3Dprinting filaments. 1.75mm vs 2.85 mm
In the world of FDM 3D printing filaments there are two predominant formats when choosing our 3D filament and thus our printer. Currently, the format is this imposing 1.75mm to 2.85. But what are the main differences? What filament should I choose?
In general a filament of 1.75mm will give more quality when printing with small nozzles (0.1mm-0.4mm) due to the lower pressure is created in the nozzle which allows us to more precisely control the filament extrusion . The opposite happens when we use large nozzles as a strand of 1.75mm may fall short when it comes to exert enough force to extrusion is correct. Anyway, all this can be corrected in the slicer ajustanto the multiplier extrusion.
As we said before, the filament of 1.75mm is more popular than the filament of 2.85mm, however are less affected by manufacturing tolerances filament. The standard tolerance we handle all manufacturers usually 0.05mm . You know that the slicer performs all calculations with reference to the filament will at all times 1.75mm.Entonces How does this tolerance impression?
In a filament of 1.75mm 0.05mm maximum tolerance is a 2.85% of the total diameter while one of 2.85mm, 1.75% . This means that the manufacturing tolerance affects one 1.1% less in the filaments of 2.85 mm. This translates intoless problems over and under extrusion, provided that the manufacturer tolerances filament respects as does 3Dfils.
As for flexible materials , it is much easier to print with a strand of 2.85mm. because its larger diameter will make it more difficult for the filament is wound in the extruders although not prepared for printing purposes flexible. In addition it is also easier to work with printers flexible bowden if the filament type is 2.85mm in diameter.
As for the printing speed there are certain aspects that we must consider. It is true that because of the greater force that can exert a filament of 2.85mm can be extruded faster, but because the overall superfcie is less contact with the fuser head temperature or require more longer than the filament 1.75mm .
To explain this , let's assume that we want to melt 1 mm ^ 3 filament for 3D printing, this means that we melt 0.15mm of a filament of 2.85 and 0.41mm filament 1.75. Calculating the lateral area of the filament, which is to be in contact with the walls of the fuser, we see that the contact superfice 2.85mm filament is 1.27mm2 while the 1.75mm is 2.21mm2. Ie we have a 74% more surface contact with the fuser head.
But What these numbers translate? If you want to print fast the filament must pass through the fuser also fast 3D printer, ie the contact time of the filament with the fuser will be short. Therefore, at the same temperature, how much more contact area per volume melt before our filament. It is true that we can increase the printing temperature, but it is never advisable to subject a material at higher temperatures than those recommended by the manufacturer as this can cause other problems such as material degradation, drip nozzle, etc.
Therefore, we can conclude the following:
• More popular, more variety of materials available.
• Increased accuracy when printing
• Extruders less powerful
• Best performance with bigger nozzles
• Works better for flexible materials
• Less afected by manufacter tolerances
See you printing!