OK. Dunno what I'm doing wrong. But this is what I get from overhangs. 200C, 60C bed, 4028 fan on 50% overhang printed at 33mm/s
Any questions, anything, I can add. please, shout ..
It's like the PLA "doesn't stick" ..
#PLA overhangs are utter mess
deep viper
jaunty tendon
Would be great to have better pictures, I can't figure out anything on the current ones
First one is vertical wall, isn't it?
deep viper
I'll post better ones. Yep, the first is outer wall, so effectively "top surface", second is inner wall, so "overhang" if you will, though the slope is 45deg ...
deep viper
jaunty tendon
Ok, if I understand correctly, the issue with wall angled 45 (or so) degrees to heated bed, it is bad both inside (overhang) and outside (external perimeter). Is that correct?
Hot thick this wall? Home many perimeter? Can you show it in slicer?
deep viper
correct. four walls on the slope. the overhang one has fan turned on..
part of the slope for reference
jaunty tendon
Outer wall first? Can I get the link for the model? Interesting to check it in the slicer. Overall, this design must be problematic, I would try to crank cooling to maximum
deep viper
I tried both inner-outer and outer-inner. Inner-outer turned out tiny bit better. But 💩 nevertheless.
https://www.printables.com/cs/model/296322-v-core-3-12038-static-cooling-fan-mount
deep viper
I'm trying now with #v-core-3-mods message as a test. starting at 200C, 60C bed. 30% fan on all the time, ramping up to 50% for overhangs, 5 second run-up, 0.2 sec kickstart. The rest is Orca defaults for RR500. Wish me luck.
Same thing.
deep viper
I'll increase the fan speed next. But I find it ridiculous. Compared to my i3 it blows million times more, prints the overhangs at even slower speed and this is the result 😔
kind crescent
Lower the temperature a lot just to make sure it is not that...
deep viper
190 fan 50; 190 fan 70; 200 fan 80 😠 I can't believe I have to go full blast on PLA at these speeds. At full tilt, fine, but at 11mm/s on overhangs ?? Disappoinment barely describes.
jaunty tendon
What speed you talking about?
How fast plastic cools is not about speed, it is about layer time
deep viper
11mm/s for overhangs. the rest is default..
in fact, here's the settings.
You reckon this could help #eva-mods message ?
jaunty tendon
Have you tried different filament?
deep viper
It might be filament in part I guess. I just tried printing at 80-100 fan for anything over 30deg . It looks decent then. I just find it ridiculous that I need such a volume of air for PLA. Sadly, with the results, I'm considering CPAP 😒
I'll try with different filament tomorrow. But don't have any other brand at hand, just different colors. Have some on order, so I guess I'll have to wait for concrete results a little longer.
deep viper
OK. filament brand makes no difference. Unless I go full blast on PLA overhangs they look horrid.
quasi karma
same issue
did you get aroudn this ?
i find it hard to believe that a 4028 is not able to cut it and yet i'm here
deep viper
In the end I changed the original nozzle for the one with extra flow. Made all the difference. Now it's presentable. Still, have to admit, I was expecting little better. One more thing I changed. Clumsy hands killed the killer fan it came with, so I changed over to Arctic 4028. It's much quieter, so it can run at faster baseline speed without too much annoyance. Full blast speed is lower, but honestly, I think the original fan is a bit overkill at the top end.
Oh. And one more thing. Ticking that Classic Mode box sometimes helps. Sometimes being the key part there..
quasi karma
i have a high flow nozzle already lmao
i dont understand how a high flow nozzle would help with overhangs
deep viper
Fan nozzle....
quasi karma
wait
whats a fan nozzle
you mean the duct ?
are you using the tri horn duct now ?
deep viper
Brainfart on my end. Sorry.
quasi karma
if not do link me to something
deep viper
Correcto mundo.
Tri horn is the thing that i believe did it for me. Through i did change the fan at the same time. But again, it's gone down in volume and speed, so that shouldn't be that...
quasi karma
one thing that i'm considering is fan "lag"
sometimes your fan wont go to max as its demanded
setting a global max might help test this theory
deep viper
You can set spin up time in slicer, so it kicks off before it needs to