Spin the pumpkin and adjust the drill depth so it doesn't hit the pumpkin, but barely.Getting the surface location figured out would be fun. Probe with a touch sensor and some sort of mapping combined with rough measurements?
I was more thinking to kind of map the surface and possibly give you a preview of how the cut might need to be adjusted.Spin the pumpkin and adjust the drill depth so it doesn't hit the pumpkin, but barely.
Then just have the drill plunge 2-3 inches inwards. If it drills through the wall of the pumpkin and beyond, who cares.
I suppose you could put a BLtouch type of thing on there and map the surface of the pumpkin, but that'd have to be brought back into CAD software and I'm not sure what the workflow would be there.