Would it make sence that my bearing started leaking oil into my hobbled bolt and it started skipping?
May I ask why your oiling sealed 608 berings?
I didn’t oil them, I assume the seal broke and the oil leaked out.
The teeth look fine, and I’m user most of the filament drive is from the teeth cutting in. But that sure looks bad.
Does the bearing spin freely? Did a lot of heat creep that high? I don’t understand why the bearing leaked.
That black stuff is some form of broken down PLA. I think it can evaporate and condense on the bolt. It’s also very good at leaking out of extruders.I think it’s the same stuff from the x files.
I print abs @Bracken_Dawson . The bearing spins fine @Jeff_DeMaagd . The only issue was that it was slipping on the filament at the same spot in each rotation (where the oil leaked).
Hi Thats a bearing collapse, sealed bearings do that and its an easy fix replace the bearing they can just fail but if it happens repeatedly you need to look for other issues, my previous life was in pump repairs and bearings will do that. cheers Di
Even with cheap bearings used in 3D printers, I’ve not seen that before.
I’d say, try to clean it up - into the hobb, replace the bearings and see if it still happens.
There isn’t enough lubricant in such a bearing to leak and cause a problem. Is the bolt cut precisely? When i do the cutting myself about half the bolts have one place where the cutting went a bit to deep, this will make the filament slip. Could it be that the cutting wasn’t very good and one or more edges deformed/broke? While it is possible that the bearing causes this, i never experienced it.
I had a lot of similar looking stuff between two of my bearings, just cleaned up the bolt and used new bearings. I put it down to cheap bearings!
I put a new bearing in and cleaned up the oil spill. It works fine again.