r/BambuP1S

Any thoughts?

I tried cleaning the bed with soap and alcohol. The glue worked at first, but after a couple of times, the problem came back.

Bambu Lab PS1

ABS Esun

The speed is 20mm

everything was working fine until yesterday, removed a print, went to print same thing same material same settings and it pulled this, tried cleaning nozzle and regularly wipe down build plate with isopropyl alcohol. even tried a different build plate entirely. Can anyone please help

edit: forgot to add context sorry
im using P1S, ive been using it for a year
its ona a textured plate
using PLA
the problem generally has been occuring on the first layer of printing but i believe did happen on a latter one last night

Orange light is blinking now on that slot.

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Hi everyone,

I’m having a strange issue with my Bambu Lab P1S + AMS.

When loading filament from the AMS, the filament travels all the way through the PTFE and appears to go past the filament sensor and into the extruder. In the video, you can see the filament reach that point, but the extruder drive gear spins without actually grabbing/feeding the filament. After a few seconds, the AMS retracts the filament.

The important part is:

In manual extrusion mode, the exact same filament is grabbed by the extruder normally and extrudes through the nozzle without any problem.

So the extruder is mechanically capable of feeding the filament.

Things I’ve already checked:

Original Bambu hotend installed/replaced.

Extruder disassembled and checked — no debris or broken filament inside.

PTFE tube trimmed and checked — filament moves smoothly through it.

Extruder mechanism is correctly assembled.

Manual extrusion works normally.

Tried all 4 AMS slots — exactly the same behavior.

Same filament works perfectly when manually inserted.

Downgraded the P1S firmware — no change :(

The video shows the filament apparently getting past the filament sensor, while the extruder gear spins but doesn't grab it.

Could this be a problem with the filament sensor / sensor logic during AMS loading, or is there another part of the toolhead that controls when the extruder engages during an AMS load?

I'm running:

P1S firmware: 01.10.00.00 (before downgrade)

AMS firmware: 01.00.06.83

Any ideas what could cause the extruder to grab the filament manually but not during an AMS load?

Thanks everyone for the replies and advice :)

It’s been out for a while now, how is the Bambu TPU four AMS working in the AMS? I have a P1S with AMS and want to make sure it will really work? I don’t have a dryer; will fresh roll be ok? Are users out there having pretty good success with it and is it still relatively flexible? I bought a roll for my grandson and we’re hesitant to try it in the AMS just yet. What’s the real world experience been with this product? Thanks.

Recently my print support has been terrible. Why is this?

I got 99 problems and a pin was one.

Sorry… it’s late and it was my brain firing.

Okay the real bit I wanted to drop here though for future travelers with z-homing issues. Normally it’s the build plate being misaligned or something sticking in the gap for the back z-tower. But I had a z-homing issue that was not anything completely obvious.

I’ve been running this printer for 1,654 hours as of this message and I’m coming up on 2 years ownership. This was a new one for me.

I thought there was some kind of obstruction at the top since the bed never bumped the nozzle… well I was right. But it actually turned out to be the silver sleeve around right vertical rail guide. I noticed that the one on the right was pushed up above the black plastic assembly that connect the bed to the right rails. The left side’s little silver tube was flush with the black assembly. I looked all the way down to the bottom trying to figure out what the hell could have taken it “out of battery” the way a slightly misaligned slide on a handgun will prevent it from firing.

Lo and behold, there is a recess in the base of the print volume to help accommodate the rail guides when you’re sending the bed all the way to the deck. I’m printing some spartan armor and I haven’t done anything large enough recently to warrant the full use of the volume. Turns out, I found a little pin from a costume build I did last back in December! It was PETG, so it laughed at the bed rail guide tube and was the source of it being pushed out of battery.

The solution: I painstakingly did the dance of using a needle nose to fish out the debris down there. Once clear, I sent the build plate all the way to the deck, one step at a time, via the on screen manual Z hops. You cannot hold the button here as the printer will be freaking out about “You haven’t homed Z, do it now?”… press the back arrow, then press OK to reselect the Z hop and sent it down a step again. Rinse and repeat the OK>DOWN>BACK steps as many times as it takes to firmly seat it on the deck. Then I took a flat head bit screw driver and gave it a firm couple taps with the heel of my palm, and it reset it back into place. Instant happy z-home afterwards.

Hope it helps someone! Pics attached for references, sorry I didn’t think to take one showing it out of battery, but just picture the silver tube protruding up further than what you see in the pic (flat head is touching this piece).
Happy printing!

Im getting an edge off of the top layer that seems to look like the print head goes too far as it extends past the wall as shown in the photo (top of curve). I have ironing on but there is no difference if I adjust the ironing inset, which is why I believe it was happening prior to ironing (could be wrong though). I have also tried adjusting top layer flow, ironing flow, and line width. Any help is appreciated.

P1S, PLA, .4 nozzle

Edit: This is happening on 1 of 5 printers and only is certain curved sections, not on every curve. I have re-calibrated with the same results.

Was doing a print, then it ran out of filament while I was sleeping and I woke up loaded new filament in and now it’s not printing anything, because it’s not grabbing the filament. Could this be a clog?

Printing on a new p1s in petg, I dried the filament for around 15 hours before use

Is this normal? Fan whirs for a split second then nothing. The ams seems to be working but I disconnected it and removed the sd card to see, the lcd screen is also not turning on. I thought that only the screen wasn’t working but idk if anything else is normal.

Sorry for the bad picture.

I’ve accidentally cut the ribbon cable for the fillement sensor. I can’t find a guide on how to replace it. Does anyone have one?

Hi everyone, I've had my Bambu Lab P1S for 3 months now and everything was running smoothly until today. As you can hear in the video, there is some squeaking/whistling (around 0:16 - 0:18) and especially small 'cracking/clicking' sounds (around 0:23). Is this normal? If not, how can I fix it?

I just bought this printer today it’s a p1s and I was getting an error code about the nozzle fan not working. I took the cover off and noticed the middle plug was loose. I unplugged the top one for the fan and the middle one fell out with the connector that’s supposed to be attached to the board. Any fixes?