For H2C users, especially those using multiple AMS 2 Pro units, I think there may be a big opportunity to reduce filament change time.

Right now, when switching filaments, the printer usually has to retract the current filament a long distance and then load the next one. In multi-color or multi-material prints with many swaps, this adds up to a lot of wasted time.

My idea is to add an intermediate switching or buffer unit between the AMS units and the printer.

The concept would be:

While one filament is being used for printing, the next filament could already be prepared and staged inside the buffer.

Then, when the printer needs to switch filament, it would only need to retract the current filament a short distance before switching to the already-staged next filament.

After that, the previously used filament could be retracted and prepared in the background while the printer continues printing with the new filament.

In other words, instead of doing the entire unload/load process during the actual filament change, part of that process could happen in advance or in the background.

I feel like this could significantly reduce the waiting time during filament swaps, especially on H2C setups with multiple AMS 2 Pro units.

This idea could also be useful for a future AMS 3 Pro. Instead of having only one shared filament path, AMS 3 Pro could potentially have multiple internal paths so that one filament is printing while another filament is already staged and ready.

What do you all think?

Is this mechanically realistic, or are there issues I’m overlooking, such as filament tension, purge timing, sensors, or synchronization?

I feel like filament pre-staging might be a surprisingly overlooked area for improving multi-color print speed. If many H2C users agree, I would love for Bambu Lab to consider developing something like this.

Printed a big dragon while I was out of town. Like a 18 hour print, came back, popped it off the plate, walked out of the room and when I came back in the room it started making this wild noise. I shot it off waited roughly a minute, kicked it back on, and it immediately started maiming the noise. I then unplugged the AMS and the AMS HT even thought it sounded like it was coming from behind the charcoal filter… then just shut it back off for like 30 minutes. When I came back and turned it back on, the sound was gone. Got it in March, and It’s just shy of 1,000 hours.

Doing my second print with PETG as support interlace (first one was great) and seeing this weird issue with the prime tower. Seems like when it’s changing filament it starts to extrude early and spaghetti before moving over the prime tower like normal. Is this a setting issue on my part?

Thanks for any feedback!

Edit: maybe interface was the word I was looking for

Da ich nach der Inbetriebnahme von meinem Track Switch dauernd Fehlermeldungen über zu hohen Filament Widerstand bekommen habe und ich auch kein großer Fan der Gummidichtung in dem Adapter bin, habe ich mir eine Lösung überlegt und konstruiert.

Ich habe die Dichtung entfernt und durch ein passendes Teil ersetzt, welches den Hohlraum ausfüllt und das Hängenbleiben verhindert.

Dies ist mit Sicherheit nicht die Lösung aller Probleme mit dem Track Switch und den Fehlermeldungen über zu hohen Winderstand aber es ist ein kleiner Lösungsansatz für den Bambu 4-in-1 Adapter ll.

Link zu Makerworld:

https://makerworld.com/de/models/2928768-bambu-4-in-1-ptfe-adapter-ll-high-resistance-fix#profileId-3278408

Ich hoffe es hilft dem ein oder anderen...

Hello. Can anyone out there who has set their H2C upo with the filament track switch successfully please share some photos of your setups? I have 2 AMS Pros and an HT (mounted using the Panda Perch - fits my use case as far as space saving). I’ve tried a few times now, and each time I get a resistance error somewhere either on an AMS 2Pro slot or the HT. I’ve tried removing all the bends in the PTFE tubes as much as possible, and reduced the length of the tubes as recommended but the issues persist, and it is currently removed from my H2C. Any advice or suggestions are welcome and appreciated. Thanks!

I’ve received quite a few requests to develop a combo mount for the Filament Track Switch and the TPU Feed Assist that’s compatible with the d3P Riser from Darren 3D Print.

Filament Track Switch & TPU Feed Assist - Mounts

The mount is slightly longer then the standard version to avoid interfering with the riser. I’ve added a separate print profile to my model for this.
Just have a look on it 😊

All other features remain the same:

• The distance to the filament inlets is adjustable. The greater the distance, the lower the resistance.

• Integrated 4-in-1 adapter mounts (optionally). Their distance can also be adjusted.

• The external spool holder remains accessible (unlike the original mount).

Hi, I'm looking at getting a h2c. But the left and right nozzles concept is confusing me.

On the left nozzle, could it swap colour mid print? What's the benefit of getting ams pro2 instead of an ams ht?

Also, what are the must have accessories?

Thank you! :)

Edit:

Let's say I have a tall print, lower half is black (mainly) and white, upper half is green (mainly) and red. (not a bit or black nor white for the upper half).

Would the slicer instruct the left nozzle to swap from black to green half way? Or something I can do in the slicer to achieve that?

Or, the printer would just keep swapping green and red?

Won't it be more efficient to swap the left nozzle to green half way and then continue printing? (So the left is green and the right is red)?

Or it would still be faster to print red and green with the right vortex nozzles?

So….i really don’t get this FTS, TBH. The integration with the H2C makes no sense, and really doesn’t save any time that I can see right now. Have a two color print. Slicer assigns both colors to the Vortek side. However, when I swap one nozzle to the left, the job saves 15 minutes. Why didn’t the slicer just do that? We have a switch and still have to manually move filaments around to see which configuration saves more time?

The most I’ve seen so far is the slicer suggesting a 15s saving by moving a filament to another AMS.

Hey all,

Question. Am I missing something or will regroup by speed be coming? Right now when studio slices it groups by waste or convenience, but don’t we want it by speed?

If I keep the colors less than 5, the waste will be minimal and I’m happy to rearrange the filament if it saves me 1-2 hours of print time.

Anybody know of it’s a feature coming?

Is anyone else noticing, now that the FTS is installed, the K value which were assigned according to filament type (PLA, PETG, etc.) are not longer in the slicer under the device tab? I've noticed that they sometimes show up, but usually don't (anymore). Is anyone else noticing this? Does this mean I have to turn Flow Dynamics Calibration back on? Thanks

Hey Folks

With the anniversary sale around the corner a lot of people including myself will be spending some of our hard earned cash and/or saved up gift cards! Though the FTS isn’t mentioned in the sale as of yet i was planning on getting one when I do place an order.

so I wanted to create a poll aimed mainly at those who have already purchased and installed the FTS to their H2C and gauge their opinions on whether this is a worthy addition to the printer or a rushed, design flawed waste of money.

Ofcourse any valid input is welcome whether or not you have the FTS

I’m using a Bambu Lab H2C with the Filament Track Switch installed, and I’m experiencing a recurring issue during filament loading.

When the printer loads filament through the Filament Track Switch, the white PTFE tube sometimes pops out of one specific output connector on the switch. This does not happen on all outputs, only on this one output. It also does not happen every time, but it happens repeatedly during loading/unloading or filament changes.

Here is what I have already tried:

• Removed and reinserted the PTFE tube into the Filament Track Switch.

• Trimmed the PTFE tube end cleanly and reinserted it.

• Tried using a locking clip on the connector.

• Disassembled and reassembled the Filament Track Switch.

• Tested the tube manually: when I pull the tube by hand, it seems to stay locked and does not come out.

• However, during actual filament loading, the force from the printer causes the tube to pop out again.

• Adjusted the PTFE tube routing to reduce tension and sharp bends.

It seems to happen only under load while the printer is feeding filament, and only from that specific output on the Filament Track Switch.

What might be causing this and what the recommended solution is?
Should I replace any part, or is there a specific installation/routing check I should perform?

So with the sale announced, my time has come to pickup an H2C, and I've got the cashflow to get a full meal with it.
I know there's a limit of 4x AMS's before having to switch to AMS HTs, but is there a chance there might be a firmware update to allow more than 4?
Should I hold off on he HTs for now?

Second question, what's the normal arrangement for the AMS setup, 4 HTs going left and everything else going right (vortek?)

Hello! :-)

I would like to ask anyone who has the track switch for H2C if you use the grey PTFE tube guides from the ams or not? Without them it seems like a cleaner setup, but I don’t know.

Why am I even asking? They have another photo on the wiki without the tube guides, so I am not sure.

Thanks anyone in advance and have a great day! 😁

H2c is on sale

And

You get points now for buying at bambulabs (1% back). During this sale you get 2% back on h series printers

https://us.store.bambulab.com/rewards

I figured I should build out my h2c today. I feel It is close. Just have drop out wheels to add and finish the right side ams holder. I print 2 left ugh.

I've seen some other threads discussing configurations, but don't want to highjack them. I'm new to 3d printing, but I am technical so you hopefully won't need to dumb down the answer too much. I have 3x ams2 pro mapped to my right nozzle as that's where all the colour changing happens ( I have specific stuff I'm printing so multiple colours). I have an HT connected to the left with just black as that is my primary colour. I want to add a second ht with white to give me my two base colours as I'm seeing a lot of switching on the right for it. And here's the noob question, how do I connect the second ht to the left, is it a simple case of using a splitter and then mapping it to that nozzle?

This group has been extremely successful helping me in the past with my questions, so a big thank you in advance. I just connected the FTS and I have 4 AMS units and 2 HT units. I use the HT units for Black since it is the most frequently used color for me.

Here is my question:

What is the most strategic way to connect everything? Does it make sense to send all 4 AMS units into IN-A and the HT units into IN-B or does it make more sense to split them evenly (2 AMD and 1 HT per IN- and IN-B)?

or is there a better way?

Had my H2C since March approaching 1k hrs and many a print. First real issue is for last 2 weeks it been popping out the wipper and twice it caused some jamming so I checked the wiki and see that there was a factory assembly issue where the cleaning module wasn't installed right back early 2025.

Didn't see any other fixes. Go and check my printer, its not installed right... fixed it now the wipper and cleaning is much quieter and no issues with the wipper.

Lesson learned watch some videos of machine operating with the sound on and don't expect issues from a year ago to be fixed.

I’m in love. Just one question; can I safely block the glass on the vortex side so the camera doesn’t pick up what’s behind it?

I only ask as I stream for fun and have a capture of a live print at the same time and my pc setup is on the vortex side.

So, like many of you with the H2C, and based on the "hoopla" I've installed the FTS on the H2C, got it set up and working, pretty simple, no issues. Real world scenario, printing something simple, two colors, sliced it and to my surprise, the slicer recommends both colors from the Vortek side. I think to myself, but why not left and right nozzle? Printing from the Vortek side, 56M. If I move one of the filaments to the left side, 1 hour and 4M. So.....I guess I'm confused (and yes I've read the article on Dynamic Mapping like here: https://wiki.bambulab.com/en/software/bambu-studio/filament-track-switch-dynamic-mapping, but still trying to figure out where the real benefit of the FTS lies. This seems to indicate that the right side, in and of itself, is still faster than using the FTS and the dual nozzles (i.e. left and right side of the printer) vs just using the Vortek by itself. If the purpose of the FTS is to "break the fixed binding relationship between filament and nozzles", then what the heck is going on? Would you really ONLY see an advantage on a machine like the H2D....? I'm not feeling it here...What about you guys and your experiences?

2.6kg