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The Duet3D Rotating Magnet Filament Monitor very accurately senses filament movement. Connect it to a Duet 2 Wifi, Ethernet or Maestro 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 magent 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.

Fully assembled in a MJF printed housing.

Documentation.

The filament monitor is easy to setup and calibrate to your filament: Setting up the rotating magnet filament monitor.

Buy a Duet3D rotating magnetic filament monitor from #Spool3D for your 3D printer in Canada without the surprise cost of the exchange rate!