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smaller and lighter motor due to the short distance to the nozzle. One typical disadvantage of direct-drive extruders is the added mass to the hotend, compared to a typical Bowden extruder, which may cause more vibrations so that the direct-drive printhead has to move slower, which can affect print speed. Another typical disadvantage is more complex maintenance due to tight packaging of many components in the hotend.
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With a direct-drive extruder, the motor pushing the filament is installed by the hotend and pushes the filament directly into the nozzle. Direct-drive designs have several advantages, and typically give better extrusion, faster retraction, are able to print more types of filaments, and can use a
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One disadvantage is that because Bowden extruders push filament through a long and curved tube, more friction must be overcome compared with direct drive extruders. To partially mitigate these friction forces, the tube is made of
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Bowden type extruders are easier to swap since they are outside the print head. They also have less chance of tangling the filament while it unwinds from the spool. Additionally, they reduce the
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Another disadvantage is that the feeding distance is relatively long, and thus the resistance is high, meaning the stepping motor of extrusion is required to have a higher torque.
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On a Bowden design, the feeding mechanism (here indicated with two roller wheels) often sits relatively far away from the hot end part of the extruder.
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device for manufacturing new filament from plastic pellets or recycled filament
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248:"Extruders 101: A crash course on an essential component of your 3D printer"
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Direct-drive extruder vs. Bowden extruder - Guide - 3DJake
International
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is a type of extruder that pushes filament through a long and flexible
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of the extrusion carriage because it doesn't have to hold a
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294:"Comparing Bowden Extruders And Direct Drive Extruders"
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