High Flow Nozzle plugged with wood filament.
I used Prusa Linden Wood Filament in a CHF brass nozzle. It plugged it. I don't know if this is a rare situation or expected. It worked for about 2 hours then plugged. It cooked for about an hour before I found the plug. A cold pull isn't working, the wood fill may be too week to hold. Even trying standard PLA for a cold pull isn't grabing the wood fill plug. Trying to push the filament through by force isn't working eiter. Looking at the Filament description it states a "standard brass" .4 nozzle. No warning about a CHF or high flow nozzles. I have put 2 kg of Prusa Wood fill through standard nozzles.
On the parts pages the E3D High flow Brass nozzle does not mention filled filaments. The E3D Obxidian High Flow nozzle does mention CF filled filaments. Maybe the wood fill is a unique problem.
Live and learn. Unless I find otherwise, I am staying with non-filled filament for a brass CHF nozzle from now on.
RE:
Yeah, don’t do that. Don’t run wood, carbon fiber, glitter, or anything else with foreign particles through a high flow nozzle. The high flow nozzles increase the internal heating surface area by splitting the flow path into multiple branches (usually four) that reconverge just before the exit. The problem is that each of the separate branches are narrower than the standard flow path and therefore more susceptible to clogging. One of the branches may clog and the printer might still mostly print okay, but with some under-extrusion. But when two or more branches get clogged, it’s over. You MIGHT be able to unclog with a cold pull, but may end up trashing the nozzle. I use a 0.4mm Standard Obxidian nozzle for anything with particulates.
MK4S/MMU3
RE: High Flow Nozzle plugged with wood filament.
Yeah, don’t do that. Don’t run wood, carbon fiber, glitter, or anything else with foreign particles through a high flow nozzle. The high flow nozzles increase the internal heating surface area by splitting the flow path into multiple branches (usually four) that reconverge just before the exit. The problem is that each of the separate branches are narrower than the standard flow path and therefore more susceptible to clogging. One of the branches may clog and the printer might still mostly print okay, but with some under-extrusion. But when two or more branches get clogged, it’s over. You MIGHT be able to unclog with a cold pull, but may end up trashing the nozzle. I use a 0.4mm Standard Obxidian nozzle for anything with particulates.
Agreed, that's why I was scratching my head as to why they make the Obxidian nozzles in high flow versions. Seems pointless.
I use the non high flow Obxidian nozzles
RE: High Flow Nozzle plugged with wood filament.
I don't understand why they don't put a warning on the product page as HF is now shipped as default.
Formerly known on this forum as @fuchsr -- https://foxrun3d.com/