No doubt there's a better way but I do a lot of helical cut's (spiral staircase's). I generally create a helical boundary surface from a helix and a sketch line equivalent to the axis.
This surface can be used for cutting or extruding to - I also move it around (copy, translate or offset as required) to reuse it..
In your case extruding up to the surface would probably be best, when cutting with the surface it may have to be extended.
I tried doing a boundary cut but had the same prob as your loft
Thank you for your solutions. Turns out what I was doing wrong is that the profile sketches (for the lofted cut) were right on the edge of the surface. When I made them a bit larger I could make the cut:
Hi Ben
No doubt there's a better way but I do a lot of helical cut's (spiral staircase's). I generally create a helical boundary surface from a helix and a sketch line equivalent to the axis.
This surface can be used for cutting or extruding to - I also move it around (copy, translate or offset as required) to reuse it..
In your case extruding up to the surface would probably be best, when cutting with the surface it may have to be extended.
I tried doing a boundary cut but had the same prob as your loft