self winding spool with reversing diamond screw
thingiverse
animation: https://youtu.be/OqoSnrmeJQ0 remixed from planetary gearbox and this self reversing screw found on grabcad.com https://grabcad.com/library/self-reversing-screw-2 Designed, to raise a curtain with nema 17 motor and planetary gearbox and wind the string evenly on the drum. solidworks 2022 and stl file included
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