Filament not loading in toolhead extruder | ArmoredTurtle 3D | Page 1

uneven hill Oct 17, 2024, 9:28 PM

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I have filament properly making it to the toolhead sensor and hear the BT extruder running but it seems as if the toolhead extruder is not loading the filament during a T0-T3 macro.

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Direction of the toolhead extruder?

thick helm Oct 17, 2024, 9:38 PM

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Sorry I read too fast.

fierce grove Oct 17, 2024, 10:11 PM

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sensor before or after extruder?

worldly mountain Oct 17, 2024, 10:21 PM

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Does the long extrude pause before getting to the gears? If not, the bowden length is too long. See afc_bowden_length: 1750 in AFC.cfg.

uneven hill Oct 17, 2024, 10:54 PM

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Extruder gears are after the sensor

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Hard to tell, sensor is maybe 5-10 mm before gears.

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I will shorten the Bowden length variable

uneven hill Oct 17, 2024, 11:22 PM

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I shortened and can confirm that the filament slows down and pulses until it hits the toolhead sensor

worldly mountain Oct 17, 2024, 11:23 PM

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Now what happens? Have you confirmed that your toolhead sensor is functioning?

uneven hill Oct 17, 2024, 11:31 PM

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Yes, toolhead sensor functions.

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It appears as if the toolhead extruder isn't functioning.

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Filament makes it to short of the toolhead sensor and by extruder begins pulsing

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Filament then appears to push to toolhead extruder gears and stop

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After performing a T0, I can pull the filament out so it never gets drawn into the gears

fierce grove Oct 17, 2024, 11:34 PM

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whats your stn distance?

uneven hill Oct 17, 2024, 11:36 PM

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Default at 72

fierce grove Oct 17, 2024, 11:36 PM

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but what is your distance?

uneven hill Oct 17, 2024, 11:37 PM

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I didn't measure, I figured it would just extrude and I would reduce it depending on the amount that came out of the nozzle

fierce grove Oct 17, 2024, 11:38 PM

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but if your too short it might not be making it to the extruder gears

uneven hill Oct 17, 2024, 11:38 PM

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There is maybe 5-10 mm between filament sensor and gears

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Way less than the 72mm

fierce grove Oct 17, 2024, 11:39 PM

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does the extruder work?

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can you manulayy push it in and extrude?

uneven hill Oct 17, 2024, 11:39 PM

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Well, it did.

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I will verify with a short piece of filament

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rn_image_picker_lib_temp_ed02aed7-5536-4ef7-8650-2f2ffb2d6126.jpg

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Confirmed the toolhead extruder works

fierce grove Oct 17, 2024, 11:46 PM

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non of the legs make it to the extruder?

uneven hill Oct 17, 2024, 11:46 PM

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rn_image_picker_lib_temp_728bdb09-f8b4-4586-9cb0-fbe6213407b0.jpg

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I have only tested with leg 1

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Bt or toolhead?

rn_image_picker_lib_temp_f19a9f0c-665e-43ca-ae95-b6e4f7e119df.jpg

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Toolhead Filament sensor works

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Filament gets as far as the sensor

fierce grove Oct 17, 2024, 11:48 PM

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whats yout stepper cfg look like?

uneven hill Oct 17, 2024, 11:51 PM

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unit: Turtle_1:1
extruder: extruder
step_pin: AFC:M1_STEP
dir_pin: !AFC:M1_DIR
enable_pin: !AFC:M1_EN
microsteps: 16
rotation_distance: 4.65
dist_hub: 140
led_index: AFC_Indicator:1
afc_motor_rwd: AFC:MOT1_RWD
afc_motor_fwd: AFC:MOT1_FWD        # AFC_Lite
afc_motor_enb: AFC:MOT1_EN         # AFC_Lite
pwm: True
prep: ^!AFC:TRG1 #!AFC:TRG1 #^!AFC:TRG1         # AFC_Lite
load: ^AFC:EXT1  #^AFC:EXT1          # AFC_Lite

[tmc2209 AFC_stepper leg1]
uart_pin: AFC:M1_UART
uart_address: 0
run_current: 0.8```

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filament makes it to the toolhead sensor, and unloads ok

fierce grove Oct 17, 2024, 11:52 PM

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not sure

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have to do some research here

uneven hill Oct 17, 2024, 11:53 PM

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Thanks for the help

worldly mountain Oct 18, 2024, 12:29 AM

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The tensioner on the toolhead should be quite loose.

uneven hill Oct 18, 2024, 12:34 AM

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I will check

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But it grabbed the filament pretty easily when I manually fed

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ok, more information, but I don't understand it

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I pulled the bowden out of the toolhead and tried a T0

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the thought was I would let it go long and see if i would feel the extruder grab the filament

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It sent the filament to the regular spott with a fast move, then started pulsing

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I waited until I had 20-30mm exposed and stuck it into the toolhead, but when it got to the sensor, the pulsing move reversed direction

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and withdrew the filament all the way back to the BT extruder, without using the rewinder

worldly mountain Oct 18, 2024, 4:01 AM

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Try increasing the bowden length in the config. I can't remember how many pulsed moves it will make before giving up. Also, just conforming that you're using the sensor named tool and it has been tested to show triggered when filament is loaded?

honest spade Oct 18, 2024, 4:21 AM

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Software will time out after trying to move 20 time

uneven hill Oct 19, 2024, 2:01 AM

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Yes, using the sensor 'tool'

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The filament appears to make it to the toolhead sensor ok and I see the status change to loaded

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I can hear the BT extruder running to pty to push the filament to the toolhead extruder gears but I can only assume they aren't turning

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after I get a status that the toolhead is loaded, I can pull the bowden tube out of the toolhead and the filament is not loaded into the extruder, it pulls right out.

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actual distance from the toolhead sensor and the gears is 12mm and I have the STN set to 72 so it should definitely be enough distance to load

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tool_stn: 72 # Distance from the toolhead sensor to the tip of the nozzle in mm.

median totem Oct 19, 2024, 2:44 AM

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Set the tool_stn distance long enough that filament starts to push out the nozzle

worldly mountain Oct 19, 2024, 3:51 AM

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We might be getting to a place where a video might be helpful.

Another thing to try would be to have a short ptfe tube in the toolhead, with the main one disconnected, and a short piece of filament handy. Do the load, and at the point when the load exits the main bowden, put the second piece of filament into the toolhed. It should trigger the sensor and then maybe we can get an idea what's going on with the toolhead.

The rotation distaces on both the toolhead and the BT are close enough, right?

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Clean end on the filament?

uneven hill Oct 19, 2024, 7:13 PM

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median totem Set the tool_stn distance long enough that filament starts to push out the nozzl...

It is, but it isn't loading into the extruder gears which of course come before the nozzle

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wait, did I miss something huge? Does BT do away with the toolhead extruder and make this a bowden setup?

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with no extruder in the toolhead?

median totem Oct 19, 2024, 7:26 PM

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No BT is a secondary extruder set up.

uneven hill Oct 19, 2024, 7:26 PM

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Ok, made some progress

median totem Oct 19, 2024, 7:26 PM

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Try increasing your tool_stn value until it pushes filament out the extruder

uneven hill Oct 19, 2024, 7:27 PM

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I think I had a worn spot on the filament right where the the BT extruder needed to push the filament into the toolhead extruder

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when I clipped a section of filament off to test as you suggested(which worked fine btw) it is working now

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So I am guessing once it got past that spot, it was able to push hard enough to get it into the extruder

#Filament not loading in toolhead extruder