Extrusion problem with volumetric firmware #2792
Comments
|
Is your firmware configured to use volumetric extrusion by default? I don't see any |
|
As far as I know it is. |
|
Ultigcode mode, which is where a UM2 uses volumetric extrusion and firmware retraction from settings stored in EEPROM, needs to be triggered by special comments in the start code. You need to have a line that says ";FLAVOR:UltiGCode", and I believe there are a few other lines that would otherwise be considered comments that a UM2 interprets in this mode. This also means that you need to send the gcode using something that won't strip comments. |
|
@Alex9779, comparisons are not helping much. Let's check whether the G-code produced by Slic3r is correct or not, regardless of other software. Can you paste the first, say, 50 lines of a G-code file? We can easily calculate whether the volumetric values are reasonable or not. |
|
@whosawhatsis Sorry to say but I am not a full noob in this. I know that Ultimkaer CAN use UltiGcode but does not have to. I am successfully printing with normal Gcode generated by Simplify3D, my own start and end sequence even if I start from SD card and also after a Cura sliced model with UltiGcode was printed, so my start and end sequence seem to be pretty decent. @alexrj I will create the test again, and post what you requested... I am really not sure if this is my problem of understanding, but it was quite easy for me to get good results with S3D so I thought those settings might work for others too, but they do not work with slic3r. Only when is use an extrusion multiplier of 0.1. From what I know a lot of things are set in the Ultimaker 2 firmware, as the filament diameter and retraction and if I do not set them explicitly with a command they should be used as default. So I do not see any sense in setting the diameter with an M200 again, the E values slic3r calculates stay the same and the print is still over extruded... |
|
|
OK seems I was totally wrong... Sorry for bothering... |
|
@Alex9779 what was the error? |
|
I have to verify first but @whosawhatsis comment made me think again and I think my assumption was wrong: when I use normal gcode and not UltiGcode nothing from the firmware settings is used. S3D does not have a volumetric mode. I do not find any hint searching the web on that but it seems it only uses the normal feed mode. When I slice the model again with slic3r and volumetric setting off the extrusion values are reasonable again. Think that is the problem when using such a "user friendly" printer, if you wanna use something different than what is meant to be used (Cura) you have to read more than if you would do it with the normal hard learning curve... |
Hello,
I recently started using slic3r, after giving Cura its chance and configuring Simply3D to print good results on my printer, to have more options on complex parts.
Though I am having trouble with the initial settings to get a simple print correctly.
After doing some test prints I realised that my extruder constantly maxes out and the firmware retracts a bit so I compared the gcode of the same part in those three softwares and I saw that the extraction of slic3r is way too much than the others.
Here are my settings:
´´´
; avoid_crossing_perimeters = 1
; bed_shape = 0x0,230x0,230x215,0x215
; bed_temperature = 60
; before_layer_gcode =
; bridge_acceleration = 0
; bridge_fan_speed = 100
; brim_width = 0
; complete_objects = 0
; cooling = 1
; default_acceleration = 0
; disable_fan_first_layers = 1
; duplicate_distance = 6
; end_gcode = ;End G-code\nG91 ; relative coordinates\nG1 Z0.2 ; retract lift\nG1 E-20 F3000 ; reverse priming\nG90 ; absolute coordinates\nG28 ; home all axes\nM104 S0 ; turn off extruder heaters\nM140 S0 ; turn off bed heater\nM84 ; disable motors
; extruder_clearance_height = 20
; extruder_clearance_radius = 20
; extruder_offset = 0x0
; extrusion_axis = E
; extrusion_multiplier = 1
; fan_always_on = 1
; fan_below_layer_time = 60
; filament_diameter = 2.85
; first_layer_acceleration = 0
; first_layer_bed_temperature = 60
; first_layer_extrusion_width = 125%
; first_layer_speed = 60%
; first_layer_temperature = 210
; gcode_arcs = 0
; gcode_comments = 0
; gcode_flavor = reprap
; infill_acceleration = 0
; infill_first = 0
; layer_gcode =
; max_fan_speed = 100
; min_fan_speed = 80
; min_print_speed = 10
; min_skirt_length = 0
; notes =
; nozzle_diameter = 0.4
; only_retract_when_crossing_perimeters = 1
; ooze_prevention = 0
; output_filename_format = [input_filename_base].gcode
; perimeter_acceleration = 0
; post_process =
; pressure_advance = 0
; resolution = 0
; retract_before_travel = 2
; retract_layer_change = 0
; retract_length = 2
; retract_length_toolchange = 10
; retract_lift = 0.05
; retract_restart_extra = 0
; retract_restart_extra_toolchange = 0
; retract_speed = 40
; skirt_distance = 6
; skirt_height = 1
; skirts = 1
; slowdown_below_layer_time = 15
; spiral_vase = 0
; standby_temperature_delta = -5
; start_gcode = G28 ; home all axes\nG1 F12000 X5 Y10 ; Cura HEATUP_POSITION_COMMAND\nM190 S[first_layer_bed_temperature] ; wait for bed temperature to be reached\nM109 S[first_layer_temperature] ; wait for temperature to be reached\nG1 F2400 Z20 ; bring plate to Cura PRIMING_HEIGTH with Cura HOMING_FEEDRATE\nG92 E0 ; zero the extruded length\nG1 F500 E20 ; undo end of print/abort retraction\nG92 E0 ; zero the extruded length\nG1 F50 E5 ; additional priming\nG1 F2400 X20 Y20 Z0.3 ; wipe start position\nG92 E0 ; zero the extruded length\nG1 F225 X35 E2 ; move 15mm and extrude\nG92 E0 ; zero the extruded length\nG1 F2100 X50 E1 ; move 15mm\nG92 E0 ; zero the extruded length
; temperature = 210
; threads = 2
; toolchange_gcode =
; travel_speed = 130
; use_firmware_retraction = 1
; use_relative_e_distances = 0
; use_volumetric_e = 1
; vibration_limit = 0
; wipe = 0
; z_offset = 0
; dont_support_bridges = 1
; extrusion_width = 0.4
; first_layer_height = 0.2
; infill_only_where_needed = 0
; interface_shells = 0
; layer_height = 0.1
; raft_layers = 0
; seam_position = random
; 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 = 0
; support_material_interface_speed = 100%
; support_material_pattern = pillars
; support_material_spacing = 2.5
; support_material_speed = 60
; support_material_threshold = 0
; xy_size_compensation = 0
; bottom_solid_layers = 6
; bridge_flow_ratio = 2
; bridge_speed = 25
; external_fill_pattern = rectilinear
; external_perimeter_extrusion_width = 0
; external_perimeter_speed = 50%
; external_perimeters_first = 0
; extra_perimeters = 1
; fill_angle = 45
; fill_density = 50%
; fill_pattern = rectilinear
; gap_fill_speed = 20
; infill_every_layers = 1
; infill_extruder = 1
; infill_extrusion_width = 0
; infill_overlap = 60%
; infill_speed = 75
; overhangs = 1
; perimeter_extruder = 1
; perimeter_extrusion_width = 0
; perimeter_speed = 50
; perimeters = 2
; small_perimeter_speed = 30%
; solid_infill_below_area = 10
; solid_infill_every_layers = 0
; solid_infill_extruder = 1
; solid_infill_extrusion_width = 0
; solid_infill_speed = 40%
; thin_walls = 1
; top_infill_extrusion_width = 0
; top_solid_infill_speed = 30%
; top_solid_layers = 6
´´´
Maybe there is some calculation error when calculation E rate for volumetric extrusion? Because I have to set my extrusion multiplier to ~0.1 to get reasonable results and that is way off the normal values 0.9-1.1... it is a tenth!
I am on 1.2.6, Windows 7.
Regards,
Alexander
The text was updated successfully, but these errors were encountered: