create the rotary profile (end of axis view perspective) in your CAD. Note you must have radius corners. I found that 2.5mm R on a 6mm wall finally was accepted by sheetcam, where 1.5mm was not. I’m not sure if this is a near minimum radius dim or % of wall thickness. Just be aware.
import to the dxf of the profile on a flatsheet drawing.
menu Options / ‘Rotary plasma’, select 'Custom’ work type.