Probleme bei Cura 4.4 und einer selbsterstellten obj Datei

[eddie_teddie 0]

 

Hi, i need a small help. I will programming a small Prog that created 3d Printing Objects for me.

 

I created an triangle Pipe but cura will made a Triangular Prism and not a pipe ( after Slicing ). Can anyone say me whats wrong.

 

Thanks for helping

 

Erik

 

o test1a
v 0 50 0
v 0 55 0
v 43.30127 -25 0
v 47.6314 -27.5 0
v -43.30127 -25 0
v -47.6314 -27.5 0
v 0 50 50
v 0 55 50
v 43.30127 -25 50
v 47.6314 -27.5 50
v -43.30127 -25 50
v -47.6314 -27.5 50
s off
f 1 3 9 7
f 2 4 10 8
f 1 2 4 3
f 7 8 10 9
f 1 2 8 7
f 3 5 11 9
f 4 6 12 10
f 3 4 6 5
f 9 10 12 11
f 3 4 10 9
f 5 1 7 11
f 6 2 8 12
f 5 6 2 1
f 11 12 8 7
f 5 6 12 11