AMS2 Drying Issue: P2S refuses drying non-Bambu filaments when printing

[bplein]

I am attempting to start an AMS2 drying cycle while a print job has already started. I have the optional power supply.

I am currently printing with a generic PETG, and all 3 remaining spools have been pulled out of the feeder tube (so in the printer, they appear empty).

When I attempt to start a drying cycle, I get:

This AMS is currently printing. To ensure print quality, the drying temperature cannot exceed the recommended drying temperature.

Notice how some like Generic PETG show up with a valid value for temp and duration, others are zero.

There is no “recommended drying temperature” in the print profiles. If I have a Bambu filament loaded, it’s fine. I believe this is caused by some missing parameter in the filament profile (which was based on Generic PETG to start), and Bambu isn’t exposing it (just forces us closer to their semi-walled-garden).

Thoughts?

[bplein]

Well look at that (in the filament profile)

    "filament_dev_ams_drying_ams_limitations": [
        ""
    ],
"filament_dev_ams_drying_heat_distortion_temperature": [
"0"
    ],
"filament_dev_ams_drying_temperature": [
"0"
    ],
"filament_dev_ams_drying_time": [
"0"
    ],
"filament_dev_chamber_drying_bed_temperature": [
"0"
    ],
"filament_dev_chamber_drying_time": [
"0"
    ],
"filament_dev_drying_cooling_temperature": [
"0"
    ],
"filament_dev_drying_softening_temperature": [
"0"
    ],

[bplein]

I hacked the JSON for the one filament that’s loaded and it’s printing with, and I still get the same error (although it properly loads a temperature and time).

Not sure why I paid for an external power supply when the firmware doesn’t support using it.

[Eponymous]

It does work when NOT printing so the power supply isn’t totally useless.

Drying while printing is a new feature only recently implemented (and some feel it affects print quality) so it’s possible this is a bug rather than a design feature.

You can re-use Bambu RFID tags and stick them on other spools, and can also clone the RFID tag.

[bplein]

When “not printing”, the power supply isn’t necessary (the P2S can do that without the external PS).

But you have a point about the RFID route, I haven’t gone there yet, but it might make my life easier, or at least more interesting

[CarbonForge]

Bambu is always a risk-averse company, that’s just how it is. They tend to hold back features that could compromise reliability until they’ve fully tested it. Usually.

When the HT and Pro were released, there was no dry while printing.

Dry while printing was only enabled after Bambu completed their internal testing and ensured that it could be done without compromising print reliability, and even then it operates at a lower temperature.

It’s not possible for Bambu to categorically rule that every other brand of filament can withstand dry while printing, so it’s not at all surprising that this isn’t supported for third party filaments.

Fortunately, if you manually set the filament to Bambu and choose the equivalent of what you’re trying to print, you should be OK, but it’s up to you to look at the material spec and ensure it’s similar to the Bambu material.

[bplein]

Oh, it’s not risk aversion, it’s downright blocking non-technical people from using the application as a USER would intend to use it. The Bambu print profiles have settings that are not surfaced in the UI, in such a way that it’s blocks casual users from taking advantage of the feature if they use non-Bambu filament.

If Bambu intended to convey “safety first, this filament hasn’t been tested”, they would say that. But they don’t.

The purpose of a system is what it does. In this case, it blocks you from AMS drying 3rd party filament while printing, adding friction to using non-Bambu filament.

Note that it doesn’t block you from AMS drying while NOT printing, which indicates that Bambu trusts the user takes responsibility for properly setting temperatures.

[MZip]

Well, good luck arguing that with Bambu. They use experienced makers to populate a model repository for folks who aren’t really into 3d printing per se but want to make all the cool stuff. We are less a market than a largely unpaid army giving them sales material.

Arguing here doesn’t really help.

[bplein]

The solution is to use the Bambu P2S control panel instead of Bambu Studio. Orca Slicer can’t initiate the drying, Bambu has added complexity that’s user-hostile.

”Arguing here doesn’t really help” … then why are you joining the discussion?

This forum serves a purpose: The next person who runs into this issue and comes here looking for answers is going to see my post, some non-answers, and then my workaround.

[MZip]

@bplein

”Arguing here doesn’t really help” … then why are you joining the discussion?

Because stating a fact IS contributing to the discussion.

You asked for “thoughts”. You didn’t specify that we needed to get them approved by you before posting.

Then there is reality. The AMS2 fills a certain purpose that doesn’t seem to align with your use. I don’t know Bambu’s design goals but it seems to me it’s best suited to usage where people leave filament in the AMS and don’t want to fuss with actual filament dryers.

It seems to me you bought the wrong dryer for your purposes. Maybe firmware updates will fix it for you and maybe they won’t. The AMS2 is kind of an odd duck that you want to be a swan. Good luck with that.

It’s Bambu’s company and products. Realists understand that some companies use features to both distinguish their products and lock out competition.

You want a dryer that will dry your filaments without caring whether you use Studio or Orca, maybe you’ll eventually get it. Bambu does add features. But I’ve seen lots who buy something not understanding how it works and then bleat for a manufacturer to “fix it”. A regular dryer might have been a better choice for you.

You don’t like me telling you something you’ll see here over and over in other topics, too bad. You don’t get to gatekeep like that.