First off I do want to say it is a great system and it works quite well most of the time, so I don’t want it to come off like I think it’s a bad system at all. It’s super impressive what you can achieve with the AMS system. Especially for printing multiple colored prints.
Unfortunately, early on my experience wasn’t so great. I had a few issues with the original breadbox style one that is used on the X1C / P series of printers. Mostly due to the system either jamming and having to be taken down to clear the jam / clog. Bay 3 would always jam after a few hours of printing on it, I ended up having to print upgrade parts for it and replace the PTFE tubes with capricorn tubes (an added cost) to alleviate the issue and that didn’t fix it completely. Bambu even sent new parts and that didn’t fix it completely. Unloading was like playing Russian roulette sometimes LOL!
Another issue was with it not detecting non-bambu filament or just being extremely picky about what kind of spools it liked.
They do not like most cardboard spools and you have to print a frame to reinforce the cardboard, especially the non-compressed ones. While it’s not a huge deal, some manufacturers’ spools are juuuust big enough, when you add the spool stiffener, they become too big for the AMS so it won’t close. I even had some plastic spools not fit very well. I usually prefer cardboard spools because it’s less waste. Many places won’t recycle the plastic spools but they’ll recycle the cardboard ones.
The other issue is that it’s just super time consuming and it adds a lot of extra print time and residual waste to the print. Purge towers / blocks are something that really needs to be fixed altogether within the 3D print community, it’s not a bambu issue but a community / industry issue. There needs to be better handling of purging and changing color. Some are starting to use infill as the purge area but it’s still hard to calculate the purge this way when there’s many jumps in small color details purging into an object is better but still not the best solution…
A few other things that I didn’t care much for was the fact that it’s not really a dry box so if you have filament that is really temperamental or super hydroscopic you can’t keep it in the unit for extended periods of time. The silica packets only do so much, they don’t really dry filament that well and since the unit is not heated, eventually that moisture is going to creep faster than the packets can absorb. I do like that the AMS is sealed and you have the moisture monitor but it needs an improvement. Give me some heat! Where I live and where my printers are, it’s super humid in the summer and fairly wet in the winter too so I can’t keep spools in the AMS for very long without moisture being a potential issue. Especially with filaments like Nylon.
The AMS-Lite is completely exposed so long-term filament storage is basically nothing and the filament is always exposed to the elements. I know there’s some dry box mods for it but it just seemed like a big PITA to deal with mostly because I really don’t like how much space the AMS lite takes up. The external space it needs is just an annoyance to me. I like how the OG AMS stacks onto the printer, I feel it’s a much better design. The Ams-Lite gives me flashbacks to back in the day with the original Wanhao and CR10, having that big honkin’ control box flapping around taking up desk space LOL! There are some cool wall-mount solutions too but again, it takes up a lot of space. I don’t like that.
The other thing is, I just simply didn’t use it enough. Bambu eventually sent me a new unit after all of the trouble that I had with my first one and the second one worked way better and was much more reliable but I just found that I didn’t use it enough to justify the added cost. You can buy a LOT of filament and printer upgrades for that extra $350
Don’t get me wrong, most of the time multi color prints are cool as heck, especially when they blend seamlessly. All of the hueforge stuff is killer but for day to day prints I’d rather just print in a single color or if I need to print a couple of colors I can put in pauses and manually swap. I don’t need the AMS to do that. If I’m printing figurines I’m printing those in resin so I can get the absolute best quality possible. I know it’s not feasible for everyone but that’s just how I operate right now. I would love to revisit the AMS again in the future when they update it and add on a few things like a heater and what not. But right now it’s just not that useful for my personal use case. I know some folks use theirs all the time but I didn’t use mine as much as I thought I would so I decided to sell it.
I think everyone should really think hard and assess their uses and needs for it. If you’re REALLY going to print lot’s of colors all of the time, then I’d say it’s worth it but if it’s just an occasional thing, I don’t think it’s worth the upgrade IMO.