I build flange systems with the 3D printer. If you print a normal flange, then you always have to print cylindrical support structures around the whole tube. Printing these support structures is very time consuming. The material used is just waste. According to the slicer software, the overhang threshold alpha (max) 55°. For overhangs whose angle of inclination (90°=vertical) is above this threshold, no support material is generated. In other words, this value represents the largest horizontal slope (measured from the horizontal plane) that can be printed without support material.
In order to save support material, I considered the possibility of constructing ledges into the part. The required material for support structures is much lower and the required printing time should be much shorter. Especially with large and high parts (in Z-direction) you can save a lot of material and costs. I tried to construct the ledge using a small triangle. Revolution around the axis should then create the ridge. Unfortunately the function does not work. I do not know why? Can someone help me please?