Getting Random Clogs What'd be The Reason?

Hi there,

I’m getting random clogs. The clog is mostly right before the hot-end. What’d be the main reason? I almost can’t sleep. Always checking the print at work because of I’m too scared of that happening again. I’ve trashed out almost 3KG’s of filament because of this reason. I’ve printed 6 of these without any problem and trashed out 5 of these always the same reason but at random layers. I’ve checked all the layers and speeds etc. Everything looks same. Pls help

Here’s some information;

P1S / AMS (Got it 2 weeks ago)

Using PLA from a local brand.

0.4mm nozzle

220 / 55 Degrees

Cold Pulling + Cleaning with need at 300Degrees and detaching the hot end and pulling the stuck filament there. Checking everywhere until no filaments are uncleaned.

Printing top with vent + front door open.

That pieces is gameframe base part from meeplekeepers and it’s 200MM high, 450~~gr. weight.

You can also see my settings in images.




fakinhel4
fakinhel5

That just looks weird. As it looks like you are running for a long time before it fails, I want to go to it is getting too hot in the extruder. Heat creep up until it clogs. You print open, but what is room temp? if inside gets near 40C with most PLA, you will start to get random extruder clogs. It could be material… I’ve had a few rolls with junk in them. I don’t think that here as you have 2 colors. Cool down the area if possible.

My room is around 30-32 degrees max right now. Much lower at nights also (around 15-20 degrees). I’ve had my last clog last night on exactly same part but this at at the 2hours mark.

I leave one of my windows open so room can cooldown but I have 3 windows.
I’ll definitely try leaving all of them open tonight.

But since the last one happened at night, I don’t think the room temperature is the matter.

That’s really strange and I can’t find anything similar happening to another person in the forum.

Also, how can I measure the inside temperature? The app doesn’t show anything about that.
fakinhel6

Sorry, my X1CC shows chamber temp. 32 as room temp is pretty high. Right now we’re coming out of winter and where ive got my printer it is about 22 or 23c. My chamber hits 32c after an hour running 70c bed (pei plate) with door closed and lid on riser an inch up. Try this. Run one part say a 4 hour print for roughly 2 hours. Pause it for 30 minutes. The bed will stay at 50, but nozzle and head will cool down. Restart and see if it finishes

Okay so I’ve told wife to open all the windows in the room now. I’m printing the same part night now at %55 of 9.5 hours, no problems till now. Let’s see the outcome. Really got anxious about this…

Good luck. I’m supposing all the short ( 30 minute to an hour ) prints come out ok?
If so, im betting heat creep

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It’s like there is no problem if I print something not “bulky”. I’ve printed hogwarts (9.5 hours, lot of details) without any kind of problem. I print 5-6 hours parts with not much filament, but the details are lot.

I think if I maybe lower the speed, that’d affect print time significantly but at least I get a succeeded print…

Yeah I’ve checked it last night and it was working. All of the fans were working but that night I got the same failure.

Are you printing with the door open and/or a spacer to vent the top glass? This will usually be enough to keep the chamber temps lower for PLA printing.

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Yeah the door is always open and I’ve printed a pretty high riser so air can flow easily. But yet I’ve ordered a temp measurement device so I’ll put it in the chamber and will keep track of it with timelapses. I’ll check for temp. at the failure timestamps

Out of curiosity, have you measured the OD of the filament you’re using? Just wondering if this is the issue? I’d spot check it in as many places as you can just to be sure…

Update: I’ve downloaded Orca, tried max flow calibration and it was pretty ok even at max speed.

  1. So I’ve changed my print settings, and slicing via Orca, not Bambu Studio.

  2. I’ve also checked my nozzle settings

  3. Kept open all my windows according to, room was pretty damn cold when I got in my room in the morning.

IDK what was the one that resolved the problem (or even if my problem is solved or not) but, right now I’m printing base parts in 5 hr/per (it was 10 hours with my previous settings), same durability, better quality.

Only issue was there was some layer adhesion on the layers can be seen in the photo, but it didn’t become a failure after all. I will keep the post updated if any failure happens. Thanks for all the help!

I know it’s printing nicely now that you’ve swapped to Orca, but if you ever figure out what exactly happened please tag me. I had the same issue as you, it just randomly fails at a certain place and I’ve trashed 2kg of filament cos of it. Your failure looks exactly like mine with weird stringy bits and I haven’t been able to fix the issue even using Orca.

It’s not only Orca. You should try what I’ve done. It was like a lot of moves combined that solved my problem actually.

I’ve done all of those before trying Orca; it didn’t fix my problem. I even bought 2 diff brands of filament lol.

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