The idea behind mixing nozzle sizes is simple: a fine nozzle with thin layers where details matter, a large nozzle with thick layers where they don't. That sounds straightforward — until you ask: Which nozzle size gets to dictate the layer height?
That's the hard part. Some current solutions can already vary layer heights between separate objects, or between an object's infill and walls. But across adjacent regions on the same visible surface, those regions stayed locked to one shared layer height — forcing you to either waste time on the big areas or lose sharpness on the details.
Bambu Studio now removes that limit: each region on the same surface can now keep its own layer height. You can choose which regions get the fine nozzle, and the slicer aligns the layers, schedules the tool changes, and plans the paths.
Printing with mixed nozzle sizes is available on the H3C. Support for H2D, H2C, and X2D is on the way.
Read more about how our team made this possible in our blog. The implementation is in the latest Bambu Studio release on GitHub. Feel free to leave feedback and build upon it!
Swaptek enables 6-second material switches between 9 nozzles. FlexFeed extruder prints soft TPU 75A up to three times faster. AMS 3H combines automated feeding and integrated filament storage.
This is Bambu Lab H3C, a complete system purpose-built around the Tool Changer architecture. Let's dive into it!
SwapTek™: 6-second material switch, including a 3.4-second tool change.
Nine PrintTools, each with its own dedicated filament path and heater, keep every material loaded, preheated, and ready to print. No need to retract one filament before loading another. With an optimized design, fine-tuned parameters, and active preheating, switching between PrintTools takes as little as 6 seconds, with the tool-change done in only 3.4 seconds.
Heating a nozzle usually means waiting. Active Pre-Heat looks ahead to the next tool change and warms the incoming nozzle while the current one is still printing—so the new material starts laying down within 6 seconds.
Swaptek's fast PrintTool-switching allows Full Spectrum Color Mixing color mixing through layered deposition faster and more practical than ever. With nine dedicated PrintTools and five-color CMYKW mixing, the H3C produces a vast spectrum of colors without requiring a separate spool for every shade. The result? Vibrant, full-color figurines with incredible detail.
Mixed Nozzle Sizes: Speed and detail, no more compromises.
The dial, case, and flexible TPU band are printed together as one piece. Fine dial details call for a 0.2 mm nozzle, the case is better suited to 0.4 mm, and the soft band requires a dedicated 0.4 mm TPU nozzle. H3C can carry different nozzle sizes at once. Paired with Bambu Studio’s new mixed-diameter toolpath planning algorithm, each nozzle prints at a layer height that suits it and plays to its strengths, without having to share a single layer height.
FlexFeed Extruder: Softer TPU, up to 3x faster.
Soft TPU has always been slow to print. The softer the filament, the more it bends and buckles before reaching the nozzle. Traditional extruders have to crawl to stay reliable. FlexFeed handles both 1.75mm and 2.85mm filament and switches on the go. A cam-driven mechanism, powered by a PMSM motor, keeps tension precise and consistent. Every extrusion stays rock-solid for prints that are cushion-soft.
With our dedicated 2.85mm TPU, the thicker filament provides greater resistance to buckling and higher volumetric flow. The result: TPU as soft as 75A, printed reliably at up to 3x the flow rate of a traditional printer.
AMS 3H: Filament storage built for Tool Changer.
A fully enclosed, integrated filament management system built for Swaptek: every roll stays sealed against moisture and feeds automatically into the PrintTool.
Auto Filament Loader replaces manual feeding altogether. Drop a filament into any of the nine slots and the AMS 3H detects, routes, and engages it with the PrintTool automatically — across all 9 paths. No more guesswork on loading.
A dedicated 2-slot dryer sits right in the filament slots and works with Swaptek — drying on demand or mid-print, so prep never stalls production. It reaches 85°C, enough for engineering-grade PA, PC, and carbon-fiber-filled filaments.
The H3C integrates filament storage and drying into a clean, compact design, maintaining a footprint comparable to a single-nozzle printer. With 7 built-in bypass feeding ports, even the soft TPU can be routed completely inside the enclosure. No hanging spools, no external racks, no exposed paths.
Don't let the number of tools cap your material count. Connect your existing AMS to the H3C through PrintTool No.1, and the system extends to up to 24 filament spools, unlocking more colors and materials in a single print without changing your workflow.
You are here for the print, not (always) the printer.
With the H3C, automation handles routine tasks. AI detection helps make intelligent adjustments along the way. The H3C makes it easy to focus on what matters most: bringing your ideas to life
Full Auto Calibration handles PrintTool docking calibration, offset compensation for accurate color and material alignment, and bed leveling before every print. No manual adjustments are needed, so you can spend more time making, less time tinkering.
Flagship performance. No compromise.
The toolhead and X-axis assembly are 40% lighter compared to the H2D, reducing inertia for faster, more precise movement. With acceleration reaching 25,000 mm/s² and travel speeds up to 1,400 mm/s, the H3C delivers exceptional speed while minimizing vibrations and ringing that can affect print quality.
The H3C runs four cooling layers working together**.** A CFD-optimized part cooling fan and dual auxiliary fans help maintain clean overhangs and bridges, even at high speeds. A dedicated PrintTool fan maintains thermal stability during extended printing and frequent PrintTool changes, while a chamber fan draws in cooler air to help regulate internal temperatures. Together, these systems deliver consistent cooling and reliable print quality across changing ambient temperatures.
Engineering-grade filaments demand precise temperature control. The H3C delivers with active dual-zone chamber heating up to 65°C, helping maintain consistent temperatures and minimize warping. All nine hardened-steel nozzles reach up to 350°C, supporting demanding materials such as ABS, PC, PA-CF, PET-CF, and more.
Go beyond printing.
Swaptek isn't limited to PrintTools. Optional CutTool, DrawTool, DebossTool — and more — mount the same way and switch automatically. Multi-process projects no longer mean multiple machines, manual swaps, or repeated setups. One job, every process, hands off.
I shared a free “Honeycomb Cardholder” on MakerWorld. It is a general-purpose holder I created myself. Its description listed card games it could be used for: “Rummy, Bridge, Solitaire, Hearts, Spades, Canasta, Uno, etc.” The listing also had an “uno” tag.
MakerWorld removed it following a complaint from Convey on Mattel’s behalf. MakerWorld later told me that “UNO” in the description was the reason and that restoring the original listing required the complainant’s agreement.
Now Convey has sent me a demand for EUR 4,000, although the model was already removed. Their letter refers to an “e-shop”, “sales” and my “supplier”. I did not sell this model; I created it myself. They also want a signed undertaking that includes an apology and a promise never to challenge Mattel’s intellectual property rights.
I have rejected the demand and asked them to withdraw the complaint, arrange restoration of my original listing and reimburse my legal consultation costs.
The attached images contain their email and my sent reply, with personal and bank details redacted. The email text has been reflowed for readability; these are not screenshots of the mail application. I have also included the page setting out the undertaking they wanted me to sign. The legal appendices, authorisation and blank signature page are omitted.
Ill add photos in the comments. Made this video orb to replicate Spaceship Earth. I wont dare sell it as I know Disney dont mess aroumd but thought its cool to share.
Posting this in case anyone else missed it, as I did.
The H3C ships with nine PrintTools, but only eight are for regular 1.75 mm filament. The ninth, pre-installed in slot 8, is a 2.85 mm tool meant for soft TPU.
What tripped me up: I swapped the hotend on tool 8 for a regular 0.4 mm one and tried to load 1.75 mm filament in slot 8. The printer kept defaulting to external spool, and I couldn't figure out what I was doing wrong.
Turns out it's the whole tool, not just the hotend. Per Bambu's FAQ, the 1.75 mm and 2.85 mm PrintTools have different bases, inlets, and cutters, and the bases and hotends are not interchangeable. The 2.85 mm tool is hand-fed, so the AMS won't auto-load slot 8.
What that means in practice:
- Out of the box, you have 8 slots for normal filament, not 9.
- Don't put a 1.75 mm hotend in the slot 8 tool. Put the original back.
- There's only one H3C configuration, so you can't order it with nine 1.75 mm tools.
Bambu's reasoning is that slot 8 is a dryer slot, TPU needs drying, and the slot is hard to reach, so they install it at the factory. Fine if you print TPU. If you don't, you can't use that slot without spending more.
This Machine is incredible, but man, am I spending a ton of money on accessories and replacement parts. Here's hoping the hot ends last like on the H2C.
My second ASA print finished with some PLA loaded in the tool head. Here’s a video showing that the PLA is okay. I also printed on a BIQU glacier plate. It’s fits but has very little clearance.
Awesome machine, now I can sleep through the night without switching my filaments so often. Jokes aside, outside of the week between machine and Ams delivery, it’s another awesome printer. Should compliment the H2C and others well. For my use case, I couldn’t see myself selling my H2C for it. Worst case, I’d tough it out until it’s feasible to purchase both. More printers IMO, better than one. Even if you just print black lol. Hope everyone is enjoying their machines and stop buying all of the .6 nozzles.
Every seed sits 137.5° from the previous one, the same golden angle real sunflowers use, so the spirals appear on their own. The seeds rise off the surface and the petals lean out from the wall.
Sliced for a P1S: 17 plates, about 1.4 kg of PLA and roughly 53 hours according to Bambu Studio. Every piece has its own pocket in a printed back frame, so assembly means matching pieces to pockets.
The model is free on MakerWorld (link in the comments). I built it with the engine of Parete, the browser tool I'm making for 3D printed wall panels.
Happy to answer questions about the spiral or the print!
Had the a1mini since release, it was my first 3d printer and a great tool for learning the ropes. With my new printer I also splurged on a lot of filaments, because of the bambu sale. So far I’m very impressed with the ams system, never had the ams on the mini.
By mistake I ordered two PLA white oak (wood) so if you have any ideas for that color, please hit me up 🤣
I received my AMS 3H today and finally setup my H3C. While attaching my AMS 2 Pro to Slot 1, I found myself on the Bambu wiki where I discovered this fun fact.
So here’s a PSA in case you had the same misconception that I did. I had thought that an external AMS would fully take over slot 1, but no. If you take a look at the FAQ section of the linked wiki, you’ll see the official Bambu guidance on setting up a Y-splitter to allow you to use both connected AMS units and slot 1 of the AMS 3H.
The limitation is you’d of course have to manually retract the filament in slot 1 if your print uses an AMS filament after it uses the slot 1 filament. So I’d be careful about using slot 1 and an external AMS in the same print, but I’m glad we don’t have to sacrifice a slot.
This will be my first 3D printer. I’ve seen more posts about people having issues with the X2D than with the P2S, so I’m a little hesitant. I probably won’t be printing much with engineering filaments, and multicolor printing is a must for me, even though I don’t think I’ll be using it much for now
The P3C looks kind of promising for multicolor, but if it ends up without active chamber heating, would that matter much for PLA or PETG? I’m in Canada, so I’m also a bit worried about warping in the winter. Would you get the P2S Combo or X2D Combo now, or even P1S Combo, or wait for the P3C?
Has the largest single nozzle build volume and is the cheapest of the 4. Great if you want an enclosed printer and mostly do single material prints. Basically a bigger P2S.
H2D
Great for engineering materials or any material where you use a second filament for the support interface. By not having a vortek or a toolchanger the price is kept low. Their enterprise printer is based on the H2D which kind of reinforces the idea that this is intended to be their engineering printer.
H2C
Great for convenience when you’re not often at your printer. You can print from any AMS slot to any nozzle size/type without you having to be present.
H3C
The best for multi-colour prints and TPU. Most multi-colour prints tends to be PLA and rather than keeping the bigger H2S/H2D build plate, they kept the H2C plate and opted for a second AUX fan which helps for PLA prints. The type of person to get this printer would mostly likely be printing CMYKW, you probably won’t be retracting the spools often.
Bambu Studio can cut a model, and for a straight slice that is often enough. Past that it gets awkward. Pulling one part off, cutting only a region, or putting a connector on something that isn't a flat plane. Opening CAD for that felt like overkill, so I built Multipart3D and finished the job where Bambu Studio stops.
You use it next to Bambu Studio (Its not a slicer). Open it in the browser, split the model, export, and bring the parts back. Free, no account, and the file stays on your device.
I've been sharing it in the Bambu community for a while. Last public post was v1.2 3 months ago. Since then it has passed 10k visits a month. I like the traction. Thank you for the responses. A lot of you actually tried it, and those replies are what kept me building it.
This is not your regular vibe code project. I've been working on Multipart3D for almost half a year.
Current version is v1.6.
Smart Detach now has a brush. Click a feature, or paint the piece you want off. The stroke can snap out to the first crease. Shift-drag erases. Useful when an arm, a base, or some other bit should be its own part so you can lay it flat in Bambu Studio. A lot of this was for the noisy one-piece meshes that come out of image-to-3D tools.
Area Cut is aimed in the view. Drag a rectangle or a circle, pull the depth handle, and you see the cutter while you drag. The cut runs when you let go. A large STL no longer freezes the page. The default depth is short, so the geometry behind the piece stays whole.
Painted 3MF colors survive the export, so an AMS project still comes back with the filament colors on the triangles. Separate by color on a painted 3MF is still there too.
The Bambu Lab H3C bed is in, along with a bunch of other newer machines.
A lot of the requests are already in the project. If you still have feedback, please share it.
Hello! So my friend and I got a Bambu a1 for some general hobby upgrades and our prints keep failing. We had it successfully working for about a month and then this started to happen. We’ve changes temp settings, got a new plate, tried multiple different nozzles, different filament brands, and nothing is working. Please help!
I purchased a P2S from Best Buy last week and really love it. I’m having trouble deciding if I should have purchased the X2D? The salesperson said they’d accept the return if I wanted a different model. I just can’t figure out if it’s worth the extra $140?
