nozzle stays hot after printing
I finished my kit-build this evening, printed a benchy, upgraded to 6.3.3 and printed a scraper.
the hotend stays at 215C after printing and unloading filament, the fan stays on too. I expected it to cool.
What do I do wrong? Do I need to load filament in order for the hotend to stop heating?
thanks for your time,
Pea
Best Answer by Jürgen:
You are referring to a "filament unload" which you triggered manually, right -- not just the automatic filament retraction after printing? If so, I think the behavior of keeping the nozzle heated is intended by design. The assumption is that you plan to load a different filament right away. (Whereas, if you wanted to stop using the printer, you would keep the filament loaded and just shut the printer off.)
This has caused some confusion in the past, and not everyone agrees that it always makes sense:
https://github.com/prusa3d/Prusa-Firmware-Buddy/issues/3691
https://forum.prusa3d.com/forum/hardware-firmware-and-software-help/nozzle-and-print-bed-keep-heating-after-filament-unload-or-filament-load/
But I don't think any change has been made or is planned. If you need to unload the filament, then cool down the printer, you can trigger a Cooldown manually from the Preheat menu.
RE: nozzle stays hot after printing
I might have been unclear; the nozzle/hotend stays at 215C after printing has ended and does not cool, fan stays on. Surely this is not right? Right?
RE:
You are referring to a "filament unload" which you triggered manually, right -- not just the automatic filament retraction after printing? If so, I think the behavior of keeping the nozzle heated is intended by design. The assumption is that you plan to load a different filament right away. (Whereas, if you wanted to stop using the printer, you would keep the filament loaded and just shut the printer off.)
This has caused some confusion in the past, and not everyone agrees that it always makes sense:
https://github.com/prusa3d/Prusa-Firmware-Buddy/issues/3691
https://forum.prusa3d.com/forum/hardware-firmware-and-software-help/nozzle-and-print-bed-keep-heating-after-filament-unload-or-filament-load/
But I don't think any change has been made or is planned. If you need to unload the filament, then cool down the printer, you can trigger a Cooldown manually from the Preheat menu.
RE: nozzle stays hot after printing
Hi,
definitely NOT right from a first impression!
Can you upload your Slicer project?
Prusa Slicer -> Save As... -> give it a good name for us, like "hotend stays hot v1", zip the 3mf-file and attach it to your next post.
The "End G-code" in Prusa Slicer is:
So everything should cool down, normally.
{if layer_z < max_print_height}G1 Z{z_offset+min(max_layer_z+1, max_print_height)} F720 ; Move print head up{endif}
M104 S0 ; turn off temperature
M140 S0 ; turn off heatbed
M141 S0 ; disable chamber control
M107 ; turn off fan
G1 X242 Y211 F10200 ; park
G4 ; wait
M572 S0 ; reset PA
M84 X Y E ; disable motors
; max_layer_z = [max_layer_z]
RE: nozzle stays hot after printing
it were the 14 minute benchy and the spatula from the enclosed usb-stick, I didn't slice anything myself.
RE: nozzle stays hot after printing
it were the 14 minute benchy and the spatula from the enclosed usb-stick, I didn't slice anything myself.
Ah okay, then I guess it's a misunderstanding of "unloading filament"?
With firmware 6.3.1 ongoing, the filament is retracted out of the nozzle at the end of a print, but still in the extruder gears.
But a real "unload" indeed keeps the temperature up, as Jürgen said, to allow for a filament change right away.
RE:
I think I wrote a confusing text, I tried to edit but that was not possible anymore. Apart from being a Prusa-n00b English is not my first language.
I'll try again and familiarize myself more with the Core One and report back here.
Thanks for your time!
Pea
it were the 14 minute benchy and the spatula from the enclosed usb-stick, I didn't slice anything myself.
Ah okay, then I guess it's a misunderstanding of "unloading filament"?
With firmware 6.3.1 ongoing, the filament is retracted out of the nozzle at the end of a print, but still in the extruder gears.
But a real "unload" indeed keeps the temperature up, as Jürgen said, to allow for a filament change right away.