Compact Belted Extruder with small Block-Hotend

thingiverse

##Belted Extruder with compact Hotend I designed this Belted Extruder for my DIY-3D-Printer because of two reasons: • Normal Bowden Extruders are unsuitable to print soft filaments like TPU or rubber-like • Most available Direct-Extruders are too big for my needs (width and heigh). This one indeed it's not the lightest one - but in sum it has fair compact measures and in case of need, the extruder-drive is easy reachable (clogged filament, etc), unscrewing the Front-Part with 6 screws. ####3D-Printed Parts All printed-parts are made of PETG with 70% infill with small parallelepipeds (also konwn as "cubic-infill"), so structures becomes strongest and nonetheless lightweight. With 4 Outlines/Shells on all sides. Parts are postet in .stl-format and - for redesign - also as .dae-files. ####Other Parts The Alu-Cooler is made of a simple square-bar (15x15x45mm), bored with 5 holes plus a shorted Heatsink (sawed part of available 40x40x20mm). All other parts have to be purchased, as beeing Pulleys, Fans, (Linear-)Bearings, Heater-Block, HeatBreak, Screws, Threads, Nuts, etc. - please see the BOM-list (Bill of Materials) for completeness. The 60Teeth GT2-Pulley has seven bored ø6.5mm-holes, to save weight. Same with the Cooler-Block - it has three ø8mm holes, these on both ends cut to half. See "60-Teeth-Gear-pattern.pdf" and "Cooler-Block_Alu.pdf". **New-1:** This [60Teeth GT2-Pulley](https://www.thingiverse.com/thing:4919859) also may be printed with ASA or PETG - now simpler + lighter. **New-2:** Originally the "X-Carriage-Cage" was made for two linear-bearings (see BOM:<br> 1x LM8UU and 1x LM8LUU => "X-Carriage-Cage_Double-L-Bearings.stl"), but now also it's possible to use the wider Cage => "X-Carriage-Cage_Triple-L-Bearings.stl" for three short LM8UU-bearings. A couple of screws with non-standard lengths are made from a sawed M3 threaded-rod + M3-nuts, glued together with Superglue. Lenghts in BOM-file. ####Assembling Assembling parts is shown in a 5-steps pdf-guide (same in .jpg). Screws and Nuts are all M3 (3mm diameter) with different lengths except one M4-Screw for the Extruder-Lever. See "Compact-Belted-Extruder_nl_BOM.txt". Additionally to Images and Fotos I made a Rotation-View of the assembled Extruder. => Please see my own [Comments] for new / redesigned parts!