Below is an excerpt from the Modix website in regards to the filament changeover.
In general, we do not recommend upgrading to 2.85 or 3 mm filament, as you can print significantly faster with 1.75 mm filament over 2.85/3 mm filament. For 1.75 mm filament, the maximum flow rate with the E3D Volcano hotend is around 30 to 35 mm^3/sec. Withe 2.85/3 mm this drops to around 15 to 20 mm^3/sec.
That means that if you print with a 0.8mm nozzle at 0.6mm layer height, you can print this at 60mm/sec with 1.75mm filament, but need to drop down 40mm/sec for 2.85mm
0.80.660 = 28.8 mm^3/sec
0.80.640 = 19.2 mm^3/sec
Advantages of 1.75 mm
- Higher maximum flow rate as 1.75 mm offers a better surface-to-core ratio.
- 1.75mm filament is more flexible and therefore easier for the extruder to pull it through the PTFE tube during printing.
- Larger variety of materials as the 1.75 mm is the market standard.
Advantages of 3 mm Filament (2.85 mm)
- Degrades slower in very humid environments as it gets less moisture inside compared to 1.75mm due to the lower surface area
- Flexible filaments are easier to print with
The Titan Aero extruder is universal and can work with both 3 and 1.75 mm filament. By default, it comes with a 2.85mm guide tube as well but several other parts of the extruder need to be swapped out for it to properly function
The guiding PTFE tubes need to have an inner diameter of 4mm and an outer diameter of 6mm so that you do not increase friction on the filament pathing
Pay attention to the E3D website for the right choice of nozzles and other items.
Please find the links to the E3D online shop below for the parts you need to swap out:
- Titan Aero Individual HeatSink – E3D Online (If you have two extruders, for the secondary extruder you need to get the mirrored version)
- V6 Stainless Steel HeatBreak – E3D Online (You will need to get the 2.85mm version)
- Volcano Nozzles – E3D Online (You will need to get 2.85mm nozzles)
Pay attention to the E3D website for the right choice of nozzles and other items!
Please look at the E3D reseller map for official E3D resellers closer to you: Resellers – E3D Online