Stuck Filament Detected - suddenly and now very often.
After about five month with my MK4S printer I´ve got problem for the first time - Stuck Filament Detected. Some history of my latest time of printing:
I tried to use TPU95 and after some initial problem with filament feeding it worked very well and after about 10 -15 prinouts with TPU I go back to PLA (I always have used PLA before and now again). When I used TPU I installed a new nozzle and after my TPU print I put back my "PLA-nozzle". When I look at history it say 26 psc of sucessfully printouts with PLA after my TPU print and suddenly I got Stuck Filament on one print I have done earlier about 5 or 6 times. I changed to a new nozzle and it worked very well (same printout) and after one good print it was same again with my next print - Stuck filament after about 2,5 mm print. (about 12-13 layers)
It looks like problem will start at same layer very often.
There was a tips that it could work with disable filament stuck sensor so I tried this on a new printout with bad result. Sometimes I could hear tick-tick from filament feeding and could notice it was very bad result at that time.
I have tried with different filaments so it does not depend to a specific roll of filament.
If printer stops with Stuck filament and turn off heat after 30 min I can unload filament with unload command but loading will not work, the nozzle are totally clogged. I made a "nozzle cleaning station" with my spare hotend and an extern 24V power, using my multimeter for temperature. Going to 250 C and use pressured air for cleaning together with an 0,3 mm needle. Working very well.
I have updated both slicer and printer to latest vesion.
Yesterday I made a small print wich worked but not with good finish.
The bad thing is that I did not downloaded slicer setup from time when it was working very well, is it possible to get a "default" working setup from anywhere?
I will try to make a printout wich is old and sliced a few months ago to see what happen.
Does anyone have any good idea for me to solve this problem?
Sorry for my bad english and best regards
Tage W.
RE: Stuck Filament Detected - suddenly and now very often.
A little more info, I made a total cleaning of extruder and mounted it again according to all instructions, some small dirt there but nothing that would have affect. Made a new try to print, this time I used file for Prusa Nozzle Tool. Printed very well 4,6 mm up from bed and then it stops - Stuck Filament Detected.
New print in this evening with mobile in my hand to get a film of everything, cleaned nozzle, printing very well up to 3 mm from bed - stop - Stuck Filament Detected - no possible to reload and load filamet again so I had to stop the print.
Now I don´t know what to do, it´s not possible do make any printout it looks like.
Whwn I unload filament it is in the end about 2,1 mm diameter at about 6-7 length. It feels like it will melt to long up in the tube. When the nozzle has cooled down it is possible to put in filament in tube as long as to the middle of copper part on tube, is that normal or has it melted to long up in tube?
Any ideas that could help me?
BR Tage W
RE: Stuck Filament Detected - suddenly and now very often.
Hi Tage,
after months of good print (and I do not print as a farm) yesterday my MK4/S suddenly I got the infamous STUCK FILAMENT DETECTED, and it was accompanied by a click sound.
History:
- two days before I used for first time a PRUSA PETG V0 with flame retardant. I could not find it on the filament list, and it was marked as not compatible with my hardware. I played around with the PrusaSlicer configuration and then I decided to ignore the issue and use the default PETG settings.
1st disaster) The print after few layers of strange blobs had giga layer shift due to nozzle collision with printed part with irregular plastic. No whatever error on the display. The MK4S did not realised about the collision, probably because the input shape disable the collision check.
2nd mitigated) I reprinted the part, and manually looked now and then at the print with a tweezer removing PETG strings and other plastic debris. The result was not perfect but acceptable.
Then I reloaded the standard Prusament PETG, but already at purge I noticed a strange light click. I printed a test very small object, and apparently there were no issues.
I upgraded to the last firmware.
I printed another small object (4 x 3 cm) and I got the STUCK FILAMENT message. Then it was a loop. Unloading, loading with lots of skip click noise, half layer, and error again. Note that you can't exist from this loop. You have just to press reset. Probably the latest FW was more sensitive, who knows.
I was aware that a 30€ HF Nextruder Nozzle was gone... but I contacted PRUSA support just to see if I could save it.
We spent 6 hours in attempt to clean the nozzle, and we got a certain success. I moved from a completely clogged nozzle to a nozzle that purged material, and occasionally cause the click sound, very lite.
I tried to reprint the object but unfortunately few layers later it detected a small click and I got the STUCK FILAMENT MESSAGE AGAIN.
Then I disabled the stuck detection and let it continue and looked how the print went. I heard several click now and then during the print, but now it did not blocked the print, and the print was finished.
Unfortunately as I suspected, the quality was very bad, with several under extruded zone here and there.
Result: six hours wasted. You can't save an High Flow CHT nozzle if it clogs. There are inside 3 micro channels around 0.10 mm and not a single 0.4 channel that you can clean with a needle.
This morning I dismounted the semi clogged 0.4 CHT nozzle and replaced it with another brand new. I reprinted the object and all was perfect.
So, don't waste your time. Just replace the nozzle. I know that they are expansive, but you can't do anything to fix. Something will stay still inside.
The big mistake was to use a HF nozzle with a material that probably had other components inside the PETG. For that it must be used a normal 0.4 nozzle , not HF, otherwise the risk to clog it is high.
And by the way I realised also I did not had other spares 😮 . So today I purchased from PRUSA several new HF Nozzles. 😆
Regards
RE: Stuck Filament Detected - suddenly and now very often.
Thank you for your answer. Now I have a little more information about what I have done.
Because I was thinking that filament was melting in the tube I tried to take down printing temperature about 10 degrees. My filament box said printing temperature 190 - 220 C. and I was already up at 230 - first layer and 225 for other layers.
I also tried to change printspeed to 75% but that was not successful. When I took down temperature, one small print was working so I was thinking "there it was" and started a bigger print and after a few layers Stuck Filament Detected and I was back deep on the earth.
New nozzles did not help for me.
Then I started the big printout with temperatures that was good moths before 230 - first layer and 225 from second layer. I was staying beside printer and could see first layer printing good and at second layer, very soon there was a disturbance and I could hear some tick-tick and print stopped with Stuck Filament Detected.
I started same printout from scratch again and almost exactly the same result, it stopped at same place. Then I was thinking if first layer are printing well with 230 degrees I will try to put a little higher temp so I set first layer to 235 and other layers to 230.
What happen now, YESSSS, every print after that has been working, 5 degrees higher and it is working. Now has even my bigger print been working, for the moment.
Now I am thinking what happend when it stopped working for me. When I was printing with TPU I changed the nozzle and when I go back to PLA I put back my older nozzle. Temperature are measured in aluminiumpart at hot end and if the tread has some small oxidation or the nozzle not are tighted so hard I am sure there will be a little bit lower temp in the end of nozzle.
So for this moment, it look´s like a 5 degrees higher temp was the solution for me - at this time.
BR Tage W.