Delta 3D printers have a complex building volume shape (cylinder with three subtracted spheres). Delta 3D printers running Klipper have a simplified building volume consisting of a cylinder and a cone on top of it. Unfortunately, FLSUN slicer (as well as other popular slicers such as Cura) do not support such a building volume shape. Instead, they only define the radius and the maximum height of the building volume. This can result in incomplete prints.

Until FLSUN slicer supports Klipper-like building volume shapes, I came up with a practical solution to maximize the use of the building volume. I reconstructed the building volume defined in Klipper and exported it as an STL file. The volume consists of a cylinder with the radius 160 mm and the height 385 mm, and a cone with the radius 45 mm and the height 45 mm. When this STL file is loaded into the slicer concurrently with a model that needs to be printed, it will show whether the model exceeds the building volume limits by protruding out of the building volume shape. Otherwise, only the building volume shape is visible.

Here are the illustrated steps:

1. The model that needs to be 3D printed is loaded. The slicer thinks the model does not exceed the building volume limits.
2. The building volume shape is loaded concurrently. Now, it is visible that the model exceeds the building volume limits.
3. The model position and or size is adjusted until it is completely within the building volume.
4. The building volume object is unloaded and the model is ready to be sliced and sent to the printer.

Please, let me know what you think. Thanks!