Hello everybody!
What could be wrong to cannot printing properly?
[www.youtube.com]
[www.youtube.com]

Your Z-home endstop is not set correctly? It did not start first layer extruding against the bed?

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Prusa i3, Ramps 1.4. Catnozzle 0.4mm
SketchUp - Enveloping Globoid Worm Gear - Part One - 3D Printed: [youtu.be]
DesignSpark Mechanical & more precise screw thread: [youtu.be]
Nicer Screw Thread In SketchUp ( Bolts,Nuts): [youtu.be]
How To Model A Heart Shape In SketchUp: [youtu.be]
How To Draw 3D Printable Snap Fit Ball Joint In SketchUp: [youtu.be]

Tomorrow I will upload a new video about that ,because looks like fixed it,but its not okay too...