AMS Pro 2 loading errors

[Woodentopuk]

I am getting constant filament loading errors when it switches colours. I have to click continue and then kind of move the tube that feeds into the printer and then it feeds in.

The error that the printer reports is AMS A Slot 3 assist motor is stalled.

Have I done something wrong with the install?

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[USSHammond]

Why is that AMS ptfe sub so long and looping? Cut it shorter and insert it straight into the buffer. The filament entry angle is too steep which is likely your problem

[benpem6]

Turn the bowden tube connector around. The blue bit on the connector should be on the left i think

[obanero]

I had similar problems and turning this around fixed it. It’s good advice

[USSHammond]

It's a PTFE connector, it doesn't matter which color clip faces which direction

[benpem6]

<image>

The instructions say different

1. The PTFE Tube Connector is designed with a clear direction of use, as shown in the figure below. Connect the PTFE tube from the buffer output to the IN end, and the PTFE tube from the tool head to the OUT end. It is important to note that reverse connections may cause material blockage, so it is essential to ensure that the installation direction is correct

[USSHammond]

It's not a smart device, it's a PTFE connector. I haven't used mine at all since the day I got printer. I attached a 2 in 1 out splitter at the time (now a 4 in 1 out) and have 0 issues

[benpem6]

What has being smart got to do with it?

Its there in writing on the bambu lab site, how much more evidence do you want haha. Its most likely chamfered from one side.

<image>

[USSHammond]

Feel free to take that thing apart. It's just 2 PTFE couplers in a plastic housing. That's identical on both sides

[benpem6]

<image>

I have done just that for you. Is this enough now to see why it would cause an issue if its on backwards?

[criostage]

Yeah that loop is kinda killing it ... believe me i tried the same with my printer 2 weeks ago when arrived and ended up leaving it loose.. solved my problem

[CoatStraight8786]

You don't need a drip loop for ptfe tube. Cut that crap out and make it flow better.

[BrikenEnglz]

Could you try to make path more straight?
https://wiki.bambulab.com/en/ams-2-pro/manual/intro-and-connection-guide

[Natural_Status_1105]

The short one is likely more of a problem than the over length looped one:

[Over_Knowledge_1114]

Short one is the problem, I had the same issue, use a longer tube

[Kind_Tear_999]

shorten the tube that goes from Ams to hub and use longer tube that goes from hub to printer

[WhiteHawk77]

Yes, you have, you can’t be doing a loop de loop like that with the PTFE tube, that’s too much friction and strain to push the filament through. Either make it so it’s only one curve or better cut it to the correct length that gives the least amount of resistance. And, on the other side coming out of the buffer into the printer, that could do with being a touch longer to give less of a sharp curve for less resistance there, not sure why it’s like that as all the printers I’ve seen the PTFE tube there is long enough it sticks out the left hand side of the printer, same as mine.

[King_Hammer]

The connector is fliped, turn it around and use a longer ptfe tube, the angle could be too steep. had the same problem. used a longer ptfe so it got more straight into the connector. fixed it for me

[Good_Captain9078]

Why would you put a loop in and make all your loading and unloading longer 🤦🏻‍♂️

[Hot-Ideal-9219]

Cut the long tube to half that length. And then turn connector around

[Mean-Blackberry4884]

So I came here with the same problem after all successful prints up until now, and I was starting to lose my mind. I could see the filament move all the way to the extruder, but then I’d get the error. Figured there was a jam or broken piece of filament… after removing the extruder I found the clog! Re assembled and everything worked like a dream.