Website: thingiverse
Author: MakerBot
Price: Free Download
File format: .Stl 3d printable
Description:
Based on the excellent work of Thingiverse users whpthomas, emmett, and whosawhatsis, this design incorporates a spring-loaded arm to squeeze the filament between the drive gear and a bearing with a constant amount of pressure. We added improvements to the designs, such as a hole below the drive gear to guide the filament