I think by engaged they mean that it’s ready to go. I could be wrong but mine does not behave the way your saying yours does.
“Engaged to move the gears of the extruder” implies to ME that it’s ready to move, not moving, and will move when a command to move is sent.
Anyone have any good ideas for this fault that is obviously not isolated to a few.
My printer was fine until it stopped in the middle of the night. after chasing a fantom AMS fault I took the extruder parts off. All clean, all functioning. on reassembly7 I got a bunch of extruder fan errors due to the awful loose plugs on the P1S.
I checked resistances as per teh wiki and all reasonable,.
It just seems that the motor is either not being controlled correctly so its jittery or is not man enough to draw in the fillament.
Note that this is not a hot end issue, the motor is not even getting the fillament into the extruder wheels. if pushed it can sort of get there. If it was a power thing I would not expect jittering, I think its a control thing. Very disapointed as I have loads of printing to do and its all back onto my prusa. Anyone properly solved this rather that just off and on a million times until it works by fluke?
When I first got my P1S it worked great with the Bambu Filament they included, but when I used some Anycubic, I started getting filament jams in the extruder. After getting tired of removing the extruder and taking it apart to clear the jam, I researched into the possible cause and found adjusting the tension on the extruder to be the fix. I recommended to Bambu to include an access hole in the hot ends cover to allow easy access to the tension adjusting screw. Different filaments have different hardness and softness. If the tension is too strong it seems to crush the filament in the extruder if the filament is too soft and might also be involved with “heat creep” which can soften it additionally. I don’t know if it can cause stuttering. My 72 year eyes can’t focus on the extruder wheel while its moving.
I’ve found the bearings in the extruder need some love once in awhile. I pulled mine recently to clean and noticed the bearings had what appeared to be debris in them. Just spinning them in hand they were not smooth, especially compared to new.
I happened to have some bearings for a “wanna do” project that I’m never going to do, so I swapped.
Seems to not have hurt. I wasn’t having any real issues but I know they were on the way if I left them alone. The bearings could have been cleaned and lubricated but since I had some, why bother.
Take a look at the two. May be worth it.
Although I started my own thread about the issue in the A1 mini forum, I found this thread here during my research. I have recorded a video of my machine doing this here and I’d love to know if that is the exact same problem described here?
My guess is, that it is due to a clogged nozzle. Can this be the case? The printer is brand new (3 weeks) so I doubt that the motor is damaged.
Ok i know i’m super late to this thread but i think i found a solution. at least for me. After 1100 hours of printing with zero issues i suddenly had what i thought was a clogging problem or heat creap. but after replacing hot ends and extruder gears and taking everything apart and cleaning everything and putting it back together, I thought to try and print something without the AMS and it worked flawlessly. So I started looking into the AMS as the culprit and cleaned out that whole thing and replaced all of the PTFE tube in the AMS and everywhere else just to be sure. I havn’t had a problem since. Let me know if this helps anyone else.
Also late to this thread but have a similar issue with my X1C. No audible stuttering or skipping, but when I help push the filament in to the PTFE inlet on the back of the X1C (with AMS disconnected), I get significantly better extrusion (without it I get almost no extrusion). I have a theory that this is due to ‘slippery’ filament - I’m printing silicon carbide from Virtual Foundry. Next steps are to check for free-spinning black gears. Will keep you posted.
Checked the feed assembly and found everything to work as expected (with slight gunk that really didn’t impede the spinning of the assembly).
After taking apart all PTFE tubes and ensuring free movement of filament, I finally figured it out:
The filament I am using had reduced from standard 1.75mm to 1.5mm over the span of the reel. This had two effects - the first is that the printer thought it was printing more material than it actually was. The second is that the spring force on the opposing filament gripping wheel was not sufficient with the smaller diameter - resulting in slip. Solution is probably to yell at the filament manufacturer to tighten their tolerances.
Hopefully this helps someone before they take apart and reassemble their entire printer.
Same problem, what worked for me was to clean and lube the idler wheel on the tension arm of the extruder. Works fine now.
Changing ptfe tube solved my issue
Nop. False start. Just try to print long print and clogged again. Don’t know what to do.
Change ptfe tube, filament, extruder, hotted, stepper. Still clogging.
SOLVED: Hey Guys, I’ve been dealing with this problem for days, changed everything including the extruder (which is wild when I realised what fixed it for me), the should be a bearing on each end of the extruder exclosure for the main gear and I was running mine with one missing, when I swapped them over it fixed all these issues. Realise this might be a bit obvious for some but to others CHECK YOU HAVE BEARINGS IN BOTH SIDES OF THE EXTRUDER HOUSING - hope this helps!
Brand new A1 starting skipping after about 20 hours of use.
Reading through this forum had me a little concerned.
After deep cleaning, including the hot end, and finding absolutely nothing, I noticed the tensioning screw was all the way in.
I loosened per Bambu’s recommendation and all seems good for now.
Fingers crossed.
Hi,
This may not solve your problem but check that the magnet on the filament gear metal latch is in its correct place,
If it is, then try reversing the polarity, i.e. turn it over and see if this makes any difference.
let me know.
I stumbled upon this thread as I too was experiencing the same issues. Mine had come after having replaced the original extruder with a new one from Bambu (straight replacement), and then having “upgraded” to the BiQu Panda Claw.
I ended up removing the claw (can direct you to my review on their site if you like), and returned back to the stock gears. After doing this, I’d noticed the same issues reported in this thread, random skips in extrusion, sometimes complete failures to extrude for a few seconds but then random recovery. Truth be told, the claw was a similar experience.
I just disassembled my extruder tonight and gave it a deep clean (some of the grease from the claw install had made its way into the stock gears but it didn’t look like it was in the path of the filament though), and it was then when I found my problem. It seems that the Bambu plastic gear assembly I had installed contained a secondary gear (the one that turns just before the area where the filament flows through) was of the slanted gear teeth variety, but the corresponding gear on the grey arm part was straight teethed.
I’m unsure now if my issue was caused by accidentally mixing gear parts from my original extruder and the replacement from Bambu, but ever since the deep clean and ensuring the gears interlocked properly all has been running well.
I hope this helps anyone coming here and still not finding relief with their issue, thank all of you who have posted here before as all of this guidance has helped me get to a working state.
Happy printing!
I came here to post what was my issue with my A1 gear skipping. After checking everything the tension spring, (fully screwed it now). etc. I realized when I changed my hotend assembly that the 3 black screws they provide don’t come with washers. I reused my original screw with the 3 washers, the 3 washers put enough pressure on the nozzle that it was really hard to close to metal clip and was creating too much pressure. I removed the 3 washers and everything is smooth now. I compared both and confirmed that original assembly that came with the machine the groove are deeper to account for the washers.
I hope this help someone.
TL:DR remove the 3 washers from the screw in the hotend assembly if you replaced it.
Good evening.
I work as a technician, and one of the first things i would check for is the volumetric flow. I have come across it a few times now that some people have chosen the wrong filament profile. The other option is that the nozzle has build up inside because of moist filament. I would suggest to clean the nozzle properly with IPA or another solvent.
Jeez. I wish you’d recorded how you did all that. Sounds like a great tutorial that’d help people.
I just had a similarly described issue today and fixed it!
My gear was skipping and got clear under-extrusion issues.
Turns out the issue was there was filament inside of the hotend (like after being cut) that wasn’t being pushed out for some reason. So after ensuring the hotend was properly lined up I melted that filament out @ 300*C and pushing filament through, the skipping went away!
Issue likely due to improperly aligned hotend hole to extruder hole.
Did you ever figure out what was actually causing the issue? Im having the same issue and im kind of losing my mind. It randomly works and randomly doesn’t. I open it up and everything looks fine?