Test Prints
But now to the most important thing, the print quality. We start with the all-in-one test from the difficult-to-print Silk-PLA:
And directly a second one from Geeetech High-Speed PLA in gray:
As you can see, steep overhangs and fast speeds don’t get along well. Even with the massive cooling, there are problems here. I would definitely recommend adjusting the minimum layer time to give the filament a bit more time to cool down.
The clearance test with gold Silk filament gave excellent results. The center, 0.50mm and 0.40mm cogs were completely free to move. 0.30mm was directly movable with light pressure, 0.20mm was slightly firm but still movable. The 0.15mm part was releasable with medium pressure and then movable.
Thanks to the double motorized Z-axis, which is also synchronized with a belt, there were no significant artifacts in the Z-Wobble test. Print time was 46 minutes and 5 seconds at 75mm height.
And this is what a Benchy looks like with the Elegoo slicer and “0.2mm normal” profile, printed in 39 minutes and 38 seconds:
In PrusaSlicer I also just tried to apply all the settings and create a custom profile again. This didn’t really work, the print time is with 59 minutes and 12 seconds significantly longer:
On the included USB stick there are also two Benchy G-codes, so already presliced models. Here is the one with 24 minutes and 21 seconds printing time:
To top it all off, the G-code for an 18 minute 0 second Benchy is also included. Absolutely crazy time for a “bed pusher” printer. Looks like this then:
Self 18 minutes 0 seconds G-code, but Geeetech High-Speed PLA:
You can already see it on some models, but here I wanted to make it especially clear again. Due to different layer times, it can happen that the filament becomes rather matt or glossy. Here the Voron Cube v7 in 200% size and 5% infill as an example:
And lest anyone complain that nothing “useful” ever gets printed, here’s my new mini desk drawer printed in Extrudr PLA NX2 White.
And a case for the OpenDTU receiver of a Hoymiles inverter, printed in Janbex PLA Yellow.
For those, I dabbled a bit with a custom PrusaSlicer profile, but the results didn’t really satisfy me. But since these were purely functional parts, it doesn’t really matter.
Overall, the print quality is good from the factory, but it would definitely be worthwhile to adjust its profiles per filament. Otherwise, the Neptune 4 tends to stringing and over-extrusion.
With the help of the Flow Benchmark website, I also tested how much throughput the hotend can handle. From about 5% reduced extrusion, you will see artifacts in the print image at the latest, but thanks to the extended nozzle, a good value can be achieved at higher temperatures.
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