Hello, I've got the same issues like many users here with the e3d v6 3mm direkt drive and PLA filament. I'm Printing with a e3d V6 direct driven by a bulldog xl. At the beginning of the print everything looks fine and after about a half an hour everthing is clogged and the filament is stuck. So now when I've visited the e3d page I saw the new Vulcano upgrade and i wonder if it could solve the problem of pla Jamming. Has somebody tried it out yet?
Pull out your PTFE tube from the extruder and taper the end at a 45 degree bevel. Follow examples here: https://www.youtube.com/watch?v=EeodB0vf9Nk#t=33. Should solve it.