The most striking moment in this build is the ejection itself: a finished Benchy gets swept clean off the bed by an arm that swings out from the rear right, after which the arm pulls back and the toolhead heads for the bed center. That is a proper end-to-end demonstration of non-stop printing on a Voron 2.4.
The maker built this around a CR30 belt, and notably uses the belt only to kick prints off, rather than as a motion axis the way some other belt printers do. An Octopus board drives the whole thing, with all eight stepper driver slots filled: seven handle the standard Voron 2.4 axes and one runs the belt. Levelling relies on a Klicky probe, and the toolhead is dressed in black and red printed parts on an aluminum gantry with a cable drag chain. The design targets a 300mm machine and should also fit the 350mm frame, with a print area of roughly 300 by 220 by 250 millimetres.
Not everything is solved yet. Belt flexibility makes probing slightly less accurate, so the samples_tolerance was loosened from 0.01 to 0.015, and levelling works fine apart from that. The first rolled aluminum build plate was not flat enough, leaving an air pocket that let prints wobble; a glass plate placed between the belt and the plate is holding things steady for now, while a cast aluminum plate is on the order list. With no heated bed yet, PLA is currently the only material that works.
The enclosure is still open as well: panels are not installed, and a right panel that lifts automatically after a print and lowers again is being worked out, with ideas ranging from a stepper driving belts to having the toolhead pull the panel up. One open question is whether the whole system fits between the Z rails of a 250mm Voron.
Project by CDeenen. Watch it on their YouTube channel: