I think this is usual at least, as I couldn’t find anything similar. I’m printing batches of a simple handle, essentially a curvy cylinder. They print well except one in each batch, which usually has a few nodules on it. I worked out this was always the back right handle, so I assume that is where …

The sacrificial tower seems to be working nicely as a purge tower for you, giving a sacrificial object to let extrusion pressure stabilize before moving over to the parts. Very clever! As for that tower going crazy halfway up, seems like it has to be moving around. (since TPU is literally meant to …

Hard to say about the handle w/out seeing it (them) or the slice, but for the tower I’m guessing either too wobbly as it gets higher (any strings or blobs on the nozzle will whack it), and/or too fast for some reason once it gets past a certain height. Printing little narrow tubes/things like that …

[image] Help with printing problems General Discussions It’s because at the very tip, each layer is going down and not getting enough time to cool before the next one goes down. First set of images in the wiki article might look familiar laughing [bambustu…

That’s my feeling about the wibbly-wobbly, somewhat like time travel, as well.

TPU is the Bambu 95A. I’m not worried that the tower fails like that, it’s sacrificial and has resulted in all the items that matter printing perfectly now. Before the tower one handle, back right, ended up with nobbles on it. By adding that tower, which uses far less filament, all the handles the…

That’s probably true for that sacrificial tower, but it wouldn’t have been in the original. I don’t have a photo of the original handle fails, but it’s not the failure shown in that image. With the original print I had a heap of TPU handles. It didn’t matter how many, but the back right one, and onl…

[image] Natator: That’s probably true for that sacrificial tower, but it wouldn’t have been in the original. I don’t have a photo of the original handle fails, but it’s not the failure shown in that image. With the original print I had a heap of TPU handles. It didn’t matter how many, but the ba…

Ok, I follow your logic :slight_smile:

Unusual TPU problem?

Bambu Lab H2 Series

CarbonForge October 9, 2026, 3:18am 4