Hi there!
I’m trying to do flow calibration for the Devil Design PETG filament.
I did the flow and pressure advance calibrations beforehand. I’m using a fresh roll straight out of the package.
I’m seeing strange surface finish at low flow rates, say up to 10 ccm/s. I mean the stippled surface visible at the bottom half of the print in the pictures below:
My filament settings so far:
Any pointers to what I should do to get rid of this?
I think your filament was wet, or at least the outter layer of the roll was wet badly.
What @simon14 said as well as a question:
What are the recommended settings for Devil Design? The values posted seem way off from what I’d expect for PETG. Starting at the price…
I didn’t expect filament straight of the sealed bag to be dehydrated, but will try drying and report back.
The settings were copied from PrusaSlicer, some from the datasheet of the manufacturer. Price reflects what I pay for a roll in my local currency…
@EnoTheThracian, any general directions for tweaking towards better settings?
It really seemed to be wet .
But the consistent errors could also be due to some settings, like the speed of printing the outer wall.
maybe to fast?
Sorry I asking here! But I want also ask a own topic but I does not see the button for new topic ! Can somebody help me please?
lg Katha
Well, opinions and experiences differ wildly when it comes to PETG. In my case, living in a marshland, humidity is a big topic for PETG. So for me, drying is a must.
Afterwards, there’s the specific blend to consider. While I have not seen nearly as many issues on the forum from HF variants than from Bambu’s Basic PETG, I still have a large stock of Basic PETG to run through.
For that, I keep all speeds at or below 100-120 mm/s and reduce all accelerations to 25% of defaults. When also copying over the Generic PETG cooling settings and enabling wipe during retract, I usually manage to get good, intricate prints. Even overhangs work well but I do tend to use supports for those (dissimilar material support: PLA interface for PETG). Slow Down for overhangs was initially a no go for me (due to the rapid speed changes showing prominently) so I dropped all printing speeds to the lowest settings. Nowadays, the additional smoothing option should ameliorate this.
So with a non-Bambu, maybe not HF variant, I’d start with those settings to get success early and, if indeed successful, then tinker around to see if I can get the same quality at higher speeds.
