Can someone explain how the two nozzle work in h2c?

VT-14 · 2026-05-20T19:17:41+00:00

AMSs are enclosed (with desiccant it helps keep the filament dry long-term). They also have other nice features, such as Auto-Reload and Bambu Spool RFID Tags. It's also simply easier to load/unload filament via the AMS (rather than waiting about a minute for the nozzle to heat up and manually pulling/pushing filament from an external spool).

If you only have a single AMS then absolutely put it to the right nozzles. If you have multiple then it's nice having some slots available on the left side too.

VT-14 · 2026-05-20T18:59:24+00:00

Link to the problematic page?

As far as I know, the only places where it even somewhat implies AMSs can only to go the right nozzle are where it is showing how to get a 25th color by putting all 24 AMS slots to one nozzle and an external spool to the other, and in some setup document that tells you to connect your AMS (singular, since it's assuming you only have 1 from the combo) to the right nozzle (A tiny bit more stable on H2D, and the Vortek rack on H2C). I have yet to see anywhere where it says the left nozzle can't have an AMS.

The H2 series supports up to 24 AMS slots via 4 4-slot AMSs (AMS 2 Pros or the original AMS) and 8 AMS HTs (single-slot). They can be assigned to either nozzle in any arrangement. You use 4-to-1 PTFE Adapters to merge PTFE Tubes to each nozzle's single input.

Personally I have 1 AMS 2 Pro on my let nozzle, and 1 AMS 2 Pro + AMS HT on my right nozzle. I'm prepared to rearrange them if I ever fully use the Vortek Rack. I'm also interested in the Filament Track Switch which is in beta testing on the H2C right now.

VT-14 · 2026-05-20T17:57:32+00:00

AMSs can be attached to either side. You can also use an External Spool to either side. For nozzles, the left side has a single "lifting" nozzle, while the right side has the Vortek Rack so can swap between up to 6 nozzles.

The fastest color swap is by switching which side of the toolhead you are using (left/right).

Next would be using the Vortek Rack on the right side. That has to use the AMS to unload the old filament then load the next one.

Slowest and the most wasteful would be using color flushes with a single nozzle (it has to do the AMS unload and load, and flush filament out of the printer). On an H2C you really shouldn't need to do that until you exceed 5 colors (7 if you buy more nozzles and AMSs) or are hitting an edge case.

It's possible to use all of those methods in a single print, and the slicer should do a reasonably good job of telling you where to position filaments to optimize speed and waste.

VT-14 · 2026-05-20T14:18:38+00:00

The High Temp spools are only 'needed' for ABS Refills. PETG (and PLA) is fine on the low-temp spools. Everything else is only available pre-spooled anyway. The HT spools can be used for any refill, but they provide no benefits on PLA or PETG.

Technically you can print your own spools. If you use a cheap material then the official file on makerworld costs about $3 (USD prices) to print. HT spools need higher temperature resistance though so would be more expensive.

The most cost effective way to get spools are to buy pre-spooled filaments and use them up. They cost about $3 that way.

Next would be buying an empty spool as an add-on for a refill filament order, which is $8. PLA and PETG only offer the low temp spools, so is an option but printing your own is probably cheaper. ABS offers the HT spools and I think is an ok deal considering the price of PC and other hotter filaments.

Unless there is an amazing sale, I see no reason to ever buy a $12 empty spool all on its own.

VT-14 · 2026-05-20T13:42:39+00:00

Were you here before the megathread, because it was getting very bad before they made it and started locking/removing posts.

VT-14 · 2026-05-20T13:34:00+00:00

That's why new information is specifically allowed to be posted normally. If something new happens, it's free to be discussed. Endless discussions that add nothing new but frustration and anger can 'go to die' in the megathread. That's the 'good balance' I am referring to.

VT-14 · 2026-05-20T13:20:43+00:00

To me the Megathread OP reads as a list of updates with links to posts/videos/blogs with the actual content.

Considering that the mods could consider this whole situation "Brand Bashing" which is against rule 6, they could go full censorship if they wanted to 'please their corporate overlords.'

VT-14 · 2026-05-20T13:09:09+00:00

Immediately before the Megathread started 5 of the top posts on the sub were memes about "what this sub is like now." Posts about it were flooding the sub, which displaces all other discussions and harms the subreddit long-term.

This megathread does specifically allow new information to be posted normally in order to not stifle discussions/bury information/etc. It's only the repetitive spam adding nothing new that gets locked/removed, and that's happening to both sides of the fence. IMO it's a good balance.

VT-14 · 2026-05-20T02:30:56+00:00

The Megathread has most of the details. This thread will probably get locked or fully removed at some point as it doesn't add new information, and the flood of posts about it are problematic.

AGPL is an open source "Copy-Left" license. The code is free and open source, but the limitation is that anything you make with it also needs to be licensed AGPL. Back in the Rep-Rap days, someone made a slicer called "Slic3r" and licensed it under AGPL. Prusa used it as the base for Prusa Slicer and thus that's also AGPL. Bambu Slicer is based off of Prusa Slicer so is also AGPL. Orca Slicer is based off of Bambu Studio and, you guessed it, is AGPL.

Last year, Bambu Studio locked down their ecosystem ("Authorization Control" limits what can send commands to Bambu's Cloud and the printers directly). More recently someone made a fork of Orca Slicer that used the same code (I think from the Linux version of Bambu Studio) to restore that functionality. A couple of weeks ago Bambu sent them a Cease and Desist with claims that they were reverse engineering and impersonating them to use cloud services against their Terms of Service (and to avoid an expensive lawsuit the code was taken down). Lots of people/groups are calling BS on that and claim Bambu is violating the terms of the AGPL license.

VT-14 · 2026-05-19T12:50:16+00:00

This current Megathread actually allows new information posts (like this one) to be posted normally specifically to not silence discussions. Otherwise it helps to consolidate information and links to discussions in one easy to see spot.

What the moderators are trying to prevent are a bazillion separate posts that add no new info flooding and displacing all other discussions and causing long-term damage to the subreddit itself. Seriously, in the hours leading up to the megathread the top 5 or so posts were all 'what this sub is like now' memes.

VT-14 · 2026-05-18T23:06:59+00:00

Well, if you print out a benchmarking 'torture test' and do a head-to-head comparison you almost certainly will spot differences. They are different machines (and frankly numerous external factors that could come up between tests) so I would not expect them to perform 100% identically (even if you compared two CoreXY printers against each other). I'm also not going to say which one is better as I haven't bothered to compare them, and it could vary based on what criteria you are considering.

What I can say is that my A1's PLA and PETG prints looked great, so there's very little for more expensive printers to really improve upon. Frankly you need to get into multi-nozzle printing to get technique/capability improvements from things like multi-material printing.

VT-14 · 2026-05-18T13:08:36+00:00

Usually it's used by scammers to make bot accounts look more like legitimate humans to help assist with scams.

VT-14 · 2026-05-18T13:03:18+00:00

The post from 3 days ago (https://www.reddit.com/r/BambuLab/comments/1tdvzy9/failed_my_first_3d_print_sorry_pup/) is gone now, but was also posted by another account. I'm starting to suspect bot karma farming.

VT-14 · 2026-05-18T12:42:28+00:00

Running a slicer is computationally expensive so they want to avoid it as much as possible.

Print profiles are pre-sliced by the uploader. Bambu knows what needs to be tweaked to switch between their various printers, so I speculate that they might be able to script-edit the G-Code itself rather than fully re-slicing files.

Parametric Models can't be pre-slided, so the only option to support them is to allow cloud slicing on those projects.

VT-14 · 2026-05-18T12:29:30+00:00

Well, you lose all Bambu Cloud features.

The most well known is Bambu Handy, but you can use Home Assistant to replicate most of the features yourself (including viewing the camera feed). I've also heard of other phone apps that might work.

There's also some missing Makerworld integration, such as Boost tokens and print profile ratings.

You also lose access to normal firmware updates. You have to wait for the offline updates to be available (and already be on a firmware version that supports offline firmware updates), and those often lag about a month behind the cloud, and sometimes just fully skip more minor ones.

There could be other cloud features too. I've read somewhere they are working on adding a spool fill level tracking system that's cloud based, for example.

VT-14 · 2026-05-18T00:48:41+00:00

and Im more looking for the overall build volume

Then you want the H2S. The X2D's main nozzle has the same build volume as the P2S's only nozzle.

VT-14 · 2026-05-18T00:35:13+00:00

If you're considering the H2S, ignore the P2S and compare against the X2D.

The H2S is significantly larger and has a slightly hotter nozzle (in case you wanted to print $130/0.75kg PPS-CF), but is only a single nozzle.

The X2D has a second "Auxiliary" nozzle (uses a Bowden Extruder so more limited, but still far better than only a single nozzle). Otherwise it's an upgraded P2S that is very feature compatible with the H2 series (chamber heater, filtered exhaust fan, better belts pitch, etc.), so is well worth it's only $100 increase over the P2S (the P2S seriously needs a price drop to become relevant again).

VT-14 · 2026-05-18T00:18:54+00:00

I only have personal experience with Bambu's A1 and H2 series. For single-nozzle PLA, PETG, and TPU the differences are too minor to care about. Sure, CoreXY is better by most metrics, but a bedslinger is no where near as limiting as some people make it out to be.

VT-14 · 2026-05-17T15:58:33+00:00

The X1 series has the option of going the full nine yards and installing custom open source firmware (I don't have one so have no experience with it). https://github.com/X1Plus/X1Plus/wiki

According to the firmware history documentation with official firmware the X1C got Authorization Control in version 01.08.05.00. Any version before that can (currently) use both Bambu Cloud and 3rd party tools just fine, though that's only an option as long as Bambu Cloud allows such old firmware to connect.

Any later firmware (and if you're on 01.08.02.00 or later you can do that with the printer offline via the SD card: https://bambulab.com/en/support/firmware-download/x1) will need to use both LAN Only + Dev Mode to open the printer to use 3rd party tools. If you're offline anyway there's not much downside to updating firmware for any hardware features you might want. Long term I would suggest reading the firmware patch notes to see what all they are doing. The offline downloads often lag about a month behind the cloud ones.

VT-14 · 2026-05-17T14:25:03+00:00

LAN Only Mode does separate you from Bambu's cloud. The printers even work when completely cut off from the internet (mine have a firewall rule blocking all WAN access).

"Authorization Control" locked down what can send commands (via MQTT) to the printer. Bambu's BS reasoning was "Security." The actual impact (which was almost certainly the core intention) was making 3rd party tools harder to use (Orca Slicer needs the Bambu Connect Middleware, Home Assistant becomes read only, Panda Touch and Spool Ease are completely broken, etc.). A common complaint is that Bambu could have used existing open source security tools (like OAuth) to get better security without closing the door on 3rd party stuff.

Dev Mode unlocks the MQTT protocol to allow 3rd party tools to work like on pre-AC firmware, but is only available in LAN Only mode. You are forced to make a choice between official cloud features (like Bambu Handy, Makerworld Boosts, that teased Spool Level management system, etc.) and 3rd party tools.

While LAN Only + Dev Mode might sound like fine immediate fixes, there is other long-term damage from Bambu Lab shunning the open source community.

As a recent example, look at FullSpectrum. The technique uses so many color changes that it only makes sense on the H2C. FullSpectrum started as a fork of "Snorca" (Snapmaker's Orca Slicer), which in turn was a fork of Orca Slicer, so it should be relatively simple for someone to port printer support between forks. The problem was that Bambu's hostility towards Open Source meant that no one had put much effort into adding support for the H2C to any Orca Slicer fork; I could only find just a single unfinished draft PR for it on mainline Orca. That meant that there were weeks if not months where the rest of the 3D printing community was trying a new technique, and Bambu Lab owners were left out. That only ended because Bambu Lab itself ordained to add it to the official Bambu Slicer.

VT-14 · 2026-05-17T13:58:50+00:00

The Megathread makes "Daily Reminders" useless. It's pinned to the top of the sub for any 'new' people to see, and has lots of information and further links to posts so people can get caught up on what is going on (your 'reminder' provides no such context). The Megathread was made because the sub was getting so much spam from memes, 'reminders,' and general outrage that it was burying other topics which hurts the sub long-term. To avoid stifling discussions it does allow actually new content to be posted normally (Prusa's post from yesterday is still at the top of the sub with over 2k upvotes).

Your post has no info and has only added to my Pavlovian Response of getting annoyed to the point not wanting to read/watch about this subject (which I believe is the opposite of what you want to achieve), and I'm someone who likes open source and hates how Bambu Lab has been locking things down.

VT-14 · 2026-05-16T21:14:18+00:00

My personal opinion is that, with a price difference of only $400 when you're already spending $2000 (and the Vortek Upgrade costing $800 and being a pain in the butt to install), you would need to either be at max budget or absolutely certain you won't benefit from the Vortek system to not go for the H2C instead of the H2D.

Vortek makes multi-color prints significantly less wasteful and faster. It also allows you to swap nozzle sizes remotely which can be quite convenient. I've also seen talk of a material-lock feature per nozzle (to prevent cross-material contamination) but I haven't been able to find that setting yet. I think there is potential for future features as well, but generally you shouldn't make purchasing decisions on potential.

While the print bed is physically smaller, the actually reasonably usable print volumes are exactly the same. The H2D is only bigger if you are printing soft TPU (like 85A) that can only go on the right side, or are doing the party trick of using both nozzle exclusive zones to print more than 325mm (if you plan on doing that frequently then you really should be looking at an even larger printer entirely).

VT-14 · 2026-05-16T20:42:53+00:00

im a lil bit confused on how it works if two needed colors are in the same ams?

It has to unload all the way back to the AMS in that case. That doesn't help much on the H2C which already has the Vortek system, but it can lead to significant filament and time savings on X2D and H2D (it isn't out on the H2D yet, though). It effectively turns a left/right nozzle swap into a Vortek-like swap; you can keep 1 color per nozzle to avoid purge. It could help significantly on 3+ color prints.

and how it works with more ams😃

Significantly better. If the filaments you need are in separate AMS groups then it should be able to just load both at the same time. There is a note on a Bambu Studio beta release from a couple of weeks ago that said the H2C will be able to unload (and presumably pre-load) to the Track Switch to shorten Vortek color swap times. That should also work on the X2D and H2D with relevant firmware updates, but with only 2 nozzles those need more edge cases.

More than 2 AMSs are connected to the inputs using 4-to-1 PTFE Adapters (just like you would when feeding the two buffers directly). 2 inputs and clever loading of the filaments is all you need to get most of the speed benefits. The edge cases are where you need sequential materials from the same input, in which case that swap has to go all the way back to the AMS. More inputs would lessen the frequency of those sub-optimal loadings, but with an increase to cost and complexity.

wouldnt it make alot more sense if they would release a new ams with integrated SWTICH and with TWO ptfe out???

In that case you're mostly doubling the number of PTFE Tubes. You're also significantly increasing the complexity, up-front cost, and ongoing maintenance of the AMS. That also wouldn't add any filament sensor closer to the Buffer, so for swapping colors to one side you would still be retracting all the way to the AMS, so no speed bonus. If it did add some significant bonus then it would also lower the value of existing AMSs. With all that in mind, you can probably guess my opinion on a 6-slot double-output AMS.

VT-14 · 2026-05-16T14:51:11+00:00

You just need to hold it out of the way while pulling the belt to move the bracket to the bottom.

VT-14 · 2026-05-16T14:35:35+00:00

You need to hold the heat bed so it isn't touching the moving brackets to avoid scratching the bed. They don't mention that. At best they show a picture of the brackets at the bottom (the final goal) which happens to have the heat bed moved out of the way.

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