<![CDATA[SoliForum - 3D Printing Community — Hot end heats to temp then starts dropping]]> 2015-04-02T03:51:28Z PunBB https://www.soliforum.com/topic/10637/hot-end-heats-to-temp-then-starts-dropping/ <![CDATA[Re: Hot end heats to temp then starts dropping]]> SD4

]]> https://www.soliforum.com/user/2291/ 2015-04-02T03:51:28Z https://www.soliforum.com/post/91740/#p91740 <![CDATA[Re: Hot end heats to temp then starts dropping]]> What printer?

]]> https://www.soliforum.com/user/221/ 2015-04-02T03:38:47Z https://www.soliforum.com/post/91739/#p91739 <![CDATA[Re: Hot end heats to temp then starts dropping]]> Before you get too excited do a PID auto tune,  the instructions can be found in the WIKI.  SD printers are famous for poor thermistor placement so they read lower than the actual temperature at the nozzle.  If you are truly experiencing layer separation due to low temperatures, you may find yourself upgrading the hot end.  That isn't all bad as switch to an all metal hotend like the E3d is one of the best upgrades you can do.  There's a lot of information available and plenty of people to help.  I hear what your saying though, it should as it is.

]]> https://www.soliforum.com/user/2291/ 2015-04-02T02:55:26Z https://www.soliforum.com/post/91731/#p91731 <![CDATA[Re: Hot end heats to temp then starts dropping]]> Yes, it was in fact a MAX TEMP issue. At 220 degrees I got two successful prints. My question now is, I was under the impression that ABS printed best between 230-240. I have seen at 220, my bottom layers do not lay down very well. I am running at 40mm speed now. I am guessing this means I am going to have run even slower. Is this another reason to look into replacing the hot end? I hate to do that with a machine I just bought. I want to see it run as intended before I start making a bunch of changes. To this point, my experience hasn't been all bad. I was very impressed with the results at .2mm resolution. Better than some other, more expensive, printers I have used.

]]> https://www.soliforum.com/user/9095/ 2015-04-02T02:04:40Z https://www.soliforum.com/post/91720/#p91720 <![CDATA[Re: Hot end heats to temp then starts dropping]]> elmoret wrote:

Look in the log, I bet there's a MAXTEMP error or similar.

+1 you are hitting MAX TEMP and it is shutting it off to protect your hot end.  If you aren't able to extrude at 220 you could try doing a PID auto tune.

]]> https://www.soliforum.com/user/2291/ 2015-04-02T00:13:47Z https://www.soliforum.com/post/91708/#p91708 <![CDATA[Re: Hot end heats to temp then starts dropping]]> Look in the log, I bet there's a MAXTEMP error or similar.

]]> https://www.soliforum.com/user/221/ 2015-04-01T23:24:04Z https://www.soliforum.com/post/91706/#p91706 <![CDATA[Re: Hot end heats to temp then starts dropping]]> the ..... are where I removed the g-code in the middle.  The M104 should be in the end code when it is finished printing.

]]> https://www.soliforum.com/user/9095/ 2015-04-01T23:16:54Z https://www.soliforum.com/post/91704/#p91704 <![CDATA[Re: Hot end heats to temp then starts dropping]]> The M104 command after the ..... is telling it to turn the hot end off. Try taking that line out and run it.

]]> https://www.soliforum.com/user/7731/ 2015-04-01T23:05:18Z https://www.soliforum.com/post/91703/#p91703 <![CDATA[Hot end heats to temp then starts dropping]]> My first print completed. It was 20mm cube, but it stopped at about 4-5mm and told me it was done.

Since then, whenever I get hot enough to print, the temperature starts coming down. Sometimes it will tell me the print is done, and sometimes still say heating extruder or ETA to finish.

It happens if I preheat the extruder manually and wait for it to get to temperature then start printing or if I hit print and let it heat up automatically.

I have used two different models and used Slic3r and Cura with Repetier Host. I am still getting the same problem. My filament was not flowing very well at 220 degrees, so I am setting it to 230. Here is my latest g-code. They are all roughly similar.

I tried copying my temperature curve. Didn't cooperate. Essential it shows going up to temperature and then coming down in a nice peak and smooth curve.

; generated by Slic3r 1.1.7 on 2015-04-01 at 17:43:10

; perimeters extrusion width = 0.40mm
; infill extrusion width = 0.67mm
; solid infill extrusion width = 0.67mm
; top infill extrusion width = 0.67mm

G21 ; set units to millimeters
M107
M190 S70 ; wait for bed temperature to be reached
M104 S220 ; set temperature
G28 ; home all axes
G1 Z5 F5000 ; lift nozzle
M109 S220 ; wait for temperature to be reached
G90 ; use absolute coordinates
G92 E0
M82 ; use absolute distances for extrusion
G1 F3000.000 E-2.00000
G92 E0

......


G1 F3000.000 E5.10477
G92 E0
M107
M104 S0 ; turn off temperature
G28 X0  ; home X axis
M84     ; disable motors
; filament used = 636.5mm (1.5cm3)

; avoid_crossing_perimeters = 0
; bed_size = 200,200
; bed_temperature = 85
; bridge_acceleration = 0
; bridge_fan_speed = 100
; bridge_flow_ratio = 1
; brim_width = 0.8
; complete_objects = 0
; cooling = 1
; default_acceleration = 0
; disable_fan_first_layers = 1
; duplicate_distance = 6
; end_gcode = M104 S0 ; turn off temperature\nG28 X0  ; home X axis\nM84     ; disable motors
; external_perimeters_first = 0
; extruder_clearance_height = 20
; extruder_clearance_radius = 20
; extruder_offset = 0x0
; extrusion_axis = E
; extrusion_multiplier = 1
; fan_always_on = 0
; fan_below_layer_time = 60
; filament_diameter = 1.75
; first_layer_acceleration = 0
; first_layer_bed_temperature = 70
; first_layer_extrusion_width = 200%
; first_layer_speed = 30%
; first_layer_temperature = 220
; g0 = 0
; gcode_arcs = 0
; gcode_comments = 0
; gcode_flavor = reprap
; infill_acceleration = 0
; infill_first = 0
; layer_gcode =
; max_fan_speed = 100
; min_fan_speed = 35
; 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 =
; print_center = 98,93
; resolution = 0
; retract_before_travel = 2
; retract_layer_change = 1
; retract_length = 2
; retract_length_toolchange = 2.5
; retract_lift = 0
; retract_restart_extra = 0
; retract_restart_extra_toolchange = 0
; retract_speed = 50
; skirt_distance = 6
; skirt_height = 1
; skirts = 2
; slowdown_below_layer_time = 30
; spiral_vase = 0
; standby_temperature_delta = -5
; start_gcode = G28 ; home all axes\nG1 Z5 F5000 ; lift nozzle
; temperature = 220
; threads = 2
; toolchange_gcode =
; travel_speed = 150
; use_firmware_retraction = 0
; use_relative_e_distances = 0
; vibration_limit = 0
; wipe = 0
; z_offset = 0
; dont_support_bridges = 1
; extrusion_width = 0
; first_layer_height = 0.3
; infill_only_where_needed = 0
; interface_shells = 0
; layer_height = 0.2
; raft_layers = 0
; seam_position = aligned
; support_material = 0
; support_material_angle = 0
; 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
; bottom_solid_layers = 3
; bridge_speed = 60
; external_perimeter_speed = 70%
; extra_perimeters = 1
; fill_angle = 45
; fill_density = 0%
; fill_pattern = rectilinear
; gap_fill_speed = 20
; infill_every_layers = 1
; infill_extruder = 1
; infill_extrusion_width = 0
; infill_speed = 60
; overhangs = 1
; perimeter_extruder = 1
; perimeter_extrusion_width = 0
; perimeter_speed = 60
; perimeters = 2
; small_perimeter_speed = 30
; solid_fill_pattern = rectilinear
; solid_infill_below_area = 70
; solid_infill_every_layers = 0
; solid_infill_extrusion_width = 0
; solid_infill_speed = 60
; thin_walls = 1
; top_infill_extrusion_width = 0
; top_solid_infill_speed = 50
; top_solid_layers = 0

]]> https://www.soliforum.com/user/9095/ 2015-04-01T22:49:28Z https://www.soliforum.com/post/91700/#p91700