the simplest is just mixing filaments, like one mixes paint. The article doesn't spell out the reason it doesn't work, I am curious as to why.
Plastic flow is laminar, where colour mixing requires turbulence. If you make a turbulent nozzle, it's basically impossible to print reliably with it (the pressure used to push filament out of the nozzle is mostly absorbed/redirect into turbulence).
Thank you for the clear & concise answer. A rotating nozzle and/or alternating colors might work then, but that would be a relatively complex engineering project.
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Plastic flow is laminar, where colour mixing requires turbulence. If you make a turbulent nozzle, it's basically impossible to print reliably with it (the pressure used to push filament out of the nozzle is mostly absorbed/redirect into turbulence).
Thank you for the clear & concise answer. A rotating nozzle and/or alternating colors might work then, but that would be a relatively complex engineering project.