TheBub

However, without any Adhesion the gcode instructions begin on the object by going around its outer edges and may not stick, i.e. adhesion actually helps. It can turn out a tangled mess of plastic blobs or strands causing you to troubleshoot and level your build plate. It's in the gcode, it's not any problem with the printer. But, many people don't want that ridiculous brim either. So, I turned back on Adhesion but went into custom settings and searched brim. Under Quality and Build Plate Adhesion set the Brim width and line count to 1 or 0, made sure Initial Layer Line Width was 100% and Shell had a bottom thickness of 0.8mm and Bottom Layers was 4. You can check or uncheck Brim Only on Outside. Now, the Sliced gcode has a bottom layer to adhere the object's plastic to. The brim left at 1 is so thin and small it snaps off the edges and it became redundant, but the bottom layer, initial layer is important.

I finally figured out how to turn a 2D drawing into 3D print without the extra rim, frame, plate, base that Cura creates when you Slice the image into *.gcode. It is not setting the base to 0, that did not work. It is not dragging the image into and below the printing plate. It is not setting Z to a negative number. The answer is Adhesion setting under Standard Quality - 0.2mm in the top right of the Ultimaker Cura screen. It is checked by default. The extra rim plate is called Brim or Raft. Turning off Adhesion turns of brim or raft. Slice your image and you'll see a thin outline separated from your model image instead of that annoying solid rim plate Slicing automatically created. To thin that outside line even further under Custom Print Settings, Quality, Initial Layer Line Width set it down to 10% or so, Slice again and see that line get thin.