Sigma D25 vs Sigma(x) R19

In the period between the premiere of the Sigma (x) R19 and the Sigma D25, there have been many changes to the BCN3D Epsilon series. Today, many of these improvements are being made to the Sigma series, brought to the series in the form of increased reliability and enhanced user comfort.

One of the biggest changes that has occurred affects the noise level of the printer. The smaller Sigma size was abandoned and the Sigmax R19 3D printer size was selected. After careful consideration, BCN3D concluded that this was a much better working area to take advantage of the IDEX system, with a much larger X-axis compared to the previous Sigma R19.

BCN3D also wanted to provide customers with a cheaper platform that would be optimized for the most commonly used standard materials that are easier and safer for home or office printing. This eliminated the need for specific components that are needed to support technical and composite materials, which had a direct positive effect on the price. For customers looking to use engineering and composite materials, Epsilon's BCN3D series offers these components by default to create high-quality parts out of these more industrial materials.

The main changes made to the Sigma D25 compared to the Sigma (x) R19:

• Work platform and Z axis assembly have been redesigned with several improvements:
• Increased stiffness - more durable thanks to redesigned Z-shaft brackets and lower working platform.

Left: Sigma (x) R19 build platform. Right: Sigma D25 Improved Build Platform.

• Better flatness of the print surface - thanks to the new aluminum platform and improved handguard clamps, the same as the Epsilon BCN3D series.
• Better heat distribution over the print surface - thanks to the use of a new silicone thermal pad instead of the PCB heater, elimination of the air gap and a new aluminum platform, the same as in the Epsilon BCN3D series. In the picture below, you can see the heat distribution with the new platform, with a slight difference of around 2ºC compared to 20ºC with the previous Sigmax R19.

• Improved leveling procedure - with an adjustment accuracy of 30 microns and more ergonomic adjustment screws.
• Easier to assemble and repair - The Sigma D25 is assembled together as its own component, making it more streamlined for maintenance and repair.
• Consolidated parts - same assembly and platform design as Epsilon BCN3D series, as well as other elements of overall architecture.
• Working area - 420 x 300 x 200 mm (25 liters).
• Functionality:
• Standard materials only - optimized to better handle the most common materials: PLA, PETG, TPU and PVA with BCN3D profiles, but still keep the filament system open to allow compatibility with third-party materials.
• 0.4mm and 0.8mm nozzles only - revised to handle the two most used nozzles by customers according to usage data, allowing better use of resources to improve the targeted selection of material profiles.
• Maximum table temperature 80ºC - Thanks to changes in the material offer, it was possible to reduce the cost of components to meet the less demanding requirements of standard materials.
• No additions are required - Thanks to changes in the material offer, it was possible to eliminate the need for additional elements, such as housing and filtering
• Electronics has been modified to improve stability, functionality and UX to reflect the improvements made to the BCN3D Epsilon:
• Larger 5 inch touchscreen - for more convenient use as in the Epsilon BCN3D series.
• Improved UI menu - more intuitive menu and UX, with multi-language support like the Epsilon BCN3D series.
• Connectivity feature added - The Sigma D25 can now print over the network via WiFi or Ethernet, direct from BCN3D Cura or BCN3D Cloud.
• BCN3D Cloud Integration - the user can now also manage multiple printers, print jobs and view printing statistics as well as printer configuration via the BCN3D Cloud interface.

• Software updates via wireless network - thanks to additional connectivity features.
• Updated calibration process - with optimized software calculations.
• Software / Firmware - general improvements.
• Extrusion System:
• Improved filament loading - the filament sensor design has been improved to eliminate problems during the loading process.
• Improved printing profiles - overall improvement of printing profiles and significant advances in printing from PLA.
• Easier maintenance - extruders have been moved to the back of the printer for easy maintenance.
• Improved X axis mounting:
• Reinforced X-axis rail - now made of reinforced stainless steel instead of aluminum, same as the Epsilon BCN3D series.

• New engines - changed to NEMA17 motors instead of NEMA14 motors which were prone to overheating.
• Easier assembly - Whole axle improvements to greatly improve ease of assembly.
• Aesthetics:
• Aluminum frame - thanks to changes to improved electronics and a reinforced Z axis.
• New appearance in light gray - to stand out from the growing portfolio of BCN3D products and create a more unique look for the future of the Sigma line

The BCN3D Sigma D25 3D printer presents significant changes from its predecessor, the Sigma / x R19, both inside and out, with an improved user experience, reliability and reformed 3D printing in mind.