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XL hot end wont get past 170 - still brand new  

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PonyBoy Pop Art
(@ponyboy-pop-art)
Active Member
XL hot end wont get past 170 - still brand new

I'm confused.  Got my Prusa XL setup, and got literally (3) prints out.  Ran out of filament and had a minor issue with getting it to reload, as it claimed that there was still filament in the sensor.  Left it for a few days, and finally got back to it.  Set it to heat to PLA, and it never gets beyond 170.  It bounces at 169-170 and stays there.  At first I would think that this is a thermistor issue, but literally (3) prints and zero fails.  Why would I have a fail like this already?  I understand when we get into hundreds or thousands of hours of printing, but this!?!  

Any clues appreciated.

Respondido : 20/02/2024 10:27 pm
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: XL hot end wont get past 170 - still brand new

Could it be the Printer settings, Custom Gcode>Start Gcode?

M104 T0 S{((filament_notes[0]=~/.*HT_MBL10.*/) ? (first_layer_temperature[0] - 10) : (filament_type[0] == "PC" or filament_type[0] == "PA") ? (first_layer_temperature[0] - 25) : (filament_type[0] == "FLEX") ? 210 : (filament_type[0]=~/.*PET.*/) ? 175 : 170)} ; set extruder temp for bed levelingM109 T0 R{((filament_notes[0]=~/.*HT_MBL10.*/) ? (first_layer_temperature[0] - 10) : (filament_type[0] == "PC" or filament_type[0] == "PA") ? (first_layer_temperature[0] - 25) : (filament_type[0] == "FLEX") ? 210 : (filament_type[0]=~/.*PET.*/) ? 175 : 170)} ; wait for temp

I believe that translates to Do a two stage heat up. 
Heat to 170C, run Mesh Bed levelling,  Then heat to normal first layer temperature and continue... 

the Mini has been doing this for years... 

regards Joan

 

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK

Respondido : 21/02/2024 12:10 am
Diem
 Diem
(@diem)
Illustrious Member

Don't forget you have two sensors per filament - if the end of the filament overcooked during the run-out you might have a string left behind in the nextruder sensor.

Cheerio,

Respondido : 21/02/2024 8:15 am
PonyBoy Pop Art
(@ponyboy-pop-art)
Active Member
Topic starter answered:
RE: XL hot end wont get past 170 - still brand new

Nope.  Not using GCODE.  Just using the Front Display using "PREHEAT PLA"

Respondido : 21/02/2024 4:16 pm
PonyBoy Pop Art
(@ponyboy-pop-art)
Active Member
Topic starter answered:
RE: XL hot end wont get past 170 - still brand new

I assume that there is a YouTube video or similar on how to check this?  The Nextruder is a new concept to me, and looks like a magic-black-box.

Respondido : 21/02/2024 4:17 pm
Diem
 Diem
(@diem)
Illustrious Member

https://help.prusa3d.com/article/filament-sensor-mk4-mk3-9-xl_465702

Cheerio,

Respondido : 21/02/2024 5:18 pm
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