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Prusa Filament Out Sensor
by jmillerfo
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12/30/17 Update
This part supports Filament Out sensing directly by the Prusa Mini-Rambo 1.3a board. See section below for implementation. __Please note this requires a non-standard firmware load.__ This far I have not found any item supported by Prusa 3.1.0 firmware that this modified firmware does not support as well. This has the advantage of supporting Filament Out sensing when printing from the SD card as well as OctoPrint.
This **Prusa i3 MK2(S)** *Filament Run Out Sensor* detects filament exhaustion and triggers a _Filament Change_ using M600 command. After the filament is changed, printing is resumed at the point of interruption.
This design depends on __Octoprint__ to process the _Pause, Filament Change,_ and _Resume_ commands. Other applications could utilize this accessory as long as they rely on GPIO4 (Board Pin 7) to signal Filament exhaustion.
This part supports Filament Out sensing directly by the Prusa Mini-Rambo 1.3a board. See section below for implementation. __Please note this requires a non-standard firmware load.__ This far I have not found any item supported by Prusa 3.1.0 firmware that this modified firmware does not support as well. This has the advantage of supporting Filament Out sensing when printing from the SD card as well as OctoPrint.
This **Prusa i3 MK2(S)** *Filament Run Out Sensor* detects filament exhaustion and triggers a _Filament Change_ using M600 command. After the filament is changed, printing is resumed at the point of interruption.
This design depends on __Octoprint__ to process the _Pause, Filament Change,_ and _Resume_ commands. Other applications could utilize this accessory as long as they rely on GPIO4 (Board Pin 7) to signal Filament exhaustion.
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