Abstract: A filament drive for an extruder for an additive manufacturing system is provided. A drive gear is driven by a motor. A first driven gear is operably driven by the drive gear. A first hob has a toothed outer periphery connected to the first driven gear. A second driven gear is operably driven by the drive gear. A second hob has a toothed outer periphery connected to the second driven gear. The toothed outer peripheries of the first and second hobs define a filament receiving zone therebetween. A filament extruder including a heating element operated at greater than 48 volts may be provided.

Abstract: A filament straightener, an additive manufacturing machine including a filament straightener, and methods of straightening a filament are provided. The filament straightener includes abase member, a plurality of guide members attached to the base member. The plurality of guide members defines a filament flow path therebetween. The filament flow path extends between an inlet end and an outlet end. The guide members are spaced relative to the filament flow path to cause a filament passing along the filament flow path between the inlet end and the outlet end to experience a plurality of bends to remove curvature memory.

Abstract: An additive and subtractive manufacturing system and method of manufacturing is provided. The system includes a print bed and both an additive machine and a subtractive machine. The additive machine will dispense material onto the print bed and the additive machine will be able to perform subtractive manufacturing on the material dispensed onto the print bed. The additive machine and subtractive machine will be mounted to actuators for moving the machines in three-dimensions within a working zone adjacent the print bed. The system may include placement machines for placing pre-made components in the product during the manufacturing process.