SUNLU FilaDryer S4

Moisture is the silent killer of 3D printing: wet filament strings, bubbles, and rough layers — and engineering materials suffer worst. Drying is a step no serious printer can skip. SUNLU, the pioneer that invented the filament dryer category with over 600,000 units shipped, answers with the fourth-generation FilaDryer S4. It tackles the five most-requested upgrades: larger capacity, better efficiency, balanced temperature, fast heating up to 70°C, and universal spool compatibility. Preconfigured profiles for PLA, ABS, PETG, TPU, PA and PC remove setup guesswork; automatic humidity control and MO2 mode keep material dry for days. A PTC heater with dual-level thermal safeguards plus soft-gel rollers protect spools from deformation. The campaign passed 5,000 backers in ten days and closed with 5,956 supporters raising HK$4,843,890 (~$619K) — 4,843% of goal.