Core One + Print Fails (Bed adhesion? Nozzle positioning?)
Hi!
Last black Friday sale I purchased a core one + printer (pre-assembled), and since then and now I probably wasted an entire roll of filament on misprints.
I made sure to degrease the print sheet with water and soap regularly, and clean after every print with IPA. I had the same failures with PLA and PETG alike (Prusament and other, but I mostly use Prusament), .4 and .6 nozzles.
Calibration passed, nozzles were swapped with the nozzle + sock tool and I think I am doing maintenance in the correct way. I'm on the verge of asking to ship it back under warranty since I wasted so much filament, time and patience on trying to figure out what isnt going as it should.
Printing seems hit or miss, even with a brim for extra bed adhesion. Smaller objects succeed more often than big ones.
I assume that it's not normal to have a high failure rate (where around 40% of what I print fails).
Any and all advice, tips and tricks are more than welcome.
Thanks in advance,
Cheers,
Käy
RE: Core One + Print Fails (Bed adhesion? Nozzle positioning?)
I managed to carefully remove the spilled plastic from around the heatblock without damaging anything, calibrations passed again. Printing a benchy now to see how that comes out.
RE: Core One + Print Fails (Bed adhesion? Nozzle positioning?)
This is post-blob, made sure the nozzle was clean and secured, checked belt tension just in case and ran all calibrations.
Printed 3 benchies (via easyprint) in between to see if it made a difference, and now I'm getting some odd warping on one side of the benchy, as well as near the bow.
I'll slice one with Prusaslicer to see if that fixes it. If it doesnt, what is left to check/try? Any and all advice or help is much appreciated.
How are you cleaning your print-sheet(s)?
Those Benchy flaws look like cooling issues, you may have damaged or displaced a fan shroud during your blob-of-doom event, it's probably still working well enough to print a replacement.
cheerio,
RE: Core One + Print Fails (Bed adhesion? Nozzle positioning?)
What kind of nozzle is it? Would it happen to be a V6 nozzle? That is the nozzle is separate from the heat break tube?
RE: Core One + Print Fails (Bed adhesion? Nozzle positioning?)
Hi Diem!
I clean them with water and soap occasionally, and with IPA 90% before each print just in case, with a microfiber cloth.
Thanks for the suggestion! I'll check the shroud to be sure. A custom sliced benchy printed a lot better than the easyprint variant on the pictures.
Can the shroud be printed in any filament for it to be usable? Or does it need to be heat resistant?
Cheers!
RE: Core One + Print Fails (Bed adhesion? Nozzle positioning?)
This was with the default 0.4mm nozzle. Not sure what you mean by "separate from the heat break tube", it's one of those long nozzles with a copper bit attached.
RE: Core One + Print Fails (Bed adhesion? Nozzle positioning?)
This was with the default 0.4mm nozzle. Not sure what you mean by "separate from the heat break tube", it's one of those long nozzles with a copper bit attached.
There are 2 types of nozzles compatible with the Nextruder. There is the "standard" setup where the nozzle is attached to the heatbreak tube and the "V6" setup where the heatbreak tube and nozzle are separate. In the later case both screw into the heatblock. Care needs to be taken that the nozzle is tightened only when it is hot otherwise filament can leak out and create a "blob of doom."
According to: https://www.printables.com/model/1167816-core-one-printable-parts/files
Recommended material: PCCF
But you would probably do better in two stages, one in PETG to get a slightly better air flow followed by the working copy in PCCF - and with that, print another for the spares box.
Cheerio,
RE: Core One + Print Fails (Bed adhesion? Nozzle positioning?)
I can't tell exactly but it sounds like you aren't slicing the models yourself. IMO, slicing is printer-specific and I'd never try to print anything, save for a premade temperature tower, that I didn't slice myself. That way I know it's sliced for my nozzle, my filament and the speed and temperature I want. Print success should be near 100% for most things, though I admit to a lot of redesign before I'm happy with anything.
RE: Core One + Print Fails (Bed adhesion? Nozzle positioning?)
I can't tell exactly but it sounds like you aren't slicing the models yourself. IMO, slicing is printer-specific and I'd never try to print anything, save for a premade temperature tower, that I didn't slice myself. That way I know it's sliced for my nozzle, my filament and the speed and temperature I want. Print success should be near 100% for most things, though I admit to a lot of redesign before I'm happy with anything.
Hi! I usually slice the models I print myself, sometimes I print via the Prusa app with easyprint, which has more limited slicing options afaik than the desktop application. Ideally the success rate is higher indeed. Hopefully I can get closer to 100%.
RE: Core One + Print Fails (Bed adhesion? Nozzle positioning?)
I'll try PETG first before ordering PCCF (I suspect I need a hardened nozzle for that as well.). Thanks for the advice!
According to: https://www.printables.com/model/1167816-core-one-printable-parts/files
Recommended material: PCCF
But you would probably do better in two stages, one in PETG to get a slightly better air flow followed by the working copy in PCCF - and with that, print another for the spares box.
Cheerio,
If you don't have the filament and nozzle to hand the part is available via the link at the top of this page.
Cheerio,
RE: Core One + Print Fails (Bed adhesion? Nozzle positioning?)
Thanks! The shroud seems (optically at least) fine and unharmed by the blob event.
after printing something smaller without problems it seems I’m back again to square one when I tried something bigger. Could it be underextrusion? I’m considering either getting a new nozzle to try (and using them exclusively for one type of plastic only) or getting in touch with customer service, since I have to throw away so much wasted filament so often. That’s not normal right?
(Closer image in next reply, typing from my phone now so only one attachment per post allowed)
RE: Core One + Print Fails (Bed adhesion? Nozzle positioning?)
Closer up image. Same artefact is on the support, leading me to believe that that might cause it to break more easily causing the print to fail.
RE: Core One + Print Fails (Bed adhesion? Nozzle positioning?)
I'm in touch with Prusa Support, unfortunately it takes quite a while to get a reaction. So far no luck. I am considering sending the printer back under warranty as it doesn't function as intended.
RE: Core One + Print Fails (Bed adhesion? Nozzle positioning?)
I'm in touch with Prusa Support, unfortunately it takes quite a while to get a reaction. So far no luck. I am considering sending the printer back under warranty as it doesn't function as intended.
Can you run the manual belt calibration and check the belt tension? It could be they are too loose.