TPU Anomalies

My Ducky in TPU. Any thoughts on the anomalies I’m getting? It’s been a long time since I printed TPU, first on the U1, so I’m not all that familiar with it but the left side is clearly cleaner than the right; although it has issues too.

  1. Under the wings, no Supports
    1. Bottom left is beautiful / bottom right is ugly
  2. Under the chin area without Supports
    1. Defects run slightly to left of center to very drastic right of center
  3. Almost cut like “gouges”
    1. On both sides and possibly from the Support structure?
  4. I am ecstatic about the Supports how easy they were to remove! I ran a test for both top and bottom removal and for me 0.21 is darn near perfect. Also, look at how clean my “signature” is :sign_of_the_horns::sign_of_the_horns:

1.

Looks to me like a lot of sagging due to TPU needing a higher angle set for when support is required (sorry, not got into Orca yet and not sure of the terminology). TPU also needs maximum cooling to stop it staying soft too long.

Something else which might help is outer shell print order. You can set that to outside in or inside out. Outside in provides best dimension control and first layer bed adhesion, but inside out is best for overhangs.

Appreciate all that info @CrazyIvan :sign_of_the_horns::sign_of_the_horns:

Inside out vs outside in makes sense. I’ll also do some manual Support painting.

Thing that I didn’t understand is the bottom left is perfect without supports but the bottom right is bad. Same exact shape and “overhang” so I feel like the bed is off on the right side… if that’s a thing. I’ll do a manual bed level from the control panel on the U1 and see if that helps.

I’ll try increasing the cooling as well.

I can say much about U1 but on F350 Dual sometimes you need to arrange model in a way that cooling fan blowing on part that express getting less cooling than needed.

Left vs. Right is likely a cooling fan issue. I don’t have a U1, but I believe the cooling fan is to the left of the hot end?