High temperature on extruder motor.
Hello!
I'm Adrian and 1 month ago my PRUSA MK3S + kit arrived, I've been using 3d printers for about 4 or 5 years and I wanted a PRUSA. I have noticed that the extruder motor gets quite hot, I don't know if it is something normal since it is the first time that I have a PRUSA. I have to say that the rest of the motors also take temperature but not like that of the extruder. It does not seem that it is forced and the filament passes correctly. What should i check? Has something similar happened to you?
Thank you all!
RE: High temperature on extruder motor.
It does get quite warm
RE: High temperature on extruder motor.
I mounted a junk box alumin(i)um heat sink on the extruder motor with heat conducting cement. It's visible in the photo below.
RE: High temperature on extruder motor.
Thank you so much! I'll bring a heatsink from work and put it on. 😉 😀
RE: High temperature on extruder motor.
I have noticed it just one time on my printer. And that was with a gode that Prusa provided for a MMU print.
With the prints that I slice myself I don't have temp problems.
I have no idea what really caused it but it looks like some settings can put a lot more heat in the extruder motor.
RE: High temperature on extruder motor.
[...] I have noticed that the extruder motor gets quite hot, I don't know if it is something normal since it is the first time that I have a PRUSA.
There's nothing wrong with putting a heat sink on your extruder. There are versions with fans available on Thingiverse. I would recommend spending just a bit of time making sure there's not something in your setup contributing to the heat though. It's important to remember that the hotend on the Mk3 is an air-cooled design. It works in ambient temperatures up to around 40C. Any hotter and the efficiency of the air cooling drops off. If the internal temperatures approach those at which low temp filaments like PLA soften, the extruder has to work much harder.
- Are you printing in an enclosure or warm space?
- Is there sufficient airflow around the printer for the hotend fan and heatsink to work efficiently?
- Is anything obstructing the flow of filament down through your extruder and into the hotend?
- Is the extruder tension idler gear able to spin freely?
- Is there anything obstructing the hotend or nozzle?
- Are you printing with lots of retractions?
Every year, we start to see a lot of heat-related posts as many users move into the summer months. I've compiled some notes on heat and feed-related issues here that might be helpful.