having the hotend and extruder as separate devices has become the standard. This week at the Midwest RepRap Festival, E3D unveiled the Titan Aero. It’s an extruder and hotend rolled into one ...

and an E3D v6, which is fantastic) worked way better and was pushing out too much filament. The hotend, driver gear, extruder mechanics, back pressure, motor, and plastic type all work together ...