Compact Bowden Extruder Plus

thingiverse

This extruder is the fourth generation counted from the original Compact Bowden Extruder. ##Updates - Added type C body and related files (2018-04-23) - Updated CG image (2018-04-23) - Updated assembly picture (2018-06-09) - Added idler V2 files (2018-07-04) - Added a printed type C body picture (2018-07-04) ##Basic Data - Extruder type: bowden - Drive method: direct drive - Stepper motor: NEMA 17 - Filament diameter: 1.75mm - Drive gear: MK8 drive gear - Push-fit connector: PC4-M6 ##Extruder Body Types - Type A This type can be mounted on a box-type printer. The distance between the two holes of the mount part is 49mm. If the holes position of the mount part does not match the holes position on the printer side, you can use Blender to edit the STL file and move the holes position. - Type B This type can be mounted on a printer with T-slot. - Type C This type can be mounted using a metal bracket or [gimbal](https://www.thingiverse.com/thing:2944060). If you replace the motor spacer with a metal bracket, you will need to change the screws (M3x8mm -> M3x10mm, M3x10mm -> M3x12mm) that mounts the stepper motor and extruder, furthermore four sets of screws/nuts/washers for mounting on the printer are also required. ##Requirements - Body/Idler - 1 x NEMA 17 Stepper motor - 1 x Heatsink for Nema 17 stepper motor (optional) - If you printed the body with PLA filament, it would be better to attach a heatsink - 1 x MK8 drive gear - Outer diameter: 9mm - Length: 11mm - Hob diameter: 7mm - Bore: 5mm - 1–2 x PC4-M6 push-fit connector - 1 x Threadlocker - Lock the thread on the push-fit connector - 1 x Soft pick - Used to clean the drive gear automatically - 1 x 625ZZ bearing (or 625-2RS bearing) - 1 x 608ZZ bearing (or 608-2RS bearing) - 1 x Small sponge piece (idea from Marco67) - Attach it to the screw head when using the 3D printer, and remove it from the screw head when finished using the 3D printer - Mount (Type A) - 2 x M3 screws - 2 x M3 hex nuts - 2 x M3 washers ##Print Settings - Body - Nozzle diameter: 0.4mm - Resolution: 0.2mm - Perimeter count: 4 - Infill: 30% or higher - Idler - Resolution: 0.2mm - Perimeter count: 4 - Infill: 90% - Bearing spacer - Resolution: 0.2mm - Motor spacer - Resolution: 0.2mm - Spring compressor - Resolution: 0.2mm - Washer board - Resolution: 0.2mm ##Spring Compressor The spring compressor has a function to quick release/restore the spring pressure. Please attach it to the screw head when using the 3D printer, and remove it from the screw head when finished using the 3D printer. The burden on idlers when 3D printers are not used decreases, and the idlers becomes hard to break. ##CBE_Idler_Set_*V2.stl - Changes from previous version - Made left and right idlers the same thickness - Reduced cylinder size ##Related Thing - [1.5 Axis Gimbal for NEMA 17](https://www.thingiverse.com/thing:2944060)