While changing the nozzle and checking the screws on the back side of the hotend heating assembly, I realized, that there is an oily substance inside the toolhead, on the back of the heating assembly as well as on the inside of the light grey toolhead part and even inside the screw holes. I also took off the hoted cooling fan, and there was even more below it.
This happens on my A1 and on my A1 Mini, I checked both.
It is not the brown gunk that forms around the nozzle and the heater when printing, it is liquid and oily and it is in places where the gunk wouldn’t be.
The only explanation I would have is that there is some oil coming from the X-axis, although I am really careful about never applying too much and wiping off the rest. I can’t imagine how it could get there, as there is a physical barrier in between. If there was too much oil on the X-axis, I would rather expect it to drip into the part cooling fan (which is clean) than to make it s way into the toolhead somehow.
I am using Super Lube.
Does anybody have oil in the same places and or an idea, how it could get there ?
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A picture would be helpful. I might recommend cleaning it away and documenting how long it takes to return. My best guess is that it’s from the manufacturing process and seeps slightly out of joined parts when heated.
This is also the case with my two printers (A1 and A1 Mini), but I would rather say that it is a special heat-resistant grease. I recently had to open the AMS inlet for the four hoses to the printer because one hose was no longer holding. There is also a special grease in there, it feels a bit resinous and very solid.
That makes sense, because the parts have to be kept in motion. However, I can’t say to what extent this is relevant for maintenance.
Could it be, the Grease is transported over the Filament to the Nozzle and support the buildup of the brown gunk? Because it is not normal, that there is “brown gunk” buildup at all.
I had a nozzle clog on A1 with brown impurity that was quite fluid, so it creep between Nozzle and heating surface. I ended up to blame to much grease in the tangle Sensor Area that was applied during mounting in the bambu factory, as the A1 was really greasy and my A1 mini (no similar clog up to now) was way less greasy in this area. The Support denied this as a cause and i printed with a new nozzle after cleaning most of the grease and the heating unit afterwards.
I am unsure, if my theory that the grease was the main cause of the clog is wrong or if it could be correct.
Hi, i have the same problem with my new A1,
i have Oil(?) behind the heating assembly.
I already clean it for 3 times and it still comes back.
Didn’t removed the fans so maybe it is there to.
My bigest problem is that after some time my Print Plate is covered in a slim oil layer and nothing will stick.
I need to clean it almost every time after printing.
Did you get help from Bambulab or did it just stop ?
