I’m now playing around with “serious” materials – as opposed to PLA 
– and looking to run some PETG+CF. Anyone been down this path and have any advice?
Elsewhere in the forums I see that I will need a hardened steel nozzle and adjust the temp. Any other tips?
The Sovol steel nozzle has kinda not-positive reviews. Perhaps advice on a different vendor that works well?
If I recall correctly, I hear they use a MK8 nozzle. Plenty of suppliers of those.
I suggest PET-GF or CF. You can do 320C nozzle with a Max all day long, although I have found 90C is the limit for the bed due to where the 130C overtemp switch is mounted…
Didn’t have any issues with nozzles that came with my max, but it didn’t come with anything but 2 .4mm, so I broke out one of my mk8 nozzle assortments for a .6 and .8… I was just about to give them to a friend as I converted my highly mutated Ender 3 to West3d tungsten carbide volcano nozzles, didn’t expect mk8s, worked out. Have found that nozzles with skinny points tend to accumulate fewer blobs of filaments, but stuff like petg and pctg wants to stick to everything.
Good info. Appreciate it.
I came across a youtube video a while back that said adding CF to PETG or PLA is snake oil. In addition to the usual breakage tests, the guy used an electron microscope to analyze the actual bond between the CF fibers and the plastic, finding the plastic shrank from the fibers as it cooled, leaving voids.
He found Nylon holds onto the fibers though. Not only makes the part stronger, but also helps control the warping that nylon is famous for.
Very interesting. I will dig around myself but if you have a link to that video plz don’t hesitate to share. Ty.
