Topics created by MRob

@droftarts Understood, optoisolation still a good idea, I'll see about building it in!

@oliof said in Gcode lines per second?:

@mrob just to add, simulation is about 5 to 20 times faster than actual printing...

I find it about 60 times faster than actual printing. It depends on how fast you print.

@t3p3tony Ah OK, so could be around 6 months then, I'll go UCCNC in the meanwhile.

Upgraded firmware to latest, so 2.05. Using Prusa slic3r. Gcode, same issue with many models but copied are the start and end portions of one I tried:

; generated by PrusaSlicer 2.1.0+win64 on 2019-12-01 at 18:13:35 UTC

;

; external perimeters extrusion width = 0.60mm
; perimeters extrusion width = 0.60mm
; infill extrusion width = 0.68mm
; solid infill extrusion width = 0.68mm
; top infill extrusion width = 0.68mm
; support material extrusion width = 0.52mm
; first layer extrusion width = 0.63mm

M107
M190 S85 ; set bed temperature and wait for it to be reached
M104 S240 ; set temperature
G28 ; home all axes

G1 Z2 F8000 ; lift nozzle
G1 X150 Y10
M109 S240 ; set temperature and wait for it to be reached
G21 ; set units to millimeters
G90 ; use absolute coordinates
M82 ; use absolute distances for extrusion
G92 E0

; Filament-specific end gcode
;END gcode for filament
M104 S0; Set Hot-end to 0C (off)
;M140 S0; Set bed to 0C (off)

G91
G1 F1800 E-2
G1 F5000 E-3 Z5
G90

G28 X0 ; home X axis
M84 ; disable motors
; filament used [mm] = 3032.0
; filament used [cm3] = 7.3
; filament used [g] = 7.3
; filament cost = 0.1
; total filament used [g] = 7.3
; total filament cost = 0.1
; estimated printing time (normal mode) = 2h 10m 7s

; avoid_crossing_perimeters = 0
; bed_custom_model =
; bed_custom_texture =
; bed_shape = 0x0,280x0,280x300,0x300
; bed_temperature = 85
; before_layer_gcode =
; between_objects_gcode =
; bottom_fill_pattern = rectilinear
; bottom_solid_layers = 4
; bridge_acceleration = 0
; bridge_angle = 0
; bridge_fan_speed = 100
; bridge_flow_ratio = 0.9
; bridge_speed = 10
; brim_width = 5
; clip_multipart_objects = 0
; complete_objects = 0
; cooling = 1
; cooling_tube_length = 5
; cooling_tube_retraction = 91.5
; default_acceleration = 0
; default_filament_profile = ""
; default_print_profile =
; deretract_speed = 0
; disable_fan_first_layers = 2
; dont_support_bridges = 1
; duplicate_distance = 6
; elefant_foot_compensation = 0
; end_filament_gcode = "; Filament-specific end gcode \n;END gcode for filament\n"
; end_gcode = M104 S0; Set Hot-end to 0C (off)\n;M140 S0; Set bed to 0C (off)\n\nG91\nG1 F1800 E-2\nG1 F5000 E-3 Z5\nG90\n\nG28 X0 ; home X axis\nM84 ; disable motors\n
; ensure_vertical_shell_thickness = 0
; external_perimeter_extrusion_width = 0.6
; external_perimeter_speed = 30
; external_perimeters_first = 0
; extra_loading_move = -2
; extra_perimeters = 1
; extruder_clearance_height = 20
; extruder_clearance_radius = 20
; extruder_colour = ""
; extruder_offset = 0x0
; extrusion_axis = E
; extrusion_multiplier = 1
; extrusion_width = 0.6
; fan_always_on = 0
; fan_below_layer_time = 60
; filament_colour = #29B2B2
; filament_cooling_final_speed = 3.4
; filament_cooling_initial_speed = 2.2
; filament_cooling_moves = 4
; filament_cost = 11
; filament_density = 1
; filament_diameter = 1.75
; filament_load_time = 0
; filament_loading_speed = 28
; filament_loading_speed_start = 3
; filament_max_volumetric_speed = 0
; filament_minimal_purge_on_wipe_tower = 15
; filament_notes = ""
; filament_ramming_parameters = "120 100 6.6 6.8 7.2 7.6 7.9 8.2 8.7 9.4 9.9 10.0| 0.05 6.6 0.45 6.8 0.95 7.8 1.45 8.3 1.95 9.7 2.45 10 2.95 7.6 3.45 7.6 3.95 7.6 4.45 7.6 4.95 7.6"
; filament_settings_id = ApolloX
; filament_soluble = 0
; filament_toolchange_delay = 0
; filament_type = ABS
; filament_unload_time = 0
; filament_unloading_speed = 90
; filament_unloading_speed_start = 100
; fill_angle = 0
; fill_density = 15%
; fill_pattern = triangles
; first_layer_acceleration = 0
; first_layer_bed_temperature = 85
; first_layer_extrusion_width = 0.63
; first_layer_height = 0.22
; first_layer_speed = 10
; first_layer_temperature = 240
; gap_fill_speed = 30
; gcode_comments = 0
; gcode_flavor = reprap
; gcode_label_objects = 0
; high_current_on_filament_swap = 0
; host_type = duet
; infill_acceleration = 0
; infill_every_layers = 1
; infill_extruder = 1
; infill_extrusion_width = 0.68
; infill_first = 0
; infill_only_where_needed = 0
; infill_overlap = 0%
; infill_speed = 60
; interface_shells = 0
; layer_gcode =
; layer_height = 0.16
; machine_max_acceleration_e = 10000,5000
; machine_max_acceleration_extruding = 1500,1250
; machine_max_acceleration_retracting = 1500,1250
; machine_max_acceleration_x = 9000,1000
; machine_max_acceleration_y = 9000,1000
; machine_max_acceleration_z = 500,200
; machine_max_feedrate_e = 120,120
; machine_max_feedrate_x = 500,200
; machine_max_feedrate_y = 500,200
; machine_max_feedrate_z = 12,12
; machine_max_jerk_e = 2.5,2.5
; machine_max_jerk_x = 10,10
; machine_max_jerk_y = 10,10
; machine_max_jerk_z = 0.2,0.4
; machine_min_extruding_rate = 0,0
; machine_min_travel_rate = 0,0
; max_fan_speed = 30
; max_layer_height = 0
; max_print_height = 400
; max_print_speed = 80
; max_volumetric_speed = 0
; min_fan_speed = 15
; min_layer_height = 0.07
; min_print_speed = 5
; min_skirt_length = 0
; notes =
; nozzle_diameter = 0.6
; only_retract_when_crossing_perimeters = 0
; ooze_prevention = 0
; output_filename_format = [input_filename_base].gcode
; overhangs = 1
; parking_pos_retraction = 92
; perimeter_acceleration = 0
; perimeter_extruder = 1
; perimeter_extrusion_width = 0.6
; perimeter_speed = 60
; perimeters = 3
; post_process =
; print_host = 192.168.1.24
; print_settings_id = ABS
; printer_model =
; printer_notes =
; printer_settings_id = D9
; printer_technology = FFF
; printer_variant =
; printer_vendor =
; printhost_apikey =
; printhost_cafile =
; raft_layers = 0
; remaining_times = 0
; resolution = 0
; retract_before_travel = 2
; retract_before_wipe = 0%
; retract_layer_change = 1
; retract_length = 3.5
; retract_length_toolchange = 10
; retract_lift = 0
; retract_lift_above = 0
; retract_lift_below = 0
; retract_restart_extra = 0
; retract_restart_extra_toolchange = 0
; retract_speed = 100
; seam_position = aligned
; serial_port =
; serial_speed = 250000
; silent_mode = 1
; single_extruder_multi_material = 0
; single_extruder_multi_material_priming = 1
; skirt_distance = 2
; skirt_height = 1
; skirts = 2
; slice_closing_radius = 0.049
; slowdown_below_layer_time = 20
; small_perimeter_speed = 30
; solid_infill_below_area = 70
; solid_infill_every_layers = 0
; solid_infill_extruder = 1
; solid_infill_extrusion_width = 0.68
; solid_infill_speed = 50
; spiral_vase = 0
; standby_temperature_delta = -5
; start_filament_gcode = "; Filament gcode\n"
; start_gcode = G28 ; home all axes\n;G29 homing?\n\nG1 Z2 F8000 ; lift nozzle\nG1 X150 Y10\n
; support_material = 1
; support_material_angle = 0
; support_material_auto = 0
; support_material_buildplate_only = 0
; support_material_contact_distance = 0.2
; support_material_enforce_layers = 0
; support_material_extruder = 1
; support_material_extrusion_width = 0.52
; support_material_interface_contact_loops = 0
; support_material_interface_extruder = 1
; support_material_interface_layers = 1
; support_material_interface_spacing = 0
; support_material_interface_speed = 100%
; support_material_pattern = rectilinear
; support_material_spacing = 5
; support_material_speed = 60
; support_material_synchronize_layers = 0
; support_material_threshold = 0
; support_material_with_sheath = 1
; support_material_xy_spacing = 50%
; temperature = 240
; thin_walls = 1
; threads = 4
; toolchange_gcode =
; top_fill_pattern = rectilinear
; top_infill_extrusion_width = 0.68
; top_solid_infill_speed = 30
; top_solid_layers = 4
; travel_speed = 150
; use_firmware_retraction = 0
; use_relative_e_distances = 0
; use_volumetric_e = 0
; variable_layer_height = 1
; wipe = 1
; wipe_into_infill = 0
; wipe_into_objects = 0
; wipe_tower = 0
; wipe_tower_bridging = 10
; wipe_tower_rotation_angle = 0
; wipe_tower_width = 60
; wipe_tower_x = 180
; wipe_tower_y = 140
; wiping_volumes_extruders = 70,70
; wiping_volumes_matrix = 0
; xy_size_compensation = 0
; z_offset = 0

Thanks, good to know - although I'm not sure it would work with a 4 pin, as the control circuit probably wants a certain voltage to function? But thinking more about 3 pin cpu fans, I think it should be good. I just bought one to test, at 400ma it pretty much has to be speed controllable, but also the laptop needs to know RPM to monitor for fault. So third wire must be tacho, therefore it "should" be PWM control like standard 5015 fans. If I can get it to work consistently, then it really is an excellent solution. Previous one (280mA) was seriously powerful before the control circuit kicked in, and they are not even expensive.