[idbox] Secondary Extruder

thingiverse

This is a direct drive bowden extruder remodeled for deagostini idbox. It is assumed to be used as a secondary extruder, but it can also be used as a primary extruder. Remixed from: Compact Bowden extruder by scarou Merged from: [idbox] 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 Use for extruder 1 x NEMA17 stepper motor 1 x MK8 drive gear Outer diameter: 9mm Length: 11mm Hob diameter: 7mm Bore: 5mm 1 x PC4-M6 connector 1 x PTFE 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 If you use a spring compressor, you may choose a flat head screws. Truss head screws are not suitable for spring compressor. 2 x Compression springs 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") 4 x M3 nuts 12 x M3 washers Use 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 e_steps_per_mm = (motor_steps_per_rev * driver_microstep) * (big_gear_teeth / small_gear_teeth) / (hob_effective_diameter * pi) Spring Compressor 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.