Sunlu PA6-CF
So, its my first time printing with any nylon, got this stuff cheap (I know...I know)
Anyway, after drying its seems to print fine, but Im having a bit of trouble getting the extrusion multiplier dialled in...I'm doing this because some holes in a part I printed are noticeably undersized.
If I do the Prusa extrusion multiplier test cube approach, with my EM set at 1, I'm seeing walls at around .55mm, So according to my calculations would need me to set the EM at 0.83
That seems way too low, I've never needed to go past 0.95 before, so just checking Im doing this correctly, and not making an obvious error somewhere.
Anyone else have any experience with this filament ?
RE: Sunlu PA6-CF
@hyiger I know you love your nylons..any ideas mate ?
RE:
@hyiger I know you love your nylons..any ideas mate ?
I stopped wearing them because I have to keep shaving my legs...
Depends on the type of Nylon and what it's cut with. PA6 is cheapest and if it's like other brands of PA6 it's a PITA to post process for functional parts. It's a moisture sponge so should be printed while it's drying. Afterwards annealed and if you live in a humid environment, water treated (dunking it underwater for a couple of days) if you are using it for a functional part. PA11 is very easy to work with but it's stupidly expensive. PA12 is a decent choice but depends on your application but doesn't have the flexibility of PA6. For all nylons, I've found when drying the hotter the better (85-100°) for 4-6 hrs.
I've mostly switched to Siraya Tech PPA due to better stability post print (not as hydroscopic) and better dimensional accuracy without having to spend time to dial it in I'm not in front of the computer but I believe I have it set at .95. All my rockets parts use PPA and PPA-CF.
I've dabbled with PA6-CF and PA6/PA66 copolymer and PA6-CF. For those I've have to set the multiplier to around .90-.95 after running the YOLO test that is built into OrcaSlicer. Also, I would print a calibration cube and measure the shrinkage. All of this will most definitely depend on the brand and whether or not it's CF, GF or not.
RE: Sunlu PA6-CF
Should of had more coffee before I responded. Start with a shrinkage measurement since PA6 (even with CF) has a high shrinkage rate. Once that has been added. Then do the extrusion calibration.
RE: Sunlu PA6-CF
Should of had more coffee before I responded. Start with a shrinkage measurement since PA6 (even with CF) has a high shrinkage rate. Once that has been added. Then do the extrusion calibration.
Is that just with a calibration cube ?
RE:
Usually for a new filament I do the follow:
- Temperature tower
- Better 3 axis calibration cube to get the shrinkage percentages dialed in.
- Flow Rate Calibration (OrcaSlicer YOLO test)
- Prusa Slicer Pressure Advance Test
What is really missing is an online database of these filaments with uploaded user profiles with some sort of consensus system to rank them. I've got 2 weeks off for Xmas maybe I'll take a stab at it. This is almost there but is missing this feature: 3D Filament Profile Database
And the most annoying bit of all... The Nextruder has a loadcell so why can't it do auto pressure advance and flow rate calibration?