Gear Ratio in Extruders The gear ratio in extruders refers to the mechanical advantage created by using different-sized gears to control filament movement. A high gear ratio increases torque, allowing for better control of filament extrusion, especially when printing with flexible or high-viscosity filaments. Direct-drive extruders often use a 1:1 gear ratio, while Bowden-style extruders or high-precision setups use higher ratios like 3:1 or 5:1. This improves extrusion accuracy and helps prevent filament slipping or grinding. Printers with geared extruders typically provide better performance at lower extrusion speeds, making them ideal for detailed prints or materials requiring slow feeding.
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