My Da Vinci 3D printer does this - the cartridges report how much filament they have left, and the gcode for a print includes how much filament the print is mea

My Da Vinci 3D printer does this - the cartridges report how much filament they have left, and the gcode for a print includes how much filament the print is meant to use. When the printer thinks a cartridge of filament is empty, it refuses to use it, even if it still has filament in it. Like many other DRM'd products, there are hacks for the printer that can get around this (one resets the filament "odometer", another convinces the printer that your print uses zero meters of filament). Existence of these hacks typically doesn't affect the makers of these DRM'd consumer-level products (like the cat litter box or the Keurig machine), in my estimation. Most consumers simply won't know that they have an option to either by choose another vendor, or find a hack to get around it. People who buy 3D printers are already primed to hack that thing to pieces, though. In that case I think the DRM was a waste of time and money. They didn't understand their target market.