# Blog · 24 December 2024 · 1 min read

An ERCF v2 for the printer: the third device on the CAN bus

I built an automatic filament changer, and the printer looks more and more like a modern car.

I built this thing for the printer. In short: an eRCF v2 (enraged rabbit carrot feeder), an automated filament changer for the printer.

Red and black ERCF filament changer sitting on top of the Voron printer

The mechanics are assembled, I spent several days printing everything it needs, and here it all is together. The new electronics respond over the CAN bus, which makes the printer more and more like a modern car: several devices (this is already the third!) talking to each other over a CAN bus, and a head computer controlling the whole thing.

Still, I have a feeling that commissioning will take about a month, if not more. Compensating for all the unevenness of the printed parts will not be easy. And in places I can plainly see how crooked it is, unfortunately :(

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