I got my first spool of nGen today and did some tests. Very mixed results, your comments are welcome:
First, a layer bonding test (Thingiverse Object). One of the advantages of nGen should be very good layer bonding, especialy thin cylinders break easy with PLA.
Orange is PLA, blue is nGen. There are two nGen tests, because my first test part broke very easily inside the cylindrical part itself where the PLA one wasn’t breakable without pliers. So I printed a second one with fan speed limited to 50%, now it’s rock solid. nGen doesn’t like too much cooling.
As you can see, the PLA peeled off on the top layer whereas the nGen ripped off all 3 top layer completely. Nice one!
But, as you can also see when zooming in, there are some gaps in the blue parts and signs of over extrusion in other places. It seems that nGen has serious problems with higher print speeds, also the infill comes out more stringy than the PLA one. That’s very bad…
Second test was overhang and curling edges. Both parts are printed with 0.1mm layer height, exact same settings. Every 3mm in height, the angle lowers by 5 degrees, starting with 40. Both prints failed at 25°, but nGen has a sudden change in quality while PLA has a more smooth transition from “good” to “bad”. Much more intresting is the corner from the vertical wall to the overhang area: While the PLA starts to curl at 35° (which renders the achievable 25° overhang unusable), nGen has a clean edge until 25°. nGen is the clear winner here.
Last but not least, I have strange looking cold pulls with nGen:
My PLA pulls come out clean every time, the nGen pulls have always a black ring where the heatbreake is. No idea why, maybe leftover from PLA prints? But in the meantime I used ~2m of nGen, still looks like that…
Result up to now:
- Very good layer bonding
- Very low tendency to curling edges, so hard overhangs will come out much nicer, especialy at low layer heights.
- Top surface quality is bad, voids between perimeters, sometimes small gaps in top infill (I printed 3 test cubes, it varies but don’t know why. Nozzle is clean). Nogo if I can’t work around that.
- It’s 2x the price from eSun PLA. If the quality problems can be solved, I think that’s OK for prints like figurines where overhang angles are a problem or if you need the strength.