Immediately severely clogged after only 2 test prints
Well my new core one arrived yesterday - in good shape and everything included - so I was excited to get started.
Too my surprise there was a black galaxy PLA included - not an orange one - but who cares right .. well not exactly, as it turns out.
Did 2 test prints - the logo and the little boat - which came out great so I was def excited.
Then the nightmare started ... during my 3th print, everything 'clogged up' - which I know now after spending quality time in the live chat with some friendly support people. This is a new experience to me - I understand this is apparently a 'common PLA issue' - but I never encountered it in my 5 years of printing with my MINI+.
It only took 2 prints on the new - quite expensive 'flagship' - to have everything clogged up apparently. Even so severe that I now have to remove the hotend to resolve this apparently ... raising hotbed temperature with purges did not solve the issue (see picture below).
To make matters worse, it is very hard to judge what is PLA and what is not as everything is black ... sigh.
The 'silverlining' is of course that I am up to learning how to disassmeble my new printer - only a couple of hours after it arrived assembled.
Seriously. This is not amusing at all.
Is this just 'bad luck' or am I up for regular clogging hell with this new printer ? It didn't help btw that one of the support agents basically told me that this printer is not really suitable for PLA due to it being 'enclosed' ... euh what ? That's not what the marketing says ...
Overall not quite happy and what a bad way to start this new adventure ...
Any experiences on handling this clogging mess could be helpfull !
Thanks,
Steven
RE: Immediately severely clogged after only 2 test prints
I've never seen plastic melted next to the extruder gear. Can you verify that the heat break fan is working?
RE: Immediately severely clogged after only 2 test prints
Thanks for your suggestion. Fans seem fine - I redid a fan test check and it passed without issues.
Kind Regards,
Steven
RE:
That looks very unhealthy indeed. Have you done much scraping at the plastic already, or is this how you found it after you noticed the clogging?
I would not do any further poking or disassembly, but contact Prusa support right away and wait for their reply. Looks to me like you are in for a Nextruder replacement. ☹️
I second Brian's hypothesis that the heatbreak fan (or its electrical connection) might have failed. You don't want things to get so hot at the extruder gear that filament can melt there. But again, I would not do any further probing beyond switching things on briefly to check whether the fan works. -- Ok, forget about the fan comment then. Stupid forum software; your post only showed up after I had written this one.
RE: Immediately severely clogged after only 2 test prints
Thanks for your feedback. This is how I found it. In the meanwhile I contacted support and they suggested to disassemble the hotend - as https://help.prusa3d.com/guide/how-to-replace-a-hotend-assembly-core-one_385707#386026 - and check its status. And also try to poke the plastic out at the nextruder bottom ... sounds like a 'plan' ... sigh.
RE: Immediately severely clogged after only 2 test prints
So I am happy to say that my issue got resolved - having spend almost the whole day in LiveChat with support engineers and me getting a crash course in disassembling the printer and clogging in general.
When I disassembled the hot bed then that revealed that there was indeed stuck filament - it stuck out for a couple of millimeters. But that wasn't visible by just looking at the nextruder.
I was finaly able to extract a stuck filament of 5 cm by also removing the front part of the nextruder and heating up the nozzle to 290 degrees. It took more then 5 minutes on that temperature before I started to get it moving. It took me another 5 minutes or so to slide it out completely.
As to why this happened with a brand new printer ... 'just bad luck' seemed to be the answer.
Let's hope so. I redid a test print and that worked back fine.
Kudo's for the various support people that looked and helped along the way.
RE: Immediately severely clogged after only 2 test prints
Good to hear that you got a satisfactory result,
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: Immediately severely clogged after only 2 test prints
Well, damn... been lurking around here for quite some time, but it seems I'll also be keeping a close eye on this forum and my finger on the cancel order button if this becomes a common thing. :/
RE:
Keep in mind that this is the exact same Nextruder as on the Mk4(s), so there's no reason to assume that this represents a pattern or trend with the core one. For example, I haven't yet had even one clog on my mk4(s) in well over a year, so I fully expect that unless a unique hardware related cause is discovered on this particular printer, this probably is simply a 'bad luck' event.
-J
Well, damn... been lurking around here for quite some time, but it seems I'll also be keeping a close eye on this forum and my finger on the cancel order button if this becomes a common thing. :/
RE: Immediately severely clogged after only 2 test prints
I have same problem, 2-3mm over extruder nozzle was snapped off like yours, did heat extruder up and pulled it out manually. But it happen again. Did a search on how to dissemble the extruder and driver unit, but weirdly i found no guide at all, only a guide on removing nozzle. Now I found your post and I see the latch for the filament driver on the side, but I'm missing how you got into the drive itself. I assuming the three m3 on motor is the way.
I did 1 PLA than 1 PETG and back to PLA, I have the problem now. Current looking into it.
RE: Immediately severely clogged after only 2 test prints
Ouch sad to hear you have the problem 'again'.
Yeah basically only executed step 2 of this guide as pointed out by the support engineer - https://help.prusa3d.com/article/nextruder-filament-sensor-core-one-mk4-s-mk3-9-s-xl_465702?utm_medium=chat&utm_campaign=link-shared-in-chat&utm_source=livechat.com&utm_content=help.prusa3d.com
Hope this helps.
I have been printing all day now and so far no problems anymore ... hold on wood !
RE:
Yeah its weird and thanks for the link, I see I should have searched for Mk4 instead of Core One.
I have dissembled it a couple of times now and still having the issue.During a longer print the filament gets stuck then stripped and breaks 2-3mm above nozzle. Theory I have, is the alignment into the nozzle may be the problem, making filament prone be bent or get skewed, then stuck, making the gear skip via clicking noise, not sure if Nozzle clogged even with multiple tests via unload+load, with and without hot+cold pull.Did one short print that went fine, but all long prints fails around ~45-60min, since it started happening.
Loading and purging through nozzle seems to go fine, only issue I've had when loading is the same clicking noise when filament doesn't hit right trough into the nozzle. I understand this problem, and the cut we do get the filament all the way into the nozzle, but why during the print is the puzzling part.
So, to sum up, my current theory is the filament path into the nozzle may be the problem, I did fiddle a lot with the tension but no sure win yet.
I'll contact support when I have a good idea of the ups and downs on the Core One. Like with my other Prusa printer, I like know their, ins and outs, good and bad sides.
But Like you said, didn't expect this problems from the get go.
All near same layer / time
Below is a gif, click it to view.
RE: Immediately severely clogged after only 2 test prints
That Nextruder housing looks horrible. If you have another printer I'd reprint that. You can get the part from printables. It should be the same part from the MK4S.
RE: Immediately severely clogged after only 2 test prints
Ok found a somewhat solution, adding more and cooler air onto/around the whole extruder unit keeps the PLA from snapping / extruder clicking noise. So the cause has something to do with softer filament due to heat build up and the strain on filament via the driver. This has not a been a problem with PETG yet.
I'm not sure if the driver in my core one adds more strain to the filament than a normal system does and I can't not spot a sure thing directly causing this with certainty.
I will ask support on this, if they know something.
Also to note, the PLA used is the Prusa Galaxy Black, that came with the printer.
RE: Immediately severely clogged after only 2 test prints
Try using a regular PLA, not Galaxy. I’m surprised Prusa sent Galaxy filament with a new printer. The sparkly particles are more likely to cause clogs. I ran some on my new MK4S and clogged my HF nozzle right away. Not as easy to get a HF nozzle clean but finally succeeded after multiple cold pulls. I now only use the HF nozzle with regular filament. Anything with additives goes through my standard Obxidian nozzle.
RE: Immediately severely clogged after only 2 test prints
Exactly this ... I stopped using the galaxy black included and used a regular for 3 days now and so far no more clogs.
RE:
Order this part from Prusa:
https://www.prusa3d.com/cs/produkt/main-plate-set-mmu3/
and replace yours with it. The new one is made with better technology from a different material, because your original part that you have mounted is really very careless. Don't worry that it's a part for the MMU3, it fits the Nextruder very exactly, just don't forget to insert the rubber ring into the part, it is used to seal the gearbox so that dirt does not get between the wheels.
RE: Immediately severely clogged after only 2 test prints
It is probably irony of the gods out there after me posting about galaxy black but my printer clogged again .. this time with the blue PLA.
Same exact issue ... completely clogged and had to dissamble the whole thing again to be able to get it out ... took me 2 trials - with first attempt it broke off leaving only a phew millimeters left to try to grab upon .. it took me over 15 minutes with lots of swearing and constantly heated up to 290 degrees - not me but the nozzle - to get some grips again ... then I was able to pull it out. 5 cm again ...
Is this part of 'PLA 3D print life for advanced users' or is this becoming a CORE one problem ?
As stated before, I never ever had any clogging issue with my MINI+ ... which is 5 years old and cost me a thirth of this beast.
Thanks,
Steven
RE: Immediately severely clogged after only 2 test prints
I had a further chat with the support and we looked at the printed figure m3f project.
The engineer found out that my PLA temperature was set to 215 while apparently it should be 230 for the Core One. This could be the reason, according to the engineer, that this clogging might occur.
The PLA temperature settings is a bit strange in the sense that I did not alter anything as far as PLA is concerned. Now I think what happened it that PrusaSlicer just used the 'default' PLA I had been running before for my MINI. But there are no warnings whatsoever that the temperature is too low for the printer & material combination .. that would have been nice to be honest.
Anyways, again something new learned and I will bump up the temperature and hopefully this remedies now the issue ...
RE: Immediately severely clogged after only 2 test prints
I'm having this problem too. I waited an hour for a support representative today, but no dice. I don't want to take this apart without them knowing I had to. I paid 1300 and waited 3 months for this bleeping thing, they're gonna be made aware and make this right.
Keep me updated please.