I keep waiting for these come back in stock, but was curious if anyone has actually been using one and what the feedback was? I didn’t get one fast enough on the first release, but it seems like they were available.
Ive been running the HF nozzles exclusively since I got mine, the standard flow nozzles came out before the first print. Everything works as it should, 600mm/s infill and no problems with TPU stringing or anything else. Im looking forward to the HF 0.6mm nozzles. Was there something specific you wanted to know?
The store page Bambu High Flow Hotend - H2D | Bambu Lab USA Store shows the features as 30% faster and High Speed Precision. Are you seeing 30% faster speeds? I can’t really tell the difference between the pictures they show for the benefits of the high speed precision.
Honestly most of the time when im printing im not trying to set speed records and I am not really focused on print time. You can play with the slicer and get the answer for you specific items. Just switch back and forth from standard and high flow and look at the slice times.
Thanks @maximit . That was really it, just how are they performing in the real world. I print a lot of TPU (the AMS one) so that was great to hear. It sounds like you’re hitting the advertised speeds. Looking forward to getting a set.
Im actually getting less stringing with TPU 95A HF at high speed than I did with my X1 and P1s. Printing TPU right now, and its with lots of small hexagons and its coming off perfect. On the X1/P1 I would have to clean up some loose stringing with a blow torch.
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Thanks. I should just try it out. I accidentally ordered just one at the launch and was waiting until I could order a second one.
Some observations after playing with the slicer. The HF nozzles only speed up materials that have a high flow already like PLA Basic, Bambu ASA etc. I tried adjusting the flow rate manually and it only has an effect on standard flow nozzles. I think when you pick HF nozzles it completely ignores the flow values in filament profiles and overrides it with pre-set value that is currently hidden, I cant find it anywhere to adjust it which is a shame. Also you only get the faster speed with bambu filaments, with generic profiles there is no speed difference. Some are “blacklisted” and HF make zero difference, filaments like TPU, PPA, PPS, PA, GF and CF filaments, things that have a low flow rate.
I hope bambu exposes these HF flow rates to the end user so we can tune them as I think the hot ends are capable of faster speeds, their current HF flow rates are very conservative.
You can bypass this limit but putting the printer into “Sport” or “Ludicrous” mode to push it further, but that can result in print failure with some filaments so keep that in mind. Those modes increase all speed values globally by the 124% and 166% respectively. I used to do this frequently with my Obxidian X1 to push the speeds without adjusting the profiles.
Also I need to mention a big advantage of HF nozzles is not just speed but much better layer adhesion for stronger mechanical parts. I had an E3D Obxidian hot end on my X1 but I printed at normal speeds most of the time as I wanted the best part strength, so dont overlook that big advantage when deciding on if you want to grab them or not. Although if you are making cosmetic items and just want a speed boost, it might not be worth it as the speed difference is not that big.
Video below to explain the layer adhesion advantage:
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That’s great info, thanks! I haven’t loaded the new studio yet but I’ll do that and play with some theoreticals. The adhesion improvements are really compelling.
I’ve been using the HF nozzles from the first calibration of the machine and haven’t done a single print on the standard nozzle. But, I haven’t seen a reason that makes the extra flow worth while yet.
Playing around in the slicer, speed is not a reason to spend $100+ on the two HF nozzles. I don’t think I’ve seen a print time drop because of the HF nozzles. I think the 0.6mm nozzles may see a difference but don’t buy the 0.4 HF nozzles for speed. You’ll be disappointed.
You’ll need to decide if the headroom is useful to you. Also, I assume the the high flow will aid in the changing of the sheen of various filaments. To this day, I haven’t seen that problem. So there is value to the HF nozzles, but speed isn’t one of them. Make your purchase with that in mind.
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Okay, what am I missing here? I loaded the new Studio, added an H2D and brought in one of my more recent prints. Using PLA Basic, and switching between the Standard and High Flow .4 nozzles, I see zero difference in the slicer times or any of the setting in the presets… or any different presets.
Do I need to manually change all of the speeds? I see the drop down under the Filament Setting to switch from Regular to High Flow, but that also seems to do nothing other than change the Max Volumetric under for the filament.
Are you on windows? On my macOS bambu studio the flow rate in the filament profiles does not change with HF nozzle selection.
It only changes the infill speed to 600mm/s and another change in the speed profiles.
You can bump some of the other speeds to increase print speeds.
Be careful in the slicer. It’s not totally user friendly for this type of change. There are a lot of areas that appear to forget the settings. I’m not sure it matters but just look over everything. Below is the Filament profile where there is a HF dialogue box that mine never holds on to. When I update it to High Flow, the volumetric speed bumps up as expected. Again… not sure it matters, but it’s something I check.
Like @maximit mentioned, I’ve only seen changes to the Infill speed. So, again, make sure you are OK with the “improvements” before you hop in. It’s not at all what I expected.
I updated my Bambu Studio and now I have the Standard and High Flow options in filament profiles.
Looks like the HF max flow rates are set identical to standard flow rates for most filaments except PLA Basic. My guess is bambu will update these values eventually but until they do there will be little speed advantage seen with most filaments on standard profiles.
Would be nice if we had a built in max flow rate test in bambu studio like orca does @SupportAssistant
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Got it… the part I was trying before didn’t have much infill. It’s not super intuitive.
It really does look like a pretty marginal difference. These parts seemed like a good real world part with plenty of infill, and timed 2:24 on the Standard, 2:17 on the High Flow, and 2:22 on my X1E (presumably because of the faster accelerations on the X1 machines). PLA Basic, .20mm Standard Profile.
Hopefully Bambu will invest some real time into building out profiles for them, faster inner walls and surfaces could change a lot. I guess I’ll experiment more when I can try it for real.
So, I was finally able to order a pair of them… and reading the product page, I found the details on where they got the 30% improvement from.
2. Tested with PLA Basic, 15% infill, 300x300x300mm cube.
So that makes sense, that model would be ALL infill. To try it, I made one and sliced it… it cut the print time from 59 hours to 22 using all of the standard settings. That’s a whole lot more than 30% faster… but also a totally ridiculous comparison.
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