Nozzle cleaning fails with PA - system Crashes and overall absolutely horrible user experience for the price
Dissapointed. Too many bugs in the software. Machine is 2 weeks old.
Contemplating returning it, but not sure if I can get reimbursed for the taxes paid (paid to fedex, provincial tax about $300). Huge loses if thwt is tbe case, I could buy another printer with that money. At this point, this is the only thing stopping me from returning this machine.
This machine is far from set and forget experience I am used from my A1 mini. Sure the core one has very good quality when it does work. BUT I have spent countless hours babysitting many parts of the printing process with a machine that costs 5 times more. I am about to give on this. I dont have time to wait for firmwsre updates and look at the machine for 30+ watch the nozzle clean countless times and finally fail.
This feel like an unfinished product and should have never been sold. Its plagues with bugs and the marketing used to pitch feels like cheap lies.
I seem to love it when it works! But so far this has been an abusive relationshio between this peinter and I. She hates me, gives me lots of issues and then does one thing good and get optimistic she will get better. It does not.
Today, woke up to a 10 hour print that was ruined after the nozzle thermistor died 2 hours from finishing the print. The printer continued printing midair with a clicking nozzle (cold nozzle), hence no filament came out.
At this price I expect absolute top shelf quality but I feel this is hobbyist at best. Absolutely unfinished.
Ill give this printer one more week, then back to Europe it goes.
Proof of absolutely everything I just mentioned is below. Videos.
I hope that someone from Prusa can reach out to me on this. I am ready to give up and go to the competition that I did not want to gve my money too. But at the price, I am not seeing the famous Prusa quality. Sorry
Video here nozzle cleaning fail
https://photos.app.goo.gl/vKyREAdPoopWobwr9
Then total system crash and blue screen:
https://photos.app.goo.gl/qdDZhd5bjyXPLv857
And print mid air printing, nozzle clicking plus my own ranting:
https://photos.app.goo.gl/PxG7kv7LsAfwwCFH9
RE: Nozzle cleaning fails with PA - system Crashes and overall absolutely horrible user experience for the price
I watched the mid air printing video you linked to and it's making the same clicking noise mine is making. The filament is stuck in the extruder. Hopefully someone has a suggestion for troubleshooting the stuck extruder problem I posted about earlier today. I'm new to this and could use some suggestions as to what to look for.
RE: Nozzle cleaning fails with PA - system Crashes and overall absolutely horrible user experience for the price
Is that with the latest firmware? So even with the filament retracted there's enough in the nozzle to repeatedly ooze out while nozzle cleaning?
I hope that someone from Prusa can reach out to me on this. I am ready to give up and go to the competition that I did not want to gve my money too. But at the price, I am not seeing the famous Prusa quality. Sorry
Video here nozzle cleaning fail
https://photos.app.goo.gl/vKyREAdPoopWobwr9
RE: Nozzle cleaning fails with PA - system Crashes and overall absolutely horrible user experience for the price
that was not clogged nozzle actually. the thermistor died in the machine mid print, the machine stopped heating the nozzle and therefore it could not extrude. The machine never stopped and would have continue doing that until the print job reached 100%. I was lucky to have a spare thermistor and got it running again.
For a clogged nozzle, try first heating up to 300 then manually extrude, see if you can clear that way.
RE: Nozzle cleaning fails with PA - system Crashes and overall absolutely horrible user experience for the price
yes. This is the worst cleaning procedure I have seen in a machine. It is making my A1 mini look like a Ferrari, granted not the best quality out of the A1 to be honest, but it never ever failed due a nozzle cleaning procedure.
RE:
the issues continue. Spent several hours with Prusa support today, first to address the failed thermistor, then, to try to address the myriad of calibration issues, including the bed fail before every print and nozzle cleaning issues.
The machine is using the correct filament for the correct bed, and everything works as it should what I mean is : Of course everyting is clean before sending to print and all filament is dry.... 🙂
The machine had, during my conversation with support, the firmware reinstalled and flashed. I had to reinstall everything, set up wifi again, add to prusa slicer because according to support: the new firmware does this sometimes, it will be fine after. NOPE.
The machine just did 3 bed calibrations attemps, failed all of them. here is a picture of what the bed looks like after this. The nozzle probing marks are seen all over the bed.
At this point I have lost total faith in this brand and this machine. Huge disappointment as I was really wanting to like this brand and move away from other throw away designs filled with tech that is hard to maintain or repair.
I am happy with certain aspects of the Prusa Core One, but the excessive baby sitting and the bed failures as well as certain nuances of the bed calibration (really living specs of filament all over the bed is the best we can do here???), makes this really a very printer to utilize in a business setting. This machine was bought to produce parts non stop and with little supervision. I bought on Prusa name but I am starting to think that this was just fake cheap marketing and fanboy-ism...
As I type this message, the machine just went thrugh 4 bed calibration, in between the bed was cleaned, because somebody has to remove the annoying specs the nozzle leaves as 'normal' part of the process.
I am mad now, especially being in Canada, returning this to Prusa is going to be extremely expensive and slow.
I believe this machine is still in development and should not have been offered for sale. Too many bugs.
The machine is unusable with the filaments I am tring to run through it (Polymaker FIBERON) and yes it has the hardened nozzle. Unacceptable.
This is extremely irritating.
RE: Nozzle cleaning fails with PA - system Crashes and overall absolutely horrible user experience for the price
Even after a full firmware reset. factory reset, total re calibration, adjusting nozzle, checking EVERYTHING. This is what a bed looks like during bed csalibration before prints. This is not only is slow but is also a terrible way of calibrating the bed. All this material will end up in the print likely ruining the first layer IF, of course, this process is ever completed.
RE:
Video here nozzle cleaning fail
In that video, it clearly looks like the nozzle is not sitting at a right angle to the print bed, but is tilted. Is that real or just an artifact of the video? It would certainly explain the unreliable nozzle cleaning and, depending on what else got damaged, the problems with height sensing (load cell probing) and the thermistor.
If it is real, how could it have been caused? I struggle to imagine that even a massive head crash could do this. Transport damage? Or did you have to work on the Nextruder, e.g. for unclogging it, and applied excessive force?
I would hope that only the nozzle is bent, above the heater. You could carefully remove it from the Nextruder to check, following these instructions: https://help.prusa3d.com/guide/how-to-replace-a-hotend-assembly-core-one_385707
RE: Nozzle cleaning fails with PA - system Crashes and overall absolutely horrible user experience for the price
Nothing was done to extruder
Its probably the video and camera lens distortion
RE: Nozzle cleaning fails with PA - system Crashes and overall absolutely horrible user experience for the price
Did you build this yourself?
RE:
That much oozing is a classic symptom of wet filament. PA, nylon, is one of the most hydroscopic filaments. If you haven’t already, dry it for 24 hours at 70C, then try printing again.
Have you tried deleting the nozzle cleaning step? In the startup gcode, you can comment out the line that does the nozzle cleaning.
;G29 P9 X10 Y-4 W32 H4
MK4S/MMU3
RE: Nozzle cleaning fails with PA - system Crashes and overall absolutely horrible user experience for the price
Nope. Dried for 2 days. Sunlu s4 and polymaker drybox. Using polymaker filament. Filament is very dry.
RE: Nozzle cleaning fails with PA - system Crashes and overall absolutely horrible user experience for the price
Not going to play programmer. I paid for a fully developed product not to learn Marlin not be thr beta testers. Prusa cab send me a free Core One and I will be willing to put the time in.
RE: Nozzle cleaning fails with PA - system Crashes and overall absolutely horrible user experience for the price
No its factory built.
This machine has been deemed defective by Prusa Support and it is going back to prusa next week I am allegedly getting a replacement but I suspect the will try to fix it this machine. I dont believe this is defective, I believe thi machine is plagued with software bugs and I was just very good at finding them. It just happens to be what I do for a living. Finding bugs. Indont get paid to fix This product. If I wanted a project I would buy something else. I also have no interest in having a machine traveling in a plane more than I did in the last 2 years while in flimsy fedex hands. No thanks.
I will likely request a a full refund as I am fed up with this. The software is clearly in beta and this machine cant compete with what is offered by Bambu. I hate to admit this, with a passion but unfortunately seems to be the sensible thing to do and thwt is going with a disposible bambu style machine.
RE: Nozzle cleaning fails with PA - system Crashes and overall absolutely horrible user experience for the price
Too bad, dude. Better luck with your next one!
MK4S/MMU3
RE: Nozzle cleaning fails with PA - system Crashes and overall absolutely horrible user experience for the price
Nope. Dried for 2 days. Sunlu s4 and polymaker drybox. Using polymaker filament. Filament is very dry.
Neither of those dryers is powerful enough to dry PA. Polymaker PA filaments needs to by dried at 100°C (by their technical datasheets). Both of those dryers go only up to 70°C. And with lower temperature the drying time grows exponentially. From nozzle cleaning video it's very clear that the filament is oozing and that means it's wet.
RE: Nozzle cleaning fails with PA - system Crashes and overall absolutely horrible user experience for the price
Regardless, bed calibration fails whit any material. it has nothing to do with the wetness of the filament. Secondly, polymaker recommends this dryer for their own nylon, which is the one used and it is not wet. And no, polymakers does not require 100C drying temperature.
RE: Nozzle cleaning fails with PA - system Crashes and overall absolutely horrible user experience for the price
If calibration fails with any material, including PLA, than something has to be broken.
I have checked technical data sheets of Polymaker PA filaments. It's 100°C everywhere. It varies only in drying time (if I remember it correctly it's like 8 to 10h depending on material). It's understendeable that Polymaker will recommend it's own dryer. But that does not mean it's good enough for PA.
RE: Nozzle cleaning fails with PA - system Crashes and overall absolutely horrible user experience for the price
longer time vs shorter time. 70 degrees over twice a many hours will get anything dry. The filament is not wet, as it prints very well when the machine works and it did work, in several occassions.
someting is wrong with this machine, no idea what.
Dried for 2 days.
In that case it's the dryer you should be fixing. That polyamide is wet.
Cheerio,