vcore 3.1 PACF woes
Seem to not be able to get this PACF to print nicely. I've used this same filament in my k1 just fine.
VC3.1 with a rapido 2f, 0.6 tungsten nozzle.
I've tried temps from 250-300C, seems to be better on the lower end. The walls print fine, though there's some blobs likely due to ooze with the UHF adapter and 0.6 nozzle. I don't mind those as much as the apparent over extrusion on top and bottom layers. I've got the extruder (orbiter2) rotation distance calibrated, and flow rate is 1.0/100% in orca.
6 Replies
I have my first layer and top surface line width set to 0.7mm, will try 0.6
The blobs on the walls are from overextrusion, same with the top. You need to tune extrusion multiplier (called flow in some slicers).
The most common method is the one from https://ellis3dp.com/Print-Tuning-Guide/articles/index_tuning.html (print those patches). You'll probably have to use SuperSlicer for it as the other slicers can't use a custom em for single objects. After tuning it you can switch back to Orca or whatever and try it there
Why would it only be happening with this type of filament?
You need to tune every filament, PA is very sensitive to moisture and needs to be dried even out of the bag half of the time.
Lots of tuning later and it's pretty perfect for me. Has some ringing but not a huge issue.
Things I did:
1) DRY! I placed all my CFPC/PA rolls in my dryer at 70c and just left it on constantly.
2) Speed and retraction. I increased retraction to 2mm on my UHF rapido, and set max flow to 18mm³.
3) Temp. This I'm not sure. I suspect my rapido 2 has the thermistor issue where it is much hotter than it says. Printing at 275 first layer, 265 after. Weird because all my other printers do CFPC at 285...
