Need help calibrating filament loads/unloads | ArmoredTurtle 3D | Page 1

left cobalt Feb 16, 2026, 11:53 PM

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Every time my filament unloads it gets stuck in the toolhead for some reason.

mystic abyssBOT Feb 16, 2026, 11:54 PM

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Please run this debugging script when not printing and post the resulting link in chat.

Troubleshooting - Armored Turtle Documentation

Armored Turtle Project Documentation

last crow Feb 16, 2026, 11:54 PM

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What hotend does that use?

left cobalt Feb 16, 2026, 11:57 PM

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last crow What hotend does that use?

Proprietary https://us.qidi3d.com/products/plus4-bimetal-hot-end

QIDI US Store

Plus4 Bimetal Nozzle hotend

Print precisely with the Plus4 Bimetal Nozzle Hotend, designed to minimize clogging and enhance 3D printing performance.

last crow Feb 16, 2026, 11:58 PM

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So basically a Bambu hotend though

left cobalt Feb 16, 2026, 11:59 PM

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Probably

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seems similar

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https://termbin.com/fmi2

last crow Feb 17, 2026, 12:12 AM

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Well for starters I would set pushback to 8 which is 2 less than your retract so it still shouldn’t cause oozing

left cobalt Feb 17, 2026, 12:13 AM

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its currently 0 right?

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trying to find where its set

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found it

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I set it to 8

last crow Feb 17, 2026, 12:17 AM

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Try that but make sure you’re purging on a tool change

left cobalt Feb 17, 2026, 12:17 AM

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im still trying to hunt down why it sits at the front left instead of parking

last crow Feb 17, 2026, 12:18 AM

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When?

left cobalt Feb 17, 2026, 12:18 AM

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When loading

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it sits at the front left, loads, then moves to the chute

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instead of just..moving to the chute THEN loading/purging

last crow Feb 17, 2026, 12:19 AM

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What command are you using?

left cobalt Feb 17, 2026, 12:19 AM

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Its when actually printing

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not manual loading

last crow Feb 17, 2026, 12:20 AM

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Oh well that’s even weirder

left cobalt Feb 17, 2026, 12:22 AM

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I think you previously found why it was doing it but i cant find my old thread

last crow Feb 17, 2026, 12:22 AM

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I can take a closer look when I get home

left cobalt Feb 17, 2026, 12:22 AM

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attempting a load

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well..had 5 successful loads/unloads back to back. gonna try a print.

left cobalt Feb 17, 2026, 12:48 AM

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I think I found where its doing it in my print_start after the G29

[gcode_macro PRINT_START]
gcode:
    {% set bedtemp = params.BED|int %}
    {% set hotendtemp = params.HOTEND|int %}
    {% set chambertemp = params.CHAMBER|default(0)|int %}

    SET_GCODE_VARIABLE MACRO=_APPLY_NOZZLE_OFFSET VARIABLE=hotend_temp VALUE={hotendtemp}

    M104 S0 #Set hotend to 0
    M106 P2 S0 #Set fans to 0
    M106 P3 S0 #Set fans to 0
    M106 S255 #Set fans to 255
    G28 #Home
    M141 S{chambertemp} #Set chamber temp
    M140 S{bedtemp} #Set bed temp
    M106 S0 #Set hotend to 0

    #CLEAR_NOZZLE HOTEND={hotendtemp} PEI_WIPE=1 PURGE=0 #Clear nozzle
    
    M191 S{chambertemp}   
    M190 S{bedtemp}   
    M104 S140
    RESPOND PREFIX="INFO" MSG="PRINT_START sees HOTEND = {hotendtemp}"
    G29
    G0 Z50 F600
    G0 X5 Y5  F6000
    {% if chambertemp == 0 %}
        M106 P3 S255
    {% endif %}
    M109 S{hotendtemp}
    M141 S{chambertemp}    
    M204 S10000
    SET_PRINT_STATS_INFO CURRENT_LAYER=1

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G0 X5 Y5

last crow Feb 17, 2026, 12:50 AM

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You don’t actually load sitting your print start which seems odd

left cobalt Feb 17, 2026, 12:52 AM

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It loaded but the extruder keeps clicking. It should be able to handle 12mm/s during printing but idk. Weird.

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heres my machine start gcode

PRINT_START BED=[first_layer_bed_temperature] HOTEND=[first_layer_temperature] CHAMBER=[chamber_temperature]
SET_PRINT_STATS_INFO TOTAL_LAYER={total_layer_count} ; For pause at layer functionality and better print stats

T{initial_tool}

; adapative purge line
G1 X{first_layer_print_min[0]-10} Y{first_layer_print_min[1]} Z0.8 F6000.0 ; position 10mm left from the lower left of the first layer
G1 X{first_layer_print_min[0]-10} Y{first_layer_print_min[1]+30} E30 F360.0 ; extrude 30mm of filament in the y direction
G92 E0.0 ; reset extruder
G1 E-0.5 F2100 ; small retraction
G1 Y{first_layer_print_min[1]+40} F6000.0 ; move an additional 10mm without extruding
G92 E0.0 ; reset extruder

last crow Feb 17, 2026, 12:55 AM

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Ahh you just have way more than I would expect on slicer side

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What is clicking? Since it looks like your print is working ok

left cobalt Feb 17, 2026, 12:57 AM

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Extruder skipping for some reason

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rn_image_picker_lib_temp_1c7a131a-c746-4548-bdf7-8fc12a93c76f.jpg

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Ughhhh

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Print ended, filament rewound no issue. Homed the printer and this piece of filament just randomly appeared it seems and is triggering the sensor

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rn_image_picker_lib_temp_e1dee487-653c-411c-b02c-24a4d9409906.jpg

last crow Feb 17, 2026, 1:00 AM

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looks like your cut isn't working right then

left cobalt Feb 17, 2026, 1:01 AM

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I think this is the cut piece

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since the end is nozzle shaped

last crow Feb 17, 2026, 1:02 AM

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the piece that should have stayed in the hotend yes

left cobalt Feb 17, 2026, 1:02 AM

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well yeah i suppose

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should i do another print?

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100x100x0.2

last crow Feb 17, 2026, 1:03 AM

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I'd check your turtleneck switches are working

left cobalt Feb 17, 2026, 1:03 AM

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mmmm..they arent.

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it says buffer not active whether i pull it our or push it in.

last crow Feb 17, 2026, 1:04 AM

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which is true if there isn't a lane loaded, just look under MISC tab in mainsail

left cobalt Feb 17, 2026, 1:04 AM

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oh

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https://i.imgur.com/KcEXx3n.png ok yep

Imgur

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if i trigger the switches the yellows turn green

last crow Feb 17, 2026, 1:05 AM

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in the correct conditions?

left cobalt Feb 17, 2026, 1:05 AM

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yes

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if i pull it out, expanded triggers, push it in compressed triggers

last crow Feb 17, 2026, 1:08 AM

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ok thats good, what filament is this

left cobalt Feb 17, 2026, 1:08 AM

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Tinmorry PETG-GF

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https://www.amazon.com/dp/B0D45BQGSC

TINMORRY Glass Fiber Reinforced PETG Filament 1.75mm, High Impact R...

Glass Fiber Reinforced PETG Filament 1.75mm, High Impact Resistance PETG GF 3D Printing Filament, Durability & Stiffness, Compatible with Bambu Lab FDM 3D Printer, 1 KG 1 Spool, Frosted Black

last crow Feb 17, 2026, 1:28 AM

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what firmware are you on for everythign?

left cobalt Feb 17, 2026, 1:31 AM

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Everything? Like...beacon, nebula cam..everything?

last crow Feb 17, 2026, 1:32 AM

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I mean cameras don't matter but all of the MCUs

left cobalt Feb 17, 2026, 1:39 AM

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Everythings on the latest, I just installed klipper on everything like a week ago

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https://i.imgur.com/6NcwzHj.png

Imgur

last crow Feb 17, 2026, 1:50 AM

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thats not firmware

left cobalt Feb 17, 2026, 1:56 AM

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its updated trust me

last crow Feb 17, 2026, 1:56 AM

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show me? its not hard

left cobalt Feb 17, 2026, 1:59 AM

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Not sure how to check lmao

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let me try figuring it out

last crow Feb 17, 2026, 2:08 AM

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its listed right above where you took that screenshot

left cobalt Feb 17, 2026, 2:10 AM

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https://i.imgur.com/Dzwpwiy.png

Imgur

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this what u wanted

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rn_image_picker_lib_temp_c14f14f1-7d03-4cab-b46c-8871503b95df.jpg

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Did the same thing this time

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rn_image_picker_lib_temp_9557a452-bd84-400a-86f2-4ba6871527be.jpg

last crow Feb 17, 2026, 2:16 AM

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see the version # there? thats firmware.
and seeing how a few are several hundred commits behind I am going to suggest getting them updated to eliminate any issues for mismatch potential

left cobalt Feb 17, 2026, 2:16 AM

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I worry that updating will brick something..

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you think simply being outdated would cause filament to retract back into the extruder? seems a lil far fetched,..

last crow Feb 17, 2026, 2:19 AM

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no but we have seen weird extrusion rate things when firmware is old. IDK what klipper might have done with clock speeds recently but I know they have messed with H7 series and GB01

left cobalt Feb 17, 2026, 2:19 AM

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So...I gotta figure out how to update these without bricking shit

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https://termbin.com/cksn heres my latest

last crow Feb 17, 2026, 2:26 AM

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why is rip_length not set to 1 like is default?

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under cut variables

left cobalt Feb 17, 2026, 2:26 AM

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my best guess is we changed it to that during previous troubleshooting

last crow Feb 17, 2026, 2:27 AM

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IDK why we ever would have

left cobalt Feb 17, 2026, 2:27 AM

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"we" meaning me and someone else in the discord, maybe not u

last crow Feb 17, 2026, 2:27 AM

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I assume this is a proprietary cutter?

left cobalt Feb 17, 2026, 2:27 AM

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yup

last crow Feb 17, 2026, 2:29 AM

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and 285.5, 7.5 is nealry full stroke?

left cobalt Feb 17, 2026, 2:30 AM

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Yes

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Can't go any further forward or it might break the arm or toolhead

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last crow Feb 17, 2026, 2:32 AM

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any chance that the blade has moved on you?

left cobalt Feb 17, 2026, 2:33 AM

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it makes an audible cut every time and i retightened the blade today

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It is cutting the filament

last crow Feb 17, 2026, 2:34 AM

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I just can't think of a reason it would bull it back up except its hanging on by a hair

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hopefully someone else chimes in for you, its almost my bed time

left cobalt Feb 17, 2026, 2:35 AM

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wait let me check something rq

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Machine end gcode

TOOL_UNLOAD

M141 S0
M104 S0
M140 S0
G1 E-3 F1800
G0 Z{min(max_print_height, max_layer_z + 3)} F600
G0 X0 Y0 F12000
{if max_layer_z < max_print_height / 2}G1 Z{max_print_height / 2 + 10} F600{else}G1 Z{min(max_print_height, max_layer_z + 3)}{endif}

print end

[gcode_macro PRINT_END]
gcode:
    SET_IDLE_TIMEOUT TIMEOUT={printer.configfile.settings.idle_timeout.timeout}
    CLEAR_PAUSE
    M400
    G4 P5000
    M106 P2 S0
    M106 P0 S0
    M106 P3 S0
    
    M104 S0
    M140 S0
    M141 S0

    M220 S100
    M221 S100
    SET_STEPPER_ENABLE STEPPER=stepper_x enable=0
    SET_STEPPER_ENABLE STEPPER=stepper_y enable=0
    SET_STEPPER_ENABLE STEPPER=stepper_z enable=1
    SET_STEPPER_ENABLE STEPPER=stepper_z1 enable=1
    SET_STEPPER_ENABLE STEPPER=extruder enable=0
    
    DISABLE_ALL_SENSOR
    BED_MESH_CLEAR
    G31
    CLEAR_LAST_FILE
    M84
    BEEP I=2 DUR=500

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are any of those retracting

last crow Feb 17, 2026, 2:36 AM

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there is a 3mm retract in the machine end

left cobalt Feb 17, 2026, 2:36 AM

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3mm is TINY though

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I think they did that to reduce ooze

last crow Feb 17, 2026, 2:37 AM

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its after tool_unload so shouldn't even matter

left cobalt Feb 17, 2026, 2:37 AM

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its not triggering the error saying the tool failed to unload

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so i think its happening after unload..

last crow Feb 17, 2026, 2:38 AM

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is your cutter above your extruder gears?

left cobalt Feb 17, 2026, 2:38 AM

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yes

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last crow Feb 17, 2026, 2:40 AM

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ah well that makes sense then for the rip length
And I would recommend doing a small retract like 1mm before you unload and thats it.
IDK the dimensionals work there but 3mm could be enough to trigger that sensor

left cobalt Feb 17, 2026, 2:41 AM

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its pulling quite far up

last crow Feb 17, 2026, 2:42 AM

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might be a an issue with absolute vs relative mode I suppose

left cobalt Feb 17, 2026, 2:42 AM

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Sensor is bottom circle area, top line is where the filament is pulling up to

last crow Feb 17, 2026, 2:43 AM

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ok so its fine during print but fails print_end?

left cobalt Feb 17, 2026, 2:43 AM

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It seems to be that way yes. At print end, it retracts fine, doesnt complain, nothing

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but then I notice the sensor RE-triggers

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after it goes red, it goes back green, I look at theres filament

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let me do another single layer print and see if i can record what happens

last crow Feb 17, 2026, 2:44 AM

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try putting an M83 before the G1 E-3

left cobalt Feb 17, 2026, 2:45 AM

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[gcode_macro PRINT_START]
gcode:
    {% set bedtemp = params.BED|int %}
    {% set hotendtemp = params.HOTEND|int %}
    {% set chambertemp = params.CHAMBER|default(0)|int %}

    SET_GCODE_VARIABLE MACRO=_APPLY_NOZZLE_OFFSET VARIABLE=hotend_temp VALUE={hotendtemp}

    M104 S0 #Set hotend to 0
    M106 P2 S0 #Set fans to 0
    M106 P3 S0 #Set fans to 0
    M106 S255 #Set fans to 255
    G28 #Home
    M141 S{chambertemp} #Set chamber temp
    M140 S{bedtemp} #Set bed temp
    M106 S0 #Set hotend to 0

    #CLEAR_NOZZLE HOTEND={hotendtemp} PEI_WIPE=1 PURGE=0 #Clear nozzle
    
    M191 S{chambertemp}   
    M190 S{bedtemp}   
    M104 S140
    RESPOND PREFIX="INFO" MSG="PRINT_START sees HOTEND = {hotendtemp}"
    G29
    G0 Z50 F600
    #G0 X5 Y5  F6000
    AFC_PARK
    {% if chambertemp == 0 %}
        M106 P3 S255
    {% endif %}
    M109 S{hotendtemp}
    M141 S{chambertemp}    
    M204 S10000
    SET_PRINT_STATS_INFO CURRENT_LAYER=1

Side note I replaced the G0 X5 Y5 with AFC_PARK and that seems to make it go to the park position instead of the front left of the bed during print start.

last crow Feb 17, 2026, 2:45 AM

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that makes sense lol

left cobalt Feb 17, 2026, 2:46 AM

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just added the M83

last crow Feb 17, 2026, 2:48 AM

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that would ensure that the extrusion move is relative instead of it doing weird things and trying to undo the cut moves

left cobalt Feb 17, 2026, 2:48 AM

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I hope this fixes it

left cobalt Feb 17, 2026, 3:06 AM

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Wellll..it didnt do it this time I dont think..

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I dont see filament sticking up at least and the sensor isnt triggered

neon pebble Feb 17, 2026, 3:49 AM

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Let’s keep the non-zero pushback as a possible issue in our back pocket here. Because the cut piece is above the extruder, the boxturtle extruders will need to reliably exert force to push the cut all the way through past the extruder gears. Because after the pushback, the extruder is moved the same distance the other way, and if it still has a hold on the bottom piece, you’ll wind up holding that stub and it’ll be pulled into the sensor, just like in the picture and as described here. I set mine to zero on the flashforge. At least if you have a rubber band on the buffer (or the new hub-buffer combo) you might be able to get away with it, but make sure the pushback is big enough to fully clear the gears.

last crow Feb 18, 2026, 2:25 AM

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any news?

left cobalt Feb 18, 2026, 3:27 AM

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Yea I tried printing ASA and it failed to load or something, extruder kept sticking. unsure why.

left cobalt Feb 18, 2026, 4:22 AM

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How the fuck

rn_image_picker_lib_temp_ea1bcd62-f4c7-49aa-84e9-d12b37f098e2.jpg

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How did 2 pieces of filament slip next to each other

last crow Feb 18, 2026, 10:56 AM

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Isn’t there supposed to be PTFE there?

left cobalt Feb 18, 2026, 10:43 PM

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Inside the toolhead? No

#Need help calibrating filament loads/unloads