Dual drive geared extruder
Release status: working
| Description | A dual drive geared extruder made with savaged gears.
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Introduction
The Flow Rate of an extruder is one of the main issues to reach high print speeds. Trying to push the limits of flow rate in direct-drive extruders leads to motor stall or filament smashing. A geared extruder, as Wade's, increases the torque available to the hobbed gear. The motor is less prone to stall, but smashing filament is still an issue. With two hobbed gears pushing the filament, the force is distributed over larger area, so I started to try some projects that use dual gear extrusion. Up to now I found two designs of double-geared extruders that work nicely, but I decided to develop another one with minor changes. This project describes a geared dual drive made with savaged gears from an old laser printer.
Overview
[1] shows a large assortment of dual drive extruder designs. Those extruders have one hobbed drive connected to the motor shaft and other hobbed drive conducted by a spring loaded lever, as shown in the figure below.
