_extra_toolchange = 0
; retract_speed = 35
; skirt_distance = 2
; skirt_height = 1
; skirts = 1
; slowdown_below_layer_time = 25
; spiral_vase = 0
; standby_temperature_delta = -5
; start_gcode = M115 U3.0.9 ; tell printer latest fw version\nM83 ; extruder relative mode\nM104 S[first_layer_temperature] ; set extruder temp\nM140 S[first_layer_bed_temperature] ; set bed temp\nM190 S[first_layer_bed_temperature] ; wait for bed temp\nM109 S[first_layer_temperature] ; wait for extruder temp\nG28 W ; home all without mesh bed level\nG80 ; mesh bed leveling\nG1 Y-3.0 F1000.0 ; go outside pritn area\nG1 X60.0 E9.0 F1000.0 ; intro line\nG1 X100.0 E12.5 F1000.0 ; intro line
; temperature = 210
; threads = 4
; toolchange_gcode =
; travel_speed = 100
; use_firmware_retraction = 0
; use_relative_e_distances = 1
; use_volumetric_e = 0
; wipe = 0
; z_offset = 0
; dont_support_bridges = 1
; extrusion_width = 0.94
; first_layer_height = 0.5
; infill_only_where_needed = 0
; interface_shells = 0
; layer_height = 0.6
; raft_layers = 0
; seam_position = nearest
; support_material = 0
; support_material_angle = 0
; support_material_buildplate_only = 0
; support_material_contact_distance = 0.1
; support_material_enforce_layers = 0
; support_material_extruder = 1
; support_material_extrusion_width = 0.35
; support_material_interface_extruder = 1
; support_material_interface_layers = 0
; support_material_interface_spacing = 0
; support_material_interface_speed = 100%
; support_material_pattern = rectilinear
; support_material_spacing = 1.5
; support_material_speed = 50
; support_material_threshold = 40
; support_material_with_sheath = 0
; xy_size_compensation = 0
; bottom_solid_layers = 2
; bridge_flow_ratio = 0.95
; bridge_speed = 20
; ensure_vertical_shell_thickness = 1
; external_fill_pattern = rectilinear
; external_perimeter_extrusion_width = 1
; external_perimeter_speed = 50
; external_perimeters_first = 0
; extra_perimeters = 0
; fill_angle = 45
; fill_density = 5%
; fill_pattern = rectilinear
; gap_fill_speed = 40
; infill_every_layers = 1
; infill_extruder = 1
; infill_extrusion_width = 1
; infill_overlap = 25%
; infill_speed = 50
; overhangs = 0
; perimeter_extruder = 1
; perimeter_extrusion_width = 0.94
; perimeter_speed = 50
; perimeters = 2
; small_perimeter_speed = 40
; solid_infill_below_area = 0
; solid_infill_every_layers = 0
; solid_infill_extruder = 1
; solid_infill_extrusion_width = 1
; solid_infill_speed = 50
; thin_walls = 0
; top_infill_extrusion_width = 0.95
; top_solid_infill_speed = 50
; top_solid_layers = 2


Re: Dialed in at one layer height but not another

Re: Dialed in at one layer height but not another

OK. i tried at higher temps (222) did same thing. got to looking at the model and it has a gradual slope to the front of the object and with the 0.5 and 0.6mm jumps it was leaving a big gap that wasn't able to be bridged.

I'm hoping that was the problem. I dropped the first few layers down to a reasonable 0.3 height and now I'm reprinting the curved portion at 0.3 and the remainder at 0.6

I'll update as it plays out.

In the meantime I printed a 25x25 block at 0.5 with 5% infill and it printed great so I think it's the model

Re: Dialed in at one layer height but not another

Glad it's working but I think a 0.8 nozzle may be pushing too far past the limitations imposed by the standard E3D hotend. Anything over 0.6 and I would look into the Volcano hotend as it has a much longer heated block to push filament through.

Re: Dialed in at one layer height but not another

Good to know. I'm printing a larger object so I figured it would be a good time to try and troubleshoot the 0.8, I'm looking to confirm shape and dimensions it's far from a final output so I figured if I could shave a few hours off the print by pushing it through the 0.8 it might be worth it.

I've got a 0.6 as well. I could play with later.
I don't have any detailed items yet to justify hooking up my 0.15 or 0.25 nozzles yet.

Re: Dialed in at one layer height but not another

Hi Pedaldoc,
Is it possible to print the first few layers at a lower layer height to get over the slope then switch to a greater layer height for the rest of the build. I do something like this for larger builds although I dont use the 0.8 nozzle... my need is for higher density fill at the top and bottom of the print.

regards joan

Re: Dialed in at one layer height but not another

that is exactly what I did.

here's the instructions. pretty easy to do

http://manual.slic3r.org/expert-mode/variable-layer-height