The eSUN eBOX Pro Filament Dryer is an upgraded heating, dehumidifying, and real-time monitoring storage chamber engineered to eliminate moisture-induced printing defects on FDM 3D printers. Featuring a 360-degree surrounding heating film, built-in circulating fan, electronic weight measurement scale, and dynamic digital display, this unit actively bakes and dries 1kg filament spools while providing seamless direct-feed capabilities to printer extruders during operation.

Specification

• Product Model: eSUN eBOX Pro (Upgraded Pro Series)
• Input Voltage: 100V - 240V AC (50/60 Hz) via included 24V DC / 2A (or 36W - 48W) Power Adapter
• Maximum Operating Temperature: Up to 65°C - 70°C
• Timer Setting Range: 0 to 24 Hours (Continuous countdown / auto-off timer)
• Integrated Weighing Scale: Electronic weight monitoring sensor (Range 0 - 2kg with tare function)
• Spool Compatibility: Accommodates 1 x standard 1kg or smaller spool (Max Spool Diameter: 200mm, Max Spool Width: 73mm)
• Filament Diameter Compatibility: 1.75mm, 2.85mm, and 3.00mm filaments
• Supported Filament Materials: PLA, PLA+, PETG, TPU, ABS, ASA, PC, Nylon (PA), PVA, HIPS, and carbon fiber composites
• Display Interface: Multi-functional digital LCD display showing real-time temperature, target level, timer countdown, and remaining spool weight (g)
• Chamber Thermal Architecture: Arc-shaped heating sheet with built-in internal thermal convection circulation fan

Features

• Surrounding Arc Heating with Convection Fan: Incorporates an arc-shaped lower heating plate paired with a micro-convection fan to circulate warm air evenly around the entire spool, ensuring uniform moisture extraction without hot spots.
• Real-Time Spool Weight Monitoring: Features a built-in high-precision load cell that tracks remaining filament weight in grams, allowing operators to verify if enough material remains before launching long print jobs.
• Multi-Material Preset Temperature Levels: Provides easily selectable heating levels tailored to different polymer melting and glass transition points, from low-temperature PLA/TPU up to high-temperature engineering filaments like Nylon and PC.
• Direct In-Print Filament Feeding: Equipped with smooth internal roller bearings and rubberized exit grommets, allowing filament to feed directly into the 3D printer extruder while the heating cycle is active.
• Sealed Dust and Moisture Protection: Built with an integrated silicone sealing ring along the chamber perimeter and an internal desiccant storage bay, keeping filament dry during active heating or passive post-bake storage.

Common Applications

• Engineering Filament Dehumidification: Removing deep hygroscopic moisture from Nylon (PA), PVA, PC, and PETG to prevent severe bubbling, stringing, and weak layer bonding.
• Print Defect Elimination on PLA and ABS: Eliminating popping sounds at the nozzle, under-extrusion voids, and brittle filament snapping caused by humid storage conditions.
• Continuous Filament Feeding for Extended Prints: Acting as a heated dry reservoir to supply bone-dry filament during multi-day, large-format 3D prints in humid workshop environments.

Professional Installation and Maintenance Tips

• Select Proper Heating Level for Material: Always match the temperature setting to your filament type (e.g., Level 1/2 for PLA/TPU around 45°C - 50°C, Level 3 for PETG/ABS around 50°C - 55°C, Level 4 for Nylon/PC around 60°C - 70°C) to prevent the filament from softening and sticking to itself on the spool.
• Ventilate Moisture During Initial Heating: Slightly prop open the top lid or leave the rubber filament exit port open for the first 30 to 60 minutes of drying very wet spools to allow evaporated moisture to escape the chamber.
• Route PTFE Tube Directly to Extruder: When printing directly from the eBOX Pro, insert a length of 4mm OD PTFE Bowden tubing into the output grommet and guide it to your printer's extruder intake to prevent ambient air from re-hydrating the filament line.
• Tare Empty Spool Weight for Accurate Readings: Use the tare function to zero out the weight with an empty spool of the same brand if you need precise tracking of the net remaining filament weight in grams.