Multi-Purpose Electric Spool Winder with Empty Spool, Auto Start/Stop Filament Rewinder for 3D Printers, Yarn & Thread, Supports ≤4mm Diameter, Adjustable Tension & Direction

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• 【Smart Auto Start & Stop】Equipped with a precision filament detection sensor, this spool rewinder automatically starts or stops when material flow changes — preventing tangles, overfilling, or wasted filament. Enjoy fully automated, hands-free winding for your 3D printing or craft materials.
• 【Auto 3D Filament Respooler】This intelligent filament respooler features built-in software programming for advanced users. Adjust speed, tension, motor direction, and lighting, and upgrade firmware easily via computer connection — achieving precise and personalized control for every project.
• 【Supports up to 4mm Wire】This Electric Spool Rewinder is suitable for any wire with a diameter of 4mm or less, including solder wire, yarn, and 3D printing filament. Note: Only 1.75mm filament supports intelligent start/stop detection. For thicker wire, you can enlarge the feed hole using a simple tool.
• 【Efficient, Tangle-Free】Quickly and smoothly transfer filament, welding wire, or sewing thread from large industrial reels to compact spools. Experience even, organized winding that saves time and eliminates material waste.
• 【Quiet & Universal】Built from reinforced ABS with a smart, low-noise motor, this electric spool rewinder runs stably and efficiently for long periods. Perfect for 3D printing labs, workshops, and DIY creators — compatible with PLA, ABS, PETG, and other filaments up to 1 kg.