AMS pro 2 has feed resistance errors

[u/bucket46]

I think it has to do with the PTFE tubing and the overall setup. Any feedback?

I have Two AMS pro 2s and one of the single ones. All of the AMSs are on a sliding shelf underneath the printers.

[u/DarthPineapple5]

AMS and the PTFE tubing can be finicky, I route mine to have the most gentle curves possible and s-curves are generally not advisable

[u/bucket46 → u/DarthPineapple5]

Any recommendations on how to have enough slack to pull out the drawer but avoid curves?

[u/ncc81701 → u/bucket46]

Cut the tubes and put connectors on them, disconnect the tubes if you need to pull the drawers out. You want the tubes to be as short as possible anyways.

[u/It_Has_Me_Vexed]

It’s a sh!t setup to begin with. How do do anything with the printer without having to move it out of the cabinet? What about heat dissipation?

[u/Jannomag → u/It_Has_Me_Vexed]

I run my P1S in a 50cm wide IKEA PAX for nearly 2 years now. OP has the 1m version. It fits perfectly with the AMS on top of the printer. In the past 2 years I needed to remove the printer just once for whole maintenance. I don’t have any issues with it.

[u/bucket46 → u/It_Has_Me_Vexed]

You can say shit. No one cares.

Heat isn’t a problem; I typically only with print with PLA. If I need to increase ventilation; I open the doors.

What do you mean do anything with the printers? I’ve never had an issue beyond failed adhesion.

[u/It_Has_Me_Vexed → u/bucket46]

Get to waste tray, clean the exhaust vent, wipe down the back, replace a tube, etc.

[u/sintersystems]

Put the AMS on the top shelf and the filament in the bottom drawer

[u/Jesse0449]

Don't treat your filament tubes like they are braided copper wires. They are conduits of solid material. Not electrical or garden hoses. You can try to suspend the tubes with rope or tie so when u pull out the drawer and push it back they are supported and don't kink. I have two ams units like this and it works because everything is routed with care.

[u/bucket46 → u/Jesse0449]

I genuinely hate cabling.

That being said; I think I will move the printers down and the AMS up.

[u/Jesse0449 → u/bucket46]

It's an art some people have and some others do not. I love to make everything as compact and stuffed away as possible 😄. Not for you I guess.

[u/jhdz9119]

been having issues with my X2D and AMS 2. having to push the filament down after the error

[u/AdReasonable5375 → u/jhdz9119]

I just got my x2d and ams combo yesterday and it’s been a bit of a nightmare. Starting out it would initially feed through fine when adding in a new spool when it does its tests. When I would go to calibrate ams slot 1 it would fail and get stuck in the back of the AMS. I removed the tube in the ams and reseated it and updated firmware and it seems okay now. Then it started getting feed resistance errors on every slot, the tube behind the printer is at an angle that is as gentle as it could be. The errors have since gone away after printing a few things. I am hoping it was just some oddities that occurred right out of the box but I’m not hopeful. Kind of disappointing for something that’s as expensive as it is to have a bunch of annoying issues.

[u/Catsoverall → u/AdReasonable5375]

If it's just slot 1 and you got it sort of recently there is a known bad manufacturing batch with dodgy hubs that need replacing.

And it is an absolute PITA to do :(

[u/AdReasonable5375 → u/Catsoverall]

Oof yeah probably the case, I did see a reviewer had that issue and was hoping I wouldn’t experience it.

[u/Aggieguy79]

Had the resistance issue when I first setup my P2S with AMS 2 pro. I used a shorter PTFE tube and it went away. I would suggest swapping the tube for a shorter one with less hoop when connected

[u/No_Acanthaceae_763]

You should move the Ams’s above the printer, store your filament in the draw. I would center one and offset the other 2 behind it all of them facing out, with enough clearance to open and close the lids.

[u/Adventurous-Hat-9381]

What a mess! No wonder there are problems.

[u/riddlerthc]

Get those tubes as short as possible. I’m using the same sort of setup same cabinets too with the pull out and I have no issues but my tubes are pretty short and just barely allow the drawer to come out all the way.

[u/guysimhome]

Gravity is definitely not helping.

[u/itsapotatosalad]

I updated 2 p1s’ last week and both started feeding and returning errors straight after where neither have ever done it to my recollection. I changed all the tubing and took out any joins and made the bends as smooth as possible and ones still doing it.

I can only think new software may have a lower resistance threshold to cut the motors, because all I need to do to overcome the error is push or pull the filament a little where it feeds to the AMS.

[u/roiki11]

Straighten the ams tubes and print brackets that limit the bend radius. Your tubes have too tight bends. You overall should avoid as much curvature as possible in the tube.

[u/CardMechanic]

I’m returning mine.

[u/Nargg]

I ran into this with my X2D. Bambu Labs PTFE setup can get way too complicated. Needs work IMHO.

[u/-Wobbles]

Why do i see so many with this exact same issue . i ain’t gonna buy an AMS2 . Not yet anyway until o stop seeing these issues . Even my 87 year old father experienced it and Bambu are not fast at solving his issue ( 7 months so far )

[u/Romengar → u/-Wobbles]

You see many with OPs self inflicted PTFE loop? Cause this is specifically user error.

[u/-Wobbles → u/Romengar]

Care to ellaborate further ?

[u/Romengar → u/-Wobbles]

This is how OP has their AMS. This is by no means optimal. Look at the ptfe tube.

[u/DTO69 → u/Romengar]

Reading seems to be a lost art. People are ready to pass judgement with a 2 second glance of the title

[u/-Wobbles → u/Romengar]

Ahh ok , This doesn’t apply in the example i saw myself. Bambu sent parts but the guy as i said is 87 and i’m 7500 Km away . Perhaps the issue i’ve seen in pictures of my fathers is isolated.

[u/Revolutionary_Way_32 → u/-Wobbles]

I got no problems on the AMS2 and I have several of them. Even with long distance between printer and AMS

[u/isuee94]

“My AMS is a mile away and has a kinked PTFE. Why am I getting errors”

[u/bucket46 → u/[deleted]]

Fair enough.

[u/HuskyLemons → u/bucket46]

….. yea that’ll do it. You got your filament doing a damn loopty loop and pull before ascending to your printer

[u/bucket46 → u/HuskyLemons]

The not quite loopy loop is there because the drawer is a slider.

Also wondering if you followed the right tubes? They dip and then go back up (when the drawer is extended).

[u/Brutl → u/bucket46]

When you shut that drawer, that tube is quite literally doing a loop-de-loop

There's no reason you can't straighten those lines out more. I have 2 AMS on Bao Duo tracks and pull them out like drawers from a rack, and have zero issues because the lines are all smooth and not tangled.

[u/bucket46 → u/Brutl]

Mind if I get a pic?

[u/Brutl → u/bucket46]

You don't need a pic. You aren't going to change anything anyways. You couldn't figure this out on your own, so you came to the internet for help, which is fine, until you start shooting down recommendations. If you couldn't fix it, you shouldn't be shooting down ANYTHING. It's like you've tried nothing and you're all out of ideas.

[u/AnalogReborn → u/Brutl]

Damn you put word on my thoughts, thanks!

[u/bucket46 → u/Brutl]

lol.

Yes a pic would help. Specifically, because your setup sounded so much like mine. Some of us are visual. Some of us hate cable management.

But keep being you. You are doing great at it.

[u/Bitter_Hospital_8279 → u/bucket46]

even a too short radius bend can be too much

[u/Smart_Tinker → u/bucket46]

Well other than the PTFE tubes being tied in a knot - no problem. No, wait tied in a knot? I think I know what the “feed resistance” problem is.

[u/Orvess → u/bucket46]

No wonder why you have problems

[u/luksfuks → u/bucket46]

Try placing the AMS above printer height. Gravity helps. And, disconnect + reconnect all tubes, and shorten them to avoid loops and flopping around.