Titan Aero extruder assembly

grabcad

On March 5th, 2018, I upgraded my 3D printer's extruder assembly to V3.7.1 by making slight alterations in the idler arm part, smoothing surfaces for a better .stl appearance and widening the support structure for the press bearing enclosure. The improved extruder uses E3D Titan extruder with some modifications. Initially, the factory idler was plastic sliding on the stepper motor axle causing high motor temperatures; I designed an idler running on two ball bearings that decreased motor temperature to 45°C. The new design also includes an independent idler from the stepper axle for easier hot end centerline alignment. An excenter part was added to simplify tooth clearance adjustment, ensuring consistent assembly. Additionally, I switched to Hexagon A0 hot ends with exceptional heat breaks requiring less cooling. Stl files of these designs are available in the STL folder. Printing the excenter is straightforward; however, there are three versions of the extruder lever considering different nozzle sizes and layer thickness. The best material for printing is ColorFabb XT-CF20 carbon-filled filament.