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Hotend fan speed for MK3S  

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Nutt
 Nutt
(@nutt)
Member
Hotend fan speed for MK3S

My fan shows the speed of 4200 rpm but I have filament not extruded after 20-25 min. after start printing seems like heat creep.

What is the normal speed for this fan ?

Posted : 07/04/2025 2:33 pm
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: Hotend fan speed for MK3S

Is the fan a standard Prusa fan, or aftermarket? 
I had problems with Aftermarket. until I Found the hidden experimental menu 

https://help.prusa3d.com/article/experimental-menu-mk3-s-_161213

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

Posted : 07/04/2025 4:35 pm
Nutt
 Nutt
(@nutt-2)
Member
RE: Hotend fan speed for MK3S

It's original Prusa fan and about 3 years old but not so many prints.

Posted : 07/04/2025 5:25 pm
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: Hotend fan speed for MK3S

Try the alternative settings in the experimental menu
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

Posted : 07/04/2025 6:21 pm
Nutt
 Nutt
(@nutt-2)
Member
RE: Hotend fan speed for MK3S

Please tell me the speed 4200rpm is correct or too low.

Posted : 07/04/2025 11:19 pm
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: Hotend fan speed for MK3S

Sorry, I can't help, 
1, I am away from home at the moment, 
2, My printer has a non standard fan. 

Maybe someone else can help!

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

Posted : 08/04/2025 10:00 am
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