these four parts to assemble the Spring-loaded Drive Block alternative to the
MakerBot Replicator 2 extruder. The design files and assembly instructions for
this system are available on the
Thingiverse page. Print the available parts and attach them as instructed.
Check out Makerbot's
video for more information.
The Spring-loaded Drive Block is a simple system for pressing the filament
against the drive gear using a constant amount of force.