![]() What is used frequently together with support in Ultimaker Cura is the option called Enable support roof, this will create a dense top layer on top of the support interface which allows for pretty good bottom surface of the overhang. Starting and stopping extruding in thin air will result in deposition of the extruded material on the location the nozzle crosses a prior layer (often seen when support structure pillars have fallen over). (screw) holes are often covered with 2 layers over the screw hole so that you use bridging to print (the cutout shows that the hole has a bottom):Īfter printing you need to punch through the layers to open the hole. You cannot print into the air, you can however print lines on top of a prior layer with a certain overlap, or bridge a certain gap. You need either support or change the print orientation. How to configure PrusaSlicer to prevent printing in the air Add physical printer settings as env variables for post-process scripts 2282 Post-process script execution: now add python/perl before a. gapfillminlength: will remove the extrusion is too short Supports layer height now try to respect the zstep a bit more. Or you could make a sacrificial bridge layer so that the first layer is solid bridge all the way across, and cut/drill it out after the print is done. gapfillextension: increase the length of the gapfill by stretching it. Alternatively you could design your own support into the model and put it just under the hole in the middle, letting the flat part bridge. If you're willing to use Cura, Conical Supports or Tree Supports will let you support this with less waste material and make removal easier. This is all new stuff slicers have just not been programmed to do. There needs to be overlap, computation to compensate for the fact that extrusion lines will not squeeze out to their nominal width because there's nothing below them to extrude against, and using the overlap in the XY direction to achieve that instead. The hard part is making the slicer automatically figure out that that's what it's supposed to do.įor your needs, just printing from outer loop inward here is not going to suffice. ![]() However, it's currently only being done with software to assist in hand-crafting gcode to make the printer do what you want it to do. You can see from this demo that the kind of printing you want is possible. The inability to do this is not fundamental, but it's currently a limitation in slicing software, and not likely to change soon.
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