Abstract: A stackable, modular additive manufacturing printer filament feed device including various modules, or components, used to track, quantify, feed, and treat filament used in a 3D printer. The device is designed to provide an accurate quantification of the amount of filament remaining in an additive manufacturing printer by tracking the bidirectional linear translation of filament being fed into the additive manufacturing printer. In addition, the device is portable and does not require an input from the printer to operate; instead, the device mechanically couples to the printer, such that filament passes through the device and is fed into the printer during a printing project. The stackable nature of the device allows for customization depending on printing needs—as such, the device can perform multiple functions, in addition to feeding and tracking filament to an additive manufacturing printer.