[idbox] Secondary Extruder

thingiverse

This is a direct drive bowden extruder remodeled for deagostini idbox. It can be used as either a secondary or primary extruder. Remixed from compact bowden extruder by scarou and merged with filament funnel set, pacman helper disk v2 by midniteandy. Updates: 2017-01-29: added spring_compressor.stl 2017-03-02: added secondaryextruder_body_disks_supportv2.stl 2017-12-21: added spring_compressor_v2.stl and washer_board.stl 2017-12-28: added spring_compressor_v2.1.stl Requirements for extruder: * 1 x nema17 stepper motor * 1 x mk8 drive gear * Outer diameter: 9mm * Length: 11mm * Hob diameter: 7mm * Bore: 5mm Required components for assembly: * 1 x pc4-m6 connector * 1 x ptef tube * Outer diameter: 4mm * Inner diameter: 2mm * 1 x 625zz bearing (or 625-2rs bearing) * 1 x 608zz bearing (or 608-2rs bearing) * 2 x m3x8mm pan head screws * 2 x m3x10mm pan head screws * 2 x m3x15mm pan head screws * 2 x m3x40mm any screws * 2 x compression springs Wire specifications: * Wire diameter: 0.5-1mm (0.0197-0.0394") * Outer diameter: 5-7mm (0.1969-0.2756") * Free length: 10-15mm (0.3937-0.5905") Additional components: * 4 x m3 nuts * 12 x m3 washers Requirements for mount: * 2 x m3x14mm truss head screws * 2 x m3 nuts * 2 x m3 washers Other requirements: * 1 x dual print head * 1 x hotend kit Print settings: Body settings: resolution: 0.2mm perimeter count: 4 infill: 30% rafts: yes supports: yes supports everywhere: no Idler settings: resolution: 0.2mm perimeter count: 4 infill: 60% (or higher) supports: yes Spring compressor settings: resolution: 0.2mm supports: no Marlin firmware settings: configuration.h: invert the direction of motor rotation #define invert_e1_dir true e steps per mm: hob effective diameter: 7mm #define default_axis_steps_per_unit {71.1111, 71.1111, 3200, 145.5131} hob effective diameter: 6.9mm #define default_axis_steps_per_unit {71.1111, 71.1111, 3200, 147.6212} hob effective diameter: 6.8mm #define default_axis_steps_per_unit {71.1111, 71.1111, 3200, 149.7929} hob effective diameter: 6.7mm #define default_axis_steps_per_unit {71.1111, 71.1111, 3200, 152.0286} reference: triffid hunter's calibration guide - reprapwiki spring compressor settings: insert the spring compressor between the screw head and the washer. you can increase the pressure on the spring. when 3d printing is finished, pulling out the spring compressor from the screw head can reduce the burden on the idler and the spring. washer board: the washer board makes it easy to insert the spring compressor. attach to the screw head protruding from the idler.