The OpenSpool Mini is touted as a “universal RFID reader”, ostensibly allowing users to scan any RFID-tagged filament on the 3D printer of their choice.
Micro Magic released the OpenSpool Mini earlier this month, an open source “universal RFID reader” that reads any filament RFID tag – allowing users to easily swap between OEM-specific and third-party filament on one 3D printer.
While using third-party filament on a single machine is usually possible, making use of RFID tags with them is not, typically trapping users with their printer brand’s material if they want RFID automation to work. The OpenSpool Mini skirts that requirement. Once installed and configured, users just scan a tag to change their material settings at will – regardless of the 3D printer they are using. The device’s software even allows them to create custom tags.
That said, it appears support for many OEMs is not yet implemented, and is instead planned or “in progress”. In fact, the OpenSpool Mini currently only supports OpenSpool tags, according to the device’s product page. It’s a similar story regarding integrations with popular slicing and connectivity software, with Bambu Lab being the only product currently supported.
Speaking of Bambu Lab, the OpenSpool was released shortly before Bambu Lab’s recent announcement of a new authorization system that limits third-party printer control – a move the OEM later said could potentially be offset via a new “Developer Mode”. It’s unclear how the latter will affect the device, although Micro Magic for now states that the OpenSpool Mini will only work on Bambu Lab printers “running firmware 1.07 or older”.
The OpenSpool Mini is available as a PCB only for $11, a DIY kit for $44, or a fully assembled device for $56 ($66 with a 3D printed case, which is also available on MakerWorld). Those interested in making a purchase will also want to visit OpenSpool.io, which houses installation and configuration instructions for the device, as well as additional documentation.