E3D Hemera - formerly Hermes - is the best extrusion system we’ve ever made. It combines our market-leading V6 HotEnd with an all-new filament drive to form a highly responsive direct drive extrusion system - providing unrivaled performance with flexible filaments. Dual-Drive: For E3D Hemera, we opted for a hardened stainless-steel dual-drive arrangement which provides a huge boost in grip over single drive systems, in fact, we’re able to push filament with up to 10kg of force. The secondary gear shaft is on a movable, sprung idler which allows the user to adjust filament tension. Compact, Integrated System: Hemera is a system of components designed to work seamlessly together as a single compact product. It has a custom motor which is based on a NEMA17, along with our own faceplate designs which has allowed us to add our own features for user convenience, such as mounting slots as well as produce a very compact system. Filament Constraint Like No Other: Hemera constrains filament like no other extrusion system, fact. You won’t experience the full extent of its unrivaled filament constraint until you print ultra-flexible materials. This exceptional filament constraint also has a significant impact on printing rigid, and semi-rigid materials such as PLA or Nylon. Mounting: Hemera features convenient T-Slots for easy mounting to your printer, plus space for other accessories, part cooling fans and bed leveling probes to name a couple. A Never-Before-Seen Heatsink: Hemera’ heatsink design ensures airflow is diverted up and away from both the HotEnd and the heated bed, reducing the risk of warping and uneven stresses forming in the printed part. User-Centered Design: All interaction with Hemera is from the top. To set filament tension the user simply twists a thumbscrew and a cam slider mechanism with a captive nut compresses a spring and loads the idler. Filament tension is increased by rotating clockwise and decreased by rotating counterclockwise. Simple.