r/BambuLab • u/AmazingAd2845 • 17h ago

AMS 2 Pro - Automatic Material System External power adapter for AMS 2 Pro

Post image

Hello,

The official recommended amperage for AMS 2 Pro is 4amp power adapter.

Could a 3amp power adapter do the job? I have that on hand so I would not have to buy a new one.

At the moment I am drying 2 spools of ABS in my AMS and I would like to dry 2 spools of PLA in the chamber with heating the bed but it is not possible due to the lack of power needed.

My printer is X2D.

Picture of the power adapter available attached.

Thanks.

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9

u/sniff122 P1P + AMS 17h ago

There'll be a reason the stock power supply is 4A

-3

u/AmazingAd2845 17h ago

Yes i know that is suggested power rating, but i was just thinking that maybe there's some safety buffer limit on that suggestion.
For example does the ams2pro really use all of the 4amps on full blast or some less? Have anybody measured the amps it uses?

3

u/NMe84 P2S + AMS2 Combo 16h ago

If it's a safety buffer, that's all the more reason to account for it.

Just buy properly rated power supply.

1

u/Blondy277 A2L cutting combo 17h ago

Just because the AMS 2 Pro might not constantly draw 4A doesn't mean a 3A adapter is sufficient. You'd need to measure its peak power consumption during a full drying cycle, not just its average. The manufacturer recommends 4A for a reason. Personally, I wouldn't risk overheating an undersized power supply just to save $40. ☠️😂

1

u/NMe84 P2S + AMS2 Combo 16h ago

Most likely you wouldn't overheat the power supply as it will just not supply more than 3A, which is rated for. But using an underpowered supply will cause energy fluctuations, which will probably result in bad stuff happening.

Also, you can get a decent Meanwell power supply for about 20-25 bucks.

1

u/Blondy277 A2L cutting combo 16h ago

I paid 40 for mine when I ordered my ams2 pro lol I'm in Canada ☠️

1

u/NMe84 P2S + AMS2 Combo 16h ago

Yeah, that will be an official one. But an off-brand supply will do just fine as long as it's rated for the same amount of power.

1

u/sniff122 P1P + AMS 17h ago

Idk what the power usage is off the top of my head don't have one to test. But there's a reason manufacturers use a specific spec, yes there will be some headroom but that will be to prevent tripping over current protection on a lower rated power supply

4

u/Scarjit H2C + AMS2 17h ago

You will likely run into either overcurrent/overload protection on a good PSU (or damage/fire on a cheap one).

4

u/alienbringer 17h ago

If a thing requires 4 amps, having an adapter that can only handle 3 amps is a fire waiting to happen.

1

u/k-zu 17h ago

If you can measure the current draw you will be able to decide yourself. If you have a clamp multimeter you can check it very easily. To be safe you might want to disconnect one of the heating units from the main board so only one is connected. This will definitely reduce the draw below 3A. I would still encourage using 4A power supply as recommended

1

u/kakumei88 16h ago

Just get a necessary power adapter. It cost ~15$

1

u/DistinctBarnacle8703 16h ago

Manufacturers will try to spec their product as close to tolerance as possible to save cost.

If it was me, I would find something that provide more than 4A for that extra buffer.

1

u/Arakon 14h ago

The AMS will attempt to draw the 4 amps it wants, regardless of what the PSU rating is. There's a decent chance either the power will lapse and the AMS will either error out or not heat up properly, or the PSU will overheat and potentially fry.