Submitted 4 weeks ago by Natanox@discuss.tchncs.de to 3dprinting@lemmy.world
https://discuss.tchncs.de/pictrs/image/27715756-dfdc-4387-9079-b9012162477e.mp4
Started making these sounds in the middle of the print. It kept extruding though, didn’t stop or something. The stepper motor isn’t that old, but wasn’t expensive either. Anyone knows this sound?
You sure you didn’t get an agitated cicada stuck in there?
Seriously, though. It could be the stepper or even just a cooling fan.
It’s no fan, I checked that. Also definitely comes from the extruder assembly, I could slightly manipulate it if I was pushing on the filament from above.
Then worn bearings on the extruder gears, or a gear chipped.
UPDATE:
It apparently was a damaged ball bearing. Upon opening the extruder once again I found some black grease littered around one of the tiny bearings that’re supporting the extruder gear axle. Replacing them solved the issue, many hours of printing with no angry cicada in my printer anymore.
Would’ve never expected such a tiny thing to make this much ruckus.
It definitely sounds like a fan scraping on something. it also seems to be triggered by the extruder changing direction, but only briefly as it jerks. Have you checked fan bearings in the hotend and part cooling? Or just something as simple as parts being tightened properly?
Welp, it was one of the tiny ball bearings of the extruder gear axle.
Unplug the motor to see if there is a difference
steppers work or they don’t. Likely a fan blade hitting something.
sounds like the air scoop is scraping on tbe print
squaresinger@lemmy.world 4 weeks ago
Unlikely that it’s the stepper. It sounds like something’s scraping. I heard similar noises after inconsistent extrusion on infill, so that the infill was standing up a little bit and the print head was scraping over it.
Could also be ball bearings or something else in there that’s scraping over something. It is most likely something connected to the motion.
Natanox@discuss.tchncs.de 4 weeks ago
I’ve checked the print it was working on and changed the Z-offset, had no influence on these scraping sounds. It’s definitely somehow connected to the extrusion, that’s why I assumed it to be the stepper.
Do you think those really tiny bearings used for the extruder axis’ can make such a sound? Other than that I’m really out of ideas outside basically sanding down anything that could be the problem… I even made sure to print the whole MK4 extruder you see in the video on the Prusa MK4S of my local hackspace to make sure it has perfect dimensional correctness etc.
marcos@lemmy.world 4 weeks ago
Absolutely, yes. If it never made that sound and started with age, do not go sanding anything. Clean and lubricate again and look for broken parts.
Any point of contact can be making that noise. Including the motor, yes, but everything else is more likely.
squaresinger@lemmy.world 4 weeks ago
In the middle of the print change the flow modifier to 0%.
That will turn off the extruder while leaving everything else as-is.
I suspect it’s the X or Z bearings.