Any info on whether the new hot end is a higher flow design?
I love my prusas (I have 6 running all day). Recently I got a Bambu, and I knew that Prusa would be coming out with something more advanced soon. Unfortunately, the one thing I didn't see mentioned, which in my opinion is SUPER important, is the hot end flow.
Having a fast printer is wonderful, but speed doesn't matter if you can't melt the plastic fast enough. My Bambu gets prints finished in about half the time of my Prusas, not just because it races around the print bed, but because the hot end can melt way more plastic before becoming a bottleneck. If you're printing dragons and other things with fine layer heights, this may never be an issue. If you're printing structural parts with big layer heights, or using bigger nozzles, speed isn't the limiting factor.
So, has Prusa said anything about the flow of their new hot end design? Is it comparable with an E6?
RE: Any info on whether the new hot end is a higher flow design?
It was mentioned with the nextruder for the XL, which seams to use the same nozzle/heater design. It has the same size melt zone as a volcano hot-end, so yes, almost certainly will be capable of higher flow. Just look at the sub-20 minute benchy they printed. it doesn't look like it suffered any under extrusion at all.
RE: Any info on whether the new hot end is a higher flow design?
Thanks for that info. I find that the Benchy isn't a great way to show the capability of a hot end, since you don't actually have to melt that much plastic. I believe even at 20 minutes, a standard benchy would need a volumetric flow of around 8-10mm/s, which a standard hot end can do. Having a similar capability as a volcano in terms of volumetric flow would certainly be a big improvement.
It was mentioned with the nextruder for the XL, which seams to use the same nozzle/heater design. It has the same size melt zone as a volcano hot-end, so yes, almost certainly will be capable of higher flow. Just look at the sub-20 minute benchy they printed. it doesn't look like it suffered any under extrusion at all.
RE: Any info on whether the new hot end is a higher flow design?
Im also interested in this.
I want to use CHT nozzles anyway (love them) , but we need to know how much mm3 is capable the new hotend and extruder.
Stephan from CNCkitchen will test it for sure (he has a good method an lots of excels with data from different extruders and hotends)
RE: Any info on whether the new hot end is a higher flow design?
Watch this
Short summary: MK4 hotend/nozzle doesn't have any better flow capabilities.
RE: Any info on whether the new hot end is a higher flow design?
This is a bummer. For people printing dragons, or other intricate pieces, I don't know how much this will matter, but for those of us printing larger parts that are simpler in geometry, the lack of a high flow hot end really limits what can be done. I'm going to wait on getting one (or six) until they have their high flow system available.
RE: Any info on whether the new hot end is a higher flow design?
I'm also interested in the flow capability of the stock nozzle. I know I can use CHT with an adapter, which can reach almost 40mm3/s with ease, so if the stock nozzle can't achieve at least 30mm3/s I hope the adapters for standard V6 nozzles will be available when kits are available, because I would want them immediatelly.
For shorter print time, the primary bottleneck is hotend flow (I can easily achieve 40mm3/s on an old MK2 with CHT, if I don't need any fine details). Fast XY speed is important if you want fine details AND short print time (and Input Shaping is important to also keep the quality). So, if MK4 will eventually have Input Shaping, then high flow hotend is a must.
RE: Any info on whether the new hot end is a higher flow design?
I didn't have great luck with my cht nozzle, but I think some of that wasn't the nozzles fault, but the slow movement of the printer between different objects on the print bed. Once high flow options are available, either with the adapters or their own design, this printer is hopefully going to be fantastic. Unfortunately, I have a feeling the MK4 is going to get a certain amount of bad initial press because the hot end will limit it's output. It's not just the movement speed that allows for faster printing, but the flow rate as well. I'm looking forward to seeing this new machine really push out some plastic.
RE: Any info on whether the new hot end is a higher flow design?
it seems adapters will be available next week (for use with cht, e3d, xnozzle, etc) , please see the thomas shandler last video.
RE: Any info on whether the new hot end is a higher flow design?
In stock!
https://www.prusa3d.com/product/nextruder-v6-nozzle-adapter/
RE: Any info on whether the new hot end is a higher flow design?
Watch this
Short summary: MK4 hotend/nozzle doesn't have any better flow capabilities.
Your short summary completely left out that JP said they have a high flow solution in the works and he thinks they will double the output of their printer farm once all their printers are swapped to MK4s with the high flow hot end.
RE: Any info on whether the new hot end is a higher flow design?
I think it's great they have a high flow design coming, and adapters for CHT nozzles. It just feels weird to me that this wasn't the default, if speed is one of the selling points. For what I'm printing, I'm already at the limit of what an E6 hot end design will let me do, so if I were to get a stock MK4, it wouldn't actually make my print times much shorter. I'm familiar enough with printers to understand how this all works, but I worry that people who are new to the hobby will get one and then have bad feelings because it won't keep up. Maybe I'm wrong, and maybe this doesn't effect as many people as I think, but it seems from the discussion I read with Bambu owners that the high flow hot end is a key feature of a fast printer.
Watch this
Short summary: MK4 hotend/nozzle doesn't have any better flow capabilities.
Your short summary completely left out that JP said they have a high flow solution in the works and he thinks they will double the output of their printer farm once all their printers are swapped to MK4s with the high flow hot end.
RE: Any info on whether the new hot end is a higher flow design?
That's awesome that they got this out right away, definitely makes the printer more usable for us who need higher flow and can use a CHT nozzle.
In stock!
https://www.prusa3d.com/product/nextruder-v6-nozzle-adapter/
RE: Any info on whether the new hot end is a higher flow design?
That's awesome that they got this out right away, definitely makes the printer more usable for us who need higher flow and can use a CHT nozzle.
In stock!
https://www.prusa3d.com/product/nextruder-v6-nozzle-adapter/
Would like to see the nozzles themselves become available too!
RE: Any info on whether the new hot end is a higher flow design?
I'd like to buy more hotends (heat block with heater and thermistor) beside the adapters, so that I can attach various nozzles in advance (CHT, hardened, 0.25mm) and have them ready to swap in a minute.
Since the cable management is improved in MK4, it's easier to get the printer operational quickly in the case of e.g. thermistor wire damage. And if you have multiple hotends on hand, you won't have any downtime with the machine.
RE: Any info on whether the new hot end is a higher flow design?
That's my plan as well. I've ordered two adapters. I'll keep them equipped with my most common nozzles.
I'd like to buy more hotends (heat block with heater and thermistor) beside the adapters, so that I can attach various nozzles in advance (CHT, hardened, 0.25mm) and have them ready to swap in a minute.
Since the cable management is improved in MK4, it's easier to get the printer operational quickly in the case of e.g. thermistor wire damage. And if you have multiple hotends on hand, you won't have any downtime with the machine.
RE: Any info on whether the new hot end is a higher flow design?
are they available now? THANKS!
I can not see them (waiting for purchase the mk4 kit) .
That's my plan as well. I've ordered two adapters. I'll keep them equipped with my most common nozzles.
I'd like to buy more hotends (heat block with heater and thermistor) beside the adapters, so that I can attach various nozzles in advance (CHT, hardened, 0.25mm) and have them ready to swap in a minute.
Since the cable management is improved in MK4, it's easier to get the printer operational quickly in the case of e.g. thermistor wire damage. And if you have multiple hotends on hand, you won't have any downtime with the machine.
RE: Any info on whether the new hot end is a higher flow design?
30 bones, sheesh! Shoulda gave them for free for all the early MK4 guinea pigs 😛
In stock!
https://www.prusa3d.com/product/nextruder-v6-nozzle-adapter/
RE: Any info on whether the new hot end is a higher flow design?
Well, it is a heatbreak after all. My titanium V6 one cost me 40eur, so this price doesn't surprise me that much 😜
30 bones, sheesh! Shoulda gave them for free for all the early MK4 guinea pigs 😛
In stock!
https://www.prusa3d.com/product/nextruder-v6-nozzle-adapter/
RE: Any info on whether the new hot end is a higher flow design?
Well, it is a heatbreak after all. My titanium V6 one cost me 40eur, so this price doesn't surprise me that much 😜
30 bones, sheesh! Shoulda gave them for free for all the early MK4 guinea pigs 😛
In stock!
https://www.prusa3d.com/product/nextruder-v6-nozzle-adapter/
I'll wait for aftermarket parts. Anything I buy from Prusa is stupid expensive after shipping and import duty taxes. I don't remember ever having to pay import duty on previous purchases from Prusa but this time they tacked on another $55 for the printer. The shipping is already very very expensive so that was a real disappointment.