RepRap Extruder for Tamiya Universal Gearbox

thingiverse

The RepRap extruder drive design is compatible with Darwin's quickfit clamp system and Ponoko's lasercut kit. It accommodates either 16mm PTFE or heatsink-based heaters. Notably, the design requires no lathing or machine tooling for fabrication. An opto sensor may be fitted to regulate rotation speed; however, an all-metal heater assembly necessitates its use. If you develop software for this purpose, we'd love to see it! The drive screw is a 50mm M5 component cut from an M5 bolt. Coupling occurs via an M5 grub screw lock-nutted at the top of the drive screw. A 2.5mm hex key replaces the Tamiya output shaft and connects to the grub. Filing off the grub screw's tip aids in fitting. Assembling requires assorted M3 nuts, bolts, and washers. Maintain compression by placing springs under the four screws holding the filament and screw holders together, as per the original RepRap screw extruder on the RepRap wiki. The thrust bearing is formed by a locknut and two washers in the cavity of the screw holder. Additionally, half an M5 nut drilled to 5mm supports the drive screw near filament contact for optimal worldwide component sourcing.