All AMS Units need to pass through Filament Track Switch? (H2 Series)

Bambu Lab H2 Series
1

Hi All,
Trying to figure out if there is a way to have some AMS units pass through the FTS and have some that don’t? I am not sure if that can be done.
Long story short (I think :rofl: :man_facepalming: ) I have 3x AMS 2 Pro units and I am fine with those passing through the track switch. I also have 2x AMS HT’s (1x for TPU together with the feed assist module and 1x is for Support material). However, having daisy chained them all, it seems they all need to pass through the FTS, which I would ideally not want. Reason is:

I have a small seperate stacker for the HT’s ( AMS HT Dual Stack Sliding Bracket AMS HT Stacker X1P1P2A1 Printable - Free 3D Print Model - MakerWorld ) (away from the stacker housing my AMS 2 Pros) and the HT’s pass directly into the left/right nozzles, thanks to this great little mod ( Dual Inputs for H2C/D - UPDATED - Free 3D Print Model - MakerWorld ). But, because they are all daisy chained, the H2C thinks the all the filament, all the AMS units need to pass through the FTS (which sits under my workbench). Getting to it is a PITA and much easier to feed the HT’s directly into the toolhead. But, again, it doesn’t like it. Filament gets there with no errors, but will retract back, unless it passes through the FTS.

Anyone know if what I want to do is possible?? (Really hope all that made sense! haha)

Thanks everyone! Your help is always appreciated!! :slight_smile:

2

At present, the FTS does not allow any filament paths that don’t go through it - no AMSes that bypass, no external spools, no TPU assists.

Bambu has stated they are looking at allowing external feed sources, but I’ve never seen them say anything about having AMSes bypass.

3

Right.. thanks CarbonForge.

Well.. lets hope Bambu sort this out as I don’t see the need for every AMS to ‘have the need’ of passing through the FTS. Surely, a simple ‘IF THEN’ type of routine could easily solve this issue or some kind of exclude option during the setup of the FTS?
Managed to get a PTFE tube to my FTS as I needed supports for a print, so currently my setup does work, but not exactly how I would like it.

But as the saying goes.. “what do I know, I just work here!” :rofl:

4

You’re right, there is a lot more to it.

The printer needs to maintain “mapping”, or in other words, a constant awareness of what is where and how it’s all connected.

That seems like a relatively minor task, but Bambu printers (most consumer printers, really) have shockingly minimal controllers in them.

When we encounter those irritating situations where a certain step has to complete before we can command it to do something else, or the printer has a strangely clunkly multistep process to do anything - it often is due to limitations in how many things the printer can control at once.