My AMS HT arrived today and I had a chance to test it with PPA and PPS. With a few workarounds I was able to feed both of them from AMS HT regular feed (not the bypass hole) leaving the external spool dedicated for TPU only use like I hoped. Main advantage vs the bypass hole is not having to mess around with PTFE tubes.
If you select Bambu PPA-CF or PPS-CF it will throw an error and say it is not compatible so you have to select Generic PPA/PPS. Also I made the filament path very smooth long arc but it still had a problem loading and got stuck in the PTFE tube on the last turn before the hot end as those filaments are too stiff. What I did is hit “load” before the print, and manually worked the buffer back and forth as it loaded to give it the tiny bit of help it needs.
You also need to checkmark “Skip AMS blacklist check” in Bambu Studio before initiating a print.
Just keep an eye on the tube in the buffer. It’s a little a curve and will wear out quickly with stiff abrasive filaments. Just try pushing a small length of filament through it by hand and you’ll see what I mean.
I just got done with a spool of ppa-cf. After loading it the second time I realized that going through the buffer applied much more tension than I thought it should have. Switched it to the tpu port.
It would be cool if we could connect a normal straight buffer, like the ones for the x1/p1, and use that with the ams ht through the tpu port.
Yes i always check on PTFE tubes as they wear out quick with CF filament. Ive changed the ones inside my AMS 1 multiple times due to wear, a few were split in half.
