I have just upgraded to the X2D including Track switch, TPU assist module and AMS HT from my X1C and so far very disappointed like apparently many others. For one I wanted to print TPU as I did previously, and purchased a TPU assist module which I feel was a waste of money as I am not using it because you cannot unload the nozzle without disconnecting a tube between the Assist module and the splitter allowing the direct drive to retract it. Surely when it was designed it was obvious it needed to regulate the withdrawal to sync with the DD left nozzle retract. Now I am just going directly into the left nozzle via a 1-4 splitter as I did with my X1C.Then what I consider the most ridiculous situation is that when I put my TPU into the AMS HT and feed it through the TPU outlet I cannot do anything without disconnecting the Track Switch. I am not the only one by a long shot complaining about this. Can the developers please allow us to disable the track switch via the Control panel ??? At least that would alleviate some of the disgruntled X2D users…
I think Bambu Lab already promised that allowing an external spool holder with the FTS installed will come with a future update. I guess we have to be patient.
One print on makerworld might be helpful for you, saving the 4in1 in front of the main input:
I guess you have already seen the 4in2 manual switch from the same author? I decided for that instead of the FTS and I’m very happy so far. Maybe use that for now and combine it later with the FTS when software is nore mature?
That’s what the back of my X2D currently looks like for 2x AMS2 + 1x AMS HT that I also use as TPU drybox :
No idea about the TPU assist module.
Thanks for that. I have just ordered the 4-in-1 Bambu Adapter so I can repurpose the quick release tube adapters for the 3D printed dual splitter as it look a much better, stronger and more stable idea. Let’s hope Bambu update the firmware soon to disable the FTS allowing us it use an external spool without faffing about at the back. I will print the new TPU assist box as well in you link as it is far less friction.
I agree with this post and would like to see a simple UI button to bypass that warning. I had the same issue on my H2C. Was running TPU from AMS HT to the dedicated TPU slot (I dont have the assist module yet), which I had manually connected to the Right nozzle inside the printer and I got this warning that I couldnt print with the FTS, even though I wasnt using the FTS. I told the printer I was using right side external spool. Because it 1) wouldnt let me “load” TPU into the HT, even though I was using the TPU bypass hole, I couldnt tell the software that TPU was in the HT. 2) If I told it I was using the left external spool it said “you cant use TPU on the left nozzle”…even though I was directing it to the right nozzle. and then 3) cant use with FTS.
So I had to unplug all power to the FTS just to print TPU. Thats a pain.
Just throw up the warning and let me say “okay” or some sort of temporary software disconnect of the FTS until Im done with my TPU print. But honestly a full disconnect would not be desired, because what if I wanted to print with PLA on the left nozzle (using the track switch) and TPU on the right nozzle using the dedicated TPU slot….I wouldnt be able to unless I manually fed PLA into the left nozzle by undoing all the PTFE on the FTS too.
So…Im hoping Alex_vG is right and it will be a firmware update soon.
I dont print in TPU because its such a PITA right now.
I feel for you folks that have the FTS and the TPU Assist…you got all the right stuff and it still wont let you do what you’d think it logically should let you do.
Is the FTS beta firmware out of Beta? I thought it was out of beta by now…but could be wrong.
Anyhow….you’re not the only one…I agree with you and want the same thing
+1 vote for this. A simple option to “Bypass FTS for (Left|Right) nozzle”
This would allow FTS to still feed to the opposite nozzle, but would indicate that we are using the external spool directly to the nozzle input
Here similar problem: the TPU Feed Assist Module does not work while the Filament Track Switch is connected. I’m also having frequent loading problems with the Track Switch itself.
Both the Filament Track Switch and TPU Feed Assist Module are less than two weeks old, and I’ve already been going back and forth with Bambu Lab Support about both issues. Fist spent way to much time on troubleshooting before I contacted them.
The first problem is the combination of the Filament Track Switch and TPU Feed Assist Module. Support has confirmed to me that they do not work together. When the Track Switch is installed and I try to use the TPU Feed Assist, the X2D gives the following message:
“External spools is not supported since Filament Track Switch has been installed. If you want to use external spools, please uninstall it.”
My TPU setup is completely separate from the Track Switch. TPU comes from a separate AMS HT, through the TPU Feed Assist and directly into the main extruder. It never passes through the Filament Track Switch.
I use the Track Switch with two AMS 2 Pro en AMS HT. units containing materials such as PLA, PETG and the HT uses ASA
And that brings me to the second problem. Even without the TPU Feed Assist connected, I frequently have loading problems with the Filament Track Switch itself. PLA and PETG simply fail to pass through it. Sometimes changing the PTFE connections between A and B changes the behavior, and when feeding filament manually you can clearly feel resistance inside the Track Switch.
According to Bambu Support, this could be caused by the firmware of the Track Switch and printer not being fully aligned, which can introduce additional feeding resistance. Their recommendation was to update everything to the latest firmware and test again.
Both my X2D and Filament Track Switch are already running the latest available firmware. So that doesn’t solve anything.
I honestly don’t understand why Bambu Lab sells the Track Switch in its current state when there are these kinds of problems. These accessories are not even two weeks old. And if you want to return something because it doesn’t function properly, you have to go through another (frustrating) process of proving the problem, providing information and doing even more troubleshooting.
I’ve already invested far too much time troubleshooting this thing and exchanging messages with Support. They are always polite, but being polite doesn’t make it any less frustrating when you keep getting the same questions and suggestions after you’ve already provided the answers or performed the troubleshooting. At some point you’re simply going around in circles.
So I’ve removed the Track Switch from my X2D and will throw it in the trashcan. Yes, that means throwing away money on an accessory that is less than two weeks old, but the time I’ve already spent troubleshooting it and communicating with Bambu Support has cost me more than the Track Switch itself.
At this point, throwing it in the trashcan is simply the easier and cheaper solution than spending even more time discussing a poorly functioning product with Bambu Lab and to try to get my money back. 
The only advice I can give to people considering the Filament Track Switch is: think twice before buying it. I really wish I had done that myself. Knowing what I know now, I would never have bought it in the first place.
It seems like Bambu Lab cares more about influencers on YouTube, Instagram, and other social media platforms than about its paying customers.
Same Problem! Using the H2D, Filament Switch and TPU feeder. Please support the Tiket: github bambulab/BambuStudio/issues/11007
I just found this thread, unfortunately too late. I bought a second AMS2 Pro for my H2D along with the Filament Track Switch, thinking I could connect two AMS2 Pro’s and my AMS HT all at once so I wasn’t having to constantly reconfigure hardware for different materials.
After being frustrated with the FST I finally gave up on it and now have the AMS HT and one AMS2 Pro connected to my right nozzle (using a 4-in-1) and the other AMS2 Pro connected to the left nozzle. I found I can print with TPU using the AMS HT, feeding through the TPU port on the AMS HT, but then running the TPU through the 4-in-1 and into the normal right port and it works fine.
I plan to get a dedicated dryer box for the TPU and seeing if I can connect that to the 4-in-1, so I’m not having to take up my AMS HT for TPU.
But Bambu really needs to fix the FST so that it actually works right. And as far as the TPU Feeder, I bought one of those too, but I haven’t used it and honestly I’m not sure it’s even necessary as my TPU has printed just fine the way I have it set up now.
So, basically the FST and TPU Feeder are a total waste of money at this point.