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Nozzle diameter


Question: is there a relation between nozzle diameter and filament diameter? If yes what is the best nozzle diameter for 1.75mm filament ( PLA)?

Topic starter Posted : 14/09/2020 8:09 am
Member Admin

Hello @hunterius_prime

Thank you very much for this interesting question.

The theory behind nozzle design is very complex, but the answer with 3devo's Filament Makers is easy : you can process any diameter you want (between 0.5mm and 3.00mm) with the same nozzle (4mm by default), just by changing the filament thickness value in the menu.

The sensor system continuously calculates the optimal speed to pull the output to the desired thickness. For example, with a 4mm nozzle but a 1.75mm target, the puller mechanism will accelerate until the read diameter is 1.75mm on average. If, after that, you suddenly set 2.85mm in the menu, the puller will simply slow down to stretch the output a little less. After a few minutes, you will obtain some 2.85mm filament.

We also supply other nozzles : 2mm and 3mm. Those can be used when processing materials which are extremely brittle and which cannot be stretched (into 1.75mm and 2.85mm filament respectively). In those cases, the filament almsot comes out of the nozzle with already the right thickness. The downside is that you might have to reduce the throughput.

For 'basic' PLA, I think that a 4mm nozzle is the best choice : you should still be able to pull some nice 1.75mm at a good rate.

Does that help ?
Please let me know if you have any other questions

Best regards,

Posted : 14/09/2020 10:26 am