So many questions. Hardened or regular steel? Nozzle size? % increase in speed to head failure compared to other materials? Pure CF or blend?
Shengzu ASA+CF. Not sure but I think around 30% CF. I've printed many other CF blends without issues.
These claimed to be hardened steel, but they were amazon specials. So weird. 0.4mm nozzles print speeds from 50mm/s to 200mm/s.
Carbon fiber is harder than even hardened steel, so really if you want something that's not going to wear out, you need something even harder. Diamond, ruby (sapphire), or tungsten carbide are the go-to materials.
tungsten carbide
Are they a thing on pro equipment? I was thinking they would be.
I've got a solid carbide nozzle on my ender-6. There's a store on AliExpress that sells them for like $50.
Bit steep for a nozzle, but you'll only ever need to buy one.
Gemstone- or carbide-tipped brass or copper or steel nozzles are available even cheaper, but I prefer the monolithic approach. If I ever get a clog that a cold-pull won't solve, I can just torch the nozzle red hot to burn out whatever the clog was, without affecting the mechanical properties at all.
You can always be ripped off in a tool you buy. But if it was cheaper than that I would not trust it to be what it says it is.
Carbon fiber is not harder then hardend steel. The carbon fiber chop is abrasive and slowly scrapes away metal.
Most alternate materials are have some issues with manufacturing tolerances and cost. The metal nozzle has better heat transfer properties.
The general recommendations was to treat nozzle as consumables and change it every 3-4 kg of carbon fiber reinforced material. If you can get a brass nozzle with a hardened A2 or D2 insert, it will give you the best bang for your buck.
Carbon fiber is not harder then hardend steel. The carbon fiber chop is abrasive and slowly scrapes away metal.
If it's not harder, how can it abrade away the steel?
The metal nozzle has better heat transfer properties.
Tungsten carbide (cemented with cobalt) has thermal conductivity close to that of brass. Roughly 3.5x better than steel, and 7-10x better than stainless.
How come water erodes stone?
Because it's carrying more stone particles suspended in it (sand).
And velocity of those particles, and the pressure of the water pressing them against the rocks. You can also accelerate water so high that it will cut thru steel. To be fair, the scales are all over the place, brass nozzle wearing down in 6 months vs stone being eroded during thousands of years and more.
You can also accelerate water so high that it will cut thru steel.
You do know that commercial waterjet cutters use garnet particles in the water jet to cut steel, right?
Yes, a sufficiently energetic jet of pure water will erode steel, but it's really, really, really slow without some kind of abrasive.
Jesus the third one looks like you got your moneys worth alright
So many nozzle posts today, must be a sign to change mine.
Damn that 3rd one is completely worn down. Like a hotdog in a hallway
That’s not how nozzle wear works.. this is from over aggressive nozzle wiping g.code, z distance from bed too close, ironing at super high speeds, and layer heights not supported by the nozzle geometry.
How would an abrasive filament sand the OUTSIDE edge of the nozzle flat?
because molten filament is squished between the nozzle and print surface. CNC Kitchen did a very informative video on this https://youtu.be/uvlMeTnjriQ
So why isn’t the center bored out?
Because there is a larger contact patch that touches filament on the bottom then inside the middle. The heads of nozzles wear out much faster than the center, which is why most specialty nozzles are tipped and then made from a softer metal. Both parts wear, but just the bottom wears faster. The video I linked explains everything.
Still wrong. The volume flowed is directly relative to the nozzle outputting it, because it output it.
What you see is consistent with regular nozzle wear, it just happened very fast because of abrasive filament.
Now ask yourself: why would OP wear out their nozzles deliberately? Internet points?
I never said that. I said they’re misunderstanding why their nozzle is being abraded so fast.
Haha I have an answer for you there....
Turns out there was an ID10T error setting slicer params. Was trying to print at 500mm/s instead of 50mm/s and never realized it. Normally on the E5S1 I print 200-300mm/s most materials. Print at normal speed still has noticeable wear of about 0.04mm/print on Z adjustment needed.
Its not about volume, its about surface area. The linked video explains everything and goes through a full testing methodology.
Comment didn't go with this, but here's two prints. Brass nozzle and steel nozzle. You can see under extrusion on both, moreso in brass, as part progresses.
Wow, that nozzle wear on the third one is insane.