Question regarding H2D with Two ams pro 2

Bambu Lab H2D
1

heya !

i already have 1 ams pro connected to my h2d … via the 6 pin.
everything work fine and heating option work great also.

If i buy another unit , can i just connect it via the second 6 pin poort provided behind the H2D ? or i need to buy a power supply for each?

is the power supply only if they are daisy chained ?

2

You only need a power supply for additional AMS units, not the first.

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3
  • If the drying function is enabled for multiple units, each AMS 2 Pro requires its own Switching Adapter.

im confused

4

You only need the power adapter if you plan on drying filament in more than 1 AMS at a time. If you only want to dry 1 AMS at a time, the 6-pin is more than fine!

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5

ok so … 2 ams drying at same time , 2 adapter ? 1 each?

6

You technically only need 1 adapter on one of the AMSes. Not sure if it matters if it’s the first one or second one from the chain of 6-pins. I just bought 2 for my 2 AMSes to be safe, because why not.

7

I use 2 AMS 2 Pro with my H2D. The first one in the chain has no power adapter. The second one has a power adapter. In this config i can dry in both AMS at the same time.

8

I have the H2D and 2 AMS Pro 2. I went ahead and got 2 power adapters.

I have my H2D plugged into a UPS, where as the power cords for the AMS2 are plugged into a regular power strip. Ideally in a power loss situation the AMS2 will stop drying and the printer will run as long as possible on the UPS.

The printer can power one AMS while drying, but honestly I prefer a stand-alone power adapter.

9

I use a power adapter for all three of my AMS2 units, just to be safe.

Compared to most other expenses in this hobby, an adapter is relatively inexpensive.

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10

I’m just lazy. I have 2 AMS pro 2’s and no power supply. The H2D can heat either one, just not both at the same time. I’m not a massive printer, I seem to run out of things to do, so only being able to dry 4 rolls at once is fine for me.

I also have an AMS HT and to be honest I find it more useful to just dry one roll when I open it.

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11

I do have stand-alone driers - Sunlu S4, S2, E2, Polydryer - but I do really like how the Bambu dry function works - with the vents and rotating spools and such.

I wish they could function stand-alone as dryers [without being hooked to a printer]. Granted who would have an AMS that isn’t hooked to a printer - but I like to shut down my printer when I’m not using it and doing so stops the AMS from drying even if they have their own power adapters.

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12

Anybody remember a warning popup that said something like. “Ams performance will be better if using external power supply” When drying at max temp? I would have swore I saw something like that before I put them all on external power.

Edit
Stupid AI response lol.

" When the Bambu Lab AMS (Automatic Material System), specifically the AMS 2 Pro, is used to dry filament while the printer is also running a print job or calibration, you may encounter a warning pop-up indicating that the drying power is being reduced. This happens because the AMS shares power with the printer in this scenario.

Why the Warning Appears:

  • Shared Power: The AMS 2 Pro, when drying and connected to the printer via the 6-pin bus cable without an external power adapter, draws power from the printer.
  • Prioritization: During printing or calibration, the printer prioritizes its own power needs to ensure successful completion of the task.
  • Reduced Drying Power: Consequently, the AMS’s drying power is automatically lowered, potentially affecting the efficiency of the drying process.

Improving Drying with a Power Supply:

To ensure optimal drying performance and prevent this warning, especially during printing or calibration, it is recommended to use an external power adapter for the AMS 2 Pro when using the drying function. This provides the AMS with its own dedicated power source, allowing it to maintain full drying power regardless of the printer’s activities.

Makes sense when you compare the printers psu rating and the draw of an ams2 drying, plus everything in the printer besides the bed. Maybe calibrations take alot of processing power too

13

So if i only have 1 of the 2 AMS with power supply , can i use this one for drying while the other is printing ???

or both need to be off work to be able to dry??

14

One can dry while the other prints

15

I was thinking of using one of the Meanwell 350W 24V power supplies to power all three at once.
I’ll design an enclosure for it, with three positive and three negative outputs, three 2.5 mm jacks (if I remember correctly), a power switch — and that’s it, all set.

16

I found that even with both PSUs plugged into the AMS 2 Pro units, only one would dry at a time.

I then tried to unplug one of the AMS 2 Pro units, and I got the same (I left the one plugged into the H2D directly plugged in.)

I then plugged the second unit back in and POW… they both are suddenly able to be set for drying.

Weird, but now working.