PLA overhangs are utter mess
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" ..
34 Replies
apparent-cyan•11mo ago
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?
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 ...
apparent-cyan•11mo ago
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?
correct. four walls on the slope. the overhang one has fan turned on..
part of the slope for reference
apparent-cyan•11mo ago
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
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
Printables.com
V-Core 3 120x38mm Static Cooling fan mount od autora NecroDavid | S...
120x38mm static cooling fan duct for Rat Rig V-Core 3/3.1 | Stáhněte si zdarma 3D modely ve formátu STL
I'm trying now with https://discord.com/channels/582187371529764864/878965315596349490/1133613346818629714 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.
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 😔
Lower the temperature a lot just to make sure it is not that...
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.
apparent-cyan•11mo ago
What speed you talking about?
How fast plastic cools is not about speed, it is about layer time
11mm/s for overhangs. the rest is default..
in fact, here's the settings.
You reckon this could help https://discord.com/channels/582187371529764864/951978948718366730/1027181257341276181 ?
here's the speeds from slicer:
