3DPrinting
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I haven't tried pushing the speed yet. I've been playing with multi-color and multi-material prints, as well as long tall thin prints that were kind of impossible on the Mk4. And when I'm not playing with that, I'm running it almost 24/7 because I have to produce sets of parts for our production floors asap and each set takes about 20 hours.
But soon the machine will be more available and I'll play with it some more.
Speed on a core-xy, especially acceleration, can be a ton higher than a bed slinger. I have a 350mm^3 Voron keep a 0.6mm nozzle on it, and print with 0.9mm line width and 0.3mm layer heights. I have a Rapido HF and volumetric flow winds up being my bottleneck most of the time.
Also note that when you're going fast, material matters a lot. I can melt ASA faster than PLA/PETG. But... ASA can be a bit more melty so things like overhangs can suffer. And the whole needing a heated chamber thing.
Was just thinking that if the goal of your video was to showcase the difference between the bed slinger and the corexy, then it would've made a stronger point if you took advantage of its full potential. The MK4 even looks faster in the video, but I suspect it could be the angle and that the bed moving making its motions more visible.