Hi folks. I obtained a pre-owned Anycubic Vyper. Alas, every print features defects in the surface as shown in the picture. It occurs in any type of material. Does anybody know the source of this type of defects?
What causes this type of surface defects
25 Comments
daannii@lemmy.world · 38 pts · 35d
Wet filament. Or. Bad filament.
Those are bubbles. Try a dryer.
FuglyDuck@lemmy.world · 8 pts · 35d
This is also my take on it.
FUsername@feddit.org · 6 pts · 34d
I already got myself a dryer as I suspected that. But this occurs in multiple filaments, brand new and older ones, different brands. To me it somehow feels like this is not the root cause... But I'll keep an eye on that.
daannii@lemmy.world · 1 pts · 32d
Do you live somewhere humid right now?
FUsername@feddit.org · 2 pts · 32d
Central Europe. I'd say it's not too bad, but the printer is in a basement which tends to be humid...
ivan@piefed.social · 19 pts · 35d
My guess would be hotend not feeling so good. Those white spots look like result of temperature changes.
If you can read hotend thermistor data somehow (OctoPrint, for example, shows a chart for that) and see lots of sudden ±2-5°C changes - that'd be it.
FUsername@feddit.org · 5 pts · 35d
Yeah, that's what I observe in octoprint. Do you also know how to fix?
fluxx@mander.xyz · 7 pts · 35d
This might be thermistor losing contact with the block or wires losing contact. It can also be the heater wires losing contact somewhere. To diagnose, you can try and wiggle the wires when you preheat the hotend and watch the temps. Then you will know what needs replacing. I once had a thermistor that was faulty, I replaced it, the problem went away.
deepfriedchril@lemmy.world · 4 pts · 35d
You can try running a PID tune on the nozzle and see if that helps.
FUsername@feddit.org · 4 pts · 34d
Unfortunately, the temperature variation still is above 3° C.
FUsername@feddit.org · 3 pts · 34d
Ok, I never heard of that and read into it. As this is there easiest thing to do, I'll do this ASAP and see of it works.
wizzor@sopuli.xyz · 3 pts · 35d
Replace the resistor and temp sensor. I would also replace the hot end itself, at least for my printer it was like 10e
FUsername@feddit.org · 1 pts · 34d
Weeeeeeell the last time when I tried to replace the hot end, I screwed up so hard the printer was not usable any more after that 😂
wizzor@sopuli.xyz · 1 pts · 34d
How...? Mine is literally 2 bolts and the bowden tube retaining bolt? Plus of course the sensor and resistor cartridge. I have no experience of direct feed hot ends tho.
FUsername@feddit.org · 1 pts · 34d
Guess I have been repeatedly too stupid to buy parts up to specs and then trying to solder them together, which failed. By that, I destroyed the original equipment and got no working replacement in place.
Thorry@feddit.org · 10 pts · 35d
Did you dry your filament? How old is it? Did you get all your filament pre-owned as well? Depending on the kind of material, it has a limited shelf life, once you get beyond that it won't ever print right.
Try some brand new filament and see how that works.
FUsername@feddit.org · 2 pts · 34d
The filament is brand new, I also tried other brands and types of different age so I assume it is independent of the filament.
sobchak@programming.dev · 9 pts · 35d
I got results kinda like that before when I tried a Volcano on an old Bowden style printer and printing wet PETG... Tons of oozing.
FUsername@feddit.org · 3 pts · 35d
Well, the PETG is brand new and I use a heated chamber for the filament, so I really hope this is not the case. But as the setup sits in a basement, I'll try to check that, too.
cepelinas@sopuli.xyz · 4 pts · 35d
Do not underestimate PETG's moisture absodbage it can also get too wet (theoretically, personally hasn't happened but I don't keep my filament for long before printing) if it is even sealed as most bags aren't 100% airtight IIRC.
FUsername@feddit.org · 1 pts · 34d
That is true. That is why I bought that filament drying chamber. I'll keep an eye on that.
chiliedogg@lemmy.world · 1 pts · 15d
Did you listen to it print? If it's really wet sometimes you can hear a cracking sound as the moisture boils off. It causes little steam pops, which also result in that scrappy surface finish.
FUsername@feddit.org · 1 pts · 6d
Yeah I keep an east on the print at times, but I don't hear that noise. But I am aware of it from prior endeavors with wet filament
manateemilitia@slrpnk.net · 3 pts · 35d
Does the filament exiting the nozzle make a popping sound while printing? Def looks like wet filament (I have absolutely received PETG "wet" in a sealed bag w/ desiccant) but if you to go after the thermistor and heater cartridge I recommend ordering extra, it's a good part to have on hand.
FUsername@feddit.org · 2 pts · 34d
Well, I know that popping sound after having a one year long print hiatus, and cannot hear that while printing now. Thank you for the recommendation of ordering two!