Tech Sessions: BCN3D Sigma D25
Independent Dual Extrusion System (IDEX)
Multi-Material & Soluble Support Printing
Dual extrusion is an important feature for professionals looking to 3D print complex shapes, designs with steep overhangs, multi-material parts, and objects with large internal cavities. One of the standout features of the BCN3D lineup is their innovative variation of the dual extrusion system, independent dual extrusion. Pioneered by BCN, the IDEX system is one of the cleanest dual extrusion variations due to the extruders ability to exit the build volume completely, preventing any oozing material or soluble support from making its way into the layers of your other material. Upon re-entry, the nozzles pass over a wiper, scraping off any oozing material and ensuring crisp lines between different materials. Combine this with an Open Filament Format, the D25 provides endless opportunities to innovate.
Duplication & Mirror Modes
Unlike other dual extrusion designs, the IDEX system also provides the ability to print in duplication mode and mirror mode. As you might have guessed, duplication mode enables the Sigma D25 to print multiple of the same part simultaneously. Inversely, extruders can work in opposite directions on the X-axis, creating multiple mirrored designs at the same time. These two features, paired with a massive 420x300x200mm build volume, makes the D25 a perfect 3D printer for improving productivity.
Premium Design & Components
BCN sought to create a high-quality 3D printing experience and delivered it throughout with premium components. From the moment the box arrives at your door, the quality of the Sigma D25 is apparent. The D25’s solid metal body, reinforced X-axis gantry, and large, 5″ full-color touch screen give the 3D printer a premium feel. The extrusion system features components from two of the best-in-the-business, e3D™ Hotends and Bondtech™ Extruders. Paired with filament runout sensors and a repositioned extrusion system, the D25 delivers exceptional single and multi-material 3D prints.

Improved Calibration & Operation
On setup, a large 5″ multi-lingual touchscreen guides you through the entire process, from calibrating the bed and extruders to loading filament. In addition, the BCN D25 comes with a WiFi dongle for a connected workflow. Easily upgrade to the newest firmware and manage print jobs directly from your desk. While some may scratch their heads at the use of a dongle, others may find this useful. Especially when your organization does not permit network connected hardware.
Final Thoughts
BCN has stepped-up their game, delivering a high-quality independent dual extrusion 3D printing experience with a massive build volume (Wow! That’s a mouthful). Furthermore, the Sigma D25 wraps all of this in a sturdy, gorgeous looking 3D printer that will have you wanting to place this front and center in your office. If you are looking to print large single parts or increase your 3D printing productivity, this printer is for you. If you like these features but need something bigger, check out BCN’s new Epsilon W27 and Epsilon W50.