Moebius (Mobius) strip. No support.

thingiverse

Recently, I posted a similar strip in a stand and pondered if it could be printed without one. To my delight, the print went smoothly without any significant issues. I printed the design at 2x its original size for added stability. The STL file provided includes removable stabilizing posts. Printing was done using DiamondAge PLA on an Ultimaker 1. Photos show the item before finishing and still attached to the print plate. For printing, I used 210°C temperature, 0.2mm layer height, 1.2mm shell thickness, and 20% infill without needing a brim, raft, or support. The print speed was mostly at 50mm/s, but slowed down for the top third section. Despite some imperfections in certain areas, especially the underside of the center bottom section and the apex, I believe post-printing cleanup can resolve them. For future improvements, using support might enhance those regions; however, it has not been tested yet.