Hotend Temperature sinking bevore nozzle cleaning
 
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Pompelmino
(@pompelmino)
Member
Hotend Temperature sinking bevore nozzle cleaning

The hotend temperature drops to 170 °C before nozzle cleaning, even though it was already at the correct temperature. After bed probing, I have to wait again for the hotend temperature to rise. Is there a reason for this? If not, does anyone know how to fix it?

Posted : 14/12/2025 9:57 am
1 people liked
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: Hotend Temperature sinking bevore nozzle cleaning

The printer has a two stage heat up. To reduce spotting and stringing on the heatbed

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

Posted : 14/12/2025 12:02 pm
1 people liked
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: Hotend Temperature sinking bevore nozzle cleaning

The printer has a two stage heat up. To reduce spotting and stringing on the heatbed

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

Posted : 14/12/2025 12:02 pm
1 people liked
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: Hotend Temperature sinking bevore nozzle cleaning

The printer has a two stage heat up. To reduce spotting and stringing on the heatbed

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

Posted : 14/12/2025 12:02 pm
1 people liked
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: Hotend Temperature sinking bevore nozzle cleaning

The printer has a two stage heat up. To reduce spotting and stringing on the heatbed

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

Posted : 14/12/2025 12:03 pm
1 people liked
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: Hotend Temperature sinking bevore nozzle cleaning

The printer has a two stage heat up. To reduce spotting and stringing on the heatbed

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

Posted : 14/12/2025 12:03 pm
1 people liked
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: Hotend Temperature sinking bevore nozzle cleaning

The printer has a two stage heat up. To reduce spotting and stringing on the heatbed

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

Posted : 14/12/2025 12:03 pm
1 people liked
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: Hotend Temperature sinking bevore nozzle cleaning

The printer has a two-stage heat up. To reduce spotting and stringing on the heatbed

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

Posted : 14/12/2025 12:04 pm
jan.d.slay
(@jan-d-slay)
Trusted Member
RE: Hotend Temperature sinking bevore nozzle cleaning

 

Posted by: @pompelmino

The hotend temperature drops to 170 °C before nozzle cleaning, even though it was already at the correct temperature. After bed probing, I have to wait again for the hotend temperature to rise. Is there a reason for this? If not, does anyone know how to fix it?

Please take a look at my signature. Tested with 6.4.0 and now again with 6.2.6 – works very well.

My printables
Prusa XL - Quick Start Gcode
Posted : 14/12/2025 2:58 pm
1 people liked
NickAtNight
(@nickatnight)
Estimable Member
RE: Hotend Temperature sinking bevore nozzle cleaning

Well said Joan (seven times of was it 8?*) 

so if we are already up to temperature, is it beneficial to cool to 170 C before heating back up to temperature?

Perhaps the cooldown helps to avoid ‘heat creep’ issues ?

*

Posted : 14/12/2025 3:46 pm
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