Thanks for the carefully considered replies. Nicholas.seward, It would be interesting to try. A square or rectangular nozzle would have to be made by constructing it in several pieces as you mention. I saw a video of a concrete printer contour crafting . The printer had a 3 in one extruder. Two nozzles for the perimeter of a wall and a larger moving one for the fill. At the start of the video iby martinfromoz - General
Hi, I'm new to 3d printing. I'm in the process of researching my first printer, how they work, the capabilities and limitations of 3d printers. I do, however have 12 years of manufacturing experience with plastic extrusion and injection moulding. Maybe this has given me and insight or maybe this has been discussed before? The main problem as I see it with 3d priting is the visible ridges of eachby martinfromoz - General