Magnetic Filament Monitor

Product description
The Duet3D Rotating Magnet Filament Monitor very accurately senses filament movement. Connect it to a Duet 2 or Duet 3 and the controller will use the indicated movement to determine a wide range of extrusion issues including:
Filament run out
Extruder skipping steps
Nozzle starting to jam (causing skipped steps or grinding)
Filament beginning to grind in the extruder
It does this so accurately because it is effectively an extruder in reverse. The filament movement rotates a custom machined hobbed magnet assembly; the magnet rotation is sensed and constantly reported to the Duet. This method has proven extremely accurate across a wide range of filaments – frequently capable of pausing the print before a filament jam or other issue has already caused the print to fail.
Kit Only: The monitor is only available as a kit excluding the printed housing at this stage, with a £10 discount of the normal price of £45 as you need to print your own housing (we provide a design). It comes with a connector pack with the Molex-KK-style housings and crimps to connect the monitor to the Duet.