can I also operate the HUB with only one Ams? I will only add the 2nd ams in the course of the year.
Yes : no problem about that.
Anyway, when you install at the same time several AMS (and the hub), it is adviced in the wiki to plug them one by one (in order for the internal IDs to be clear, first plugged in AMS = AMS ID #1, and so on - otherwise, if you connecte everything at the same time, the IDs are going to be random and maybe less adequate). And at each step (even during the first step) each AMS is perfectly working (including the very first one, when alone). The extra AMS are anyway “chained” at the output of each previous one.
One extra benefit to put the hub even when you just have one AMS is that you’ll have less manipulations (screwing / unscrewing / unplugging the difficult to unplug PTFE tubes, …) (by the way, this is very helpful regarding that topic : PTFE release)
The only problem in the end is that you will still have to “buy” the single filament buffers even if you buy the hub from the beginning … (as these buffers - roughly 22€ each - are included in the AMS package, and hence “paid” each time you buy an AMS = you will have (like everyone else) 2 useless filament buffers that you’ll never use…)
ok if i have 4x ams i need 4x filamentbuffer, so to speak? (this is included in every ams sentence?) and then into the hub.
No, you don’t need any of the filament buffers that come with the AMS if you use the AMS hub—the hub completely replaces the filament buffer. So if you buy and attach four AMSes, you will have four extra filament buffers that you will never use.
No : this is what i was saying, you’ll end up with 4 filament buffers being totally useless, and you’ll only use the AMS hub (that you’ll have to order separately).
Conclusion : at that point, you bought 4 “single” filament buffers (22€ each) for nothing (as they are packed inside the AMS packages and cannot be removed).
Thank you are great !