When will we be able to use 2 different nozzle at the same time?

does anyone got any new concerning this function ? because that is a huge + when printing, having a tiny nozzle for detail, and a big one for speed, lot of talk since march, but now we are in august, can we get an ETA about it ?

Pretty sure they are working on it, but how to actually apply it is very challenging and dynamic. E.g., in which case it should use the second nozzle?

are you asking me ?

i can think of a lot of scenario, like i said in the previous post, the most obvious reason that anyone want to have is to print faster, you get to print the whole structure of your print that doesn’t require lot of detail with a 0.6 or 0.8, like the inside of the print too, then you go to 0.4 or 0.2 for finest detail like text or stuff where a big nozzle isn’t working.

another scenario is for strengh, why do multiple pass for a infill density where you can do fewer but with a bigger nozzle ? you don’t care about the look of it anyway since its inside.

same goes for support, quicker to have one big pass instead of losing time going up slowly

They should try and figure out how prusa does it

I know, but it’s hard to specify exactly which type of lines shall be printed with the second nozzle

One interesting use case for the H2D having different nozzle sizes on the left and right toolhead would be combining high-resolution and high-throughput printing in a single job. For example:

  • Use a 0.4 mm nozzle on the left head to print outer walls and fine detail where surface quality matters.
  • Use a 0.6 mm or 0.8 mm nozzle on the right head to handle infill, support structures, or internal geometry—areas where speed matters more than resolution.

This hybrid setup could significantly reduce print time while still maintaining aesthetic quality on visible surfaces. It’s particularly useful in large, semi-functional prints where structural strength and print time are more important than perfect finish throughout.

However, there are software-level challenges with this approach:

  1. Toolpath planning becomes complex, especially when slicer logic is built on the assumption that both nozzles are identical in diameter and performance characteristics.
  2. Seam placement, wall ordering, and infill overlap must be recalculated per tool, or else you risk under- or over-extrusion where the nozzles switch.
  3. Cooling behavior and retraction settings vary between nozzle sizes, and a mismatch here can cause stringing, blobs, or poor layer bonding.
  4. AMS and material assignments would need to be mapped correctly per toolhead, especially if one nozzle is fed with high-flow filament while the other isn’t.

Currently, Bambu Studio doesn’t offer robust support for mixed nozzle diameters, and most users who’ve tried it end up running into unexpected issues—especially in multi-color or dual-material prints.

Until native slicer support matures, it’s a cool idea with real potential, but not yet practical in most real-world scenarios.

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Yeah. I want to add that, the only ways that a larger nozzle helps are about:

  1. To print a wider line so that you can print less internal walls, when you need more walls than 2 (but more uneven outer wall results)
  2. To print a wider line for 100% solid infills, so that your solid infills would print faster
  3. To print a higher layer height useing infill combination and print walls normally.

The print speed difference would be pretty marginal for most prints, and for the prints that actually benefits a lot on speed from it, you might face even more warping because now you’re pumping out heat much faster than before. unless you’re using fibre filaments.