Filament Runout Detection Feature

The Filament Runout Detection feature is designed to prevent damage to the nozzle. When the filament runs out, the print is stopped. The hot ends are turned off so they will not clog the nozzles with burnt material and the toolhead moves off the print back to the parked position at the side of the bed to avoid the nozzle getting stuck in the print.

The AON-M2 has two filament sensors installed at the back of the machine. Filament is fed through the sensors into the machine.

The filament sensor is located at the rear of the printer where the filament passes through the sensor.

If your filament runs out on one of the spools, the sensor detects that it is empty and triggers. The machine will cancel the print, turn off the hot ends, move the toolhead off the print, and provide a notification message on the user interface.

The machine sends a notification when the feature is triggered.

The Filament Runout Detection feature does not turn off the bed or chamber heat.

Set the Filament Runout Detection feature ON or OFF

The Filament Runout Detection feature is set to OFF by default. This feature can be set from the machine touchscreen or browser interface.

Navigate to the Settings page and then go to the General tab. Turn ON the Filament Runout Detection feature by sliding the toggle to the right or tapping it. When the feature is ON, the toggle turns green. Tap “Save” at the bottom to save your feature selection.

Filament Runout Detection Feature

Printing with only one toolhead

When using only one toolhead, feed a short length of filament through the filament sensor for the toolhead that will not be used. This ensures that its sensor does not trigger.

The feature is intended for use as a preventative measure. It limits damage to the hot end by preventing it from remaining at high temperature without actively extruding. When material sits in the hot end at extrusion temperature for a long time it starts to break down and harden. If left hot long enough, the nozzle becomes completely and irreparably clogged. The Filament Runout Detection feature allows you to safely avoid this situation.

The Filament Runout Detection feature is not intended to replace a good filament management system. It is not possible to resume the print after the filament runout sensor stops the print.

It is important to calculate filament quantity and plan before starting a print to ensure its completion. If your print cannot be completed with one spool, we recommend sourcing a larger spool. Alternatively, you can use the Simplify3D slicer software to split the print so that the bottom section of the part is printed with a process using one toolhead and the top is printed with a second process using the other toolhead. This allows you to load two spools of material for the same print. Please reach out to our Application Specialists in the Customer Success team by emailing if you have any questions about this process.

Last modified: February 17, 2021